FIRE-RESISTANCE DESIGN

Assembly Usage Disclaimer

BXUV - Fire Resistance Ratings - ANSI/UL 263 Certified for United States

BXUV7 - Fire Resistance Ratings - CAN/ULC-S101 Certified for Canada

See General Information for Fire-resistance Ratings - ANSI/UL 263 Certified for United States
Design Criteria and Allowable Variances

See General Information for Fire Resistance Ratings - CAN/ULC-S101 Certified for Canada
Design Criteria and Allowable Variances

Design No. U435

June 14, 2019

Assembly Rating — 3 Hr or 4 Hr (See Item 4)

Nonbearing Wall

* Indicates such products shall bear the UL or cUL Certification Mark for jurisdictions employing the UL or cUL Certification (such as Canada), respectively.

    1. Studs — Channel-shaped, 1-5/8 in. wide by 1-1/4 in. deep, with 5/16 in. folded back return flange legs. Fabricated from No. 25 MSG galvanized steel. Stud spacing 16 or 24 in. OC. Studs to be cut 1 in. less than assembly height.
    1A. Framing Members* — Steel Studs — As an alternate to Item 1 — Channel shaped studs, min 1-5/8 in. wide, spaced a max of 24 in. OC. Studs to be cut 1 in. less than assembly height.

    ALLSTEEL & GYPSUM PRODUCTS INCType SUPREME D24/30EQD and Type SUPREME D20


    CONSOLIDATED FABRICATORS CORP, BUILDING PRODUCTS DIVType SUPREME D24/30EQD and Type SUPREME D20


    QUAIL RUN BUILDING MATERIALS INCType SUPREME D24/30EQD and Type SUPREME D20


    SCAFCO STEEL STUD MANUFACTURING COType SUPREME D24/30EQD and Type SUPREME D20


    STEEL CONSTRUCTION SYSTEMS INCType SUPREME D24/30EQD and Type SUPREME D20


    UNITED METAL PRODUCTS INCType SUPREME D24/30EQD and Type SUPREME D20


    1B. Framing Members* — Steel Studs — Not Shown — In lieu of Item 1 — For use with Item 2B, proprietary channel shaped steel studs, 1-1/4 in. deep by min 1-5/8 in. wide fabricated from min 0.018 in. thick galv steel. Attached to floor and ceiling with fasteners spaced 24 in. OC max. Studs to be cut 1 in. less than assembly height.

    CALIFORNIA EXPANDED METAL PRODUCTS COViper20™


    MARINO/WARE, DIV OF WARE INDUSTRIES INCViper20™


    FUSION BUILDING PRODUCTSViper20™


    IMPERIAL MANUFACTURING GROUP INCViper20™


    1C. Framing Members* — Steel Studs — Not Shown — In lieu of Item 1 — For use with Item 2C, proprietary channel shaped steel studs, 1-1/4 in. deep by min 1-5/8 in. wide fabricated from min 0.015 in. thick galv steel. Attached to floor and ceiling with fasteners spaced 24 in. OC max. Studs to be cut 1 in. less than assembly height.

    CLARKDIETRICH BUILDING SYSTEMSCD ProSTUD


    DMFCWBS L L CProSTUD


    MBA METAL FRAMINGProSTUD


    RAM SALES L L CRam ProSTUD


    STEEL STRUCTURAL PRODUCTS L L CTri-S ProSTUD


    1D. Framing Members* — Steel Studs — Not Shown — In lieu of Item 1 — For use with Item 2D, proprietary channel shaped steel studs, 1-1/4 in. deep by min 1-5/8 in. wide fabricated from min 0.018 in. thick galv steel. Attached to floor and ceiling with fasteners spaced 24 in. OC max. Studs to be cut 1 in. less than assembly height.

    TELLING INDUSTRIES L L CTRUE-STUD™


    1E. Framing Members* — Steel Studs — (As an alternate to Item 1, For use with Item 4C) Channel shaped, fabricated from min 20 MSG corrosion-protected or galv steel, 3-1/2 in. min width, min 1-1/2 in. flanges and 1/4 in. return, spaced a max of 16 in. OC. Studs friction-fit into floor and ceiling runners. Studs to be cut 5/8 to 3/4 in. less than assembly height.
    1F. Framing Members* — Steel Studs — Not Shown — In lieu of Item 1 — For use with Item 2F, proprietary channel shaped steel studs, 1-1/4 in. deep by min 1-5/8 in. wide fabricated from min 0.018 in. thick galv steel. Attached to floor and ceiling with fasteners spaced 24 in. OC max. Studs to be cut 1 in. less than assembly height.

    TELLING INDUSTRIES L L CViper20™


    1G. Framing Members* — Steel Studs — (As an alternate to Items 1 through 1F, for use with item 2G) Channel shaped, min. 1.97 in. wide by 1-1/4 in. deep. Fabricated from 25 MSG galv steel. Stud spacing 16 or 24 in. OC. Studs to be cut 1 in. less than assembly height.

    KIRII (HONG KONG) LTDType KIRII


    1H. Framing Members* — Steel Studs — In lieu of Item 1 — For use with Item 2H, proprietary channel shaped steel studs, min 1-5/8 in. wide (SmartStud20™), min 3-5/8 in. wide (SmartStud25™). Stud spacing 16 or 24 in. OC. Studs to be cut 1 in. less than assembly height.

    CRACO MFG INCSmartStud25™, SmartStud20™


    1I. Framing Members* — Steel Studs — Channel-shaped, 1-5/8 in. wide by 1-1/4 in. deep. Fabricated from No. 25 MSG galvanized steel. Stud spacing 16 or 24 in. OC. Studs to be cut 1 in. less than assembly height.

    EB METAL INCNITROSTUD


    1J. Framing Members* — Steel Studs — (As an alternate to Items 1 through 1I) Channel-shaped, min. 1-5/8 in. deep by min. 1-1/4 in. wide. Fabricated from No. 25 MSG galvanized steel. Stud spacing 16 or 24 in. OC. Studs to be cut 1 in. less than assembly height.

    OLMAR SUPPLY INCPRIMESTUD


    1K. Framing Members* — Steel Studs — As an alternate to Item 1 through 1J — For use with Item 2B (3-5/8 in. wide track), channel shaped studs, fabricated from min 25 MSG corrosion-protected steel, 1-1/4 in. wide by 3-5/8 in. deep, spaced a max of 24 in. OC. Studs to be cut 3/8 to 3/4 in. less than assembly height.

    MARINO/WARE, DIV OF WARE INDUSTRIES INCStudRite™


    1L. Framing Members* — Steel Studs — As an alternate to Item 1 - For use with Item 2I, channel shaped, min 3-5/8 in. wide, spaced a max of 24 in. OC. Studs to be cut 3/8 to 3/4 in. less than assembly height.

    BAILEY METAL PRODUCTS LTDType PLATINUM PLUS


    1M. Framing Members* — Steel Studs — Not Shown — In lieu of Item 1 — For use with Item 2J, proprietary channel shaped steel studs, 1-1/4 in. deep by min 3-1/2 in. wide fabricated from min 0.018 in. thick galv steel. Attached to floor and ceiling with fasteners spaced 24 in. OC max. Studs to be cut 1 in. less than assembly height.

    STEEL INVESTMENT GROUP L L CAlphaSTUD


    1N. Framing Members* — Steel Studs — As an alternate to Item 1 - For use with Item 2K - Channel-shaped, min. 1-5/8 in. deep by min. 1-1/4 in. wide. Fabricated from No. 25 MSG galvanized steel. Stud spacing 16 or 24 in. OC. Studs to be cut 3/8 to 3/4 in. less than assembly height.

    OEG BUILDING MATERIALSOEG Stud


    1O. Framing Members* — Steel Studs — Not Shown — In lieu of Item 1 — For use with Item 2L, proprietary channel shaped steel studs, 1-1/4 in. deep by min 1-5/8 in. wide fabricated from min 25 MSG (0.018 in. min. bare metal thickness). Attached to floor and ceiling with fasteners spaced 24 in. OC max. Studs to be cut 1 in. less than assembly height.

    CALIFORNIA EXPANDED METAL PRODUCTS COViper X


    1P. Framing Members* — Steel Studs — In lieu of Item 1 — For use with Item 2M, channel shaped studs, min 1-5/8 in. deep, spaced a max of 24 in. OC. Studs to be cut 3/4 in. less than assembly height.

    ALLSTEEL & GYPSUM PRODUCTS INCType SUPREME D25


    CONSOLIDATED FABRICATORS CORP, BUILDING PRODUCTS DIVType SUPREME D25


    QUAIL RUN BUILDING MATERIALS INCType SUPREME D25


    SCAFCO STEEL STUD MANUFACTURING COType SUPREME D25


    STEEL CONSTRUCTION SYSTEMS INCType SUPREME D25


    UNITED METAL PRODUCTS INCType SUPREME D25


    2. Floor and Ceiling Runners — Channel-shaped runners, min 1-5/8 in. wide by 1-1/4 in. deep, fabricated from No. 25 MSG galvanized steel. Attached to floor and ceiling with fasteners spaced 24 in. OC max.
    2A. Framing Members* — Floor and Ceiling Runners — As an alternate to Item 2 — Channel shaped, min 1-5/8 in. wide, attached to floor and ceiling with fasteners 24 in. OC. max.

    ALLSTEEL & GYPSUM PRODUCTS INCType SUPREME D24/30EQD and Type SUPREME D20


    CONSOLIDATED FABRICATORS CORP, BUILDING PRODUCTS DIVType SUPREME D24/30EQD and Type SUPREME D20


    QUAIL RUN BUILDING MATERIALS INCType SUPREME D24/30EQD and Type SUPREME D20


    SCAFCO STEEL STUD MANUFACTURING COType SUPREME D24/30EQD and Type SUPREME D20


    STEEL CONSTRUCTION SYSTEMS INCType SUPREME D24/30EQD and Type SUPREME D20


    UNITED METAL PRODUCTS INCType SUPREME D24/30EQD and Type SUPREME D20


    2B. Framing Members* — Floor and Ceiling Runner — Not Shown — In lieu of Item 2 — For use with Item 1B, proprietary channel shaped runners, 1-1/4 in. deep by min 1-5/8 in. wide fabricated from min 0.018 in. thick galv steel, attached to floor and ceiling with fasteners spaced 24 in. OC max.

    CALIFORNIA EXPANDED METAL PRODUCTS COViper20™ Track


    MARINO/WARE, DIV OF WARE INDUSTRIES INCViper20™ Track


    FUSION BUILDING PRODUCTSViper20™ Track


    IMPERIAL MANUFACTURING GROUP INCViper20™ Track


    2C. Framing Members* — Floor and Ceiling Runners — Not Shown — In lieu of Item 2 — For use with Item 1C, proprietary channel shaped runners, 1-1/4 in. deep by min 1-5/8 in. wide fabricated from min 0.015 in. thick galv steel, attached to floor and ceiling with fasteners spaced 24 in. OC max.

    CLARKDIETRICH BUILDING SYSTEMSCD ProTRAK


    DMFCWBS L L CProTRAK


    MBA METAL FRAMINGProTRAK


    RAM SALES L L CRam ProTRAK


    STEEL STRUCTURAL PRODUCTS L L CTri-S ProTRAK


    2D. Framing Members* — Floor and Ceiling Runners — Not Shown — In lieu of Item 2 — For use with Item 1D, proprietary channel shaped runners, 1-1/4 in. deep by min 1-5/8 in. wide fabricated from min 0.018 in. thick galv steel, attached to floor and ceiling with fasteners spaced 24 in. OC max.

    TELLING INDUSTRIES L L CTRUE-TRACK™


    2E. Framing Members* — Floor and Ceiling Runners — (Not Shown) — For use with Item 1E- Channel shaped, fabricated from min 20 MSG corrosion-protected or galv steel, min width to accommodate stud size, with min 1 in. long legs, attached to floor and ceiling with fasteners spaced max 24 in. OC.
    2F. Framing Members* — Floor and Ceiling Runner — Not Shown — In lieu of Item 2 — For use with Item 1F, proprietary channel shaped runners, 1-1/4 in. deep by min 1-5/8 in. wide fabricated from min 0.018 in. thick galv steel, attached to floor and ceiling with fasteners spaced 24 in. OC max.

    TELLING INDUSTRIES L L CViper20™ Track


    2G. Framing Members* — Floor and Ceiling Runners — (Not Shown) — For use with Item 1G - proprietary channel shaped runners, 1-1/4 in. deep by min 1.97 in. wide fabricated from 25MSG galv steel, attached to floor and ceiling with fasteners spaced 24 in. OC max.

    KIRII (HONG KONG) LTDType KIRII


    2H. Framing Members* — Floor and Ceiling Runners — (Not Shown) — In lieu of Item 2 — For use with Item 1H - proprietary channel shaped runners, min 1-5/8 in. wide (SmartTrack20™), min 3-5/8 in. wide (SmartTrack25™), attached to floor and ceiling with fasteners 24 in. OC max.

    CRACO MFG INCSmartTrack25™, SmartTrack20™


    2I. Framing Members* — Floor and Ceiling Runners — (Not Shown) — As an alternate to Item 2 - For use with Item 1L. Channel shaped, attached to floor and ceiling with fasteners 24 in. OC. max.

    BAILEY METAL PRODUCTS LTDType PLATINUM PLUS


    2J. Framing Members* — Floor and Ceiling Runners — Not Shown — In lieu of Item 2 — For use with Item 1M, proprietary channel shaped runners, 1-1/4 in. deep by min 3-1/2 in. wide fabricated from min 0.018 in. thick galv steel, attached to floor and ceiling with fasteners spaced 24 in. OC max.

    STEEL INVESTMENT GROUP L L CAlphaTRAK


    2K. Framing Members* — Floor and Ceiling Runners — (Not Shown) — As an alternate to Item 2 - For use with Item 1N. Channel shaped, attached to floor and ceiling with fasteners 24 in. OC. max.

    OEG BUILDING MATERIALSOEG Track


    2L. Framing Members* — Floor and Ceiling Runner — Not Shown — In lieu of Item 2 — For use with Item 1O, proprietary channel shaped runners, 1-1/4 in. deep by min 1-5/8 in. wide fabricated from min 25 MSG (0.018 in. min. bare metal thickness), attached to floor and ceiling with fasteners spaced 24 in. OC max.

    CALIFORNIA EXPANDED METAL PRODUCTS COViper X Track


    2M. Framing Members* — Floor and Ceiling Runners — (Not Shown) — In lieu of Item 2 - For use with Item 1P. Channel shaped, min. 1-5/8 in. deep, attached to floor and ceiling with fasteners 24 in. OC. max.

    ALLSTEEL & GYPSUM PRODUCTS INCType SUPREME D25


    CONSOLIDATED FABRICATORS CORP, BUILDING PRODUCTS DIVType SUPREME D25


    QUAIL RUN BUILDING MATERIALS INCType SUPREME D25


    SCAFCO STEEL STUD MANUFACTURING COType SUPREME D25


    STEEL CONSTRUCTION SYSTEMS INCType SUPREME D25


    UNITED METAL PRODUCTS INCType SUPREME D25


    3. Batts and Blankets* — (Optional) — Mineral wool insulation, partially or completely filling stud cavity.

    INDUSTRIAL INSULATION GROUP L L CType SAFB


    JOHNS MANVILLEType SAFB


    ROCK WOOL MANUFACTURING CODelta Board


    ROCKWOOLType AFB


    THERMAFIBER INCType SAFB, SAFB FF


    3A. Fiber, Sprayed* — As an alternate to Batts and Blankets (Item 3) — (100% Borate Formulation) — Spray applied cellulose material. The fiber is applied with water to completely fill the enclosed cavity in accordance with the application instructions supplied with the product with a nominal dry density of 2.7 lb/ft3. Alternate Application Method: The fiber is applied without water or adhesive at a nominal dry density of 3.5 lb/ft3, in accordance with the application instructions supplied with the product.

    U S GREENFIBER L L CINS735 & INS745 for use with wet or dry application. INS765LD and INS770LD are to be used for dry application only.


    3B. Fiber, Sprayed* — As an alternate to Batts and Blankets (Item 3) - Spray applied cellulose insulation material. The fiber is applied with water to interior surfaces in accordance with the application instructions supplied with the product. Applied to completely fill the enclosed cavity. Minimum dry density of 4.3 pounds per cubic ft.

    NU-WOOL CO INC Cellulose Insulation


    3C. Fiber, Sprayed* — As an alternate to Batts and Blankets (Item 3) — Spray applied cellulose fiber. The fiber is applied with water to completely fill the enclosed cavity in accordance with the application instructions supplied with the product. The minimum dry density shall be 4.30 lbs/ft3.

    INTERNATIONAL CELLULOSE CORPCelbar-RL


    3D. Fiber, Sprayed* — As an alternate to Batts and Blankets (Item 3) — Spray-applied cellulose material. The fiber is applied with water to completely fill the enclosed cavity in accordance with the application instructions supplied with the product. To facilitate the installation of the material, any thin, woven or non-woven netting may be attached by any means possible to the outer face the studs. The material shall reach equilibrium moisture content before the installation of materials on either face of the studs. The minimum dry density shall be 5.79 lbs/ft3.

    APPLEGATE HOLDINGS L L CApplegate Advanced Stabilized Cellulose Insulation


    4. Gypsum Board* — 1/2 in. thick, 4 ft wide with square or tapered edges. For 4 Hr Rating Four layers of gypsum board to be used. Inner layers to be applied vertically with joints centered over studs. Outer layer may be applied vertically or horizontally. First layer fastened to each stud with 1 in. long Type S, self-tapping steel screws. Second layer fastened to each stud through the first layer with 1-5/8 in. long, Type S, self-tapping steel screws. Third layer fastened to each stud through the first and second layers with 2-1/4 in. long, Type S, self-tapping steel screws. Fourth layer fastened to each stud through the first, second and third layers with 2-5/8 in. long, Type S, self-tapping steel screws. First layer screws shall be located 5 in. from top and bottom of wall with a maximum spacing of 48 in. O.C. vertically between top and bottom screws. Second and third layer screws shall be located 4 and 3 in., respectively, from the top and bottom of wall with the same vertical spacing as the first layer screws. Fourth layer screws shall be located 2 in. from top and bottom of wall and spaced 12 in. OC vertically. Each fourth layer horizontal board end shall be centered over and secured to the stud with screws spaced 1/2 in. from end joint and 12 in. OC vertically. Board end joints shall be staggered. At board side joints all screws shall be located 1/2in. from the joints. Fourth layer also secured to the second and third layers with 1-1/2in. long, Type G, self-tapping steel screws located midway between studs and 1 in. from the horizontal joint. Joints in each layer of gypsum board to be staggered from the joints in the adjacent layer and on opposite sides of studs.

    For 3 hr rating — Three layers of gypsum board to be used. Inner layers to be applied vertically with joints centered over studs. Outer layer may be applied vertically or horizontally. First layer fastened to each stud with 1 in. long, Type S, self-tapping steel screws. Second layer fastened to each stud through the first layer with 1-5/8 in. long, Type S, self-tapping steel screws. Third layer fastened to each stud through the first and second layers with 2-1/4 in. long, Type S, self-tapping steel screws. First and second layer screws shall be locate 4 and 3 in. from top and bottom of wall, respectively, with a maximum spacing of 48 in. OC vertically. The third layer screws shall be located 2 in. from top and bottom of wall with a maximum spacing of 12 in. OC vertically. Each third layer horizontal board end shall be centered over and secured to the stud with Type S, self-tapping steel screws spaced 1/2 in. from end joint and 12 in. OC vertically. Third layer, also secured to the first and the second layers with 1-1/2 in. long, Type G, Self-tapping steel screws located midway between studs and 1 in. from the horizontal joint. Board end joints shall be staggered. Vertical board joints to be staggered from the joints in the adjacent layer and on opposite sides of studs.

    CABOT MANUFACTURING ULCType C


    AMERICAN GYPSUM COTypes AG-C.


    CERTAINTEED GYPSUM INCType FRPC, Type C.


    CGC INCTypes C, IP-X2 IPC-AR.


    CONTINENTAL BUILDING PRODUCTS OPERATING CO, L L CType LGFC-C/A.


    GEORGIA-PACIFIC GYPSUM L L CTypes 5, DAPC, TG-C.


    NATIONAL GYPSUM COTypes eXP-C, FSK-C, FSW-G, FSW-C, FSMR-C.


    PABCO BUILDING PRODUCTS L L C, DBA PABCO GYPSUMType PG-C.


    SAINT-GOBAIN GYPROC MIDDLE EAST FZEType Gyproc FireStop, Gyproc FireStop MR, Gyproc FireStop M2TECH, Gyproc FireStop ACTIV'Air, Gyproc FireStop MR ACTIV'Air, Gyproc FireStop M2TECH ACTIV'Air


    THAI GYPSUM PRODUCTS PCLType C.


    UNITED STATES GYPSUM COTypes C, IP-X2, IPC-AR.


    USG BORAL DRYWALL SFZ LLCType C


    USG MEXICO S A DE C VTypes C, IP-X2, IPC-AR.


    For 3 hr rating — Two layers of 3/4 in. thick, 4 ft wide applied to each side of the steel studs. Inner layers to be applied vertically with joints centered over studs and staggered on opposite sides of studs. Outer layers to be applied horizontally with vertical butt joints staggered from inner layer joints or vertically with joints centered over studs and staggered on opposite sides of studs.

    Inner layer secured with 1-1/4 in. long Type S self-drilling, self-tapping steel screws spaced 24 in. OC along the perimeter and in the field. Outer layer, when secured horizontally, secured with 2-1/4 in. long Type S self-drilling, self-tapping steel screws spaced 24 in. OC along the perimeter and in the field along the horizontal joints of the outer layer, 1-1/2 in. long Type G self-drilling, self-tapping steel screws to be applied midway between the studs (24 in. OC) and 1 in. from the longitudinal joint. Outer layer, when secured vertically, secured with 2-1/4 in. long Type S self-drilling, self-tapping steel screws spaced 24 in. OC along the perimeter and in the field.

    CGC INCType IP-X3, ULTRACODE, ULTRACODE SHC or ULTRACODE WRC.


    UNITED STATES GYPSUM COType IP-X3, ULTRACODE, ULTRACODE SHC or ULTRACODE WRC.


    USG BORAL DRYWALL SFZ LLCType ULTRACODE


    USG MEXICO S A DE C VType IP-X3, ULTRACODE, ULTRACODE SHC or ULTRACODE WRC.


    4A. Gypsum Board* — (As an alternate to Item 4) — 5/8 in. thick. For 4 hr Rating — Four layers of gypsum board installed as described in Item 4, with fourth layer screw length increased by 1/4 in. For 3 hr Rating — Three layers of gypsum board installed as described in Item 4.

    CONTINENTAL BUILDING PRODUCTS OPERATING CO, L L CType LGFC-C/A


    NATIONAL GYPSUM COType FSMR-C.


    UNITED STATES GYPSUM COType ULIX


    4B. Gypsum Board* — (As an alternate to Item 4) — 5/8 in. thick. For 3 hr Rating — Three layers of gypsum board installed as described in Item 4.

    CONTINENTAL BUILDING PRODUCTS OPERATING CO, L L C Types LGFC6A, LGFC-WD, and LGFC2A.


    4C. Gypsum Board* — (Not Shown) — (As an alternate to Item 4 when used as the base layer on one or both sides of wall. For direct attachment only to steel studs Item 2C spaced 16 in. OC) - Nom 5/8 in. thick lead backed gypsum panels with beveled, square or tapered edges, applied vertically. Vertical joints centered over studs and staggered min 1 stud cavity on opposite sides of studs. Gypsum board secured to studs with 1-1/4 in. long Type S-12 steel screws spaced 8 in. OC at perimeter and 12 in. OC in the field.

    RAY-BAR ENGINEERING CORPType RB-LBG


    4D. Gypsum Board* — (Not Shown) — (As an alternate to Item 4 when used as the base layer on one or both sides of wall. For direct attachment only to steel studs Item 2C spaced 16 in. OC) - Nom 5/8 in. thick lead backed gypsum panels with beveled, square or tapered edges, applied vertically. Vertical joints centered over studs and staggered min 1 stud cavity on opposite sides of studs. Gypsum board secured to studs with 1-1/4 in. long Type S-12 steel screws spaced 8 in. OC at perimeter and 12 in. OC in the field. To be used with Lead Batten Strips (see Item 6A) or Lead Discs (see Item 7A).

    MAYCO INDUSTRIES INCType X-Ray Shielded Gypsum


    4E. Gypsum Board* — (Not Shown) — (As an alternate to Item 4 when used as the base layer on one or both sides of wall. For direct attachment only to steel studs Item 2C spaced 16 in. OC). Nom 5/8 in. thick lead backed gypsum panels with beveled, square or tapered edges, applied vertically. Vertical joints centered over studs and staggered min 1 stud cavity on opposite sides of studs. Wallboard secured to studs with 1-1/4 in. long Type S-12 steel screws gypsum panel steel screws spaced 8 in. OC at perimeter and 12 in. OC in the field. Lead batten strips required behind vertical joints of lead backed gypsum wallboard and optional at remaining stud locations. Lead batten strips, min 2 in. wide, max 8 ft long with a max thickness of 0.14 in. placed on the face of studs and attached to the stud with construction adhesive and two 1 in. long Type S-12 pan head steel screws, one at the top of the strip and one at the bottom of the strip. Lead discs, nominal 3/8 in. diam by max 0.085 in. thick. Compression fitted or adhered over the screw heads. Lead batten strips and discs to have a purity of 99.9% meeting the Federal specification QQ-L-201f, Grade "C".

    RADIATION PROTECTION PRODUCTS INCType RPP - Lead Lined Drywall


    5. Joint Tape and Compound — Vinyl or casein, dry or premixed joint compound applied in two coats to joints and screw heads. Paper tape, 2 in. wide, embedded in first layer of compound over all joints.
    6. Lead Batten Strips — (Not Shown, For Use With Item 4C) — Lead batten strips, min 1-1/2 in. wide, max 10 ft long with a max thickness of 0.125 in. Strips placed on the interior face of studs and attached from the exterior face of the stud with two 1 in. long Type S-12 pan head steel screws, one at the top of the strip and one at the bottom of the strip. Lead batten strips to have a purity of 99.9% meeting the Federal specification QQ-L-201f, Grade "C". Lead batten strips required behind vertical joints of lead backed gypsum board (Item 4C) and optional at remaining stud locations. Required behind vertical joints.
    6A. Lead Batten Strips — (Not Shown, for use with Item 4D) — Lead batten strips, 2 in. wide, max 10 ft long with a max thickness of 0.140 in. Strips placed on the face of studs and attached to the stud with two min. 1 in. long min. Type S-8 pan head steel screws, one at the top of the strip and one at the bottom of the strip or with one min. 1 in. long min. Type S-8 pan head steel screw at the top of the strip. Lead batten strips to have a purity of 99.5% meeting the Federal specification QQ-L-201f, Grades "B, C or D". Lead batten strips required behind vertical joints of lead backed gypsum wallboard and optional at remaining stud locations.
    7. Lead Discs or Tabs — (Not Shown, For Use With Item 4C) — Used in lieu of or in addition to the lead batten strips (Item 6) or optional at other locations - Max 3/4 in. diam by max 0.125 in. thick lead discs compression fitted or adhered over steel screw heads or max 1/2 in. by 1-1/4 in. by max 0.125 in. thick lead tabs placed on gypsum boards (Item 4C) underneath screw locations prior to the installation of the screws. Lead discs or tabs to have a purity of 99.9% meeting the Federal specification QQ-L-201f, Grade "C".
    7A. Lead Discs — (Not Shown, for use with Item 4D) — Max 5/16 in. diam by max 0.140in. thick lead discs compression fitted or adhered over steel screw heads. Lead discs to have a purity of 99.5% meeting the Federal Specification QQ-L-201f, Grades "B, C or D".

    * Indicates such products shall bear the UL or cUL Certification Mark for jurisdictions employing the UL or cUL Certification (such as Canada), respectively.

Last Updated on 2019-06-14
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  • Authorities Having Jurisdiction should be consulted in all cases as to the particular requirements covering the installation and use of UL Certified products, equipment, system, devices, and materials.
  • Authorities Having Jurisdiction should be consulted before construction.
  • Fire resistance assemblies and products are developed by the design submitter and have been investigated by UL for compliance with applicable requirements. The published information cannot always address every construction nuance encountered in the field.
  • When field issues arise, it is recommended the first contact for assistance be the technical service staff provided by the product manufacturer noted for the design. Users of fire resistance assemblies are advised to consult the general Guide Information for each product category and each group of assemblies. The Guide Information includes specifics concerning alternate materials and alternate methods of construction.
  • Only products which bear UL's Mark are considered Certified.

The appearance of a company's name or product in this database does not in itself assure that products so identified have been manufactured under UL's Follow-Up Service. Only those products bearing the UL Mark should be considered to be Certified and covered under UL's Follow-Up Service. Always look for the Mark on the product.

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