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BLD-2019-1198_USG-shaft-wall-systems-catalog-en-SA926USG SHAFT WALL SYSTEMS LIFE SAFETY ASSURANCE FOR MODERN BUILDING DESIGNS usg.com USG Interior Panel & Finishing Solutions Arnold Hom 06/21/21 HIGH-PERFORMANCE SHAFT WALLS Walls that enclose elevator shafts, stairwells and other vertical shafts are the lifeline of a building. Should a fi re occur, fi refi ghters control the use of elevators, leaving stairwells as the only means for occupant egress or rescue within the building. Since these walls are an important part of the building, they must have the strength to withstand lateral loads and provide needed fi re protection. USER’S GUIDE This brochure explains: • What a shaft wall system comprises • The different applications where shaft wall systems can be used • How to select and specify the appropriate components of a shaft wall system Pages UNDERSTAND YOUR SYSTEM Overview Applications Components Performance Testing 4 SELECT YOUR SYSTEM Performance Selector Limiting Heights Solid Shaft Wall Limiting Spans 14 DESIGN YOUR SYSTEM Design Details Good Design Practices 23 SPECIFY YOUR SYSTEM Application Guide Specifications 36 USG Shaft Wall Systems | 3 OVERVIEW USG Shaft Wall Systems are non-load-bearing gypsum wall partition assemblies constructed from outside the shaft at each floor. Shafts are enclosed early in construction, and the walls are finished later, along with interior partitions. Installation is quick and easy, using components and application procedures familiar to drywall contractors. This system installs faster than other multilayer gypsum panel systems because it is installed from one side, leaving the shaft free of scaffolding. The assemblies are constructed of gypsum liner panels friction-fitted into C-H studs in a progressive manner, with gypsum panels, gypsum fiber panels or cement board applied to the face. All details, specifications and data contained in this literature are intended as a general guide. These products must not be used in a design or construction of any given structure without complete and detailed evaluation by a qualified structural engineer or architect to verify suitability of a particular product for use in the structure. Utility chase USG C-H stud USG C-H stud USG J-runner Two USG Jamb Struts USG Sheetrock® Brand Gypsum Panels USG Sheetrock® Brand Gypsum Panels Elevator car Elevator shaft Elevator shaft door frame 1" USG Sheetrock® Brand Gypsum Liner Panels 1" USG Sheetrock® Brand Gypsum Liner Panels 1" USG Sheetrock® Brand Mold Tough® Gypsum Liner Panels 1" USG Sheetrock® Brand Glass-Mat Liner Panels TYPICAL SHAFT WALL ASSEMBLY USG Shaft Wall Systems | 4 APPLICATIONS Use USG Shaft Wall Systems to construct elevator shafts, mechanical shafts, stairwells, air return shafts and horizontal membranes. These shafts are vital for vertical communication, power, water, fresh air, exhaust and a means of egress. Intermittent Air Pressure Loads Intermittent Air Pressure Loads Elevator shafts Ideal for elevator shafts since the walls can be constructed from one side, leaving the shaft free of scaffolding. This allows elevator equipment to be installed simultaneously. Stair shafts Accommodates stair shafts by allowing both sides of the wall to be finished when required. For added abuse resistance in stairwells, face layer panels can be substituted with USG Sheetrock® Brand Mold Tough® AR Firecode® X, USG Sheetrock® Brand Mold Tough® VHI Firecode® X or USG Fiberock® Abuse-Resistant Interior Panels. Intermittent Air Pressure Loads Sustained Pressure Loads Mechanical shafts Vertical HVAC piping and ductwork can easily be contained within the system, as well as allowing for wall penetrations when required. Air shafts (unlined) The system can also be used for vertical air shafts within the building. Shafts can be unlined when specific conditions are met. Unlined shaft walls can accommodate sustained air pressure up to 10 psf. See page 20 for more information. WALLS USG Shaft Wall Systems | 5 APPLICATIONS Use USG Shaft Wall Systems to construct elevator shafts, mechanical shafts, stairwells, air return shafts and horizontal membranes. These shafts are vital for vertical communication, power, water, fresh air, exhaust and a means of egress. Solid Shafts Horizontal Stud Shafts Solid shafts are normally used to construct mechanical or duct enclosures, or in areas where a small section of shaft wall is needed for a single vertical pipe penetration. See page 21 for more information. For certain applications, equipment limitations sometimes make it difficult to install shaft liner panels and studs vertically. This is true for walls separating shafts when there is only a structural beam provided for supporting the wall. Shaft Wall Ceiling Membrane The two-hour horizontal membrane (also used in two-hour duct enclosures), and the membranes used as the ceiling of one- and two-hour egress corridors, are shown on page 23. When the span of the two-hour horizontal membrane is greater than 5'-4", use Underwriters Laboratories Inc. (UL) Design K504 and K506, per details on page 24. WALLS CEILINGS USG Shaft Wall Systems | 6 COMPONENTS USG Shaft Wall Systems have been comprehensively tested for fire resistance ratings only when all of the system components are used together. Substitutions of any of the components are not recommended and are not supported by USG. Refer to the appropriate product Safety Data Sheet for complete health and safety information. USG Sheetrock® Brand Gypsum Liner Panels (UL Type SLX) • High-performance panel has a noncombustible core encased in a water-resistant, 100% recycled green face and back paper • UL/ULC Classification as to fire resistance, surface burning characteristics and noncombustibility • Panel is 1" thick and 24" wide with beveled edges • Refer to product submittal sheet WB2278 for more information USG Sheetrock® Brand Mold Tough® Gypsum Liner Panels (UL Type SLX) • High-performance panel has a noncombustible and moisture- and mold-resistant gypsum core enclosed in a moisture- and mold-resistant, 100% recycled blue face and back paper • UL/ULC Classification as to fire resistance, surface burning characteristics and noncombustibility • Panel is 1" thick and 24" wide with beveled edges • Refer to product submittal sheet WB2389 for more information USG Sheetrock® Brand Glass-Mat Liner Panels (UL Type SLX) • High-performance panel has a noncombustible and moisture- and mold-resistant gypsum core enclosed in a moisture- and mold-resistant glass mat on both sides • Can be left exposed for up to 12 months • UL/ULC Classification as to fire resistance, surface burning characteristics and noncombustibility • Panel is 1" thick and 24" wide with beveled edges • Refer to product submittal sheet WB2483 for more information USG Sheetrock® Brand Firecode® X Panels (UL Type SCX) • All of the advantages of regular panel with additional resistance to fire • UL/ULC Classification as to fire resistance, surface burning characteristics and noncombustibility • Available in 5/8" thickness, 4' width • Refer to product submittal sheet WB1473 for more information USG Sheetrock® Brand UltraLight Panels Firecode® X (UL Type ULX and ULIX) • All of the advantages of USG Sheetrock® Brand Firecode® X Gypsum Panels • Lighter weight makes it easier to transport, handle and install • UL/ULC Classification as to fire resistance, surface burning characteristics and noncombustibility • Available in 5/8" thickness, 4' width • Refer to product submittal sheet WB2598 for more information USG Sheetrock® Brand Firecode® C Panels (UL Type C) • Provide improved fire resistance over standard USG Sheetrock® Brand Firecode® X Panels because of additives that enhance integrity of the core under fire exposure • UL/ULC Classification as to fire resistance, surface burning characteristics and noncombustibility • Available in 5/8" and 1/2" thicknesses, 4' width • Refer to product submittal sheet WB1473 for more information GYPSUM LINER PANELS GYPSUM PANELS AND CEMENT BOARD USG Shaft Wall Systems | 7 COMPONENTS USG Sheetrock® Brand Mold Tough® Firecode® X Panels (UL Type SCX) • Panel has a noncombustible, moisture- and mold-resistant gypsum core encased in a moisture- and mold-resistant, 100% recycled green face and brown back paper • Tapered long edges for easy finishing • UL/ULC Classification as to fire resistance, surface burning characteristics and noncombustibility • Available in 5/8" thickness, 4' width • Refer to product submittal sheet WB2390 for more information USG Sheetrock® Brand Mold Tough® AR Firecode® X Panels (UL Type AR) • Panel has a noncombustible, moisture- and mold-resistant gypsum core encased in a moisture- and mold-resistant, 100% recycled green face and brown back paper • Tapered long edges for easy finishing • UL/ULC Classification as to fire resistance, surface burning characteristics and noncombustibility • Available in 5/8" thickness, 4' width • Manufactured for greater abuse resistance than standard 5/8" gypsum panels • Meet ASTM C1629 Level 2 for soft-body impact and surface abrasion and Level 1 for indentation resistance • Refer to product submittal sheet WB2391 for more information USG Sheetrock® Brand Mold Tough® VHI Firecode® X Panels (UL Type AR) • Panel has a noncombustible, moisture- and mold-resistant gypsum core encased in a moisture- and mold-resistant, 100% recycled green face and brown back paper • Tapered long edges for easy finishing • UL/ULC Classification as to fire resistance, surface burning characteristics and noncombustibility • Available in 5/8" thickness, 4' width • Core is reinforced with a high-strength mesh for heavy-duty impact resistance • Meet ASTM C1629 Level 3 for soft- and hard-body impact resistance • Refer to product submittal sheet WB2529 for more information USG Sheetrock® Brand Glass-Mat Panels Mold Tough® Firecode® X (UL Type SGX) • Panel has a noncombustible, moisture- and mold-resistant gypsum core encased in a moisture- and mold-resistant fiberglass mat • Tapered long edges for easy finishing • UL/ULC Classification as to fire resistance, surface burning characteristics and noncombustibility • Available in 5/8" thickness, 4' width • Suitable for use in pre-dry-in (fast track) and similar applications of wallboard before the building envelope is fully enclosed • Can be exposed to weather up to 12 months • Refer to product submittal sheet WB2560 for more information USG Sheetrock® Brand Glass-Mat Panels Mold Tough® AR (UL Type AR) • Panel has a noncombustible, moisture- and mold-resistant gypsum core encased in a moisture- and mold-resistant fiberglass mat • Provide greater abuse resistance compared to standard drywall • Meet ASTM C1629 Level 3 for abrasion and soft-body resistance • Suitable for use in pre-dry-in (fast track) and similar applications of wallboard before the building envelope is fully enclosed • UL/ULC Classification as to fire resistance, surface burning characteristics and noncombustibility • Available in 5/8" thickness, 4' width • Can be exposed to weather up to 12 months • Refer to product submittal sheet WB2750 for more information USG Shaft Wall Systems | 8 COMPONENTS USG Sheetrock® Brand Glass-Mat Panels Mold Tough® VHI (UL Type AR) • Panel has a noncombustible, moisture- and mold-resistant gypsum core encased in a moisture- and mold-resistant fiberglass mat • Provide superior impact resistance and are an upgrade to abuse-resistant panels • Meet ASTM C1629 Level 3 for hard- and soft-body impact resistance • Suitable for use in pre-dry-in (fast track) and similar applications of wallboard before the building envelope is fully enclosed • UL/ULC Classification as to fire resistance, surface burning characteristics and noncombustibility • Available in 5/8" thickness, 4' width • Can be exposed to weather up to 12 months • Refer to product submittal sheet WB2749 for more information USG Sheetrock® Brand Ultracode® Core Panels (UL Type ULTRACODE) • 3/4" thick panel can achieve a two-hour fire rating with single-layer construction when used with mineral wool insulation in steel framed walls • Available in 4' width • Refer to product submittal sheet WB2167 for more information USG Sheetrock® Brand Mold Tough® Ultracode® Core Panels (UL Type ULTRACODE) • 3/4" thick panel can achieve a two-hour fire rating with single-layer construction when used with mineral wool insulation in steel framed walls • Panel has a noncombustible, moisture- and mold-resistant gypsum core encased in moisture- and mold- resistant green face and brown back paper • UL/ULC Classification as to fire resistance, surface burning characteristics and noncombustibility • Refer to product submittal sheet WB2388 for more information USG Durock® Brand Cement Board (UL Type DCB) • Water-durable, mold-resistant substrate for high-moisture areas • Refer to product submittal sheet CB399 for more information USG Fiberock® Abuse-Resistant Interior Panels (UL Type FRX-G) • Resist denting, breaking and puncturing, even in high-traffic areas • Excellent fire resistance • Made from 95% recycled materials • Refer to product submittal sheet F102 for more information USG Fiberock® Aqua-Tough™ Interior Panels (UL Type FRX-G) • Used only for wall designs • Increased resistance to abrasion, indentation and penetration • Made from 95% recycled materials • Refer to product submittal sheet F134 for more information USG Imperial® Gypsum Base, Firecode® X (UL Type IP-X1) and Firecode® C (UL Type IP-X2) • Panels offered in a range of sizes, rigid base for fire-rated gypsum veneer plaster systems • Designed for direct or resilient attachment to wood or steel framing core composition • Multilayered face paper to control water absorption and resist sag • Refer to product submittal sheet P790 for more information USG Shaft Wall Systems | 9 COMPONENTS USG Steel J-Runner (JR)USG Steel C-H Stud (CH) 21 /2", 4", 6" 1" 2" 1" 7/32" 1 3/8" 21 /2", 4", 6" 1 1 /2" USG Steel Jamb-Strut (JS) USG Steel E-Stud (ES) 1" 21 /2", 4", 6" 3" 3/4"1" 1" 3/8" 21 /2", 4", 6" Thickness–Steel Framinga Components Design Thicknessb Minimum Thickness Style in.in.ga. CH, ES 0.0188 0.0179 25 JR 0.0239 0.0227 24 CH, ES, JR, JS 0.0359 0.0341 20 Structural Properties–Steel Framing Components Component and Size Product Identification Average Weight (lb./lin. ft.) Area (sq. in.)I x (in. 4)S xc (cu. in.)Allowance Design Stress (ksi) 2-1/2" C-H Stud 212CH-18 0.5186 0.1524 0.129 0.093 19.8 212CH-34 0.998 0.2910 0.239 0.1741 24.0 4" C-H Stud 400CH-18 0.6118 0.1798 0.383 0.162 19.8 400CH-34 1.243 0.3433 0.730 0.318 24.0 6" C-H Stud 600CH-34 1.366 0.4227 1.998 0.569 24.0 Double 6" E-Stud 600ES-18 1.546 0.3982 2.004 0.628 20.00 600ES-34 2.372 0.6364 3.400 1.094 20.00 2-1/2" J-Runner 212JR-23 0.448 0.1346 0.117 0.085 3.00 212JR-34 0.670 0.2039 0.192 0.130 4.96 4" J-Runner 400JR-23 0.573 0.1705 0.351 0.163 3.00 400JR-34 0.857 0.2577 0.574 0.251 4.96 6" J-Runner 600JR-23 0.740 0.2183 0.937 0.295 3.00 600JR-34 1.107 0.3295 1.523 0.457 4.96 2-1/2" Jamb Strut 212JS-34 0.818 0.2398 0.226 0.143 3.00 4" Jamb Strut 400JS-34 1.006 0.2936 0.647 0.270 3.00 6" Jamb Strut 600JS-34 1.256 0.3654 1.673 0.485 3.00 Note (a) Studs and runners comply with ASTM C645. (b) Properties of steel framing members have been calculated in conformance with ANSI Specification for the Design of Cold-Formed Steel Structural Members, 1996 edition. (c) Full section modulus to be used with corresponding design stress. STEEL FRAMING USG Shaft Wall Systems | 10 COMPONENTS USG Sheetrock® Brand Acoustical Sealant • Superior performance as a fire caulk in UL-Classified joint systems • Minimizes whistling and dirt accumulation due to air movement when applied to partition perimeter and penetrations • Refer to product submittal sheet J678 for more information USG Sheetrock® Brand First Coat™ Primer • A flat latex paint formulated to provide a superior first (prime) coat over interior gypsum board and concrete surfaces • Equalizes porosity and surface texture differences to provide greater uniformity of finish coat • Refer to product submittal sheet J1095 for more information USG Sheetrock® Brand All Purpose Joint Compound • Versatile performer: tape, finish, texture, laminate or skim coat • Combines single-package, ready-mixed convenience with good taping and topping performance • Refer to product submittal sheet J60A for more information USG Sheetrock® Brand Plus 3® Lightweight All Purpose Joint Compound • Weighs up to 30% less than conventional compounds and sands with the ease of a topping compound • With very low shrinkage, it requires only two coats over metal, such as corner beads and fasteners • Refer to product submittal sheet J498A for more information USG Sheetrock® Brand Tuff-Hide™ Primer-Surfacer • A high solids, vinyl, acrylic latex-based coating for interior spray application over new drywall • Single spray application provides the same results achieved using a typical two-step process of skim coating surfaces with joint compound followed by a coat of primer • Saves time and money • Refer to product submittal sheet J1691 for more information USG Sheetrock® Brand Paper-Faced Metal Corner Bead and Trim • Cost-effective, problem-free, beautiful corners • Superior solution to edge cracking and chipping • Refer to product submittal sheet J1356 for more information INTERIOR FINISHING PRODUCTS USG Shaft Wall Systems | 11 PERFORMANCE TESTING USG Shaft Wall Systems provide superior safety and performance for an important building component. USG Shaft Wall Systems result from a program of extensive testing and continuous improvements to help you achieve the superior performance that your project demands. Systems provide up to four-hour fire resistance and sound ratings up to 52 Sound Transmission Class (STC), and resist both sustained and intermittent lateral loads and fatigue under cyclic lateral loading. All USG products and systems undergo exhaustive testing to ensure that they meet exacting standards. USG products are classified as to fire resistance and fire-hazard properties. As part of this protocol, UL periodically audits production of these materials to ensure compliance with necessary properties. UL is an independent, not-for-profit organization that has tested products for public safety for over a century. Products are manufactured and tested in accordance with recognized standards. ASTM International is one of the largest voluntary standards development organizations in the world, and is a trusted source for technical standards for materials, products, systems and services. These systems have been designed and tested using accepted engineering practices with deflection limits of L/120, L/240 and L/360. Additionally, limiting height tables listed herein account for flexural and shear stresses. A wide range of product and system combinations is available to meet performance requirements: intermittent and sustained air pressure loading of 5, 7-1/2, 10 and 15 psf. Fire Protection: In the event of a fire, mechanical shafts and stairs are vital channels for communication, power, water, air, exhaust and egress—making the shafts the lifelines of the building. Since it is critically important that these walls protect occupants and necessary services from fire, USG Shaft Wall Systems have been tested for fire endurance. The primary attribute of USG Shaft Wall Systems and their components is fire resistance. Testing supporting this attribute ensures that this critical performance component will not be compromised when properly installed. This fire testing results in the following: • UL Classification of all gypsum panel components • UL fire resistance Classifications for one- to four-hours • UL system testing with all major elevator door manufacturers • UL listing for fire damper installation • Fire test data for electrical panels, call-button boxes and other interfaces • UL listing of shaft wall head of wall See the Good Design Practices section for more information on fire resistance. Sound Control: Sound control test data demonstrate the effectiveness of USG Shaft Wall Systems in attenuating sound. When properly designed and installed, USG Shaft Wall Systems will increase comfort levels by reducing unwanted noise from adjacent spaces. The standard assembly offers 39 STC rating; 47 STC is achieved by adding 1" sound insulation within the partition cavity, and 52 STC with single-layer 3/4" USG Sheetrock® Brand Ultracode® Core Panels and 3" sound insulation. PERFORMANCE TESTS TESTING METHODS TESTING RESULTS USG Shaft Wall Systems | 12 PERFORMANCE TESTING Impact Resistant for Durability: Performance utilizing abuse-resistant and impact-resistant gypsum panels like USG Sheetrock® Brand Mold Tough® AR or VHI Firecode® X Panels. USG Shaft Wall Systems meet requirements of IBC Sections 403.2.3.1 and 403.2.3.2. Moisture/Mold: The best way to minimize damage from moisture and mold is to minimize or eliminate exposure to water before, during and after construction. In all cases where moisture intrusion occurs, eliminate all sources of moisture immediately. USG Sheetrock® Brand Gypsum Liner Panels, USG Sheetrock® Brand Mold Tough® Gypsum Liner Panels and USG Sheetrock® Brand Glass-Mat Liner Panels have water-resistant facings. In addition, USG Sheetrock® Brand Mold Tough® and USG Sheetrock® Brand Glass-Mat Liner Panels have moisture- and mold-resistant facings and a water-resistant core. When used in conjunction with good construction practices, these products will minimize, but not eliminate, the risk of moisture and mold damage. For more information on moisture control and mold, see Moisture, Mold and Construction Practices (WB2317), and Moisture-Resistant Assemblies (SA934). The following websites are other resources: New York City Department of Health nyc.gov/html/doh/html/environmental/mold.shtml Search for mold resources. United States Environmental Protection Agency epa.gov Search for mold resources. Responsible Solutions to Mold Coalition responsiblemoldsolutions.org Search for mold resources. TESTING RESULTS USG Shaft Wall Systems | 13 PERFORMANCE SELECTOR The following notes offer alternative methods of construction: 1. Where insulation by composition is shown in assembly drawings, the specific type of product is required in the assembly to achieve the stated fire-resistance rating. Otherwise, mineral wool or glass fiber insulation may be incorporated into any assembly without compromising the fire-resistant rating. 2. Stud depths are minimum required for fire-resistant rating. 3. Where RC-1 resilient channel is indicated, RC-1 or equivalent may be used. RC-2 is not an equivalent substitution. 4. Use L/360 deflection criteria for limiting height/stud selection and 20 ga. minimum framing when applying USG Durock® Brand Cement Board. Refer to USG Durock® Brand Cement Board submittal (CB399), for more information on application and related products. 5. 5/8" USG Imperial® Gypsum Base, 5/8" USG Sheetrock® Brand Mold Tough® Firecode® X Panels or 5/8" USG Fiberock® Aqua-Tough™ Interior Panels may be substituted for 5/8" USG Sheetrock® Brand Firecode® X Panels. 6. 1/2" USG Sheetrock® Brand Mold Tough® Firecode® C or 1/2" USG Imperial® Gypsum Base, Firecode® C may be substituted for 1/2" USG Sheetrock® Brand Firecode® C Panels. 7. Use 20 ga. minimum framing with USG Sheetrock® Brand Mold Tough® AR and VHI Firecode®, USG Sheetrock® Brand Glass-Mat Panels Mold Tough® AR and VHI, USG Durock® Brand Cement Board or USG Fiberock® Panels. 8. 1" USG Sheetrock® Brand Mold Tough® Gypsum Liner Panels, or USG Sheetrock® Brand Glass-Mat Liner Panels may be substituted for 1" USG Sheetrock® Brand Gypsum Liner Panels in all systems without compromising the fire rating. 9. For more information about performance-rated shaft wall systems and for complete list of USG's fire-rated designs, visit USG Design Studio at usgdesignstudio.com. 10. For detailed information regarding UL Classified designs shown in the Performance Selector, please refer to the UL Fire Resistance Directory at ul.com. ALTERNATIVE MATERIALS AND SPECIAL REQUIREMENTS USG Shaft Wall Systems | 14 PERFORMANCE SELECTOR All details, specifi cations and data contained in this literature are intended as a general guide. These products must not be used in a design or construction of any given structure without complete and detailed evaluation by a qualifi ed structural engineer or architect to verify suitability of a particular product for use in the structure. Non-loadbearing Acoustical Performance Reference Construction Detail Description Test Number STC Test Number ARL Index ONE-HOUR FIRE-RATED CONSTRUCTION wt. 8 31 ⁄8" • 5/8" USG Sheetrock® Brand Firecode® X Panels, joints fi nished • 2-1/2" USG C-H studs 25 gauge 24" o.c. • 1" USG Sheetrock® Brand Gypsum Liner Panels UL Design U415, System A or U469 39 USG-040901 Based on 4" C-H studs 25 gauge SA926 1 TWO-HOUR FIRE-RATED CONSTRUCTION wt. 9 31 ⁄2" • 1/2" USG Sheetrock® Brand Firecode® C Panels, face layer joints fi nished • 2-1/2" USG C-H studs 25 gauge 24" o.c. • 1" USG Sheetrock® Brand Gypsum Liner Panels UL Design U415, System B or U438 38 USG-040917 SA926 2 43 USG-040917 Based on 4" C-H studs 25 gauge 48 RAL-OT-04-022 Based on 1" sound batts in cavity 50 RAL-OT-04-019 Based on 4" C-H studs 25 gauge with 3" mineral fi ber insulation wt. 8 43⁄4" • 3/4" USG Sheetrock® Brand Ultracode® Core Panels, joints fi nished • 4" USG C-H studs 25 gauge 24" o.c. • 3" Thermafi ber® SAFB • 1" USG Sheetrock® Brand Gypsum Liner Panels UL Design U415, System C 51 RAL-OT-04-020 Based on 4" C-H studs with 3" Thermafi ber® SAFB insulation SA926 3 wt. 10 35⁄8" • 1/2" USG Durock® Brand Cement Board • 5/8" USG Sheetrock® Brand Firecode® X Panels • 2-1/2" USG C-H studs 20 gauge 24" o.c. • 1-1/2" Thermafi ber® SAFB • 1" USG Sheetrock® Brand Gypsum Liner Panels • USG Durock® Brand Cement Board, screw attached and laminated to gypsum panel with four vertical strip ceramic tile mastic centered between studs UL Design U415, System D SA926 4 wt. 9 31 ⁄2" • 1/2" USG Sheetrock® Brand Firecode C® Panels • 2-1/2" USG C-H studs 25 gauge 24" o.c. • 1" USG Sheetrock® Brand Gypsum Liner Panels • Joints fi nished both sides UL Design U415, System E or U467 44 USG-040911 Based on 4" C-H studs 25 gauge SA926 5 wt. 10 4" • 1/2" USG Sheetrock® Brand Firecode® C Panels applied vertically, face layer joints fi nished • RC-1 resilient channel or equivalent 24" o.c. • 2-1/2" USG C-H studs 25 gauge 24" o.c. • 1" USG Sheetrock® Brand Gypsum Liner Panels UL Design U415, System F 53 USG-040909 Based on 4" C-H studs 25 gauge with 3" mineral fi ber insulation SA926 6 58 USG-040910 Based on 4" C-H studs 25 gauge with additional layer on liner panel side and 3" mineral fi ber insulation wt. 8 2" 2" • 1" x 2" perimeter angles 25 gauge • 1" USG Sheetrock® Brand Gypsum Liner Panels, fastened to angles • 1/2" USG Sheetrock® Brand Firecode C® Panels, joints fi nished UL Design U529 SA926 7 USG Shaft Wall Systems | 15 PERFORMANCE SELECTOR Non-loadbearing Acoustical Performance Reference Construction Detail Description Test Number STC Test Number ARL Index TWO-HOUR FIRE-RATED CONSTRUCTION 51 ⁄4" • 5/8" USG Sheetrock® Brand Firecode® X Panels, face layer joints fi nished • 4" USG C-H studs 20 gauge 24" o.c. run horizontally and attached to vertical USG J-runners, 20 gauge • 1" USG Sheetrock® Brand Gypsum Liner Panels UL Design U437 USG-040901 Based on 4" C-H studs 25 gauge SA926 8 THREE-HOUR FIRE- RATED CONSTRUCTION wt. 13 43⁄8" • 5/8" USG Sheetrock® Brand Firecode® C Panels, face layer joints fi nished • 2-1/2" USG C-H studs 25 gauge 24" o.c. • 1" USG Sheetrock® Brand Gypsum Liner Panels UL Design U415, System G SA926 9 wt. 13 43⁄8" • 5/8" USG Sheetrock® Brand Firecode® C Panels, face layer joints fi nished • 2-1/2" USG C-H studs 25 gauge 24" o.c. • 1" USG Sheetrock® Brand Gypsum Liner Panels • 5/8" USG Sheetrock® Brand Firecode® C Panels, joints fi nished UL Design U415, System H 49 USG-040902 Based on 4" C-H studs SA926 10 FOUR-HOUR FIRE- RATED CONSTRUCTION wt. 18 63⁄8" • 3/4" USG Sheetrock® Brand Ultracode® Core Panels, on furring channel 24" o.c., over two layers, face layer joints fi nished • 2-1/2" USG C-H studs 25 gauge 24" o.c. • 1" USG Sheetrock® Brand Gypsum Liner Panels • Base layer over furring channel applied vertically UL Design U415, System I SA926 11 Note Stud size and gauge shown are minimums. Possible panel substitutions. USG Shaft Wall Systems | 16 PERFORMANCE SELECTOR WALL SYSTEMS—LIMITING HEIGHTS USG Shaft Wall Systems are engineered to withstand pressure loads and provide in-service impact resistance to ensure long-term performance and durability. Use this section to determine the size and gauge of framing for the system you select. You will need to know elevator pressures and other in-service demands. Flexing Resistance for In-Service Performance: Shaft walls are subjected to both positive and negative pressures as elevator cabs rise and descend. This piston effect of an elevator in its shaft causes continual flexing of the shaft wall. In tests, USG Shaft Wall Systems were subjected to over 1 million full oscillation cycles to model wall performance through the life of the building. These tests showed that a 25 ga. J-runner is inadequate at the top or bottom of a shaft wall. As the long runner leg is continually flexed from wall deflection, it can rupture and screws can strip out and fracture from the flexing. Oscillation tests showed 24 ga. J-runners minimize these problems and are essential to long-term safety. Maximum partition heights are shown for four different intermittent air pressure loads and three allowable deflections. The applied pressure load is selected by the designer based on elevator cab speed and the number of elevators per shaft. Instead of using only deflection criteria, USG design data consider several additional factors in determining limiting partition heights: A. Bending stress—the unit force exerted that will break or distort the stud. B. End reaction shear—determined by the amount of force applied to the stud, which will bend or shear the J-runner or cripple the stud. C. Deflection—the actual deflection under a load. Allowable deflection is based on the amount of bending under load that a particular wall can experience without exceeding a prescribed ratio related to partition height. The air pressure load on shaft walls depends upon the elevator cab speed and the number of elevators per shaft. The following recommendations are derived from USG tests conducted in three high-rise buildings ranging in height from 17 to 100 stories. Recommended Elevator Shaft Pressure Load Elevator velocity ft./min.One or two elevators per shaft Three or more elevators per shaft 0 to 180 5.0 psf 5.0 psf 180 to 700 7.5 psf 5.0 psf 700 to 1,600 10.0 psf 7.5 psf 1,600 to 2,000 15.0 psfa 7.5 psf Note (a) Single-cab, high-speed elevator shafts may require special design considerations. STRUCTURAL PERFORMANCE LIMITING HEIGHTS ELEVATOR SHAFT PRESSURES USG Shaft Wall Systems | 17 PERFORMANCE SELECTOR WALL SYSTEMS—LIMITING HEIGHTS TABLE INTERMITTENT AIR PRESSURE LOAD (WIND LOAD)–PSFa One-Hour Shaft Wall / Stairwell (U415 System A)b Two-Hour Shaft Wall (U415 System C)b Stud Type and Size Designation Allowable Deflection 5 7.5 10 15 5 7.5 10 15 2-1/2" C-H Studs 212CH-18 L/120 11' 5" 10' 0" 9' 1" d 7' 11" d ———— L/240 10' 7" 9' 3" 8' 4" d 7' 4" d ———— L/360 9' 4" 8' 2" 7' 5" 6' 6" ———— 212CH-34 L/120 13' 5" 11' 8" 10' 8" 9' 3" ———— L/240 12' 3" 10' 9" 9' 9" 8' 6" ———— L/360 10' 10" 9' 6" 8' 7" 7' 6" ———— 4" C-H Studs 400CH-18 L/120 15' 2" 12' 5" 10' 9" d 8' 9" d 15' 2" 12' 5" 10' 9" d 8' 9" d L/240 14' 5" 12' 5" 10' 9" d 8' 9" d 14' 5" 12' 5" 10' 9" d 8' 9" d L/360 12' 9" 11' 2" 10' 1" d 8' 9" d 12' 9" 11' 2" 10' 1" d 8' 9" d 400CH-34 L/120 20' 5" 17' 10" 16' 2" d 13' 4" d 20' 5" 17' 10" 16' 2" d 13' 4" d L/240 17' 6" 15' 3" 13' 10" 12' 1" d 17' 6" 15' 3" 13' 10" 12' 1" d L/360 15' 3" 13' 4" 12' 1" 10' 7" d 15' 3" 13' 4" 12' 1" 10' 7" d 6" C-H Studs 600CH-34 L/120 26' 3" 21' 5" d 18' 7" d 15' 2" d 26' 3" 21' 5" d 18' 7" d 15' 2" d L/240 24' 0" 21' 0" d 18' 7" d 15' 2" d 24' 0" 21' 0" d 18' 7" d 15' 2" d L/360 21' 1" 18' 5" 16' 9" d 14' 8" d 21' 1" 18' 5" 16' 9" d 14' 8" d Double 6" E-Studs 600ES-34 L/120 28' 0" 28' 0" d 28' 0" d 20' 0" d 28' 0" 28' 0" d 28' 0" d 20' 0" d L/240 28' 0" 24' 9" 22' 6" d 20' 0" d 28' 0" 24' 9" 22' 6" d 20' 0" d L/360 25' 3" 21' 9" 19' 6" 17' 3" d 25' 3" 21' 9" 19' 6" 17' 3" d Two-Hour Shaft Wall (U415 System B, D, F)Two-Hour Stairwell (U415 System E)c Stud Type and Size Designation Allowable Deflection 5 7.5 10 15 5 7.5 10 15 2-1/2" C-H Studs 212CH-18 L/120 12' 4" 10' 10" 9' 10" d 8' 7" 12' 2" 10' 8" 9' 8" d 8' 5" L/240 11' 4" 9' 11" 8' 12" d 7' 10" 11' 2" 9' 9" 8' 10" d 7' 9" L/360 10' 4" 9' 1" 8' 3" 7' 2" 9' 10" 8' 7" 7' 10" 6' 10" 212CH-34 L/120 14' 3" 12' 5" 11' 4" 9' 11" 14' 2" 12' 5" 11' 3" 9' 10" L/240 12' 10" 11' 3" 10' 2" 8' 11" 13' 0" 11' 5" 10' 4" 9' 1" L/360 11' 7" 10' 1" 9' 2" 8' 0" 11' 6" 10' 0" 9' 1"7' 12" 4" C-H Studs 400CH-18 L/120 17' 9" 14' 6" 12' 7" 10' 3" d 16' 4" 14' 3" d 12' 11" d 10' 7" d L/240 15' 7" 13' 8" 12' 5" 10' 3" d 15' 2" 13' 3" d 12' 0" d 10' 6" d L/360 13' 11" 12' 2" 11' 1" 9' 8" d 13' 4" 11' 8" 10' 7" 9' 3" d 400CH-34 L/120 19' 11" 17' 4" 15' 9" 13' 10" d 19' 6" 17' 1" 15' 6" 13' 7" d L/240 18' 1" 15' 9" 14' 4" 12' 6" 17' 11" 15' 8" 14' 3" 12' 5" L/360 16' 2" 14' 1" 12' 10" 11' 3" 15' 10" 13' 10" 12' 7" 10' 12" 6" C-H Studs 600CH-34 L/120 25' 4" 22' 2" 19' 8" d 16' 1" d 28' 0" 25' 1" d 21' 9" d 17' 9" d L/240 21' 9" 19' 0" 17' 4" 15' 1" d 24' 10" 21' 9" d 19' 9" 17' 3" d L/360 20' 0" 17' 6" 15' 11" 13' 11" 21' 11" 19' 2" 17' 5" 15' 2" Double 6" E-Studs 600ES-34 L/120 28' 0" 28' 0" d 28' 0" d 20' 0" d 28' 0" 28' 0" d 28' 0" d 20' 0" d L/240 28' 0" 26' 3" d 24' 0" d 20' 0" d 28' 0" 26' 0" d 23' 6" d 20' 0" d L/360 26' 3" 23' 0" 21' 0" d 18' 3" d 25' 3" 22' 9" 20' 6" 18' 0" d USG Shaft Wall Systems | 18 PERFORMANCE SELECTOR WALL SYSTEMS—LIMITING HEIGHTS TABLE Three-Hour Shaft Wall (U415 System G) Three-Hour Stairwell (U415 System H)c Stud Type and Size Designation Allowable Deflection 5 7.5 10 15 5 7.5 10 15 2-1/2" C-H Studs 212CH-18 L/120 12' 4" 10' 10" 9' 10" 8' 7" 12' 2" 10' 8" 9' 8" 8' 5" L/240 11' 4" 9' 11" 8' 12" 7' 10" 11' 2" 9' 9" 8' 10" 7' 9" L/360 10' 4" 9' 1" 8' 3" 7' 2" 9' 10" 8' 7" 7' 10" 6' 10" 212CH-34 L/120 14' 3" 12' 5" 11' 4" 9' 11" 14' 2" 12' 5" 11' 3" 9' 10" L/240 12' 10" 11' 3" 10' 2" 8' 11" 13' 0" 11' 5" 10' 4" 9' 1" L/360 11' 7" 10' 1" 9' 2" 8' 0" 11' 6" 10' 0" 9' 1"7' 12" 4" C-H Studs 400CH-18 L/120 17' 9" 14' 6" 12' 7" 10' 3" d 16' 4" 14' 3" d 12' 11" d 10' 7" d L/240 15' 7" 13' 8" 12' 5" 10' 3" d 15' 2" 13' 3" d 12' 0" d 10' 6" d L/360 13' 11" 12' 2" 11' 1" 9' 8" d 13' 4" 11' 8" 10' 7" 9' 3" d 400CH-34 L/120 19' 11" 17' 4" 15' 9" 13' 10" d 19' 6" 17' 1" 15' 6" 13' 7" d L/240 18' 1" 15' 9" 14' 4" 12' 6" 17' 11" 15' 8" 14' 3" 12' 5" L/360 16' 2" 14' 1" 12' 10" 11' 3" 15' 10" 13' 10" 12' 7" 10' 12" 6" C-H Studs 600CH-34 L/120 25' 4" 22' 2" 19' 8" d 16' 1" d 28' 0" 25' 1" d 21' 9" d 17' 9" d L/240 21' 9" 19' 0" 17' 4" 15' 1" d 24' 10" 21' 9" d 19' 9" 17' 3" d L/360 20' 0" 17' 6" 15' 11" 13' 11" 21' 11" 19' 2" 17' 5" 15' 2" Double 6" E-Studs 600ES-34 L/120 28' 0" 28' 0" d 28' 0" d 20' 0" d 28' 0" 28' 0" d 28' 0" d 20' 0" d L/240 28' 0" 26' 3" d 24' 0" d 20' 0" d 28' 0" 26' 0" d 23' 6" d 20' 0" d L/360 26' 3" 23' 0" 21' 0" d 18' 3" d 26' 3" 22' 9" 20' 6" 18' 0" d Four-Hour Shaft Wall (U415 System I) Stud Type and Size Designation Allowable Deflection 5 7.5 10 15 2-1/2" C-H Studs 212CH-18 L/120 12' 4" 10' 10" 9' 10" d 8' 7" L/240 11' 4" 9' 11" 8' 12" d 7' 10" L/360 10' 4" 9' 1" 8' 3" 7' 2" 212CH-34 L/120 14' 3" 12' 5" 11' 4" 9' 11" L/240 12' 10" 11' 3" 10' 2" 8' 11" L/360 11' 7" 10' 1" 9' 2" 8' 0" 4" C-H Studs 400CH-18 L/120 17' 9" 14' 6" 12' 7" 10' 3" d L/240 15' 7" 13' 8" 12' 5" 10' 3" d L/360 13' 11" 12' 2" 11' 1" 9' 8" d 400CH-34 L/120 19' 11" 17' 4" 15' 9" 13' 10" d L/240 18' 1" 15' 9" 14' 4" 12' 6" L/360 16' 2" 14' 1" 12' 10" 11' 3" 6" C-H Studs 600CH-34 L/120 25' 4" 22' 2" 19' 8" d 16' 1" d L/240 21' 9" 19' 0" 17' 4" 15' 1" d L/360 20' 0" 17' 6" 15' 11" 13' 11" Double 6" E-Studs 600ES-34 L/120 28' 0" 28' 0" d 28' 0" d 20' 0" d L/240 28' 0" 26' 3" d 24' 0" d 20' 0" d L/360 26' 3" 23' 0" 21' 0" d 18' 3" d Limiting Criteria c - practical limitation d - deflection f - bending v - end reaction shear Notes • See the Performance Selector for system references and rated assembly details. • Runner fasteners should widthstand 193 lb. single shear and 200 lb. bearing force; attachment spacing should not exceed 24". • L/180 deflection information available upon request from USG. (a) Stud spacing of 24" o.c. (b) For assembly single-layer board attached to studs. (c) For assembly with single-layer board attached to both sides of studs. (e) Attachment of USG steel double 6" E-Stud for USG Shaft Wall Systems. The studs are to be attached back-to-back (web-to-web) with pairs of 1/2" long Type S-12 pan head screws installed in two rows, spaced as widely appart as possible. The first and last pairs of fasteners shall start within 6" of each end of the studs. They shall then be spaced at a maximum of 12" o.c.USG Shaft Wall Systems | 19 PERFORMANCE SELECTOR WALL SYSTEMS—LIMITING HEIGHTS UNLINED SHAFTS Gypsum shaft walls have been used for many years for vent and air shafts. Their fire-resistant features and economical dry construction make them ideal for this use. To function properly, vent and air shaft systems should be designed with the following performance provisions: 1. Gypsum board surface temperature does not exceed 125°F. 2. Separate approved liners should be installed in areas subject to continuous moisture overspray, condensation or air stream temperature over 125°F. 3. Air stream dew point temperatures are maintained below gypsum board surface temperature. 4. The assembly is constructed to withstand sustained design uniform air pressure loads not exceeding 10 psf. Startup surge loads should not be greater than 1-1/2 times the design static load. (See table below for limiting heights.) 5. To ensure airtight construction, select appropriate sealants and apply where required. SUSTAINED PRESSURE LOAD–PSF Two-Hour Fire-Rated System One-Hour Fire-Rated System Stud Type and Size Designation Stud Spacing Allowable Deflection 5 10 5 10 2-1/2" C-H Studs 212CH-18 24"L/120 10' 10"8' 7"10' 0"7' 11" L/240 9' 11" 7' 10"9' 3"7' 4" L/360 9' 1"7' 2"8' 2"6' 6" 212CH-34 24"L/120 12' 5"9' 11"11' 8"9' 3" L/240 11' 3"8' 11"10' 9"8' 6" L/360 10' 1"8' 0"9' 6"7' 6" 4" C-H Studs 400CH-18 24"L/120 14' 6"10' 3"12' 5"8' 9" L/240 13' 8"10' 3"12' 5"8' 9" L/360 12' 2"9' 8"11' 2"8' 9" 400CH-34 24"L/120 17' 4"13' 10"17' 10"13' 4" L/240 15' 9" 12' 6"15' 3"12' 1" L/360 14' 1"11' 3"13' 4"10' 7" 6" C-H Studs 600CH-34 24"L/120 22' 2"16' 1"21' 5"15' 2" L/240 19' 0"15' 1"20' 12"15' 2" L/360 17' 6"13' 11"18' 5"14' 8" For more information, consult Progressive Engineering Report AER-09038 at p-e-i.com Notes Runner fasteners should withstand 193 lb. single shear and 200 lb. bearing force; attachment spacing should not exceed 24" o.c. (a) Use JR20 runner for this height. USG Shaft Wall Systems | 20 PERFORMANCE SELECTOR WALL SYSTEMS—SOLID SHAFT WALL USG Shaft Wall Systems can be used as a vent enclosure for vertical shafts with a two-hour fire rating per UL Design U529. This shaft assembly is particularly suited for structures having a number of relatively small and separated mechanical, service and ventilator shafts. Vent Shaft Elevation USG Sheetrock® Brand Setting-Type Joint Compound lamination 1 /2" USG Sheetrock® Brand Firecode® C Panel 1 1 /2" Type G screws 24" o.c. 1 /2" USG Sheetrock® Brand Firecode® C Panel 1 1 /2" Type G screws 24" o.c. 1" USG Sheetrock® Brand Gypsum Liner Panel 1 5/8" Type S screws 12" o.c. to angle Angle runner 3' 2' 2' 4' 1' 4' 2' Wall Intersection Corner 25 ga. 1" x 2" angle USG Sheetrock® Brand Gypsum Panels 1" USG Sheetrock® Brand Gypsum Liner Panel l 24 ga. 2" x 2" angle USG Sheetrock® Brand Gypsum Panels 1" USG Sheetrock® Brand Gypsum Liner Panel Note Limiting height of system is 12' 0". Install panels vertically and full height only. USG Shaft Wall Systems | 21 PERFORMANCE SELECTOR CEILING SYSTEM—LIMITING SPANS USG Shaft Wall Systems installed horizontally provide economical construction for fire-resistive duct enclosures, corridor ceilings and stairway soffits. Triple Layer: With 1" liner panels inserted in USG C-H studs 24" o.c. and triple-layer 1/2" USG Sheetrock® Brand Firecode® C Panels screw-attached to studs, the system provides two-hour protection from fire. This system is limited to a maximum span of 5'-4". For larger spans, use the “Two-Hour Rated Duct Enclosure (UL Design K504 and K506)” detail as shown on page 24. Double Layer: With double-layer 1/2" USG Sheetrock® Brand Firecode® C Panels screw-attached to studs, the assembly provides two-hour fire-resistive ceiling construction for corridors and stair soffits (see design details). Single Layer: With single-layer 5/8" USG Sheetrock® Brand Firecode® X or C Panels screw-attached to studs, the assembly provides one-hour fire-resistive ceiling construction for corridors and stair soffits. Limitations 1. USG C-H studs are not designed to carry live loads or mechanical equipment or provide material storage area. 2. Maximum stud spacing is 24" o.c.; maximum spans are shown in table below. One-Hour Exit Corridor Ceiling and Stair Soffits Two-Hour Exit Corridor Ceiling and Stair Soffits Single-Layer 5/8" Gypsum Panels c Maximum Span Double-Layer 1/2" Gypsum Panels c Maximum Span 212CH25-18 8' 6"212CH25-18 7' 10" 212CH20-34 10' 4"212CH20-34 9' 8" 400CH25-18 9' 3"400CH25-18 7' 7" 400CH20-34 14' 11"400CH20-34 14' 0" 600CH20-34 20' 10"600CH20-34 19' 7" For more information, consult Progressive Engineering Report AER-09038 at p-e-i.com HORIZONTAL ASSEMBLIES LIMITING SPANS— HORIZONTAL SHAFT WALLS USG Shaft Wall Systems | 22 DESIGN DETAILS CEILING MEMBRANE Two-Hour Rated Assembly – Horizontal Membrane or Metal Duct Enclosure USG Sheetrock® Brand Acoustical Sealant USG Sheetrock® Brand Acoustical Sealant Duct surface Rotated Section 1" USG Sheetrock® Brand Gypsum Liner Panel USG steel C-H stud USG steel J-runner Fastener 24" o.c. max. (shear and withdrawal resistance as required by specific design conditions) Fastener 24" o.c. max. (shear and withdrawal resistance as required by specific design conditions) USG Sheetrock® Brand Gypsum Panels 1/2" Type S pan head screw screw attached to both sides of C-H stud and J runner at top and bottom of stud max. height 4' 0" max. span 5' 4" For more information consult Progressive Engineering Report AER-09038 at p-e-i.com. For spans greater than 5' 4", see UL Design K504 and K506, per details on page 24. Ceiling Membrane of One-Hour Egress Corridors and Stair Soffits (see AER-09038) Ceiling Membrane of Two-Hour Egress Corridors and Stair Soffits (see AER-09038) USG steel J-runner Fasteners as required 24" o.c. USG Sheetrock® Brand Gypsum Panel 1" USG Sheetrock® Brand Gypsum Liner Panel USG Sheetrock® Brand Acoustical Sealant USG steel C-H stud Refer to span table on page 22. USG steel J-runner Fasteners as required 24" o.c. USG Sheetrock® Brand Gypsum Panels 1" USG Sheetrock® Brand Gypsum Liner Panel USG Sheetrock® Brand Acoustical Sealant USG steel C-H stud Refer to span table on page 22. USG Shaft Wall Systems | 23 DESIGN DETAILS CEILING MEMBRANE Two-Hour Duct Enclosure (UL Design K506) Vertical assembly shown is UL Design U415 System B. Corner bead Steel strap RC-1 resilient channels 16" o.c. Steel studs Perimeter channel Duct 5/8" USG Sheetrock® Brand Firecode® C Panels 5/8" USG Sheetrock® Brand Firecode® C Panels 5/8" USG Sheetrock® Brand Firecode® Panels or 5/8" USG Sheetrock® Brand UltraLight Panels Firecode® X 1" USG Sheetrock® Brand Gypsum Liner Panels Two-Hour Rated Ceiling Membrane Assembly (UL Design K504) Two-Hour Rated Ceiling Assembly (UL Design K506) USG Drywall Suspension System 5/8" USG Sheetrock® Brand Firecode® X Panels or 5/8" USG Sheetrock® Brand Firecode® C Panels Resilient channels or furring channels Support structure 5/8" USG Sheetrock® Brand Firecode® C Panels Steel strap Resilient channels or furring channels Steel studs Resilient channels or furring channels Steel strap Perimeter channel USG Shaft Wall Systems | 24 DESIGN DETAILS BASIC INTERFACES—SYSTEM B Head Section (UL System HW-D-0603) Base Section (UL System BW-S-0016) USG steel C-H stud USG Sheetrock® Brand Acoustical Sealant USG steel J-runner USG Sheetrock® Brand Firecode® X Panels 5/8" max.1" min. 3/8" to 1 /2" USG Sheetrock® Brand Gypsum Liner Panels USG Sheetrock® Brand Acoustical Sealant, as required for sound 1" USG Sheetrock® Brand Gypsum Liner Panels Gypsum panel cant screw attached to vertical studs (for projections over 4") USG steel J-runner over 4" 75˚ min. USG steel C-H stud USG Sheetrock® Brand Firecode® X Panels Call-Button Box 4" min USG Sheetrock® Brand Firecode® X Panels Call-button box 25 ga. steel strip (6" x 12" min.) 1" USG Sheetrock® Brand Gypsum Liner Panels USG Shaft Wall Systems | 25 DESIGN DETAILS BASIC INTERFACES—SYSTEM B Wall Junction Outside Corner USG Sheetrock® Brand Acoustical Sealant USG steel J-runner USG steel C-H stud 1" USG Sheetrock® Brand Gypsum Liner Panels 1" USG Sheetrock® Brand Gypsum Liner Panel USG steel J-runner USG corner reinforcement USG Sheetrock® Brand Gypsum Panels 1" USG Sheetrock® Brand Gypsum Panel or USG Sheetrock® Brand Mold Tough® Gypsum Liner Panel Wall Intersection Inside Corner USG steel J-runner Fasteners as required 24" o.c. USG Sheetrock® Brand Gypsum Panels 1" USG Sheetrock® Brand Gypsum Liner Panel Sealant USG steel J-runner USG corner reinforcement USG steel C-H stud USG Sheetrock® Brand Firecode® X Panels 1" USG Sheetrock® Brand Gypsum Liner Panel 1" USG Sheetrock® Brand Gypsum Liner Panel 1" USG Sheetrock® Brand Gypsum Liner Panel USG Shaft Wall Systems | 26 DESIGN DETAILS BASIC INTERFACES—SYSTEM B Outlet/Switch Box Control Joint in Two-Hour Shaft Walls USG Sheetrock® Brand Gypsum Panels Outlet box C-H stud 1" USG Sheetrock® Brand Gypsum Liner Panels USG steel J-runner 1 1 /4" 4" 1 /2" 5/8" USG Sheetrock® Brand Firecode® X Panels 5/8" USG Sheetrock® Brand Firecode® X Panels Control joint 1 5/8" Type S screws 1" USG Sheetrock® Brand Gypsum Liner Panels 1" Type S screws Stair Hanger and Rod Application Cross-Section at Stair Hanger 1" USG Sheetrock® Brand Gypsum Liner Panel Hanger rod Steel angle Stair landing Stair stringer Stairwell side USG Sheetrock® Brand Gypsum Panel USG steel C-H stud 24" o.c. Hanger rod 1" USG Sheetrock® Brand Gypsum Liner Panel l USG Sheetrock® Brand Gypsum Panel USG Shaft Wall Systems | 27 DESIGN DETAILS BASIC INTERFACES—SYSTEM B Handrail Application Steel Beam (UL System HW-D-0610) Steel plate (20 ga. min.) fastened to studs parallel to stringers as required USG Sheetrock® Brand Gypsum Panel 1" USG Sheetrock® Brand Gypsum Liner Panel USG steel J-runner attached to beam before fireproofing Power Steel beam with fireproofing -actuated fastener 24" o.c. USG Sheetrock® Brand Acoustical Sealant USG Sheetrock® Brand Gypsum Liner Panel USG Sheetrock® Brand Firecode® X Panels Steel Beam with Z-Clip (UL System HW-D-0609) Steel Beam with Offset (UL System HW-D-0611) Z-clip attached to beam before fireproofing Z-clip max. spacing 24" o.c. min. 20 ga. min. Two fasteners per leg USG steel J-runner USG steel C-H stud Fasteners Steel beam with fireproofing USG Sheetrock® Brand Firecode® X Panels USG Sheetrock® Brand Acoustical Sealant 1" USG Sheetrock® Brand Gypsum Liner Panel USG steel J-runner attached to beam before fireproofing Continuous 14 ga. steel plate 8" max.11/2" min. USG Sheetrock® Brand Acoustical Sealant Fasteners Steel beam with fireproofing 1" USG Sheetrock® Brand Gypsum Liner Panel USG Sheetrock® Brand Firecode® X Panels USG Shaft Wall Systems | 28 DESIGN DETAILS FIRE DAMPER Typical Duct Opening Penetration (See Damper and Duct Manufacturer Installation Instructions for Further Details) USG steel J-runner USG steel J-runner Duct opening B A USG steel E-studs or J-runners back-to-back Ceiling USG steel C-H studs Section A: Fire Damper Installation (See Damper and Duct Manufacturer Installation Instructions for Further Details) Section B: Fire Damper Installation (See Damper and Duct Manufacturer Installation Instructions for Further Details) 1 /2" x 1 /2" 16 ga. galvanized angle Damper sleeve 1 /2" max. USG Sheetrock® Brand Firecode® X Panels 1" USG Sheetrock® Brand Gypsum Liner Panel USG steel J-runner header 1 /2" x 1 /2" 16 ga. galvanized angle Damper sleeve 1 /2" max. USG steel J-runner USG Shaft Wall Systems | 29 DESIGN DETAILS ELEVATOR DOOR FRAMING Elevator Door Rough Opening USG steel J-runner USG steel J-runner 10' 0" max 10' 0" max USG steel J-runner USG steel J-runner header 5' 0" max. opening 20 ga. jamb strut 20 ga. jamb strutUSG steel J-runner USG steel J-runner USG steel J-runner Screw attached both sides Screw attached both sides Screw attached both sides A A USG C-H studUSG C-H stud 1" USG Sheetrock® Brand Gypsum Liner Panel USG jamb strut Section A-A Detail Fasten both sides of C-H stud to J runner 1" USG Sheetrock® Brand Gypsum Liner Panel Screw attach at bottom leg of C-H stud USG Sheetrock® Brand Firecode® X Panels Notes 1. Framing at elevator door shall be a minimum 4" studs and runners 20 gauge. 2. Horizontal placement of liner panel and C-H studs per UL Design U437. 3. Flanges of the jamb strut must be continuously braced by screw connections to the liner and face panels 12" o.c. 4. For doors greater than 5' wide and or transom heights greater than 4', reinforce the 400JS-34 with a nested 400ES-34. ELEVATOR DOOR FRAMING USG Shaft Wall Systems | 30 DESIGN DETAILS WALL SYSTEMS—C-H STUDS AND LINER PANELS INSTALLED HORIZONTALLY Horizontal Stud Shaftwall Section C-C Head Section USG steel J-runners USG steel J-runner header A A USG C-H studs USG Sheetrock® Brand Gypsum Liner Panels B B C C D D USG steel J-runner Structural member " USG Sheetrock® Brand Firecode® X Panels 1"USG Sheetrock® Brand Acoustical Sealant 1" USG Sheetrock® Brand Gypsum Liner Panel 5/8 Section B-B Wall Intersection Section D-D Base Section USG steel J-runner USG Sheetrock® Brand Acoustical Sealant Locate screws to avoid studs 3/8" J-runner to stud 1 /2" J-runner to panel USG steel C-H stud 5/8" USG Sheetrock® Brand Firecode® X Panels 1" USG Sheetrock® Brand Gypsum Liner Panels Sealant USG steel J-runner 1" USG Sheetrock® Brand Gypsum Liner Panel 5/8" USG Sheetrock® Brand Firecode® X Panels Structural member Note Horizontal framing shall be a minimum 4" C-H studs and runners 20 gauge. USG Shaft Wall Systems | 31 GOOD DESIGN PRACTICES Use this section as a reference if questions arise during the design or application of USG Shaft Wall Systems. This section is an overview of good design, application, installation and safety considerations that should be addressed when USG products and systems are used. This section outlines some major issues but is not intended to be comprehensive. We recommend that architects and contractors seek the assistance of safety professionals, especially at the construction site, because there are many factors to consider that are not included here. For more detailed information on safety and material handling, please refer to The Gypsum Construction Handbook. USG conducts tests on products and systems to meet performance requirements specified by various agencies. Upon written request we will provide test certification for published fire, sound, structural and other pertinent data covering systems designed and constructed according to our published specifications. Substitutions of any of the components are not recommended and are not supported by USG. Standards The following standards apply: ASTM C1396: Standard Specification for Gypsum Board ASTM C1658: Standard Specification for Glass-Mat Gypsum Panels ASTM C1325: Standard Specification for Non-Asbestos Fiber-Mat Reinforced Cementitious Backer Units ASTM C1278: Standard Specification for Fiber-Reinforced Gypsum Panel ASTM C840: Standard Specification for Application and Finishing of Gypsum Board ASTM C754: Standard Specification for Installation of Steel Framing Members to Receive Screw-Attached Gypsum Board, Backing Board, or Water-Resistant Backing Board ASTM C645: Standard Specification for Non-Load (Axial) Bearing Steel Studs, Runners (Track), and Rigid Furring Channels for Screw Application of Gypsum Board ASTM C475: Standard Specification for Joint Treatment Materials for Gypsum Wallboard Construction ASTM C1002: Standard Specification for Steel Drill Screws for the Application of Gypsum Board ASTM C1047: Standard Specification for Accessories for Gypsum Wallboard and Gypsum Veneer Base ASTM D3273: Standard Test Method for Resistance to Growth of Mold on the Surface of Interior Coatings in an Environmental Chamber Use fire test data to compare and select materials and assemblies, and to secure acceptance by the authority having jurisdiction. Fire-Resistant Assemblies (SA100) shows tested fire resistance for various systems. For assemblies tested at UL, ratings are specific to the designs tested and do not necessarily apply to alternate products or construction. For example, insulation may not be added to floor- or roof-ceiling assemblies, unless described in the UL design. Addition of insulation in the concealed space between the ceiling membrane and the floor or roof structure may reduce the hourly rating of an assembly by causing premature disruption of the ceiling membrane and/or higher temperatures on structural components under fire exposure conditions. Increasing the size or gauge of the stud (e.g., 2-1/2" C-H stud 25 gauge to 4" C-H stud 20 gauge) does not affect the fire resistance rating of the assembly. For more detailed information, refer to the system fire resistance Performance Selector on pages 14-16. 1 SYSTEM PERFORMANCE 2 FIRE RESISTANCE USG Shaft Wall Systems | 32 GOOD DESIGN PRACTICES Building structure supporting USG Shaft Wall System must be capable of withstanding the loads applied by shaft wall assemblies. Interior non-bearing partitions such as USG Shaft Wall are not designed to carry axial loads. Limiting heights are based on stress or deflection limits for lateral loads specified in the Performance Selector of this guide. Height limitations depend on the gauge of the steel used, dimensions of the stud, stud spacing and the allowable deflection limit. For limiting height tables, see page 18; for horizontal shaft wall span table, see page 22; and for limiting heights, unlined return air shafts, see page 20. Note: Size and gauge of the studs are specified in the limiting heights tables. Other sizes and gauges have not been evaluated for performance. Locating control joints is the responsibility of the design professional/architect. Integrate these suggestions with project conditions when determining specific locations for control joints. “Control joint” is a general term for methods used to minimize (not eliminate the potential for) cracking in partitions and ceilings. Specifically, a control joint minimizes cracking in the face of a partition or ceiling. At the perimeter of a partition or ceiling, it is called a perimeter relief joint. A control joint is effective in minimizing cracking caused by tensile or compressive movement in a membrane resulting from thermal, hygrometric and structural movement. Isolate shaft wall surfaces with control joints or other means where: • Construction changes within the plane of the shaft wall • Shaft wall run exceeds 30' • Expansion or control joints occur through the building itself • In stairwells at each floor level Ceiling-height door frames may be used as control joints. Less-than-ceiling-height door frames should have control joints extending to ceiling from both corners on both sides of the partition. Treat window openings in same manner as doors. Zinc control joints, when properly insulated and backed by gypsum panels, have been fire-endurance tested for use in one- and two-hour fire-rated walls. Proper installation of control joints in partitions and ceilings requires breaking the gypsum panels or lath behind the control joint. In ceiling construction, the framing should also be broken. In partitions, separate studs are used on each side of the joint with the runner track separated at that location. Where shaft walls enclose elevator and return air vents and intermittent pressures up to 15 psf are expected, USG Sheetrock® Brand Acoustical Sealant is recommended at intersections with floors, ceilings, columns, ducts, etc. to seal peripheries and penetrations and minimize whistling and dirt accumulation due to air movement. Sealant selection including joint treatment, surface coatings and details to seal the wall under these sustained pressures must be provided by the designer. See pages 16-17 for information on evaluating pressure loading and selecting the appropriate framing components based upon these design criteria. Shaft walls may be used for air handling with sustained pressures up to 10 psf. When air pressure exceeds 10 psf, air handling should be contained with a metal duct. See pages 18-19 for information about air handling and vent shaft enclosures. 3 STRUCTURAL CRITERIA 4 CONTROL JOINTS— BUILDING MOVEMENT 5 PRESSURE LOADS— MINIMIZING WIND NOISE 6 PRESSURE LOADS— AIR HANDLING USG Shaft Wall Systems | 33 GOOD DESIGN PRACTICES Penetrations of the shaft wall, such as door frames and duct openings, require additional reinforcement at corners to distribute concentrated stresses if a control joint is not used. Penetrations greater than 48" wide require supplemental support for the shaft wall at the opening. Where there are access panels or large duct penetrations, pressure loads, headers, sills and adjacent channels may require reinforcing to properly distribute these loads. Use sound test data to compare and select materials and constructions. These data frequently are essential for securing compliance by the agency having jurisdiction. See Acoustical Assemblies (SA200) for acoustical performance. Sound control refers to the ability to attenuate sound passing through a partition. The STC is a widely used rating of sound attenuation performance. It is relatively accurate for speech sounds but not for music, mechanical equipment noise or any sound with substantial low-frequency energy. It is tested per ASTM E90 and rated per ASTM E413. See the Performance Selector for the STC ratings for USG Shaft Wall Systems. Sound tests are conducted under ideal laboratory conditions per ASTM procedures. USG products are assembled in a specific manner to meet the requirements of these ASTM procedures. Substitution of materials other than those tested or deviation from the specified construction may adversely affect performance. Field performance depends on building design and careful attention to detailing and workmanship. Where these partitions are used for sound control, seal the partition perimeter with 1/4" min. round bead of USG Sheetrock® Brand Acoustical Sealant. Seal around all penetrations. Understanding water and mold and its impact on the construction process and building materials are integral to good design and construction practices. USG offers references and additional sources that reinforce good design, construction and maintenance practices. These practices are generally recognized as necessary to minimize moisture- related problems and the growth of mold in a building environment. If you have additional questions, please contact those sources or USG. The best way to address mold is to make sure that building materials do not get wet before and during installation and are not exposed to moisture inside the finished building. See Moisture/Mold in the Performance Testing section for more information. Flashing and sealants as shown in the construction documents and as selected by the architect and/or structural engineer should be provided to resist air and water infiltration. The flashing and sealants selected shall be installed in a workmanlike manner in appropriate locations to maintain continuity of air/water barriers, particularly at windows, doors and other penetrations of exterior wall. Water vapor control must always be considered in the design of exterior wall systems. Humidity and temperature conditions may require the installation of a vapor retarder to prevent moisture condensation within the wall and the resulting damage. To determine the necessity and location of vapor retarders, a water vapor transmission and dew point analysis of the layered wall assembly should be conducted by a qualified engineer. 7 PENETRATIONS 8 SOUND CONTROL 9 MOISTURE AND MOLD 10 AIR AND WATER INFILTRATION 11 VAPOR RETARDERS USG Shaft Wall Systems | 34 GOOD DESIGN PRACTICES Gypsum Panels: Protect all gypsum products from exposure to excessive or continuous moisture and the elements before, during and after installation. Eliminate sources of moisture immediately. Metal Framing Protection: Give light-gauge metal components such as steel studs and runners, furring channels and resilient channels adequate protection in the warehouse and on the job site against rusting caused by moisture. In marine areas such as the Caribbean, Florida and the Gulf Coast where chloride and sea salt are present in combination with excessively high humidity, use of components that offer increased protection against corrosion is recommended. Call-Button Floor Indicator and Electric Boxes: Shaft walls will accommodate outlet boxes with depths up to the stud width. See page 25 for details. Framing Attachment: Runners and studs attached to beams or columns may need to be installed before steel is spray- fireproofed. Excess fireproofing should be removed from runners and studs before installing shaft wall liner and sealant. USG Sheetrock® Brand Gypsum Liner Panel Application—Butt Joints: When an installation of USG Shaft Wall height exceeds maximum available panel length, it is necessary to incorporate a butt joint between two liner panels. Stagger butt joints in adjacent panels top and bottom to prevent a continuous horizontal joint. Joint should be located in top or bottom third of wall. Horizontal joints need not be backed by steel framing to maintain the fire rating of the assembly. Painting products and systems should be used that comply with recommendations and requirements in appendices of ASTM C840. For priming and decorating with paint, texture or wall covering, follow manufacturer’s directions. All surfaces, including applied joint compound, must be thoroughly dry, dust-free and not glossy. Prime with USG Sheetrock® Brand First Coat™ Primer or with an undiluted, interior latex flat paint with high-solids content. Allow to dry before decorating. To improve fastener concealment, where gypsum panel walls and ceilings will be subjected to severe artificial or natural side lighting and decorated with a gloss paint (eggshell, semigloss or gloss), the gypsum panel surface should be skim coated with joint compound to equalize suction and texture differences between the drywall face paper and the finished joint compound before painting. USG Sheetrock® Brand Tuff-Hide™ Primer-Surfacer skims and primes in a single application. USG Durock™ Brand Fasteners for Steel Framing: USG Durock™ Brand Tile Backer Screws for steel framing Type G screws; 1-5/8", 1-1/4". USG Fiberock® Panel Fasteners for Steel Framing: Use corrosion-resistant Type S-12 buglehead screws for 20-12 ga. steel framing. When using 20 ga. steel framing, fasteners should be spaced no greater than 8" o.c. Fasteners must be of sufficient length to ensure a minimum of 3/8" penetration into steel framing. Ordered separately, should be at least 16 ga. steel, shop primed and have throats accurately formed to overall thickness of the shaft wall plus 3/32" minimum. They should be anchored at floor with 16 ga. steel plates welded to trim flanges, with provision for two power-driven anchors or equal per plate. Jamb anchors should be 18 ga. steel welded in jamb and screw-attached to anchors. USG reserves the right to make changes or improvements in the design of all catalogued items without notice and without obligation to incorporate these changes or improvements in items already manufactured. 12 PRODUCT HANDLING AND STORAGE 13 APPLICATION 14 PAINTING SYSTEMS 15 SCREWS 16 STEEL DOOR FRAMES USG Shaft Wall Systems | 35 APPLICATION GUIDE SPECIFICATIONS This guide specification is provided to assist you in specification of USG Shaft Wall Systems. If you have additional questions or would like more information regarding this or other USG products and systems, please contact USG at 800 USG.4YOU (874-4968) or visit usgdesignstudio.com PART 1: GENERAL Drawings and general provisions of the project contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section. USG System Folder SA926—USG Shaft Wall Systems. Specify the appropriate USG Shaft Wall System to meet project requirements for fire resistance, structural performance, sound control and aesthetics. A. This section includes the following USG Shaft Wall Systems 1. Vertical shaft enclosures 2. Stair enclosures 3. Horizontal assemblies 4. Vent shaft enclosures B. Related Sections: 1. Division 9 USG Sheetrock® Brand Gypsum Panels and assemblies 2. Division 9 USG Imperial® Gypsum Base and Veneer Plaster Assemblies A. Shaft Wall: An assembly of steel framing, gypsum boards and other materials used to enclose elevator shafts, stairways, air shafts and mechanical components. B. Gypsum Board Construction Terminology: Refer to ASTM C11 for definition of terms for gypsum board construction not defined in this document. A. The systems are UL Listed for fire resistance. B. System fire-resistance testing with elevator door manufacturer at UL. C. Fire resistance tested penetration details for call-button boxes and position indicators. D. Oscillation tested to 1 million cycles to ensure performance of the life of the building. E. UL Listed fire damper application. F. Air Pressure Loads—Select based on project requirements. See details in this brochure for USG Shaft Wall System data. G. Deflection Limit—Select based on project requirements. See details in this brochure for USG Shaft Wall System data. H. STC Rating—Select based on project requirements. I. Hardened Shafts—Where required by code, for buildings classified as high-rise buildings, special provisions may be required. A. Product and System Data—Submit USG System Folder SA926, which can be downloaded at usg.com. B. Submit certification of manufacturer compliance with fire and sound requirements indicated. C. Fire-rating compliance shall include verification of compatibility with labeled elevator door frame installation and test verification of call box and similar penetrations. 1.1 RELATED DOCUMENTS 1.2 SCOPE 1.3 SUMMARY 1.4 DEFINITIONS 1.5 PERFORMANCE REQUIREMENTS 1.6 SUBMITTALS USG Shaft Wall Systems | 36 APPLICATION GUIDE SPECIFICATIONS A. Deliver materials in their original unopened packages bearing manufacturer identification. B. Protect materials from wetting and damage from weather, direct sunlight, surface contamination, corrosion, construction traffic and other causes. C. Warning: Store all USG Sheetrock® Brand Gypsum Panels flat. Panels are heavy and can fall over, causing serious injury or death. Do not move unless authorized. A. All materials shall be suitably protected from the weather during installation to prevent damage to the shaft wall. B. Install gypsum panels following environmental conditions, room temperatures and ventilation specified in The Gypsum Construction Handbook. A. Protect USG Shaft Wall System and components from moisture before, during and after installation. Eliminate sources of moisture immediately. B. Fire-Resistance-Rated Assemblies: Provide UL Design Number (e.g., U415) for basic systems. C. Sound-Rated Assemblies (STC)—Provide sound-rated system whose materials and construction comply with requirements of ASTM E90 and are classified according to ASTM E413 by a qualified testing agency. D. Preinstallation Conference—Conduct conference at project site. Review methods and procedures for work related to USG Shaft Wall System assemblies. PART 2: PRODUCTS A. Supply materials manufactured by or for the United States Gypsum Company that comply with requirements of fire resistance-rated assemblies indicated in USG System Folder SA926. B. Basis of Design—USG Shaft Wall System A. Gypsum Liner Panels—ASTM C1396, 1" USG Sheetrock® Brand Gypsum Liner Panels, 100% recycled green face and back paper, beveled edge, 24" wide, lengths as required. Stamped with UL Classification label documenting UL Classifications for fire resistance, surface burning characteristics and noncombustibility. Panels should also be identified with the following language: “USG Sheetrock® Brand Gypsum Liner Panel, a Component of United States Gypsum Company Fire-Rated Systems.” B. USG Sheetrock® Brand Mold Tough® Gypsum Liner Panels—ASTM C1396, 1" USG Sheetrock® Brand Mold Tough® Gypsum Liner Panels, 100% recycled blue face and back paper, beveled edge, 24" wide, lengths as required. Stamped with UL Classification label documenting UL Classifications for fire resistance, surface burning characteristics and noncombustibility. Panels should also be identified with the following language: “USG Sheetrock® Brand Mold Tough® Gypsum Liner Panel, a Component of United States Gypsum Company Fire-Rated Systems.” C. USG Sheetrock® Brand Glass-Mat Liner Panels—ASTM C1658, 1" USG Sheetrock® Brand Glass-Mat Liner Panels, moisture- and mold-resistant gypsum core encased in a moisture- and mold-resistant glass mat on both sides, 24" wide, lengths as required. Stamped with UL Classification label documenting UL Classifications for fire resistance, surface burning characteristics and noncombustibility. Panels should also be identified with the following language: “USG Sheetrock® Brand Glass-Mat Liner Panel, a Component of United States Gypsum Company Fire-Rated Systems.” D. Gypsum Wallboard—ASTM C1396, (1/2") (5/8") (3/4") (select thickness), 4' wide, tapered edge, USG Sheetrock® Brand Gypsum Panels, (Firecode® X) (Firecode® C) (Ultracode® Core) (Mold Tough® Firecode® X), ASTM C1287 (USG Fiberock® Aqua-Tough™ Interior Panels) (USG Fiberock® Abuse-Resistant Interior Panels) (select core type), lengths as required. Identified with UL Classification label. 1.7 DELIVERY, STORAGE AND HANDLING OF MATERIALS 1.8 PROJECT CONDITIONS 1.9 QUALITY ASSURANCE 2.1 MANUFACTURER 2.2 MATERIALS USG Shaft Wall Systems | 37 APPLICATION GUIDE SPECIFICATIONS E. Gypsum Base for Gypsum Veneer Plaster—ASTM C1396, (1/2") (5/8") (select thickness), 4' wide, USG Imperial® Gypsum Base (Firecode® X) (Firecode® C) (select core type), lengths as required. F. Cement Board—ASTM C1325, USG Durock® Brand Cement Board, 1/2" and 5/8" thickness, 48" width x 96" length. G. Gypsum Wallboard and Gypsum Base Joint Treatment Materials—Select a USG Interior Finishing System H. Fasteners—ASTM C1002, Screws: (3/8") (1/2") Type (S) (S-12) pan head; 5/8" Type S-12 low profile head; (1") (1-5/8") (2-1/4") Type S bugle head. USG Durock™ Brand Tile Backer Screws for steel framing: 1-5/8". Type G screws: 1-1/2". I. Metal Trim—ASTM C1047, No. (200A) (200B) (401) (402) (701B) (801B). J. USG Sheetrock® Brand Paper-Faced Metal Corner Bead and Trim. K. Steel furring channels. L. RC-1 resilient channels or equivalent. M. USG steel C-H studs, (212CH-18) (212CH-34) (400CH-18) (400CH-34) (600CH-34) hot-dipped galvanized, lengths as required (select from tables). N. USG steel E-studs, (400ES-34) (600ES-34) hot-dipped galvanized, lengths as required (select from tables). O. USG steel J-runners, (212JR-23) (400JR-23) (600JR-23) (212JR-34) (400JR-34) (600JR-34) hot-dipped galvanized. P. Steel angle clips 20 gauge, (2" x 2" x 2") (2" x 2" x 4") (horizontal shaft wall only). Q. USG steel jamb struts, (212JS-34) (400JS-34) (600JS-34) hot-dipped galvanized. R. Runner fasteners, power-driven type, to withstand required single shear and bearing force when driven through structural head or base and without exceeding allowable design stress in runner, fastener or structural support (obtain locally). S. USG Sheetrock® Brand Acoustical Sealant. T. Sound batts—(1") (1-1/2") (3"). U. Zinc control joint #093. PART 3: EXECUTION Examine substrates and abutting assemblies with installer present. Proceed with installation after conditions determined to be satisfactory. A. Check that system components are available to construct USG Shaft Wall System • USG Sheetrock® Brand Gypsum Liner Panels • USG Sheetrock® Brand Mold Tough® Gypsum Liner Panels • USG Sheetrock® Brand Glass-Mat Liner Panels • USG Sheetrock® Brand Firecode® X, Firecode® C, Ultracode® Core Panels • USG Sheetrock® Brand Mold Tough® Firecode® X, Firecode® C or Ultracode® Core Panels • USG Durock® Brand Cement Board • USG Fiberock® Abuse-Resistant Interior Panels • USG Fiberock® Aqua-Tough™ Interior Panels • USG Imperial® Gypsum Base, Firecode® X or Firecode® C • USG steel framing components (C-H studs, J-runner, E-studs, jamb struts) B. Other fire-resistive elements/materials: Coordinate installation of USG Shaft Wall assembly with sprayed fire-resistive materials and other fire-resistive elements so both elements remain complete and undamaged. 2.2 MATERIALS CONT. 3.1 EXAMINATION 3.2 PREPARATION USG Shaft Wall Systems | 38 APPLICATION GUIDE SPECIFICATIONS A. USG Steel Framing and USG Sheetrock® Brand Gypsum Liner Panels 1. Position steel J-runners at floor and ceiling with the short leg toward finish side of wall. 2. Securely attach runners to structural supports with powder-actuated fasteners at both ends and max. 24" o.c. 3. For attachment to steel frame construction, install floor and ceiling J-runners and J-runners or E-studs on columns and beams before steel is fireproofed. 4. For attachment to structural steel, use Z-shaped stand-off clips secured to structural steel before fireproofing application. 5. Remove spray-fireproofing from J-runners and E-studs before installing gypsum liner panels. 6. For wall heights less than maximum available panel height, cut gypsum liner panels no more than 1" less than floor-to-ceiling height and erect vertically between J-runners. 7. Where shaft wall height shaft exceeds maximum available panel length, pieces of gypsum liner panel must be butted together at factory-cut ends. a. Position gypsum liner panel end joints within upper and lower third points of wall. b. Stagger joints top and bottom in adjacent panels. c. Screw studs to runners on walls over 16'. 8. Cut C-H studs 3/8" to not more than 1/2" less than floor-to-ceiling height. 9. Install C-H studs between gypsum liner panels with liner securely engaged. 10. Terminations: Install full-length steel E-studs or J-runners vertically at T-intersections, corners, door jambs and columns. 11. Openings: Frame with vertical E-stud or J-runner at vertical edges, horizontal J-runner at head and sill. Reinforce as shown in this brochure. Suitably frame all openings to maintain structural support for wall. 12. Elevator Door Frames: Install jamb struts each side of elevator door frames to act as strut-studs. 13. Steel Hinged Door Frames: Install floor-to-ceiling steel E-studs each side to act as strut-studs. 14. Attach strut-stud (see 3.2.A.12 or 3.2.A.13) to floor and ceiling runners with two 3/8" Type S-12 pan head screws. Attach strut-studs to jamb anchors with 1/2" Type S-12 screws. Over steel doors, install a cut-to-length section of J-Runner and attach to strut-studs with 3/8" Type S-12 screws. B. Resilient Channels 1. Install resilient channels (RC-1 or equivalent) horizontally to face of studs, within 6" of floor and ceiling. 2. Apply resilient channels a maximum of 24" o.c. vertically (with open face up). 3. Attach resilient channels to studs with 3/8" Type S screws driven through holes in mounting flange. 4. Splice channel by nesting directly over stud; screw-attach through both flanges. Reinforce with screws at both ends of splice. 5. Install 1/2" x 3" wide continuous gypsum filler strips to top and bottom runner. 6. Gypsum panel application with resilient channel: Apply base layer horizontally to resilient channels with end joints staggered. Fasten with 1" Type S screws 12" o.c. Apply face layer vertically with joints staggered; attach to channels with 1-5/8" Type S screws 12" o.c. C. USG Sheetrock® Brand Gypsum Panels Gypsum panels and fastening must be per the corresponding fire-resistance design number that is the basis of design. See the Performance Selector in this brochure for specific fire-resistance design numbers. The system references below correspond to the Performance Selector found on pages 14-16. 3.3 SHAFT WALL INSTALLATION USG Shaft Wall Systems | 39 APPLICATION GUIDE SPECIFICATIONS Per UL Design U415, USG Sheetrock® Brand Gypsum Panels may be applied vertically or horizontally in all of the systems below, except System F. Please note appropriate fastener spacing. System A—U415 or U469, one-hour fire-resistance rating. Apply one layer 5/8" USG Sheetrock® Brand Firecode® X Panels to studs and runners with 1" Type S or S-12 (typical) screws. Fastener spacing – Space screws 12" o.c. for vertical panel application, 8" o.c. for horizontal panel application. System B—U415 or U438, two-hour fire-resistance rating. Apply two layers of 1/2" USG Sheetrock® Brand Firecode® C Panels. Apply base layer to studs with 1" Type S or S-12 (typical) screws. Space screws 24" o.c. along edges and in the field of the panels for vertical application, 16" o.c. for horizontal application. Apply face layer to studs and J-runners with 1-5/8" Type S or S-12 (typical) screws. Space screws 12" along the edges and in the field when applied vertically, 8" o.c. when applied horizontally. Stagger all joints between base and face layers. System D—U415 or U459, two-hour fire-resistance rating. Install 1-1/2" Thermafiber® SAFB mineral wool batts in stud cavity. Apply base layer of 5/8" USG Sheetrock® Brand Firecode® C Panels using 1" Type S or S-12 (typical) screws spaced 24" o.c. when board is applied vertically. Space screws 16" o.c. when board is applied horizontally. Apply face layer of 1/2" USG Durock® Brand Cement Board to C-H studs with 1-5/8" USG Durock™ Tile Backer Screws spaced 8" o.c. System E—U415 or U467, two-hour fire-resistance rating. Apply one layer 1/2" USG Sheetrock® Brand Firecode® C Panels to both sides of C-H studs. Fasten with 1" Type S or S-12 (typical) screws. Space screws 12" o.c. along the edges and in the field for vertical panel application, 8" o.c. for horizontal. System F—U415, two-hour fire-resistance rating. Apply base layer 1/2" USG Sheetrock® Brand Firecode® C Panels to resilient channels with 1" Type S or S-12 (typical) screws spaced 24" o.c. Stagger end joints. Apply face layer 1/2" USG Sheetrock® Brand Firecode® C Panels with 1-5/8" Type S or S-12 (typical) screws spaced 12" o.c. System G —U415, three-hour fire-resistance rating. Apply two layers of 5/8" USG Sheetrock® Brand Firecode® C Panels using Type S or S-12 (typical) screws spaced 12" o.c. Apply first and second (inner) layers vertically or horizontally over room side of steel C-H studs. When applied vertically, center joints between panels over studs. Stagger all joints a minimum 24". When panels are applied horizontally, stagger joints a minimum 12". Apply third layer of 5/8" USG Sheetrock® Brand Firecode® C Panels vertically or horizontally over room side of steel C-H studs using 2-1/4" Type S or S-12 (typical) screws. Space screws 16" o.c. when board is applied vertically, 12" o.c. when board is applied horizontally. System H—U415, three-hour fire-resistance rating. Alternate to System G above. Apply third layer of 5/8" USG Sheetrock® Brand Firecode® C Panels to other side of steel C-H studs. Horizontal Assemblies—Two-hour fire-resistance rating. Install three layers of 1/2" USG Sheetrock® Brand Firecode® C Panels to horizontally installed C-H and/or E-studs. Apply the base layer with 1" Type S or S-12 (typical) screws spaced 24" o.c. Apply the mid-layer in the same manner with joints offset 2' and attached with 1-5/8" Type S or S-12 (typical) screws spaced 12" o.c. Apply the face layer attached with 2-1/4" Type S or S-12 (typical) screws spaced 12" o.c. Place face layer end joints between studs and secure with 1-1/2" Type G screws 8" o.c. Horizontal Stud Shaft Wall 1. Attach horizontal J-runners at the floor and top of wall and vertical J-runners to structural supporting elements with powder-actuated fasteners located not greater than 2" from ends and spaced no more than 24" on center with short leg of J-runner toward the finish side of the wall. 2. Install gypsum liner panels horizontally without butt joints, which limits the width of the wall to the available length of the liner panels. 3. Cut gypsum liner panels 1" less than the width of the wall, and center the panels between the vertical J-runners. The top edge of the uppermost liner panel to be cut 1" less than the wall height to clear the 1" leg of the top J-runner. 3.3 SHAFT WALL INSTALLATION CONT. USG Shaft Wall Systems | 40 APPLICATION GUIDE SPECIFICATIONS 4. Free edge of the uppermost and lower liner panels attached to the long leg of the top and bottom J-runners with 1-5/8" long Type S or S-12 steel screws spaced no greater than 12" on centers. 5. Cut C-H studs to maintain a 1/4" gap at each end of the wall. 6. Install C-H studs horizontally with the open “C” section of the studs facing down and spaced 24" o.c. 7. Steel angles should be minimum 20 gauge, 2" x 2" x 2" for 4 C-H studs, and 2" x 2" x 4" for 6 C-H studs. Clips are centered under and tight to the web of the C-H studs, but not attached to the studs. Clips are attached through the web of the vertical J-runners to the underlying structural supporting element with a minimum of two 1/2" Type S-12 pan head screws. 8. As an alternative to the preceding angle clip, fasten each end of the horizontal C-H stud to the vertical J-runner legs with 1/2" Type S-12 pan-head steel screws on both sides of the wall. 9. End reactions of the horizontal C-H studs must be accommodated by the structural element required at the ends of the wall, and must be determined by a licensed professional engineer. 10. The allowable height of the wall is predicated on the structural adequacy of the vertical structural elements. D. USG Sheetrock® Brand Gypsum Panels (for vertical and horizontal shaft walls) Vent Shaft Enclosure —U529, two-hour fire-resistance rating. Install 1" x 2" x 25" ga. galvanized steel angles as runners on floor, ceilings and partition ends. Fasten runners or angles securely to structure with suitable fasteners spaced 24" o.c. max. Install 1/2" USG Sheetrock® Brand Firecode® C Panels vertically. Fasten to angles with 1" Type S or S-12 (typical) screws spaced 12" o.c. Apply USG Sheetrock® Brand Durabond® Setting-Type Joint Compound or USG Sheetrock® Brand Easy Sand™ Lightweight Setting-Type Joint Compound on back side of liner panel and sheet-laminate to shaft-side board with vertical joints offset 12" from inner board joints. Also screw to shaft-side board with 1-1/2" long Type G screws spaced 24" o.c. in both directions. Laminate face board to liner panels in similar manner. Install face boards vertically with joints offset 12" from liner panel joints. Apply pressure when placing boards to ensure good adhesive bond and fasten to liner panel with 1-1/2" Type G screws, spaced 24" o.c. A. Gypsum Panel Joints—Finish all face layer joints and internal angles with a USG Sheetrock® Brand interior finishing system installed according to manufacturer’s directions. B. Corner Bead—Reinforce all vertical and horizontal exterior corners with USG Sheetrock® Brand Paper-Faced Metal Corner Bead. C. Metal Trim—Where shaft wall terminates against masonry or other dissimilar material, apply USG Sheetrock® Brand Paper-Faced Metal Corner Bead and Trim over face layer edge. 3.3 SHAFT WALL INSTALLATION CONT. 3.4 ACCESSORY APPLICATION USG Shaft Wall Systems | 41 PRODUCT INFORMATION See usg.com for the most up-to-date product information. NOTE Products described here may not be available in all geographic markets. Consult your USG Company sales office or representative for information. NOTICE We shall not be liable for incidental or consequential damages, directly or indirectly sustained, nor for any loss caused by application of these goods not in accordance with current printed instruction or for other than the intended use. Our liability is expressly limited to replacement of defective goods. Any claim shall be deemed waived unless made in writing to us within thirty (30) days from date it was or reasonably should have been discovered. SAFETY FIRST! Follow good safety/industrial hygiene practices during installation. Wear appropriate personal protective equipment. Read Safety Data Sheets and literature before specification and installation. To place an order or for more information on the USG Shaft Wall and Area Separation Wall framing components, contact a licensed USG manufacturer and distributor. CEMCO 800 775-2362 cemcosteel.com EB Metals 855 932-6382 ebmetal.us Steel Structural Products 812 670-4195 steelstructuralproducts.com CONTACT INFORMATION Manufactured by United States Gypsum Company 550 West Adams Street Chicago, IL 60661 CUSTOMER SERVICE 800 950-3839 TECHNICAL SERVICE 800 USG.4YOU (874-4968) WEBSITES usg.com usgdesignstudio.com SA926-USA-ENG/rev. 2-17 © 2017 USG Corporation and/or its affiliates. All rights reserved. The trademarks USG, AQUA-TOUGH, DURABOND, DUROCK, EASY SAND, FIBEROCK, FIRECODE, FIRST COAT, IMPERIAL, MOLD TOUGH, PLUS 3, SHEETROCK, TUFF-HIDE, ULTRACODE, IT’S YOUR WORLD. BUILD IT., the USG logo, the design elements and colors, and related marks are trademarks of USG Corporation or its affiliates. The trademarks TYPE S, S-12, and related marks are trademarks of ITW Buildex or its affiliates. The trademarks THERMAFIBER, and related marks are trademarks of Thermafiber LLC. or its affiliates.