Life safety assurance for modern building designs. Shaft Wall. Systems

Transcription

1 Life safety assurance for moern builing esigns Shaft Wall Systems

2 Walls that enclose elevator shafts, stairwells an other vertical shafts are the lifeline of a builing. Shoul a fire occur, firefighters control the use of elevators, leaving stairwells as the only means for occupant egress or rescue within the builing. Since these walls are an important part of the builing, they must have the strength to withstan lateral loas an provie neee fire protection. High-Performance Shaft Walls

3 User s Guie This brochure explains: What a shaft wall system comprises The ifferent applications where shaft wall systems can be use How to select an specify the appropriate components of a shaft wall system Pages Unerstan Your System 4 Overview Applications Components Performance Testing Select Your System Performance Selector 14 Limiting Heights Soli Shaft Wall Limiting Spans Design Your System Design Details 23 Goo Design Practices Specify Your System 36 Application Guie Specifications For More Information Technical Service 800 USG.4YOU Websites usg.com usgesignstuio.com 3 USG Shaft Wall Systems

4 Overview USG shaft wall systems are non-loabearing gypsum wall partition assemblies constructe from outsie the shaft at each floor. Shafts are enclose early in construction, an the walls are finishe later, along with interior partitions. Installation is quick an easy, using components an application proceures familiar to rywall contractors. This system installs faster than other multilayer gypsum panel systems because it is installe from one sie, leaving the shaft free of scaffoling. The assemblies are constructe of gypsum liner panels friction-fitte into C-H stus in a progressive manner, with gypsum panels, gypsum fiber panels or cement boar applie to the face. Typical Shaft Wall Assembly Utility chase USG C-H stu 1" Bran Gypsum Liner Panels 1" Bran Mol Tough Liner Panels 1" Bran Glass-Mat Liner Panels USG J-runner Two USG Jamb Struts 1" Bran Gypsum Liner Panels USG C-H stu Bran Gypsum Panels Bran Gypsum Panels Elevator shaft Elevator shaft oor frame Elevator car 4 USG Shaft Wall Systems

5 Applications Use USG shaft wall systems to construct elevator shafts, mechanical shafts, stairwells, air return shafts an horizontal membranes. These shafts are vital for vertical communication, power, water, fresh air, exhaust an a means of egres. Walls Intermittent Air Pressure Loas Elevator shafts Ieal for elevator shafts since the walls can be constructe from one sie, leaving the shaft free of scaffoling. This allows elevator equipment to be installe simultaneously. Stair shafts Accommoates stair shafts by allowing both sies of the wall to be finishe when require. For ae abuse resistance in stairwells, face layer panels can be substitute with Bran Mol Tough AR Firecoe Core, Bran Mol Tough VHI Firecoe Core or USG Fiberock Bran Abuse-Resistant Interior Panels. Intermittent Air Pressure Loas Sustaine Pressure Loas Mechanical shafts Vertical HVAC piping an uctwork can easily be containe within the system, as well as allowing for wall penetrations when require. Air shafts (unline) The system can also be use for vertical air shafts within the builing. Shafts can be unline when specific conitions are met. Unline shaft walls can accommoate sustaine air pressure up to 10 psf. See page 20 for more information. 5 USG Shaft Wall Systems

6 Applications Walls Soli Shafts Horizontal Stu Shafts Soli shafts are normally use to construct mechanical or uct enclosures, or in areas where a small section of shaft wall is neee for a single vertical pipe penetration. See page 21 for more information. For certain applications, equipment limitations sometimes make it ifficult to install shaft liner panels an stus vertically. This is true for walls separating shafts when there is only a structural beam provie for supporting the wall. Ceilings Shaft Wall Ceiling Membrane The 2-hr. horizontal membrane (also use in 2-hr. uct enclosures), an the membranes use as the ceiling of 1- an 2-hr. egress corriors, are shown on page 23. When the span of the 2-hr. horizontal membrane is greater than 5'-4", use UL Design K504, per etails on page USG Shaft Wall Systems

7 Components USG shaft wall systems have been comprehensively teste for fire resistance ratings only when all of the system components are use together. Substitutions of any of the components are not recommene an are not supporte by USG. Refer to the appropriate prouct material safety ata sheet for complete health an safety information. Gypsum Liner Panels Bran Gypsum Liner Panels High-performance panel has a noncombustible core encase in a water-resistant 100% recycle green face an back paper Unerwriters Laboratories (UL)/Unerwriters Laboratories Canaa (ULC) Classifie for fire resistance Panel is 1" thick an 24" wie with bevele eges Refer to prouct submittal sheet WB2278 for more information Bran Mol Tough Gypsum Liner Panels High-performance panel has a noncombustible an moisture- an mol-resistant gypsum core enclose in a moisture- an mol-resistant, 100% recycle blue face an back paper UL/ULC Classifie as to fire resistance Panel is 1" thick an 24" wie with bevele eges Refer to prouct submittal sheet WB2389 for more information Bran Glass-Mat Liner Panels High-performance panel has a noncombustible an moisture- an mol-resistant gypsum core enclose in a moisture- an mol-resistant glass mat on both sies Can be left expose for up to 12 months UL/ULC classifie as to fire resistance Panel is 1" thick an 24" wie with bevele eges Refer to prouct submittal sheet WB2483 for more information Gypsum Panels an Cement Boar Bran Firecoe Core Gypsum Panels All of the avantages of regular panel with aitional resistance to fire Available in 5/8" thickness, 4' with Refer to prouct submittal sheet WB1473 for more information Bran UltraLight Panels Firecoe X Gypsum Panels All of the avantages of Bran Firecoe Core (Type X) Gypsum Panels 15% less weight makes it easier to transport, hanle an install Available in 5/8" thickness, 4' with Refer to prouct submittal sheet WB2598 for more information Bran Firecoe C Core Gypsum Panels Provie improve fire resistance over stanar Firecoe panels because of aitives that enhance integrity of the core uner fire exposure Available in 5/8" an 1/2" thicknesses, 4' with Refer to prouct submittal sheet WB1473 for more information 7 USG Shaft Wall Systems

8 Components Bran Mol Tough Firecoe Core Gypsum Panels Panel has a noncombustible, moisture- an mol-resistant gypsum core encase in a moisture- an mol-resistant, 100% recycle green face an brown back paper Tapere long eges for easy finishing Available in 5/8" thickness, 4' with 5/8" panel is UL Classifie for fire resistance Refer to prouct submittal sheet WB2390 for more information Bran Mol Tough VHI Firecoe Core Gypsum Panels Panel has a noncombustible, moisture- an mol-resistant gypsum core encase in a moisture- an mol-resistant, 100% recycle green face an brown back paper Tapere long eges for easy finishing Available in 5/8" thickness, 4' with 5/8" panel is UL Classifie for fire resistance Core is reinforce with a high-strength mesh for heavy-uty impact-resistance Meet Level 3 performance per ASTM C1629, soft- an har-boy impact resistance Refer to prouct submittal sheet WB2529 for more information Bran Mol Tough AR Firecoe Core Gypsum Panels Panel has a noncombustible, moisture- an mol-resistant gypsum core encase in a moisture- an mol-resistant, 100% recycle green face an brown back paper Tapere long eges for easy finishing Available in 5/8" thickness, 4' with 5/8" panel is UL Classifie for fire resistance Manufacture for greater abuse resistance than stanar 5/8" gypsum panels Meet Level 2 performance per ASTM C1629, soft- an har-boy impact resistance Refer to prouct submittal sheet WB2391 for more information Bran Glass-Mat Panels Mol Tough Firecoe X Panel has a noncombustible, moisture- an mol-resistant gypsum core encase in a moisture- an mol-resistant, fiberglass mat Tapere long eges for easy finishing Available in 5/8" thickness, 4' with 5/8" panel is UL Classifie for fire resistance Suitable for use in pre ry-in (aka pre-rock ) an similar applications of wallboar before the builing envelop is fully enclose Can be expose to weather up to 12 months Refer to prouct submittal sheet WB2560 for more information Bran Glass-Mat Panels Mol Tough AR Panel has a noncombustible, moisture- an mol-resistant gypsum core encase in a moisture- an mol-resistant, fiberglass mat Provie greater abuse resistance compare to stanar rywall Resist surface abrasion, inentation an soft-boy impact Suitable for use in pre ry-in (aka pre-rock ) an similar applications of wallboar before the builing envelope is fully enclose Available in 5/8" thickness, 4' with Can be expose to weather up to 12 months UL Classifie as to fire resistance, surface-burning characteristics an noncombustibility Refer to prouct submittal sheet WB2750 for more information 8 USG Shaft Wall Systems

9 Components Bran Glass-Mat Panels Mol Tough VHI Panel has a noncombustible, moisture- an mol-resistant gypsum core encase in a moisture- an mol-resistant, fiberglass mat Provie superior impact resistance an are an upgrae to abuse-resistant panels Meet ASTM C1629 Level 3 (highest) for har- an soft-boy impact Suitable for use in pre ry-in (aka pre-rock ) an similar applications of wallboar before the builing envelope is fully enclose Available in 5/8" thickness, 4' with Can be expose to weather up to 12 months UL Classifie as to fire resistance, surface-burning characteristics an noncombustibility Refer to prouct submittal sheet WB2749 for more information Bran Ultracoe Core Gypsum Panels 3/4" thick panel can achieve a two-hour fire rating with single-layer construction when use with mineral wool insulation in steel frame walls Available in 4' with Refer to prouct submittal sheet WB2167 for more information Bran Mol Tough Ultracoe Core Gypsum Panels 3/4" thick panel can achieve a two-hour fire rating with single-layer construction when use with mineral wool insulation in steel frame walls Panel has a noncombustible moisture- an mol-resistant gypsum core encase in moisture- an molresistant green face an brown back paper UL Classifie as to fire resistance, surface-burning characteristics an noncombustibility Refer to prouct submittal sheet WB2388 for more information USG Durock Bran Cement Boar Water-urable, mol-resistant substrate for high-moisture areas Refer to prouct submittal sheet CB399 for more information USG Fiberock Bran Abuse-Resistant Interior Panels Resist enting, breaking an puncturing, even in high-traffic areas Excellent fire resistance Mae from 95% recycle materials Refer to prouct submittal sheet F102 for more information USG Fiberock Bran Aqua-Tough Interior Panels Use only for wall esigns Increase resistance to abrasion, inentation an penetration Mae from 95% recycle materials Refer to prouct submittal sheet F134 for more information USG Imperial Bran Firecoe Core an Firecoe C Core Gypsum Base Large size, rigi base for fire-rate gypsum veneer plaster systems Designe for irect or resilient attachment to woo or steel framing Multilayere laminate face paper to control water absorption an resist sag Refer to prouct submittal sheet P790 for more information 9 USG Shaft Wall Systems

10 Components Steel Framing USG Steel J-Runner (JR) USG Steel C-H Stu (CH) 1 1 /2" 2 1 /2", 4", 6" 2" 1" 1 3 /8" 2 1 /2", 4", 6" 7 /32" 1" USG Steel Jamb-Strut (JS) USG Steel E-Stu (ES) 1" 1" 6" 2 1 /2", 4", 6" 3" 3 /8" 1" 3 /4" Thickness Steel Framing a Components Design Thickness b Minimum Thickness Style in. mils in. mils ga. CH, ES JR CH, ES, JR, JS Structural Properties Steel Framing Components Component Prouct Average Weight Area I x c S x Allowance Design an Size Ientification (lb./lin. ft.) (sq. in.) (in. 4 ) (cu. in.) Stress (ksi) 2-1/2" C-H Stu 212CH CH " C-H Stu 400CH CH " C-H Stu 600CH Double 6" E-Stu 600ES ES /2" J-Runner 212JR JR " J-Runner 400JR JR " J-Runner 600JR JR /2" Jamb Strut 212JS " Jamb Strut 400JS " Jamb Strut 600JS Note (a) Stus an runners comply with ASTM C645. (b) Properties of steel framing members have been calculate in conformance with ANSI Specification for the Design of Col-Forme Steel Structural Members, 1996 eition. (c) Full section moulus to be use with corresponing esign stress. 10 USG Shaft Wall Systems

11 Components Interior Finishing Proucts Bran Acoustical Sealant Superior performance as a fire caulk in UL-classifie joint systems Minimizes whistling an irt accumulation ue to air movement when applie to partition perimeter an penetrations Refer to prouct submittal sheet J678 for more information Bran First Coat A flat latex paint formulate to provie a superior first (prime) coat over interior gypsum boar an concrete surfaces Equalizes porosity an surface texture ifferences to provie greater uniformity of finish coat Refer to prouct submittal sheet J1095 for more information Bran All Purpose Joint Compoun Versatile performer: tape, finish, texture, laminate or skim coat Combines single-package, reay-mixe convenience with goo taping an topping performance Refer to prouct submittal sheet J60A for more information Bran Plus 3 Lightweight All Purpose Joint Compoun Weighs up to 30% less than conventional com pouns an sans with the ease of a topping compoun With very low shrinkage, it requires only two coats over metal, such as corner beas an fasteners Refer to prouct submittal sheet J498A for more information Bran Tuff-Hie A high solis, vinyl, acrylic latex-base coating for interior spray application over new rywall Single spray application provies the same results achieve using a typical two-step process of skim coating surfaces with joint compoun followe by a coat of primer Saves time an money Refer to prouct submittal sheet J1691 for more information Bran Paper-Face Metal Bea an Trim Cost-effective, problem-free, beautiful corners Superior solution to ege cracking an chipping Refer to prouct catalog J1424 for more information 11 USG Shaft Wall Systems

12 Performance Testing USG shaft wall systems provie superior safety an performance for an important builing component. Performance Tests USG shaft wall systems result from a program of extensive testing an continuous improvements to help you achieve the superior performance that your project emans. Systems provie up to four-hour fire resistance an soun ratings up to 52 STC, an resist both sustaine an intermittent lateral loas an fatigue uner cyclic lateral loaing. Testing Methos All USG proucts an systems unergo exhaustive testing to ensure that they meet exacting stanars. USG proucts are classifie as to fire resistance an fire-hazar properties. As part of this protocol, Unerwriters Laboratories (UL) perioically auits prouction of these materials to ensure compliance with necessary properties. UL is an inepenent, not-for-profit organization that has teste proucts for public safety for over a century. Proucts are manufacture an teste in accorance with recognize stanars. ASTM International is one of the largest voluntary stanars evelopment organizations in the worl, an is a truste source for technical stanars for materials, proucts, systems an services. These systems have been esigne an teste using accepte engineering practices with eflection limits of L/120, L/240 an L/360. Aitionally, limiting height tables liste herein account for flexural an shear stresses. A wie range of prouct an system combinations is available to meet performance requirements: intermittent an sustaine air pressure loaing of 5, 7-1/2, 10 an 15 psf. Testing Results Fire Protection In the event of a fire, mechanical shafts an stairs are vital channels for communication, power, water, air, exhaust an egress making the shafts the lifelines of the builing. Since it is critically important that these walls protect occupants an necessary services from fire, USG shaft wall systems have been teste for fire enurance. The primary attribute of USG shaft wall systems an its components is fire resistance. Testing supporting this attribute ensures that this critical performance component will not be compromise when properly installe. 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 oor manufacturers UL listing for fire amper installation Fire test ata for electrical panels, call-button boxes an other interfaces UL listing of shaft wall hea of wall See the Goo Design Practices section for more information on fire resistance. Soun Control Soun control test ata emonstrate the effectiveness of USG shaft wall systems in attenuating soun. When properly esigne an installe, USG shaft wall systems will increase comfort levels by reucing unwante noise from ajacent spaces. The stanar assembly offers 39 STC rating; 47 STC is achieve by aing 1" soun insulation within the partition cavity, an 52 STC with single-layer 3/4" Ultracoe panels an 3" soun insulation. 12 USG Shaft Wall Systems

13 Performance Testing Testing Results Performance Impact-Resistant for Durability Utilizing abuse-resistant an impact-resistant gypsum panels like Bran Mol Tough AR, USG Sheetrock Bran Mol Tough VHI, USG shaft wall systems meet requirements of IBC Sections an Moisture/Mol The best way to minimize amage from moisture an mol is to minimize or eliminate exposure to water before, uring an after construction. In all cases where moisture intrusion occurs, eliminate all sources of moisture immeiately. Bran Gypsum Liner Panels, Bran Mol Tough Gypsum Liner Panels an USG Sheetrock Bran Glass-Mat Liner Panels have water-resistant facings. In aition, Bran Mol Tough an Bran Glass-Mat Gypsum Liner Panels have moisture- an mol-resistant facings an a waterresistant core. When use in conjunction with goo construction practices, these proucts will minimize, but not eliminate, the risk of moisture an mol amage. For more information on moisture control an mol, see WB2317, Moisture, Mol, an Construction Practices, an SA934, Moisture-Resistant Assemblies. The following Web sites are another resource: New York City Department of Health nyc.gov/html/oh/html/environmental/mol.shtml Search for mol resources. Unite States Environmental Protection Agency epa.gov Search for mol resources. Responsible Solutions to Mol Coalition responsiblemolsolutions.org Search for mol resources. 13 USG Shaft Wall Systems

14 Performance Selector Alternative Materials an Special Requirements The following notes offer alternative methos of construction. 1. Where insulation is shown in assembly rawings, the specific type of prouct is require in the assembly to achieve the state fire-resistance rating. Otherwise, mineral wool or glass fiber insulation may be incorporate into any assembly without compromising the fire-resistant rating. 2. Stu epths are minimum require for fire-resistance rating. 3. Where RC-1 resilient channel is inicate, RC-1 or equivalent may be use. RC-2 is not an equivalent substitution. 4. Use L/360 eflection criteria for limiting height/stu selection an 20 ga. minimum framing when applying USG Durock Bran Cement Boar. Refer to CB399, USG Durock Bran Cement Boar submittal, for more information on application an relate proucts. 5. 5/8" USG Imperial Bran Gypsum Base, 5/8" Bran Mol Tough Firecoe Core Gypsum Panels or 5/8" USG Fiberock Bran Aqua-Tough Interior Panels may be substitute for 5/8" Bran Firecoe Core Gypsum Panels. 6. 1/2" Bran Mol Tough Firecoe C Core or 1/2" USG Imperial Bran Firecoe C Core Gypsum Base may be substitute for 1/2" Bran Firecoe C Core Gypsum Panels. 7. 5/8" Bran Firecoe Core Gypsum Panels, 5/8" USG Imperial Bran Firecoe Core Gypsum Base or 5/8" USG Fiberock Bran panels can be substitute for 1/2" Bran Firecoe C Core Gypsum Panels. 8. Use 20 ga. minimum framing with Bran Mol Tough AR an VHI Firecoe Core, Bran Glass-Mat Panels Mol Tough AR an VHI, or USG Fiberock Bran Panels. 9. 1" Bran Mol Tough Gypsum Liner Panels, or Bran Glass-Mat Gypsum Liner Panels may be substitute for 1" Bran Gypsum Liner Panels in all systems without compromising the fire rating. 10. For more information about performance rate shaft wall systems an for complete list of USG's fire-rate esigns, visit USG Design Stuio at USGDesignStuio.com. 11. For etaile information regaring UL Classifie esigns shown in the Performance Selector, please refer to the UL Fire-Resistance Directory Volume One or visit UL.com. 14 USG Shaft Wall Systems

15 Performance Selector All etails, specifications an ata containe in this literature are intene as a general guie. These proucts must not be use in a esign or construction of any given structure without complete an etaile evaluation by a qualifie structural engineer or architect to verify suitability of a particular prouct for use in the structure. 1-Hour Fire-rate Construction Non-loabearing Acoustical Performance Reference Construction Detail Description Test Number STC Test Number ARL Inex wt. 8 5/8" Bran Firecoe Core Gypsum Panels, joints finishe UL Des U415, System A or 39 USG Base on 4" C-H stus 25 gauge SA " 2-1/2" USG C-H Stus 25 gauge 24" o.c. U469 1" Bran Gypsum Liner Panels 2-Hour Fire-rate Construction wt " 1/2" Bran Firecoe C Core Gypsum Panels, face layer joints finishe 2-1/2" USG C-H Stus 25 gauge 24" o.c. 1" Bran Gypsum Liner Panels UL Des U415, System B or U USG SA USG Base on 4" C-H stus 25 gauge 48 RAL-OT Base on 1" soun batts in cavity 50 RAL-OT Base on 4" C-H stus 25 gauge with 3" mineral fiber insulation wt " 3/4" Bran Ultracoe Core Gypsum Panels, joints finishe 4" USG C-H stus 25 gauge 24" o.c. 3" Thermafiber SAFB 1" Bran Gypsum Liner Panels UL Des U415, System C 51 RAL-OT Base on 4" C-H stus with 3" Thermafiber SAFB insulation SA926 3 wt " 1/2" USG Durock Bran Cement Boar 5/8" Bran Firecoe Core Gypsum Panels 2-1/2" USG C-H stus 20 gauge 24" o.c. 1-1/2" Thermafiber SAFB 1" Bran Gypsum Liner Panels USG Durock Bran Cement Boar, screw attache an laminate to gypsum panel with 4 vertical strip ceramic tile mastic centere between stus UL Des U415, System D SA926 4 wt " 1/2" Bran Firecoe C Core Gypsum Panels 2-1/2" USG C-H Stus 25 gauge 24" o.c. 1" Bran Gypsum Liner Panels Joints finishe both sies UL Des U415, System E or U USG Base on 4" C-H stus 25 gauge SA926 5 wt. 10 4" 1/2" Bran Firecoe C Core Gypsum Panels applie vertically, face layer joints finishe applie vertically, face layer joints finishe RC-1 resilient channel or equivalent 24" o.c. 2-1/2" USG C-H Stus 25 gauge 24" o.c. 1" Bran Gypsum Liner Panels UL Des U415, System F 53 USG Base on 4" C-H stus 25 gauge with 3" mineral fiber insulation 58 USG Base on 4" C-H stus 25 gauge with aitional layer on liner panel sie an 3" mineral fiber insulation SA926 6 wt. 8 2" 2" 1" x 2" perimeter angles 25 gauge 1" Bran Gypsum Liner Panels, fastene to angles 1/2" Bran Firecoe C Core Gypsum Panels 1/2" Bran Firecoe C Core Gypsum Panels, joints finishe UL Des U529 SA USG Shaft Wall Systems

16 Performance Selector 2-Hour Fire-rate Construction Non-loabearing Acoustical Performance Reference Construction Detail Description Test Number STC Test Number ARL Inex 5 1 4" 5/8" Bran Firecoe Core Gypsum Panels, face layer joints finishe 4" USG C-H stus 20 gauge 24" o.c. run horizontally an attache to vertical USG J-runners, 20 gauge 1" Bran Gypsum Liner Panels UL Des U437 USG Base on 4" C-H stus 25 gauge SA Hour Fire-rate Construction wt " 5/8" Bran Firecoe C Core Gypsum Panels, face layer joints finishe 2-1/2" USG C-H stus 25 gauge 24" o.c. 1" Bran Gypsum Liner Panels UL Des U415, System G SA926 9 wt " 5/8" Bran Firecoe C Core Gypsum Panels, face layer joints finishe 2-1/2" USG C-H stus 25 gauge 24" o.c. 1" Bran Gypsum Liner Panels 5/8" Bran Firecoe C Core Gypsum Panels, joints finishe UL Des U415, System H 49 USG Base on 4" C-H Stus SA Hour Fire-rate Construction wt " 3/4" Bran Ultracoe Core Gypsum Panels, on furring channel 24" o.c., over two layers 3/4" Bran Ultracoe Core Gypsum Panels, face layer joints finishe 2-1/2" USG C-H Stus 25 gauge 24" o.c. 1" Bran Gypsum Liner Panels Base layer over furring channel applie vertically UL Des U415, System I SA Note: Stu size an gauge shown are minimums. Possible panels substitutions. Note Stu size an gauge shown are minimums. Possible panel alternatives shown on cross reference of USG Panels an UL Fire Ratings in SA100, Fire-Resistant Assemblies. 16 USG Shaft Wall Systems

17 Performance Selector Wall Systems Limiting Heights USG shaft wall systems are engineere to withstan pressure loas an provie in-service impact resistance to ensure long-term performance an urability. Use this section to etermine the size an gauge of framing for the system you select. You will nee to know elevator pressures an other in-service emans. Structural Performance Limiting Heights Flexing Resistance for In-Service Performance Shaft walls are subjecte to both positive an negative pressures as elevator cabs rise an escen. This piston effect of an elevator in its shaft causes continual flexing of the shaft wall. In tests, USG shaft wall systems were subjecte to over 1 million full oscillation cycles to moel wall performance through the life of the builing. These tests showe that a 25 ga. J-runner is inaequate at the top or bottom of a shaft wall. As the long runner leg is continually flexe from wall eflection, it can rupture an screws can strip out an fracture from the flexing. Oscillation tests showe 24 ga. J-runners minimize these problems an are essential to long-term safety. Maximum partition heights are shown for four ifferent intermittent air pressure loas an three allowable eflections. The applie pressure loa is selecte by the esigner base on elevator cab spee an the number of elevators per shaft. Instea of using only eflection criteria, USG esign ata consier several aitional factors in etermining limiting partition heights. A. Bening stress the unit force exerte that will break or istort the stu. B. En reaction shear etermine by the amount of force applie to the stu, which will ben or shear the J-runner or cripple the stu. C. Deflection the actual eflection uner a loa. Allowable eflection is base on the amount of bening uner loa that a particular wall can experience without exceeing a prescribe ratio relate to partition height. Elevator Shaft Pressures The air pressure loa on shaft walls epens upon the elevator cab spee an the number of elevators per shaft. The following recom men ations are erive from USG tests conucte in three high-rise builings ranging in height from 17 to 100 stories. Recommene Elevator Shaft Pressure Loa Elevator velocity ft./min. One or two elevators per shaft Three or more elevators per shaft 0 to psf 5.0 psf 180 to psf 5.0 psf 700 to 1, psf 7.5 psf 1,600 to 2, psf a 7.5 psf Note (a) Single-cab high-spee elevator shafts may require special esign consierations. 17 USG Shaft Wall Systems

18 Performance Selector Wall Systems Limiting Heights Table Intermittent Air Pressure Loa (win loa) psfa Stu Type an Size 2-1/2" C-H Stus Designation Allowable Deflection 1-Hr. Shaft Wall / Stair Wall (U415 System A) b 2-Hr. Shaftwall (U415 System C) b CH25 L/120 11' 5" 10' 0" 9' 1" 7' 11" L/240 10' 7" 9' 3" 8' 4" 7' 4" L/360 9' 4" 8' 2" 7' 5" 6' 6" 212CH20 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 Stus 400CH25 L/120 15' 2" 12' 5" 10' 9" 8' 9" 15' 2" 12' 5" 10' 9" 8' 9" L/240 14' 5" 12' 5" 10' 9" L/360 12' 9" 11' 2" 10' 1" 400CH20 L/120 20' 5" 17' 10" 16' 2" 8' 9" 8' 9" 13' 4" L/240 17' 6" 15' 3" 13' 10" 12' 1" L/360 15' 3" 13' 4" 12' 1" 10' 7" 6" C-H Stus 600CH20 L/120 26' 3" 21' 5" L/240 24' 0" 20' 12" 18' 7" 18' 7" L/360 21' 1" 18' 5" 16' 9" Double 6" 600ES20 L/120 28' 0" 28' 0" 28' 0" E-Stus e L/240 28' 0" 24' 9" 22' 6" 15' 2" 15' 2" 14' 8" 20' 0" 20' 0" L/360 25' 3" 21' 9" 19' 6" 17' 3" 14' 5" 12' 5" 10' 9" 12' 9" 11' 2" 10' 1" 20' 5" 17' 10" 16' 2" 8' 9" 8' 9" 13' 4" 17' 6" 15' 3" 13' 10" 12' 1" 15' 3" 13' 4" 12' 1" 10' 7" 26' 3" 21' 5" 24' 0" 20' 12" 18' 7" 18' 7" 21' 1" 18' 5" 16' 9" 28' 0" 28' 0" 28' 0" 28' 0" 24' 9" 22' 6" 15' 2" 15' 2" 14' 8" 20' 0" 20' 0" 25' 3" 21' 9" 19' 6" 17' 3" Stu Type an Size 2-1/2" C-H Stus Designation Allowable Deflection 2-Hr. Shaftwall (U415 System B, D, F) 2-Hr. Stairwall (U415 System E) c CH25 L/120 12' 4" 10' 10" 9' 10" L/240 11' 4" 9' 11" 8' 12" 8' 7" 12' 2" 10' 8" 9' 8" 7' 10" 11' 2" 9' 9" 8' 10" L/360 10' 4" 9' 1" 8' 3" 7' 2" 9' 10" 8' 7" 7' 10" 6' 10" 212CH20 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 Stus 400CH25 L/120 17' 9" 14' 6" 12' 7" 10' 3" L/240 15' 7" 13' 8" 12' 5" 10' 3" L/360 13' 11" 12' 2" 11' 1" 9' 8" 400CH20 L/120 19' 11" 17' 4" 15' 9" 13' 10" 16' 4" 14' 3" 15' 2" 13' 3" 12' 11" 12' 0" 8' 5" 7' 9" 10' 7" 10' 6" 13' 4" 11' 8" 10' 7" 9' 3" 19' 6" 17' 1" 15' 6" 13' 7" 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 Stus 600CH20 L/120 25' 4" 22' 2" 19' 8" 16' 1" L/240 21' 9" 19' 0" 17' 4" 15' 1" 28' 0" 25' 1" 24' 10" 21' 9" 21' 9" 17' 9" 19' 9" 17' 3" L/360 20' 0" 17' 6" 15' 11" 13' 11" 21' 11" 19' 2" 17' 5" 15' 2" Double 6" 600ES20 L/120 28' 0" 28' 0" E-Stus e L/240 28' 0" 26' 3" 28' 0" 24' 0" L/360 26' 3" 23' 0" 21' 0" 20' 0" 20' 0" 18' 3" 28' 0" 28' 0" 28' 0" 26' 0" 28' 0" 23' 6" 20' 0" 20' 0" 25' 3" 22' 9" 20' 6" 18' 0" 18 USG Shaft Wall Systems

19 Performance Selector Wall Systems Limiting Heights Table Stu Type an Size 2-1/2" C-H Stus Designation Allowable Deflection 3-Hr. Shaftwall (U415 System G) 3-Hr. Stairwall (U415 System H) c CH25 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" 212CH20 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 Stus 400CH25 L/120 17' 9" 14' 6" 12' 7" 10' 3" L/240 15' 7" 13' 8" 12' 5" 10' 3" L/360 13' 11" 12' 2" 11' 1" 9' 8" 400CH20 L/120 19' 11" 17' 4" 15' 9" 13' 10" 16' 4" 14' 3" 15' 2" 13' 3" 12' 11" 12' 0" 10' 7" 10' 6" 13' 4" 11' 8" 10' 7" 9' 3" 19' 6" 17' 1" 15' 6" 13' 7" 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 Stus 600CH20 L/120 25' 4" 22' 2" 19' 8" 16' 1" L/240 21' 9" 19' 0" 17' 4" 15' 1" 28' 0" 25' 1" 24' 10" 21' 9" 21' 9" 17' 9" 19' 9" 17' 3" L/360 20' 0" 17' 6" 15' 11" 13' 11" 21' 11" 19' 2" 17' 5" 15' 2" Double 6" 600ES20 L/120 28' 0" 28' 0" E-Stus e L/240 28' 0" 26' 3" 28' 0" 24' 0" L/360 26' 3" 23' 0" 21' 0" 20' 0" 20' 0" 18' 3" 28' 0" 28' 0" 28' 0" 26' 0" 28' 0" 23' 6" 20' 0" 20' 0" 26' 3" 22' 9" 20' 6" 18' 0" Stu Type an Size 2-1/2" C-H Stus Designation Allowable Deflection 4-Hr. Shaftwall (U415 System I) CH25 L/120 12' 4" 10' 10" 9' 10" L/240 11' 4" 9' 11" 8' 12" 8' 7" 7' 10" L/360 10' 4" 9' 1" 8' 3" 7' 2" 212CH20 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 Stus 400CH25 L/120 17' 9" 14' 6" 12' 7" 10' 3" L/240 15' 7" 13' 8" 12' 5" 10' 3" L/360 13' 11" 12' 2" 11' 1" 9' 8" 400CH20 L/120 19' 11" 17' 4" 15' 9" 13' 10" L/240 18' 1" 15' 9" 14' 4" 12' 6" L/360 16' 2" 14' 1" 12' 10" 11' 3" 6" C-H Stus 600CH20 L/120 25' 4" 22' 2" 19' 8" 16' 1" L/240 21' 9" 19' 0" 17' 4" 15' 1" L/360 20' 0" 17' 6" 15' 11" 13' 11" Double 6" 600ES20 L/120 28' 0" 28' 0" E-Stus e L/240 28' 0" 26' 3" 28' 0" 24' 0" L/360 26' 3" 23' 0" 21' 0" 20' 0" 20' 0" 18' 3" Notes See the Performance Selector for system references an rate assembly etails. Runners fasteners shoul withstan 193 lb. single shear an 200 lb. bearing force; attachment spacing shoul not excee 24". L/180 eflection information available upon request from USG. (a) Stu spacing of 24" o.c. (b) For assembly single-layer boar attache to stus. (c) For assembly with single-layer boar attache to both sies of stus. (e) Attachment of USG steel ouble 6" E-Stu for USG shaft wall systems. The stus are to be attache back-to-back (web-to-web) with pairs of 1/2" long Type S-12 pan hea screws installe in two rows, space as wiely appart as possible. The first an last pairs of fasteners shall start within 6" of each en of the stus. They shall then be space at a maximum of 12" o.c. Limiting Criteria: c - practical limitation - eflection f - bening v - en reaction shear 19 USG Shaft Wall Systems

20 Performance Selector Wall Systems Limiting Heights Unline Shafts Gypsum shaft walls have been use for many years for vent an air shafts. Their fire-resistant features an economical ry construction make them ieal for this use. To function properly, vent an air shaft systems shoul be esigne with the following performance provisions: 1. Gypsum boar surface temperature oes not excee 125 F. 2. Separate approve liners shoul be installe in areas subject to continuous moisture overspray, conensation or air stream temperature over 125 F. 3. Air stream ew point temperatures are maintaine below gypsum boar surface temperature. 4. The assembly is constructe to withstan sustaine esign uniform air pressure loas not exceeing 10 psf. Startup surge loas shoul not be greater than 1-1/2 times the esign static loa. (See table below for limiting heights.) 5. To ensure airtight construction, select appropriate sealants an apply where require. Sustaine Pressure Loa psf 2-Hr. Fire-Rate System 1-Hr. Fire-Rate System Stu Type Designation Stu Allowable an Size Spacing eflection 2-1/2" C-H Stus 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 Stus 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 Stus 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 at p-e-i.com Notes Runner fasteners shoul withstan 193-lb. single shear an 200-lb. bearing force; attachment spacing shoul not excee 24" o.c. (a) Use JR20 runner for this height. 20 USG Shaft Wall Systems

21 Performance Selector Wall Systems Soli Shaft Wall USG shaft wall systems can be use as a vent enclosure for vertical shafts with a two-hour fire rating per UL Design U529. This shaft assembly is particularly suite for structures having a number of relatively small an separate mechanical, service an ventilator shafts. Vent Shaft Elevation 2' 2' 1" Bran Gypsum Liner Panel 1 5 /8" type S screws 12" o.c. to angle 3' 4' 1 /2" Bran Firecoe C Core Gypsum Panel 1 1 /2" type G screws 24" o.c. 1 /2" Bran Firecoe C Core Gypsum Panel 1 1 /2" type G screws 24" o.c. Bran setting-type joint compoun lamination Angle runner 1' 4' 2' Vent shaft elevation Wall Intersection Corner 25 ga. 1" x 2" angle 1" Bran Gypsum Liner Panel l 1" Bran Gypsum Liner Panel 24 ga. 2" x 2" angle Bran Gypsum Panels Bran Gypsum Panels Note Limiting height of system is 12.0". Install panels vertically an full height only. 21 USG Shaft Wall Systems

22 Performance Selector Ceiling System Limiting Spans Horizontal Assemblies USG shaft wall systems installe horizontally provie economical construction for fire-resistive uct enclosures, corrior ceilings an stairway soffits. Triple Layer With 1" liner panels inserte in USG C-H stus 24" o.c. an triple-layer 1/2" Bran Firecoe C Core Gypsum Panels screw-attache to stus, the system provies two-hour protection from fire. This system is limite to a maximum span of 5'-4". For larger spans, use the 2-Hour Rate Duct Enclosure (UL Design K504) etail as shown on page 24. Double Layer With ouble-layer 1/2" Bran Firecoe C Core Gypsum Panels screw-attache to stus, the assembly provies two-hour fire-resistive ceiling construction for corriors an stair soffits (see esign etails). Single Layer With single-layer 5/8" Bran Firecoe X or C Core Gypsum Panels screw-attache to stus, the assembly provies one-hour fire-resistive ceiling construction for corriors an stair soffits. Limitations 1. USG C-H stus are not esigne to carry live loas or mechanical equipment or provie material storage area. 2. Maximum stu spacing is 24" o.c.; maximum spans are shown in table below. Limiting Spans Horizontal Shaft Walls 1-Hour Exit Corrior Ceiling an Stair Soffits Single-Layer 5/8" Gypsum Panels c Maximum Span 212CH ' - 6" 212CH ' - 4" 400CH ' - 3" 400CH ' - 11" 600CH ' - 6" 2-Hour Exit Corrior Ceiling an Stair Soffits Double-Layer 1/2" Gypsum Panels c Maximum Span 212CH ' - 10" 212CH ' - 8" 400CH ' - 7" 400CH ' - 0" 600CH ' - 3" For more information, consult Progressive Engineering Report AER at p-e-i.com 22 USG Shaft Wall Systems

23 Design Details Ceiling Membrane 2-Hr. Rate Assembly Horizontal Membrane or Metal Duct Enclosure Duct surface Fastener 24" o.c. max. (shear an withrawal resistance as require by specific esign conitions) Bran Acoustical Sealant 1 /2" type S pan hea screw at 12" o.c. (attach both sies of C-H stu an J-runner at top an bottom of stu) Fastener 24" o.c. max. (shear an withrawal resistance as require by specific esign conitions) Rotate Section 1" Bran Gypsum Liner Panel max. height 4'-0" USG steel C-H stu Bran Acoustical Sealant max. span 5'- 4" Bran Gypsum Panels For more information consult Progressive Engineering Report AER at p-e-i.com. For spans greater than 5'-4", see UL Design # K504 on page 24. Metal Duct Enclosure - 2-Hr. Rate Assembly Ceiling Membrane of 1-Hr. Egress Corriors an Stair Soffits (see AER-09038) Ceiling Membrane of 2-Hr. Egress Corriors an Stair Soffits (see AER-09038) 1" Bran Gypsum Liner Panel 1" Bran Gypsum Liner Panel USG steel C-H stu Fasteners as require 24" o.c. USG steel C-H stu Fasteners as require 24" o.c. Bran Gypsum Panel Bran Acoustical Sealant Bran Gypsum Panels Bran Acoustical Sealant Refer to span table on page 22. Refer to span table on page USG Shaft Wall Systems

24 Design Details Ceiling Membrane 2-Hr. Duct Enclosure (UL Design K504) 1" Bran Gypsum Liner Panels Vertical assembly shown is UL Design #U415 System B. Duct Steel stus Steel strap Perimeter channel 5 /8" Bran Firecoe Core Gypsum Panels or 5 /8" Bran UltraLight Panels Firecoe X RC-1 resilient channels 16" o.c. 5 /8" Bran Firecoe Core Gypsum Panels or 5 /8" Bran UltraLight Panels Firecoe X 5 /8" Bran Firecoe Core Corner bea Gypsum Panels or 5 /8" Bran UltraLight Panels Firecoe X 2-Hr. Rate Ceiling Assembly (UL Design K504) Steel strap Steel stus RC-1 resilient channels 16" o.c. 5 /8" Bran Firecoe Core Gypsum Panels or 5 /8" Bran UltraLight Panels Firecoe X 5 /8" Bran Firecoe Core Gypsum Panels or 5 /8" Bran UltraLight Panels Firecoe X 24 USG Shaft Wall Systems

25 Design Details Basic Interfaces System B Hea Section (UL System HW-D-0603) Base Section (UL System BW-S-0016) 1" min. 3 /8" to 1 /2" Bran Acoustical Sealant 5 /8" max. over 4" 1" Bran Gypsum Liner Panels Bran Firecoe Core Gypsum Panels USG steel C-H stu Gypsum panel cant screw attache to vertical stus (for projections over 4") Bran Firecoe Core Gypsum Panels USG steel C-H stu Bran Gypsum Liner Panels 75 min. Bran Acoustical Sealant as require for soun Call-Button Box 25 ga. steel strip (6" x 12" min.) 4" min Call-button box 1" Bran Gypsum Liner Panels Bran Firecoe Core Gypsum Panels 25 USG Shaft Wall Systems

26 Design Details Basic Interfaces System B Wall Junction Outsie Corner USG corner reinforcement Bran Gypsum Panels 1" Bran Gypsum Liner Panels USG steel C-H stu Bran Acoustical Sealant 1" Bran Gypsum Liner Panel 1" Bran Gypsum Panel or USG Sheetrock Bran Mol Tough Gypsum Liner Panel Wall Intersection Insie Corner Sealant Bran Gypsum Panels Bran Firecoe Core Gypsum Panels USG corner reinforcement 1" Bran Gypsum Liner Panel Fasteners as require 24" o.c. USG steel C-H stu 1" Bran Gypsum Liner Panel 1" Bran Gypsum Liner Panel 1" Bran Gypsum Liner Panel 26 USG Shaft Wall Systems

27 Design Details Basic Interfaces System B Outlet/Switch Box Control Joint in 2-Hr. Shaftwalls 1" Bran Gypsum Liner Panels 1" Bran Gypsum Liner Panels 1 1 /4" C-H stu Outlet box 5 /8" Bran Firecoe Core Gypsum Panels 4" 1" type S screws Bran Gypsum Panels 5 /8" Bran Firecoe Core Gypsum Panels 1 /2" Control joint 1 5 /8" type S screws Stair Hanger an Ro Application Cross-Section at Stair Hanger Stairwell sie Stair stringer Hanger ro 1" Bran Gypsum Liner Panel l Bran Gypsum Panel Stair laning Hanger ro Bran Gypsum Panel USG steel C-H stu 24" o.c. Steel angle 1" Bran Gypsum Liner Panel 27 USG Shaft Wall Systems

28 Design Details Basic Interfaces System B Hanrail Application Steel Beam (UL System HW-D-0610) 1" Bran Gypsum Liner Panel Steel beam with fireproofing Steel plate (20 ga. min.) fastene to stus parallel to stringers as require Bran Gypsum Panel Power-actuate fastener 24" o.c. attache to beam before fireproofing Bran Gypsum Liner Panel Bran Acoustical Sealant Bran Firecoe Core Gypsum Panels Steel Beam with Z-Clip (UL System HW-D-0609) Steel Beam with Offset (UL System HW-D-0611) Steel beam with fireproofing Steel beam with fireproofing Z-clip attache to beam before fireproofing Z-clip max. spacing 24" o.c. min. 20 ga. min. Two fasteners per leg 1 1 /2" min. 8" max. Fasteners Fasteners 1" Bran Gypsum Liner Panel Bran Acoustical Sealant USG steel C-H stu Bran Firecoe Core Gypsum Panels Bran Acoustical Sealant Bran Firecoe Core Gypsum Panels Continuous 14 ga. steel plate attache to beam before fireproofing 1" Bran Gypsum Liner Panel 28 USG Shaft Wall Systems

29 Design Details Fire Damper Typical Penetrations Elevation at Duct Opening Teste per UL R13479 A Duct opening B Ceiling USG steel E-stus or J-runners back-to-back USG steel C-H stus Section A Section B 1-1/2 Hr. Fire Damper Teste per UL R /2 Hr. Fire Damper Teste per UL R " Bran Gypsum Liner Panel USG steel J-runner heaer 1 /2" max. Damper sleeve Bran Firecoe Core Gypsum Panels 1 /2" x 1 /2" 16 ga. galvanize angle Damper sleeve 1 /2" max. 1 /2" x 1 /2" 16 ga. galvanize angle 29 USG Shaft Wall Systems

30 Design Details Elevator Door Framing Elevator Door Framing Elevator Door Rough Opening 20 ga. jamb strut Screw attache both sies USG C-H stu A A USG C-H stu 10'-0" max USG steel J-runner Screw attache both sies USG steel J-runner USG steel J-runner heaer USG jamb strut 5'-0" max. opening 20 ga. jamb strut 1" Bran Gypsum Liner Panel 10'-0" max Screw attache both sies Section A-A Detail Elevator Door Rough Opening Bran Firecoe Core Gypsum Panels 1" Bran Gypsum Liner Panel Fasten both sies of C-H stu to J runner Screw attach at bottom leg of C-H stu Notes 1. Framing at elevator oor shall be a minimum 4" stus an runners 20 gauge. 2. Horizontal placement of liner panel an C-H Stus per UL Design U Flanges of the jamb strut must be continuously brace by screw connections to the liner an face panels 12" o.c. 4. For oors greater than 5' wie an/or transom heights greater than 4', reinforce the 400JS-34 with a neste 400ES USG Shaft Wall Systems

31 Design Details Wall Systems C-H Stus an Liner Panels Installe Horizontally Horizontal Shaftwall Elevation per UL Design U437 Section C-C Hea Section C USG steel J-runner heaer C Bran Gypsum Liner Panels Bran Acoustical Sealant 1" Structural member USG C-H stus A A B B 5 /8" Bran Firecoe Core Gypsum Panels 1" Bran Gypsum Liner Panel s D D Section B-B Wall Intersection Section D-D Base Section 5 /8" Bran Firecoe Core Gypsum Panels Locate screws to avoi stus Bran Acoustical Sealant USG steel C-H stu 5 /8" Bran Firecoe Core Gypsum Panels Sealant 1" Bran Gypsum Liner Panel Structural member 1" Bran Gypsum Liner Panels 3 /8" J-runner to stu 1 /2" J-runner to panel Note Horizontal framing shall be a minimum 4" C-H Stus an runners 20 gauge. 31 USG Shaft Wall Systems

32 Goo Design Practices Use this section as a reference if questions arise uring the esign or application of USG shaft wall systems. This section is an overview of goo esign, application, installation an safety consierations that shoul be aresse when USG proucts an systems are use. This section outlines some major issues, but is not intene to be comprehensive. We recommen that architects an contractors seek the assistance of safety professionals, especially at the construction site, because there are many factors to consier that are not inclue here. For more etaile information on safety an material hanling, please refer to Chapter 13 of The Gypsum Construction Hanbook. 1 System Performance USG conucts tests on proucts an systems to meet performance requirements specifie by various agencies. Upon written request we will provie test certification for publishe fire, soun, structural an other pertinent ata covering systems esigne an constructe accoring to our publishe specifications. Substitutions of any of the components are not recommene an are not supporte by USG. Stanars The following stanars apply: ASTM C1396: Stanar Specification for Gypsum Boar ASTM C1658: Stanar Specification for glass-mat Gypsum Panels ASTM C1325: Stanar Specification for Non-Asbestos Fiber-Mat Reinforce Cementitious Backer Units ASTM C1278: Stanar Specification for Fiber-Reinforce Gypsum Panel ASTM C840: Stanar Specification for Application an Finishing of Gypsum Boar ASTM C754: Stanar Specification for Installation of Steel Framing Members to Receive Screw-Attache Gypsum Boar, Backing Boar, or Water-Resistant Backing Boar ASTM C645: Stanar Specification for Non-Loa (Axial) Bearing Steel Stus, Runners (Track), an Rigi Furring Channels for Screw Application of Gypsum Boar ASTM C475: Stanar Specification for Joint Treatment Materials for Gypsum Wallboar Construction ASTM C1002: Stanar Specification for Steel Drill Screws for the Application of Gypsum Boar ASTM C1047: Stanar Specification for Accessories for Gypsum Wallboar an Gypsum Veneer Base ASTM D3273: Stanar Test Metho for Resistance to Growth of Mol on the Surface of Interior Coatings in an Environmental Chamber 2 Fire Resistance Use fire test ata to compare an select materials an assemblies, an to secure acceptance by the authority having jurisiction. SA100, Fire-Resistant Assemblies, shows teste fire resistance for various systems. For assemblies teste at Unerwriters Laboratories Inc. (UL), ratings are specific to the esigns teste, an o not necessarily apply to alternate proucts or construction. For example, insulation may not be ae to floor- or roof-ceiling assemblies, unless escribe in the UL esign. Aition of insulation in the conceale space between the ceiling membrane 32 USG Shaft Wall Systems

33 Goo Design Practices an the floor or roof structure may reuce the hourly rating of an assembly by causing premature isruption of the ceiling membrane an/or higher temperatures on structural components uner fire exposure conitions. Increasing the size or gauge of the stu (e.g., 2-1/2" C-H stu 25 gauge to 4" C-H stu 20 gauge) oes not affect the fire resistance rating of the assembly. For more etaile information, refer to the system fire resistance Performance Selector on pages Structural Criteria Builing structure supporting USG Shaftwall system must be capable of withstaning the loas applie by Shaftwall assemblies. Interior non-bearing partitions such as USG shaft wall are not esigne to carry axial loas. Limiting heights are base on stress or eflection limits for lateral loas specifie in the Performance Selector of this guie. Height limitations epen on the gauge of the steel use, imensions of the stu, stu spacing, an the allowable eflection limit. For limiting height tables, see page 17; for horizontal shaft wall span table, see page 20; an for limiting heights, unline return air shafts, see page 18. Note: Size an gauge of the stus are specifie in the limiting heights tables. Other sizes an gauges have not been evaluate for performance. 4 Control Joints Locating control joints is the responsibility of the esign professional/architect. Integrate these suggestions with Builing Movement project conitions when etermining specific locations for control joints. Control joint is a general term for methos use to minimize (not eliminate the potential for) cracking in partitions an 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 calle a perimeter relief joint. A control joint is effective in minimizing cracking cause by tensile or compressive movement in a membrane resulting from thermal, hygrometric an 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 excees 30' expansion or control joints occur through the builing itself in stairwells at each floor level Ceiling-height oor frames may be use as control joints. Less-than-ceiling-height oor frames shoul have control joints extening to ceiling from both corners on both sies of the partition. Treat winow openings in same manner as oors. Zinc control joints, when properly insulate an backe by gypsum panels, have been fire-enurance teste for use in one- an two-hour fire-rate walls. Proper installation of control joints in partitions an ceilings requires breaking the gypsum panels or lath behin the control joint. In ceiling construction, the framing shoul also be broken. In partitions, separate stus are use on each sie of the joint with the runner track separate at that location. 5 Pressure Loas Where shaft walls enclose elevator an return air vents, an intermittent pressures up to 15 psf are expecte, Minimizing Win Bran Acoustical Sealant is recommene at intersections with floors, ceilings, columns, ucts, etc. to seal Noise peripheries an penetrations an minimize whistling an irt accumulation ue to air movement. Sealant selection incluing joint treatment, surface coatings an etails to seal the wall uner these sustaine pressures must be provie by the esigner. See pages for information on evaluating pressure loaing an selecting the appropriate framing components base upon these esign criteria. 33 USG Shaft Wall Systems

34 Goo Design Practices 6 Pressure Loas Shaft walls may be use for air hanling with sustaine pressures up to 10 psf. When air pressure excees 10 psf, Air Hanling air hanling shoul be containe with a metal uct. See pages for information about air hanling an vent shaft enclosures. 7 Penetrations Penetrations of the shaft wall, such as oor frames an uct openings, require aitional reinforcement at corners to istribute concentrate stresses if a control joint is not use. Penetrations greater than 48" wie require supplemental support for the shaft wall at the opening. Where access panels or large uct penetrations occur in shafts having pressure loas, heaers, sills an ajacent channels may require reinforcing to properly istribute these loas. 8 Soun Control Use soun test ata to compare an select materials an constructions. These ata frequently are essential for securing compliance by the agency having jurisiction. See SA200, Acoustical Assemblies, for acoustical performance. Soun control refers to the ability to attenuate soun passing through a partition. The Soun Transmission Class (STC) is a wiely use rating of soun attenuation performance. It is relatively accurate for speech souns but not for music, mechanical equipment noise or any soun with substantial low-frequency energy. It is teste per ASTM E90 an rate per ASTM E413. See the Performance Selector for the STC ratings for USG shaft wall systems. Soun tests are conucte uner ieal laboratory conitions per ASTM proceures. USG proucts are assemble in a specific manner to meet the requirements of these ASTM proceures. Substitution of materials other than those teste or eviation from the specifie construction may aversely affect performance. Fiel performance epens on builing esign an careful attention to etailing an workmanship. Where these partitions are use for soun control, seal the partition perimeter with 1/4" min. roun bea of Bran Acoustical Sealant. Seal aroun all penetrations. 9 Moisture Unerstaning water an mol an its impact on the construction process an builing materials are integral to an Mol goo esign an construction practices. USG offers references an aitional sources that reinforce goo esign, construction an maintenance practices. These practices are generally recognize as necessary to minimize moisturerelate problems an the growth of mol in a builing environment. If you have aitional questions, please contact those sources or USG. The best way to aress mol is to make sure that builing materials o not get wet before an uring installation an are not expose to moisture insie the finishe builing. See Moisture/Mol in the Performance Testing section for more information. 10 Air an Water Flashing an sealants as shown in the construction ocuments an as selecte by the architect an/or structural engineer Infiltration shoul be provie to resist air an water infiltration. The flashing an sealants selecte shall be installe in a workmanlike manner in appropriate locations to maintain continuity of air/water barriers, particularly at winows, oors an other penetrations of exterior wall. 11 Vapor Retarers Water vapor control must always be consiere in the esign of exterior wall systems. Humiity an temperature conitions may require the installation of a vapor retarer to prevent moisture conensation within the wall an the resulting amage. To etermine the necessity an location of vapor retarers, a water vapor transmission an ew point analysis of the layere wall assembly shoul be conucte by a qualifie engineer. 34 USG Shaft Wall Systems

35 Goo Design Practices 12 Prouct Hanling Gypsum Panels an Storage Protect all gypsum proucts from exposure to excessive or continuous moisture an the elements elements before, uring an after installation. Eliminate sources of moisture immeiately. Metal Framing Protection Give light-gauge metal components such as steel stus an runners, furring channels an resilient channels aequate protection in the warehouse an on the jobsite against rusting cause by moisture. In marine areas such as the Caribbean, Floria an the Gulf Coast where chlorie an sea salt are present in combination with excessively high humiity, use of components that offer increase protection against corrosion is recommene. 13 Application Call-Button Floor Inicator an Electric Boxes Shaft walls will accommoate outlet boxes with epths up to the stu with. See page 25 for etails. Framing Attachment Runners an stus attache to beams or columns may nee to be installe before steel is spray-fireproofe. Excess fireproofing shoul be remove from runners an stus before installing shaft wall liner an sealant. Bran Gypsum Liner Panel Application Butt Joints When an installation of USG shaft wall height excees maximum available panel length, it is necessary to incorporate a butt joint between two liner panels. Stagger butt joints in ajacent panels top an bottom to prevent a continuous horizontal joint. Joint shoul be locate in top or bottom thir of wall. Horizontal joints nee not be backe by steel framing to maintain the fire-rating of the assembly. 14 Painting Systems Painting proucts an systems shoul be use that comply with recommenations an requirements in appenices of ASTM C840. For priming an ecorating with paint, texture or wall covering, follow manufacturer s irections. All surfaces, incluing applie joint compoun, must be thoroughly ry, ust-free an not glossy. Prime with USG Sheetrock Bran First Coat or with an unilute, interior latex flat paint with high-solis content. Allow to ry before ecorating. To improve fastener concealment, where gypsum panel walls an ceilings will be subjecte to severe artificial or natural sie lighting an ecorate with a gloss paint (egg shell, semi-gloss or gloss), the gypsum panel surface shoul be skim coate with joint compoun to equalize suction an texture ifferences between the rywall face paper an the finishe joint compoun before painting. Bran Tuff-Hie Primer-Surfacer skims an primes in a single application. 15 Screws USG Durock TM Bran Fasteners for Steel Framing USG Durock Tile Backer Screws for steel framing Type G screws; 1-5/8", 1-1/4". USG Fiberock Bran Panel Fasteners for Steel Framing Use corrosion-resistant Type S-12 buglehea screws for ga. steel framing. When using 25 ga. steel framing, fasteners shoul be space no greater than 8" o.c. Fasteners must be of sufficient length to ensure a minimum of 3/8" penetration into steel framing. 16 Steel Door Frames Orere separately, shoul be at least 16 ga. steel, shop prime, an have throats accurately forme to overall thickness of the shaft wall plus 3/32" minimum. They shoul be anchore at floor with 16 ga. steel plates wele to trim flanges, with provision for two power-riven anchors or equal per plate. Jamb anchors shoul be 18 ga. steel wele in jamb an screw-attache to anchors. USG reserves the right to make changes or improvements in the esign of all catalogue items without notice an without obligation to incorporate these changes or improvements in items alreay manufacture. 35 USG Shaft Wall Systems

36 Application Guie Specifications This guie specification is provie to assist you in specification of USG shaft wall systems. If you have aitional questions or woul like more information regaring this or other USG proucts an systems, please contact USG at 800 USG.4YOU or visit usgesignstuio.com Part 1: General 1.1 Drawings an general provisions of the project contract, incluing General an Supplementary Conitions an Division 1 Relate Documents Specification Sections, apply to this Section. USG System Foler SA926 USG Shaft Wall Systems. 1.2 Specify the appropriate USG shaft wall system to meet project requirements for fire resistance, structural Scope performance, soun control an aesthetics. 1.3 A. This section inclues the following USG shaft wall systems Summary 1. Vertical shaft enclosures 2. Stair enclosures 3. Horizontal assemblies 4. Vent shaft enclosures B. Relate Sections: 1. Division 9 Bran Gypsum Panels an assemblies 2. Division 9 USG Imperial Bran Gypsum Base an Veneer Plaster Assemblies 1.4 A. Shaft Wall: An assembly of steel framing, gypsum boars an other materials use to enclose elevator shafts, Definitions stairways, air shafts an mechanical components. B. Gypsum Boar Construction Terminology: Refer to ASTM C11 for efinition of terms for gypsum boar construction not efine in this ocument. 1.5 A. The systems are UL Liste for fire resistance. Performance B. System fire-resistance testing with elevator oor manufacturer at UL. Requirements C. Fire-resistance teste penetration etails for call-button boxes an position inicators. D. Oscillation teste to 1 million cycles to ensure performance of the life of the builing. E. UL Liste fire amper application. F. Air Pressure Loas Select base on project requirements. See etails in this brochure for USG shaft wall system ata. G. Deflection Limit Select base on project requirements. See etails in this brochure for USG shaft wall system ata. H. STC Rating Select base on project requirements. I. Harene Shafts Where require by coe, for builings classifie as high-rise builings, special provisions may be require. 1.6 A. Prouct an System Data Submit system foler SA926, which can be ownloae at usg.com. Submittals B. Submit certification of manufacturer compliance with fire an soun requirements inicate. C. Fire rating compliance shall inclue verification of compatibility with labele elevator oor frame installation an test verification of call box an similar penetrations. 36 USG Shaft Wall Systems

37 Application Guie Specifications 1.7 A. Deliver materials in their original unopene packages bearing manufacturer ientification. Delivery, Storage B. Protect materials from wetting an amage from weather, irect sunlight, surface contamination, corrosion, construction an Hanling traffic an other causes. of Materials C. Warning: Store all Bran Gypsum Panels flat. Panels are heavy an can fall over, causing serious injury or eath. Do not move unless authorize. 1.8 A. All materials shall be suitably protecte from the weather uring installation to prevent amage to the shaft wall. Project Conitions B. Install gypsum panels following environmental conitions, room temperatures an ventilation specifie in the USG Gypsum Construction Hanbook. 1.9 A. Protect USG shaft wall system an components from moisture before, uring an after installation. Quality Assurance Eliminate sources of moisture immeiately. B. Fire-Resistance Rate Assemblies: Provie UL Design Number (e.g., U415) for basic systems. C. Soun-Rate Assemblies (STC) Provie soun-rate system whose materials an construction comply with requirements of ASTM E90 an are classifie accoring to ASTM E413 by a qualifie testing agency. D. Preinstallation Conference Conuct conference at project site. Review methos an proceures for work relate to USG shaft wall system assemblies. Part 2: Proucts 2.1 A. Supply materials manufacture by or for the Unite States Gypsum Company that comply with requirements of Manufacturer fire-resistance rate assemblies inicate in System Foler SA926. B. Basis of Design USG shaft wall system 2.2 A. Gypsum Liner Panels ASTM C1396, 1" Bran Gypsum Liner Panels, 100% recycle green face Materials an back paper, bevele ege, 24" wie, lengths as require. Stampe with UL Classification label ocumenting UL Classifications for fire resistance, surface burning characteristics, an noncombustibility. Panels shoul also be ientifie with the following language: Bran Gypsum Liner Panel, a Component of Unite States Gypsum Company Fire-Rate Systems. B. Bran Mol Tough Gypsum Liner Panels ASTM C1396, 1" Bran Mol Tough Gypsum Liner Panels, 100% recycle blue face an back paper, bevele ege, 24" wie, lengths as require. Stampe with UL Classification label ocumenting UL Classifications for fire resistance, surface burning characteristics, an noncombustibility. Panels shoul also be ientifie with the following language: Bran Mol Tough Gypsum Liner Panel, a Component of Unite States Gypsum Company Fire-Rate Systems. C. Bran Glass-Mat Liner Panels ASTM C1658, 1" Bran Glass-Mat Liner Panels, moisture- an mol-resistant gypsum core encase in a moisture- an mol-resistant glass mat on both sies, 24" wie, lengths as require. Stampe with UL Classification label ocumenting UL Classifications for fire resistance, surface burning characteristics an noncombustibility. Panels shoul also be ientifie with the following language: Bran Glass-Mat Liner Panel, a Component of Unite States Gypsum Company Fire-Rate Systems. 37 USG Shaft Wall Systems

38 Application Guie Specifications D. Gypsum Wallboar ASTM C1396, (1/2") (5/8") (3/4") (select thickness), 4' wie, tapere ege, Gypsum Base for Gypsum Veneer Plaster ASTM C1396, (1/2") (5/8") (select thickness), 4' wie, USG Imperial Bran Gypsum Panels, (USG Firecoe Core) (USG Firecoe C Core) (USG Ultracoe Core) (USG Mol Tough Firecoe Core), ASTM C1287 (USG Fiberock Bran Aqua-Tough Interior Panels) (USG Fiberock Bran Abuse-Resistant Interior Panels) (select core type), lengths as require. Ientifie with UL Classification label. E. Bran Gypsum Base (USG Firecoe Core) (USG Firecoe C Core) (select core type), lengths as require. F. Cement Boar ASTM C1325, USG Durock Bran Cement Boar, 1/2" an 5/8" thickness, 48" with x 96" length. G. Gypsum Wallboar an Gypsum Base Joint Treatment Materials Select a USG Interior Finishing System (see prouct foler J1424). H. Fasteners ASTM C1002, Screws: (3/8") (1/2") Type (S) (S-12) pan hea; 5/8" Type S-12 low profile hea; (1") (1-5/8") (2-1/4") Type S bugle hea. USG Durock Bran 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. Bran Paper-Face Metal Bea an Trim. K. Steel furring channels. L. RC-1 resilient channels or equivalent. M. USG steel C-H stus, (212CH-18) (212CH-34) (400CH-18) (400CH-34) (600CH-34) hot-ippe galvanize, lengths as require (select from tables). N. USG steel E-stus, (400ES-34) (600ES-34) hot-ippe galvanize, lengths as require (select from tables). O. s, (212JR-23) (400JR-23) (600JR-23) (212JR-34) (400JR-34) (600JR-34) hot-ippe galvanize. 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-ippe galvanize. R. Runner fasteners, power-riven type, to withstan require single shear an bearing force when riven through structural hea or base an without exceeing allowable esign stress in runner, fastener or structural support (obtain locally). S. Bran Acoustical Sealant. T. Soun batts (1") (1-1/2") (3"). U. Zinc control joint #093. Part 3: Execution 3.1 Examine substrates an abutting assemblies with installer present. Procee with installation after conitions Examination etermine to be satisfactory. 3.2 A. Check that system components are available to construct USG shaft wall system Preparation Bran Gypsum Liner Panels Bran Mol Tough Gypsum Liner Panels Bran Glass-Mat Liner Panels USG Firecoe, Firecoe C, Ultracoe, Ultracoe Core gypsum panels Bran Mol Tough Firecoe Core, USG Firecoe C Core or Ultracoe Core Gypsum Panels USG Durock Bran Cement Boar USG Fiberock Bran Abuse-Resistant Interior Panels 38 USG Shaft Wall Systems

39 Application Guie Specifications USG Fiberock Bran Aqua-Tough Interior Panels USG Imperial Bran Core or Firecoe C Core Gypsum Base USG steel framing components (C-H stus, J-runner, E-stus, jamb struts) B. Other fire-resistive elements/materials: Coorinate installation of USG shaft wall assembly with spraye fire-resistive materials an other fire-resistive elements so that both elements remain complete an unamage. 3.3 A. USG Steel Framing an Sheetrock Gypsum Liner Panels Shaft Wall 1. Position steel J-runners at floor an ceiling with the short leg towar finish sie of wall. Installation 2. Securely attach runners to structural supports with power-actuate fasteners at both ens an max. 24" o.c. 3. For attachment to steel frame construction, install floor an ceiling J-runners an J-runners or E-stus on columns an beams before steel is fireproofe. 4. For attachment to structural steel, use Z-shape stan-off clips secure to structural steel before fireproofing application. 5. Remove spray-fireproofing from J-runners an E-stus 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-toceiling height an erect vertically between J-runners. 7. Where shaft wall height shaft excees maximum available panel-length, pieces of gypsum liner panel must be butte together at factory-cut ens. a. Position gypsum liner panel en joints within upper an lower thir points of wall. b. Stagger joints top an bottom in ajacent panels. c. Screw stus to runners on walls over 16'. 8. Cut C-H stus 3/8" to not more than 1/2" less than floor-to-ceiling height. 9. Install C-H stus between gypsum liner panels with liner securely engage. 10. Terminations: Install full-length steel E-stus or J-runners vertically at T-intersections, corners, oor jambs an columns. 11. Openings: Frame with vertical E-stu or J-runner at vertical eges, horizontal J-runner at hea an 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 sie of elevator oor frames to act as strut-stus. 13. Steel Hinge Door Frames: Install floor-to-ceiling steel E-stus each sie to act as strut-stus. 14. Attach strut-stu (see 3.2.A.12 or 3.2.A.13) to floor an ceiling runners with two 3/8" Type S-12 pan hea screws. Attach strut-stus to jamb anchors with 1/2" Type S-12 screws. Over steel oors, install a cut-to-length section of J-Runner an attach to strut-stus with 3/8" Type S-12 screws. B. Resilient Channels 1. Install resilient channels (RC-1 or equivalent) horizontally to face of stus, within 6" of floor an ceiling. 2. Apply resilient channels a maximum of 24" o.c. vertically (with open face up). 3. Attach resilient channels to stus with 3/8" Type S screws riven through holes in mounting flange. 4. Splice channel by nesting irectly over stu; screw-attach through both flanges. Reinforce with screws at both ens of splice. 5. Install 1/2" x 3" wie continuous gypsum filler strips to top an bottom runner. 6. Gypsum panel application with resilient channel: Apply base layer horizontally to resilient channels with en joints staggere. Fasten with 1" Type S screws 12" o.c. Apply face layer vertically with joints staggere; attach to channels with 1-5/8" Type S screws 12" o.c. C. Bran Gypsum Panels Gypsum panels an fastening must be per the corresponing fire-resistance esign number that is the basis of esign. See the Performance Selector in this brochure for specific fire-resistance esign numbers. The system references below correspon to the Performance Selector foun on pages USG Shaft Wall Systems

40 Application Guie Specifications Per UL Design U415, Bran Gypsum Panels may be applie 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" Bran Firecoe Core Gypsum Panels to stus an 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" Bran Firecoe C Core Gypsum Panels. Apply base layer to stus with 1" Type S or S-12 (typical) screws. Space screws 24" o.c. along eges an in the fiel of the panels for vertical application, 16" o.c. for horizontal application. Apply face layer to stus an J-runners with 1-5/8" Type S or S-12 (typical) screws. Space screws 12" along the eges an in the fiel when applie vertically, 8" o.c. when applie horizontally. Stagger all joints between base an face layers. System D U415 or U459, two-hour fire-resistance rating. Install 1-1/2" Thermafiber SAFB mineral wool batts in stu cavity. Apply base layer of 5/8" Bran Firecoe C Core Gypsum Panels using 1" Type S or S-12 (typical) screws space 24" o.c. when boar is applie vertically. Space screws 16" o.c. when boar is applie horizontally. Apply face layer of 1/2" USG Durock Bran Cement Boar to C-H Stus with 1-5/8" USG Durock Tile Backer Screws space 8" o.c. System E U415 or U467, two-hour fire-resistance rating. Apply one layer 1/2" Bran Firecoe C Core Gypsum Panels to both sies of C-H stus. Fasten with 1" Type S or S-12 (typical) screws. Space screws 12" o.c. along the eges an in the fiel for vertical panel application, 8" o.c. for horizontal. System F U415, two-hour fire-resistance rating. Apply base layer 1/2" Bran Firecoe C Core Gypsum Panels to resilient channels with 1" Type S or S-12 (typical) screws space 24" o.c. Stagger en joints. Apply face layer 1/2" Bran Firecoe C Core Gypsum Panels with 1-5/8" Type S or S-12 (typical) screws space 12" o.c. System G U415, three-hour fire-resistance rating. Apply two layers of 5/8" Bran Firecoe C Core Gypsum Panels using Type S or S-12 (typical) screws space 12" o.c. Apply first an secon (inner) layers vertically or horizontally over room sie of steel C-H stus. When applie vertically, center joints between panels over stus. Stagger all joints a minimum 24". When panels are applie horizontally, stagger joints a minimum 12". Apply thir layer of 5/8" USG Sheetrock Bran Firecoe C Core Gypsum Panels vertically or horizontally over room sie of steel C-H stus using 2-1/4" Type S or S-12 (typical) screws. Space screws 16" o.c. when boar is applie vertically, 12" o.c. when boar is applie horizontally. System H U415, three-hour fire-resistance rating. Alternate to System G above. Apply thir layer of 5/8" USG Sheetrock Bran Firecoe C Core Gypsum Panels to other sie of steel C-H stus. Horizontal Assemblies Two-hour fire-resistance rating. Install three layers of 1/2" Bran Firecoe C Core Gypsum Panels to horizontally installe C-H an/or E-stus. Apply the base layer with 1" Type S or S-12 (typical) screws space 24" o.c. Apply the mi-layer in the same manner with joints offset 2' an attache with 1-5/8" Type S or S-12 (typical) screws space 12" o.c. Apply the face layer attache with 2-1/4" Type S or S-12 (typical) screws space 12" o.c. Place face layer en joints between stus an secure with 1-1/2" Type G screws 8" o.c. Horizontal Stu Shaft Wall 1. Attach horizontal J-runners at the floor an top of wall an vertical J-runners to structural supporting elements with power-actuate fasteners locate not greater than 2" from ens an space no more than 24" on center with short leg of J-runner towar the finish sie of the wall. 2. Install gypsum liner panels horizontally without butt joints, which limits the with of the wall to the available length of the liner panels. 3. Cut gypsum liner panels 1" less than the with of the wall, an center the panels between the vertical J-runners. The top ege of the uppermost liner panel to be cut 1" less than the wall height to clear the 1" leg of the top J-runner. 40 USG Shaft Wall Systems

41 Application Guie Specifications 4. Free ege of the uppermost an lower liner panels attache to the long leg of the top an bottom J-runners with 1-5/8" long Type S or S-12 steel screws space no greater than 12" on centers. 5. Cut C-H stus to maintain a 1/4" gap at each en of the wall. 6. Install C-H stus horizontally with the open C section of the stus facing own an space 24" on center. 7. Steel angles shoul be minimum 20 gauge, 2" x 2" x 2" for 4 C-H stus, an 2" x 2" x 4" for 6 C-H stus. Clips are centere uner an tight to the web of the C-H stus, but not attache to the stus. Clips are attache through the web of the vertical J-runners to the unerlying structural supporting element with a minimum of two 1/2" Type S-12 pan hea screws. 8. As an alternative to the preceing angle clip, fasten each en of the horizontal C-H stu to the vertical J-runner legs with 1/2" Type S-12 pan-hea steel screws on both sies of the wall. 9. En reactions of the horizontal C-H stus must be accommoate by the structural element require at the ens of the wall, an must be etermine by a license professional engineer. 10. The allowable height of the wall is preicate on the structural aequacy of the vertical structural elements. D. Bran Gypsum Panels (for vertical an horizontal shaft walls) Vent Shaft Enclosure U529, two-hour fire-resistance rating. Install 1" x 2" x 25" ga. galvanize steel angles as runners on floor, ceilings an partition ens. Fasten runners or angles securely to structure with suitable fasteners space 24" o.c. max. Install 1/2" Bran Firecoe C Core Gypsum Panels vertically. Fasten to angles with 1" Type S or S-12 (typical) screws space 12" o.c. Apply Bran Durabon Setting-Type Joint Compoun or Bran Easy San Lightweight Setting-Type Joint Compoun on back sie of liner panel an sheet-laminate to shaft-sie boar with vertical joints offset 12" from inner boar joints. Also screw to shaft sie boar with 1-1/2" long Type G screws space 24" o.c. in both irections. Laminate face boar to liner panels in similar manner. Install face boars vertically with joints offset 12" from liner panel joints. Apply pressure when placing boars to ensure goo ahesive bon an fasten to liner panel with 1-1/2" Type G screws, space 24" o.c. 3.4 A. Gypsum Panel Joints Finish all face layer joints an internal angles with a Bran interior finishing Accessory system installe accoring to manufacturer s irections. See prouct foler J1424 for etaile recommenations. Application B. Corner Bea Reinforce all vertical an horizontal exterior corners with Bran Paper-Face Bea. See prouct foler J1424 for etaile recommenations. C. Metal Trim Where shaft wall terminates against masonry or other issimilar material, apply Bran Paper-Face Metal Bea an Trim over face layer ege. 41 USG Shaft Wall Systems

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43 About the cover: Project Skybrige at One North Halste Chicago, IL Recipient of the 2004 AIA Honor Awar Architects Perkins & Will Ralph Johnson, FAIA Chicago, IL Photographer James Steinkamp

44 Websites usg.com usgesignstuio.com Technical Service 800 USG.4YOU Samples/Literature Samples/Literature Fax Customer Service Manufacture by Unite States Gypsum Company 550 West Aams Street Chicago, IL Prouct Information See usg.com for the most up-to-ate prouct information. Metric Specifications USG Corporation, through its operating subsiiaries, will provie metric conversions on its proucts an systems to help specifiers match metric esign sizes. In aition, some proucts are available in metric imensions from selecte manufacturing plants. Refer to SA100, Fire-Resistant Assemblies, for aitional information an a Table of Metric Equivalents. Traemarks The following traemarks use herein are owne by Unite States Gypsum or a relate company: Aqua-Tough, Durabon, Durock, Easy San, Fiberock, Firecoe, Imperial, Mol Tough, Plus 3, Sheetrock, Tuff-Hie, Ultracoe, USG. Type S an S-12 are traemarks of ITW builex. Thermafiber is a traemark of Thermafiber LLC. Notice We shall not be liable for inciental an consequential amages, irectly or inirectly sustaine, nor for any loss cause by application of these goos not in accorance with current printe instructions or for other than the intene use. Our liability is expressly limite to replacement of efective goos. Any claim shall be eeme waive unless mae in writing to us within thirty (30) ays from ate it was or reasonably shoul have been iscovere. Note All proucts escribe here may not be available in all geographic markets. Consult your local sales office or representative for information. Safety First! Follow goo safety an inustrial hygiene practices uring hanling an installation of all proucts an systems. Take necessary precautions an wear the appropriate personal protective equipment as neee. Rea material safety ata sheets an relate literature on proucts before specification an/or installation. SA926/rev USG Corporation an/or its affiliates. All rights reserve.