Georgia-Pacific Building Produts

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Gypsum Assemblies Library

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The information presented in this directory has been organized for ease of reference and is presented for illustration only. The information presented reflects the results of tests conducted on systems composed of specific materials assembled in a specific manner or independent approvals based on further evaluations or inferences from such tests. For more detailed information, please consult the testing agency’s fire resistance directory or listing.

For important product fire, safety and use information concerning Georgia-Pacific’s products, go to www.buildgp.com/safetyinfo.

Also see: UL & ULC Type Designations (PDF: 27KB/1pgs)

All Assemblies 0 Assembly design

1/2” (12.7 mm) ToughRock® Fireguard C® or 1/2” (12.7 mm) DensArmor Plus® Fireguard C® gypsum board applied vertically or horizontally to each side of 2” x 4” wood studs 16” (406 mm) o.c. with 1-5/8” (41 mm) cement coated nails spaced 7” (178 mm) o.c. Joints staggered.

45-minute
UL U317, cUL U317

5/8” (15.9 mm) ToughRock® Fireguard X™ or 5/8” (15.9 mm) DensArmor Plus® Fireguard® gypsum board applied vertically (ULC W301) or horizontally (UL U305) to each side of 2” x 4” wood studs 16” (406 mm) o.c. with 1-7/8” (48 mm) 6d coated nails spaced 7” (178 mm) o.c. Joints staggered. ULC W301 allows vertical application only.

1-hour
30-34 STC
UL U305, ULC W3011 and 3, cUL U305, GA WP 3605
OR 64-8
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5/8” (15.9 mm) ToughRock® Fireguard X™ or 5/8” (15.9 mm) DensArmor Plus Fireguard gypsum board applied vertically to each side of 2” x 4” wood studs 24” (610 mm) o.c. with 1-7/8” (48 mm) 6d coated nails 7” (178 mm) o.c. at joints and top and bottom plates and 3/8”(10 mm) beads of adhesive at intermediate studs. Joints staggered.

1-hour
35-39 STC
GA WP 3520
G&H NG-246FT
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5/8” (15.9 mm) ToughRock® Fireguard X™ or 5/8” (15.9 mm) DensArmor Plus Fireguard gypsum board applied vertically or horizontally to each side of 2” x 3” or 2” x 4” wood studs, turned flatwise 24” (610 mm) o.c. with 1-7/8” (48 mm) 6d cement coated nails 7” (178 mm) o.c. (non load-bearing).

1-hour
UL U338, cUL U338, GA WP 3640

Resilient channels 24” o.c. attached horizontally on one side of 2” x 4” wood studs 24” o.c. with 1-1/4” Type S drywall screws. One layer 5/8” (15.9 mm) ToughRock® Fireguard X™ or 5/8” (15.9 mm) DensArmor Plus® FireGuard® interior panels applied horizontally to channels with 1” Type S drywall screws 8” o.c. with vertical joints located mid way between studs. 3” mineral or glass fiber insulation in stud space. Opposite side: one layer 5/8” (15.9 mm) ToughRock® Fireguard X™ Products or 5/8” (15.9 mm) DensArmor Plus FireGuard interior panels applied horizontally or vertically to studs with 6d cement coated nails, 1 7/8” long, 0.0915” shank, 15/64” heads, 7” o.c. Vertical joints staggered 24” on opposite sides. Sound Tested with 3-1/2” (89 mm) fiberglass insulation

1-hour
50-54 STC
UL U309, cUL U309, GA WP 3243
RAL TL77-138
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5/8” (15.9 mm) ToughRock® Fireguard X™ or 5/8” (15.9 mm) DensArmor Plus Fireguard gypsum board applied vertically or horizontally to each side of 2” x 4” wood studs 16” (406 mm) o.c. staggered 8” (203 mm) o.c. on 2” x 6” wood plates with 1-7/8” (48 mm) 6d coated nails 7” (178 mm) o.c. Wallboard nailed to top and bottom plates 7” (178 mm) o.c. Stagger joints each side. Horizontal bracing required at mid height. ULC W301 allows vertical application only.

1-hour
40-44 STC
UL U305, ULC W3011 and 3, cUL U305, GA WP 5512
NRCC TL-93-254 & IRC-IR-761
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5/8” (15.9 mm) ToughRock® Fireguard X™ or 5/8” (15.9 mm) DensArmor Plus Fireguard gypsum board applied vertically (or horizontally to each side of double row of 2” x 4” wood studs 16” (406 mm) o.c. on separate plates 1” (25 mm) apart with 1-7/8” (48 mm) 6d coated nails 7” (178 mm) o.c. Wallboard nailed to top and bottom plates 7” (178 mm) o.c. Stagger joints each side. Horizontal bracing required at mid height. ULC W301 allows vertical application only.

1-hour
45-49 STC
UL U305, ULC W3011 and 3, cUL U305, GA WP 5512
NRCC TL-93-261 & IRC-IR-761
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Base Layer: 5/8” (15.9 mm) ToughRock® Fireguard X™ or 5/8” (15.9 mm) DensArmor Plus® Fireguard® gypsum board applied vertically or horizontally using 1-7/8” (48 mm) 6d coated nails 6” (152 mm) o.c. to each side of 2” x 4” wood studs 16” (406 mm) o.c. Face Layer: 5/8” (15.9 mm) ToughRock® Fireguard X™ Products or 5/8” (15.9 mm) DensArmor Plus Fireguard gypsum board applied vertically or horizontally to studs over base layer with 2-3/8” (60 mm) 8d coated nails 8” (203 mm) o.c. Stagger joints 16” (406 mm) o.c. each layer and side. Sound Tested with studs 16” (406 mm) o.c. and with nails for base layer spaced 6” (152 mm) o.c.

2-hour
40-44 STC
UL U301, cUL U301
NGC 2363
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Exterior: Two layers 5/8” (15.9 mm) DensGlass Fireguard Sheathing applied vertically or horizontally to 2 x 4 wood studs 16” (406 mm) o.c. Base layer attached with 1-7/8” (48 mm) galvanized roofing nails 16” (406 mm) o.c. Face layer attached with 2-3/8” (60 mm) galvanized roofing nails 8” (203 mm) o.c. Stagger joints between layers and on base layer of both sides. Interior: Two layers 5/8” (15.9 mm) DensArmor Plus Fireguard or 5/8” (15.9 mm) ToughRock® Fireguard X™ applied horizontally or vertically to framing. Base layer attached with 1-7/8” (48 mm) 6d cement coated nails 6” (152 mm) o.c. Face layer attached with 2-3/8” (60 mm) 6d cement coated nails 8” (203 mm) o.c. Stagger joints between layers and on base layer of both sides. Sound tested with studs 16” (406 mm) o.c. and nails for base layer spaced 6” (152 mm) o.c.

2-hour
40-44 STC
UL U301, cUL U301
NGC 2363
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Base Layer: 5/8” (15.9 mm) ToughRock® Fireguard X™ or 5/8” (15.9 mm) DensArmor Plus Fireguard gypsum board applied horizontally to each side of 2” x 4” wood studs 16” (406 mm) o.c. staggered 8” (203 mm) o.c. on 2”x 6” wood plates with 1-7/8” (48 mm) 6d coated nails 24” (610 mm) o.c. Face Layer: 5/8” (15.9 mm) ToughRock® Fireguard X™ or 5/8” (15.9 mm) DensArmor Plus Fireguard gypsum board applied horizontally to studs with 2-3/8” (60 mm) 8d coated nails 8” (203 mm) o.c. Stagger vertical joints 16” (406 mm) o.c. each layer and side. Horizontal bracing required at mid height. Sound Tested with nails for base layer spaced 6” (152 mm) o.c.

2-hour
50-54 STC
GA WP 3910
NGC-2377
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Base Layer: 5/8" (15.9 mm) ToughRock® Fireguard X™ or 5/8" (15.9 mm) DensArmor Plus fireguard gypsum board applied horizontally to each side of double row of 2" x 4" wood studs 16" (406 mm) o.c. on separate plates 1" (25 mm) apart with 1-7/8" (48 mm) 6d coated nails 24" (610 mm) o.co. Face Layer: 5/8" (15.9 mm) ToughRock® Fireguard X™ or 5/8" (15.9 mm) DensArmor Plus Fireguard gypsum board applied horizontally to each side with 2-3/8" (60 mm) 8d coated nails 8" (203 mm) o.c. Stagger vertical joints 16" (406 mm) o.c. each layer and side. Horizontal bracing required at mid height. Sound Tested with 3-1/2" (89 mm) fiberglass insulation stapled to studs in stud spaces on one side.

2-hour
55-59 STC
GA WP 3820
NGC-3056
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ToughRock® Fireguard C® Products

1/2” (12.7 mm) ToughRock® Fireguard C®gypsum board applied vertically to each side of 2-1/2” (64 mm) steel studs 24” (610 mm) o.c. with 1” (25 mm) Type S drywall screws 8” (203 mm) o.c. at vertical joints and 12” (305 mm) o.c. at intermediate studs. 1-1/2” (38 mm) mineral fiber insulation, stapled to board in stud space. Joints staggered. Sound Tested with 2” (51 mm) mineral fiberglass insulation

1-hour
45-49 STC
ULC W4121, GA WP 1070
RAL TL69-42
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5/8” (15.9 mm) ToughRock® Fireguard X™ or 5/8” (15.9 mm) DensArmor Plus® Fireguard® gypsum board applied vertically to each side of 3-5/8” (92 mm) steel studs 24” (610 mm) o.c. with 1” (25 mm) Type S drywall screws 8” (203 mm) o.c. at edges and 12” (305 mm) o.c. at intermediate studs. Sound Tested with 3” (76 mm) mineral fiber, 2.5 pcf (40.1 kg/m3), in stud space.

1-hour
45-49 STC
UL U465, ULC W4153, cUL U465, GA WP 10812
RAL TL99-103
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Exterior: 5/8” (15.9 mm) DensGlass® Fireguard® Sheathing applied vertically to min. 3-5/8” (92 mm) corrosion resistant 25-gauge (18 mils) steel studs 24” (610 mm) o.c. with 1” (25 mm) corrosion resistant bugle head screws 8” (203 mm) o.c. at board edges and 8” (203 mm) at intermediate studs. Interior: 5/8” (15.9 mm) DensArmor Plus® Fireguard® or 5/8” (15.9 mm) ToughRock® Fireguard X™ applied vertically to framing with 1” (25 mm) Type S bugle head screws 8” (203 mm) o.c. at board edges and 12” (305 mm) at intermediate studs.

1-hour
45-49 STC
UL U465, ULC W4151 and 3, cUL U465, GA WP 10812
RAL TL99-103
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Base Layer: 1/4” (6.4 mm) ToughRock® gypsum board applied vertically to each side of 1-5/8” (41 mm) steel studs 24” (610 mm) o.c. with 1” (25 mm) Type S drywall screws 24” (610 mm) o.c. at vertical joints and 36” (914 mm) o.c. at intermediate studs. Face Layer: 1/2” (12.7 mm) ToughRock Fireguard C or 1/2” (12.7 mm) DensArmor Plus Fireguard C gypsum board applied vertically to each side with 1-5/8” (41 mm) Type S drywall screws 12” (305 mm) o.c. Stagger joints.

1-hour
45-49 STC
GA WP 1090
ACI 7-115 2019c
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1/2” (12.7 mm) ToughRock® Fireguard C® or 1/2” (12.7 mm) DensArmor Plus® Fireguard C® gypsum board applied horizontally to one side of 3-5/8” (92 mm) steel studs 24” (610 mm) o.c. with 1” (25 mm) Type S drywall screws 8” (203 mm) o.c. to vertical joints and 12” (305 mm) o.c. to intermediate studs. Studs attached to top and bottom runner with Type S pan head screws. Opposite Side Base Layer: 1/2” (12.7 mm) ToughRock Fireguard C or 1/2” (12.7 mm) DensArmor Plus Fireguard C gypsum board applied horizontally to studs with 1” (25 mm) Type S drywall screws 24” (610 mm) o.c. Face Layer: 1/2” (12.7 mm) ToughRock Fireguard C or 1/2” (12.7 mm) DensArmor Plus Fireguard C gypsum board applied horizontally to framing with 1-5/8” (41 mm) Type S drywall screws 8” (203 mm) o.c. at end joints and 12” (305 mm) o.c. at perimeter and intermediate studs. Stagger vertical joints 24” (610 mm) o.c. Stagger horizontal joints 24” (610 mm) o.c. each layer and side. Fiberglass insulation, 2-3/4” (70 mm) thick, 0.30 pcf (4.8 kg/m3), friction fit in stud space.

1-hour
50-54 STC
WHI 495-06143, GA WP 10232
RAL TL88-54
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5/8” (15.9 mm) ToughRock® Fireguard X™ or 5/8” (15.9 mm) DensArmor Plus® Fireguard® gypsum board applied vertically or horizontally to each side of 3-5/8” (92 mm) steel studs 24” (610 mm) o.c. with 1” (25 mm) Type S drywall screws 8” (203 mm) o.c. at vertical joints and 12” (305 mm) o.c. at wall perimeter and intermediate studs. Studs attached to top and bottom runner with Type S pan head screws. Face Layer: 5/8” (15.9 mm) ToughRock® Fireguard X™ or 5/8” (15.9 mm) DensArmor Plus Fireguard gypsum board applied vertically or horizontally to one side with 1-5/8” (41 mm) Type S drywall screws 12” (305 mm) o.c. Sound Tested with 3-1/2” (89 mm) fiberglass insulation friction fit in stud space

1-hour
50-54 STC
GA WP 1052
NRCC 817-NV
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5/8” (15.9 mm) ToughRock® Fireguard X™ or 5/8” (15.9 mm) DensArmor Plus Fireguard gypsum board applied vertically to a double row of 1-5/8” (41 mm) steel studs 24” (610 mm) o.c. and not less than 1” (25 mm) apart with 1” (25 mm) Type S drywall screws 8” (203 mm) o.c. at edges and top and bottom runners, 12” (305 mm) o.c. in field. Stagger joints 24” (610 mm) each side. 5/8” (15.9 mm) gypsum board pieces 12” (305 mm) long x 4-1/2” (114 mm) wide located at 1/3 points used as cross braces fastened to stud pairs with three 1” (25 mm) Type S drywall screws at each end of brace. Optional 25-gauge (18 mils), stud or runner pieces not less than 4-1/2” (114 mm) long may be used as cross braces and attached with two No. 8, 1/2” (13 mm) self-drilling steel screws at each end. Sound Tested with 3-1/2” (89 mm) fiberglass insulation, stapled to one side in cavity

1-hour
50-54 STC
UL U420, cUL U420, GA WP 5015
RAL TL76-155
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Base Layer: 5/8” (15.9 mm) ToughRock® Fireguard X™ (UL V487 only) or 5/8” (15.9 mm) DensArmor Plus Fireguard gypsum board applied horizontally or vertically to each side of 1-5/8” (41 mm) steel studs 24” (610 mm) o.c. with 1” (25 mm) Type S screws 24” (610 mm) o.c. Face Layer: 5/8” (15.9 mm) ToughRock® Fireguard X™ (UL V487 only) or 5/8” (15.9 mm) DensArmor Plus Fireguard gypsum board applied horizontally or vertically to each side with 1-5/8” (41 mm) Type S screws 16” (406 mm) o.c. Vertical joints centered over studs and staggered one stud cavity on opposite sides of studs. Vertical joints in adjacent layers staggered one stud cavity. Horizontal joints need not be backed by steel framing. Horizontal edge joints and horizontal butt joints on opposite sides of studs need not be staggered. Horizontal edge joints and horizontal butt joints in adjacent layers staggered a min of 12” (305 mm)

2-hour
UL V487, ULC W482, cUL V487, GA WP 19482

Base Layer: 5/8” (15.9 mm) ToughRock® Fireguard X™ or 5/8” (15.9 mm) DensArmor Plus Fireguard gypsum board applied vertically to each side of 2-1/2” (64 mm) steel studs 24” (610 mm) o.c. with 1” (25 mm) Type S screws 16” (406 mm) o.c. Face Layer: 5/8” (15.9 mm) ToughRock® Fireguard X™ or 5/8” (15.9 mm) DensArmor Plus Fireguard gypsum board applied vertically to each side with drywall adhesive or secured with 1-5/8” (41 mm) Type S screws 12” (305 mm) o.c. at top and bottom track, 16” (406 mm) o.c. at edge joints and intermediate framing. Stagger joints 24” (610 mm) each layer and side. Sound Tested with 2-1/2” (64 mm) fiberglass insulation

2-hour
50-54 STC
UL U411, cUL U411
WHI 218-1
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Exterior: Two layers 5/8” (15.9 mm) DensGlass Fireguard Sheathing applied vertically to min. 2-1/2” (64 mm) corrosion resistant 25-gauge (18 mils) steel studs 24” (610 mm) o.c. Base layer attached with 1” (25 mm) Type S corrosion resistant bugle head screws 16” (406 mm) o.c. Face layer attached with 1-5/8” (41 mm) Type S corrosion resistant bugle head screws spaced 8” (203 mm) o.c. Joints staggered. Interior: Two layers 5/8” (15.9 mm) DensArmor Plus Fireguard or 5/8” (15.9 mm) ToughRock® Fireguard X™ applied vertically to framing. Base layer attached with 1” (25 mm) Type S bugle head screws 16” (406 mm) o.c. Face layer attached with 1-5/8” (41 mm) Type S bugle head screws spaced 16” (406 mm) o.c. in the field and along vertical edges and 12” (305 mm) o.c. to the floor and ceiling runners. Joints staggered. Batt or blanket insulation optional. Sound tested with 2-1/2” fiberglass insulation.

2-hour
50-54 STC
UL U411, cUL U411
WHI 218-1
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Base Layer: 5/8” (15.9 mm) ToughRock® Fireguard X™ or 5/8” (15.9 mm) DensArmor Plus Fireguard gypsum board applied vertically to each side of 3-5/8” (92 mm) steel studs 24” (610 mm) o.c. with 1” (25 mm) Type S screws 16” (406 mm) o.c. Face Layer: 5/8” (15.9 mm) ToughRock® Fireguard X™ or 5/8” (15.9 mm) DensArmor Plus Fireguard gypsum board applied vertically to each side with drywall adhesive or secured with 1-5/8” (41 mm) Type S screws 12” (305 mm) o.c. at top and bottom track, 16” (406 mm) o.c. at edge joints and intermediate framing. Stagger joints 24” (610 mm) each layer and side. Sound Tested with 3-1/2” (89 mm) fiberglass insulation, friction fit in 3-5/8” (92 mm) stud space

2-hour
55-59 STC
UL U411, cUL U411, GA WP 1522
NRCC 818-NV
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Base Layer: 1/2” (12.7 mm) ToughRock® Fireguard C® or 1/2” (12.7 mm) DensArmor Plus® Fireguard C® gypsum board applied vertically to each side of 1-5/8” (41 mm) steel studs 24” (610 mm) o.c. with 1” (25 mm) Type S drywall screws 24” (610 mm) o.c. Face Layer: 1/2” (12.7 mm) ToughRock Fireguard C or 1/2” (12.7 mm) DensArmor Plus Fireguard C gypsum board applied vertically to each side with 1-5/8” (41 mm) Type S drywall screws 12” (305 mm) o.c. Joints staggered 24” (610 mm) each layer and side.

2-hour
45-49 STC
UL U412, cUL U412
NGC 2250
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Base Layer: 1/2” (12.7 mm) ToughRock Fireguard C or 1/2” (12.7 mm) DensArmor Plus Fireguard C gypsum board applied vertically to each side of 2-1/2” (64 mm) steel studs 24” (610 mm) o.c. with 1” (25 mm) Type S drywall screws 24” (610 mm) o.c. Face Layer: 1/2” (12.7 mm) ToughRock Fireguard C or 1/2” (12.7 mm) DensArmor Plus Fireguard C gypsum board applied vertically to each side with 1-5/8” (41 mm) Type S drywall screws 12” (305 mm) o.c. Joints staggered 24” (610 mm) each layer and side. Sound Tested with 2-1/2” (64 mm) fiberglass insulation stapled in stud space

2-hour
50-54 STC
ULC W414, GA WP 1546
NRCC 798-NV
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Base Layer: 1/2” (12.7 mm) ToughRock Fireguard C or 1/2” (12.7 mm) DensArmor Plus Fireguard C gypsum board applied vertically to each side of 3-5/8” (92 mm) steel studs 24” (610 mm) o.c. with 1” (25 mm) Type S drywall screws 24” (610 mm) o.c. Face Layer: 1/2” (12.7 mm) ToughRock Fireguard C or 1/2” (12.7 mm) DensArmor Plus Fireguard C gypsum board applied vertically to each side with 1-5/8” (41 mm) Type S drywall screws 12” (305 mm) o.c. Joints staggered 24” (610 mm) each layer and side. Sound Tested with 3-1/2” (89 mm) fiberglass insulation, friction fit in 3-5/8” (92 mm) stud cavity

2-hour
55-59 STC
ULC W414, GA WP 1521
NRCC 815-NV
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Base Layer: 1/2” (12.7 mm) ToughRock® Fireguard C® gypsum board applied horizontally to each side of 2-1/2” (64 mm) steel studs 24” (610 mm) o.c. with 1” (25 mm) Type S drywall screws 12” (305 mm) o.c. Face Layer: 5/8” (15.9 mm) ToughRock® Fireguard® gypsum board applied vertically to each side. Vertical joints midway between studs. Face layer attached to base layer only with 1-1/2” (38 mm) Type G drywall screws 12” (305 mm) o.c. at vertical joints and center line of face layer gypsum board. 3/8” (10 mm) to 1/2” (13 mm) diameter adhesive beads around the perimeter of face board, 2” (51 mm) from each edge and end, and in the form of an X joining the corners of the perimeter beads are optional. Joints staggered 24” (610 mm) each layer and side. Sound Tested with adhesive attachment and 2-1/2” (64 mm) fiberglass insulation, friction fit in stud space

2-hour
55-59 STC
ULC W4041, GA WP 15052
DRC 70-18-2
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Base Layer: 5/8” (15.9 mm) ToughRock® Fireguard X™ or 5/8” (15.9 mm) DensArmor Plus® Fireguard® applied vertically to a double row of 1-5/8” (41 mm) steel studs 24” (610 mm) o.c. and not less than 1” (25 mm) apart with 1” (25 mm) Type S drywall screws 8” (203 mm) o.c. at edges and 12” (305 mm) o.c. at intermediate studs. 5/8” (15.9 mm) gypsum board pieces 12” (305 mm) long x not less than 4-1/2” (114 mm) wide located at 1/3 points used as cross braces fastened to stud pairs with three 1” (25 mm) Type S drywall screws at each end of brace. Optionally 25-gauge (18 mils) stud or runner pieces, not less than 4-1/2” (114 mm) long, may be used as cross braces and attached with two No. 8 x 1/2” (13 mm) self-drilling steel screws at each end. Where total cavity depth exceeds 9-1/2” (241 mm), cross braces shall be fabricated with 25-gauge (18 mils) stud or runner pieces. Face Layer: 5/8” (15.9 mm) ToughRock® Fireguard X™ or 5/8” (15.9 mm) DensArmor Plus Fireguard applied vertically to each side with 1-5/8” (41 mm) Type S drywall screws 8” (203 mm) o.c. at joints and floor and ceiling runners and 12” (305 mm) o.c. at intermediate studs. Sound Tested with 3-1/2” (89 mm) fiberglass insulation stapled in stud space

2-hour
55-59 STC
UL U420, cUL U420, GA WP 5105
RAL TL76-156
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Base Layer: 5/8” (15.9 mm) ToughRock® Fireguard X™ or 5/8” (15.9 mm) DensArmor Plus® Fireguard® gypsum board applied vertically to each side of 3-1/2” (89 mm) 20-gauge (30 mils) steel studs 24” (610 mm) o.c. with 1” (25 mm) Type S-12 drywall screws 12” (305 mm) o.c. Face Layer: 5/8” (15.9 mm) ToughRock® Fireguard X™ or 5/8” (15.9 mm) DensArmor Plus Fireguard gypsum board applied vertically to each side with 1-5/8” (41 mm) Type S-12 drywall screws 12” (305 mm) o.c. Studs attached to each side of the floor and ceiling runners by welding or with 1/2” (12.7 mm) Type S-12 panhead screws. Joints staggered 24” (610 mm) each layer and side. Bracing: Lateral bracing spaced not over 40” (1,016 mm) o.c. shall be 1” (25 mm) by 18-gauge (43 mils) steel straps attached to each side or channel bracing attached to each stud with a clip angle. For studs with holes or punch-outs in the web the “Q” factor shall be determined by means of stub column tests. Tested at 80 percent of design load. (LIMITED LOAD-BEARING)

2-hour
40-44 STC
UL U425, cUL U425, GA WP 1716
NGC 2250
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Exterior: Two layers 5/8” (15.9 mm) DensGlass Fireguard Sheathing applied vertically to min. 3-1/2” (89 mm) corrosion resistant 20-gauge (30 mils) steel studs 24” (610 mm) o.c. Base layer attached with 1” (25 mm) Type S-12 corrosion resistant bugle head screws 8” (203 mm) o.c. Face layer attached with 1-5/8” (41 mm) Type S-12 corrosion resistant bugle head screws spaced 8” (203 mm) o.c. Joints staggered. Interior: Two layers 5/8” (15.9 mm) DensArmor Plus Fireguard or 5/8” (15.9 mm) ToughRock® Fireguard X™ Products applied vertically to framing. Base layer attached with 1” (25 mm) Type S-12 bugle head screws 12” (305 mm) o.c. Face layer attached with 1-5/8” (41 mm) Type S-12 bugle head screws spaced 12” (305 mm) o.c. Joints staggered. Insulation to completely fill stud cavity. (Load Bearing: 80% of design load)

2-hour
40-44 STC
UL U425, cUL U425, GA WP 1716
NGC 2250
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25-gauge (18 mils) resilient channels 24” (610 mm) o.c. attached horizontally to one side of 3-1/2” (89 mm) 20-gauge (30 mils) steel studs 24” (610 mm) o.c. with one 1/2” (13 mm) Type S-12 drywall screw at each stud. Base Layer: 1/2” (12.7 mm) ToughRock® Fireguard C® or 1/2” (12.7 mm) DensArmor Plus® Fireguard C® gypsum board applied horizontally to channels with 1” (25 mm) Type S drywall screws 24” (610 mm) o.c. Face Layer: 1/2” (12.7 mm) ToughRock Fireguard C or 1/2” (12.7 mm) DensArmor Plus Fireguard C gypsum board applied horizontally to channels with 1-5/8” (41 mm) Type S drywall screws 12” (305 mm) o.c. 3” (76 mm) mineral fiber insulation, friction fit in stud space. Opposite Side: One layer 1/2” (12.7 mm) ToughRock Fireguard C or 1/2” (12.7 mm) DensArmor Plus Fireguard C gypsum board applied vertically to studs with 1” (25 mm) Type S-12 drywall screws 12” (305 mm) o.c. Joints staggered 24” (610 mm) each layer and side.

2-hour
UL U453, cUL U453, GA WP 15202

Resilient channels 24” (610 mm) o.c. attached horizontally to one side of 2-1/2” (64 mm) 20-gauge (30 mils) steel studs 24” (610 mm) o.c. with one 1/2” (12.7 mm) Type S drywall screw at each stud. Base Layer: 1/2” (12.7 mm) ToughRock Fireguard C gypsum board or 1/2” (12.7 mm) DensArmor Plus Fireguard C interior panels applied horizontally to channels with 1” (25 mm) Type S drywall screws 24” (610 mm) o.c. Face Layer: 1/2” (12.7 mm) ToughRock Fireguard C gypsum board or 1/2” (12.7 mm) DensArmor Plus Fireguard C interior panels applied horizontally to channels with 1-5/8” (41 mm) Type S drywall screws 12” (305 mm) o.c. 3” (76 mm) mineral fiber insulation, 2 pcf (32 kg/m3), friction fit in stud space. Opposite Side Base Layer: 1/2” (12.7 mm) ToughRock Fireguard C gypsum board or 1/2” (12.7 mm) DensArmor Plus Fireguard C interior panels applied vertically to studs with 1-5/8” (41 mm) Type S drywall screws 24” (610 mm) o.c. Face Layer: 1/2” (12.7 mm) ToughRock Fireguard C gypsum board applied vertically to studs with 1-5/8” (41 mm) Type S drywall screws 12” (305 mm) o.c. Joints staggered.

2-hour
UL U454, cUL U454, GA WP 14702

1/2” (12.7 mm) ToughRock® Fireguard C® or 1/2” (12.7 mm) DensArmor Plus® Fireguard C® gypsum board applied vertically to each side of 1” (25.4 mm) DensGlass® Shaftliner or ToughRock® Shaftliner with laminating compound combed over entire surface. Floor and ceiling track of wood or steel runners. Joints staggered. Test conducted with generic Type X board in December 1959. Contact GP Technical Service Hotline for a copy of the test report.

2-hour
35-39 STC
OSU T-1339
NGC 2359
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Base Layer: 1/2” (12.7 mm) ToughRock® Fireguard C® gypsum board or 1/2” (12.7 mm) DensArmor Plus® Fireguard C® interior panels applied vertically to each side of 1-5/8” (41 mm) metal studs 24” (610 mm) o.c. with joints staggered 24” (610 mm) each side using 1” (25 mm) Type S drywall screws 12” (305 mm) o.c. Second Layer: 1/2” (12.7 mm) ToughRock Fireguard C gypsum board or 1/2” (12.7 mm) DensArmor Plus Fireguard C interior panels applied vertically to each side with joints 8” (203 mm) from studs staggered 24” (610 mm) each side attached to studs with 1-5/8” (41 mm) Type S drywall screws 24” (610 mm) o.c. and to base layer with 1-1/2” (38 mm) Type G drywall screws 12” (305 mm) o.c. spaced 1-1/2” (38 mm) from vertical edges. Face Layer: 1/2” (12.7 mm) ToughRock Fireguard C gypsum board or 1/2” (12.7 mm) DensArmor Plus Fireguard C interior panels applied horizontally to each side with joints offset 24” (610 mm) and attached to studs with 2” (51 mm) Type S drywall screws 12” (305 mm) o.c. and with 1-1/2” (38 mm) Type G drywall screws 24” (610 mm) o.c. and 1-1/2” (38 mm) from horizontal joints at midpoint between studs. Sound tested with 1-1/2” (38 mm) fiberglass insulation.

3-hour
50-54 STC
WHI-495-0785 & 0789
WEAL 87-118
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Base Layer: 1/2” (12.7 mm) ToughRock Fireguard C gypsum board or 1/2” (12.7 mm) DensArmor Plus Fireguard C applied vertically to each side of 1-5/8” (41 mm) steel studs 24” (610 mm) o.c. with 1” (25 mm) Type S drywall screws 36” (914 mm) o.c. Second Layer: 1/2” (12.7 mm) ToughRock Fireguard C gypsum board or 1/2” (12.7 mm) DensArmor Plus Fireguard C applied vertically to each side with 1-5/8” (41 mm) Type S drywall screws 24” (610 mm) o.c. Face Layer: 1/2” (12.7 mm) ToughRock Fireguard C gypsum board or 1/2” (12.7 mm) DensArmor Plus Fireguard C applied vertically or horizontally to each side with 2-1/4” (57 mm) Type S drywall screws 12” (305 mm) o.c. and 1-1/2” (38 mm) Type G drywall screws midway between studs 1-1/2” (38 mm) above and below horizontal joints. Joints staggered. Sound Tested with 1-1/2” (38 mm) glass fiber insulation, friction fit in stud space.

3-hour
50-54 STC
UL U435, cUL U435, GA WP 29222
WEAL 87-118
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Base Layer: 1/2” (12.7 mm) ToughRock® Fireguard C® gypsum board or 1/2” (12.7 mm) DensArmor Plus® Fireguard C® applied vertically to each side of 1-5/8” (41 mm) metal studs 24” (610 mm) o.c. with joints staggered 24” (610 mm) each side using 1” (25 mm) Type S drywall screws 12” (305 mm) o.c. Second Layer: 1/2” (12.7 mm) ToughRock Fireguard C gypsum board or 1/2” (12.7 mm) DensArmor Plus Fireguard C applied vertically to each side with joints staggered 24” (610 mm) each side attached to studs with 1-5/8” (41 mm) Type S drywall screws 12” (305 mm) o.c. Third Layer: 1/2” (12.7 mm) ToughRock Fireguard C gypsum board or 1/2” (12.7 mm) DensArmor Plus Fireguard C applied vertically to each side with joints offset 8” (203 mm) from studs and staggered 24” (610 mm) each side, attached to studs with 2” (51 mm) Type S drywall screws 24” (610 mm) o.c. and with 1-1/2” (38 mm) Type G drywall screws 12” (305 mm) o.c. between studs 1-1/2” (38 mm) from joints. Face Layer: 1/2” (12.7 mm) ToughRock Fireguard C gypsum board or 1/2” (12.7 mm) DensArmor Plus Fireguard C installed horizontally on each side with joints staggered 24” (610 mm) o.c. Install 2-1/2” (64 mm) Type S drywall screws 12” (305 mm) o.c. to studs and track and 1-1/2” (38 mm) Type G drywall screws 24” (610 mm) o.c. and 1-1/2” (38 mm) from horizontal joints at midpoint between framing. Sound tested with 1-1/2” (38 mm) fiberglass insulation.

4-hour
55-59 STC
WHI-495-0786 & 0787
WEAL 87-119
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Base Layer: 1/2” (12.7 mm) ToughRock Fireguard C gypsum board or 1/2” (12.7 mm) DensArmor Plus Fireguard C applied vertically to each side of 1-5/8” (41 mm) steel studs 24” (610 mm) o.c. with 1” (25 mm) Type S drywall screws 48” (1220 mm) o.c. Second Layer: 1/2” (12.7 mm) ToughRock Fireguard C gypsum board or 1/2” (12.7 mm) DensArmor Plus Fireguard C applied vertically to each side with 1-5/8” (41 mm) Type S drywall screws 36” (914 mm) o.c. Third Layer: 1/2” (12.7 mm) ToughRock Fireguard C gypsum board or 1/2” (12.7 mm) DensArmor Plus Fireguard C applied vertically to each side with 2-1/4” (57 mm) Type S drywall screws 24” (610 mm) o.c. and 1-1/2” (38 mm) Type G drywall screws midway between studs 36” (914 mm) o.c. vertically. Face Layer: 1/2” (12.7 mm) ToughRock Fireguard C gypsum board or 1/2” (12.7 mm) DensArmor Plus Fireguard C applied horizontally to each side with 2-5/8” (67 mm) Type S drywall screws 12” (305 mm) o.c. and 1-1/2” (38 mm) Type G drywall screws midway between studs 1-1/2” (38 mm) above and below horizontal joints. Joints staggered 24” (610 mm) each layer and side. Sound Tested with 1-1/2” (38 mm) glass fiber insulation, friction fit in stud space.

4-hour
55-59 STC
UL U435, cUL U435, GA WP 29612
WEAL 87-119
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5/8” (15.9 mm) ToughRock® Fireguard X™ Products applied perpendicular to 2” x 10” wood joists 16” (406 mm) o.c. with 1-7/8” (48 mm) 6d nails 6” (152 mm) o.c. Wood joists supporting 1” (25.4 mm) nominal wood sub and 1” (25.4 mm) nominal finish floor, or 19/32” (15.1 mm) plywood finished floor with long edges T&G and 15/32” (11.9 mm) interior plywood with exterior glue subfloor perpendicular to joists with joints staggered.

1-hour
UL L501, ULC M5003, cUL L501, GA FC 5420
NGC 4024 & IIC - NGC 5032
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1/2” (12.7 mm) ToughRock® Fireguard C® or 1/2” (12.7 mm) DensArmor Plus® Fireguard C® gypsum board applied perpendicular to 2” x 10” wood joists 16” (406 mm) o.c. with 5d nails 1-5/8” (41 mm) long, 0.099” (2.5 mm) shank, 1/4” (6 mm) heads, 6” (152 mm) o.c. Wood joists supporting 1” (25 mm) nominal T&G wood sub and 1” (25 mm) nominal finish floor, or 19/32” (15.1 mm) plywood finished floor with long edges T&G and 15/32” (11.9 mm) interior plywood with exterior glue subfloor perpendicular to joists with joints staggered. Nails placed 3/4” (19 mm) from board end joints and 1/2” (12.7 mm) from board end joints.

1-hour
UL L503, ULC M502, cUL L503, GA FC 5410
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1/2” (12.7 mm) ToughRock Fireguard C or 1/2” (12.7 mm) DensArmor Plus Fireguard C gypsum board applied perpendicular to resilient channels 24” (610 mm) o.c. with 1” (25 mm) Type S drywall screws 12” (305 mm) o.c. Gypsum board end joints located midway between continuous channels and attached to additional pieces of channels 60” (1524 mm) long with screws 12” (305 mm) o.c. Resilient channels applied perpendicular to 2” x 10” wood joists 16” (406 mm) o.c. with 2” (51 mm) 6d coated nails. Wood joists supporting 1” (25.4 mm) nominal wood subfloor and 1” (25.4 mm) nominal wood finish floor, or 19/32” (15.1 mm) plywood finished floor with long edges T&G and 15/32” (11.9 mm) interior plywood with exterior glue subfloor perpendicular to joist with joints staggered.

1-hour
UL L502, ULC M501, cUL L502, GA FC 5250
RAL TL64-155 & IIC - CK 6512-6
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1/2” (12.7 mm) ToughRock® Fireguard C® or 1/2” (12.7 mm) DensArmor Plus® Fireguard C® gypsum board applied perpendicular to resilient channels 24 o.c. with 1” (25 mm) Type S drywall screws 12” (305 mm) o.c. Gypsum board end joints located midway between continuous channels and attached to additional pieces of channels 60” (1524 mm) long with screws 12” (305 mm) o.c. Resilient channels applied perpendicular to 2” x 10” wood joists 16” (406 mm) o.c. with 6d common nails. Wood joists supporting 19/32” (15.1 mm) plywood and 1” (25 mm) proprietary sanded gypsum underlayment. Sound Tested with 3-1/2” (89 mm) fiberglass insulation in joist spaces and with carpet and pad (2nd layer of drywall needed with insulation).

1-hour
UL L502, cUL L502, GA FC 51052
G&H BW-10 MT
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5/8” (15.9 mm) ToughRock Fireguard C or 5/8” (15.9 mm) DensArmor Plus Fireguard C gypsum board applied perpendicular to resilient channels 24” (610 mm) o.c. Gypsum board secured with 1” (25 mm) long Type S bugle head steel screws. Screws spaced 1/2” (12.7 mm) and 6” (152 mm) from side joints and 12” (305 mm) o.c. in the rest of the field. Screws spaced 3” (76 mm) from the stud joints. End joints secured to both resilient channels. When batt insulation is draped over the resilient channel and 5/8” (15.9mm) ToughRock Fireguard C gypsum panels ceiling membrane, screws spaced 1/2” (12.7 mm) and 4” (102 mm) from side joints and 8” (203 mm) o.c. to the rest of the field.

1-hour
UL M503, cUL M503, GA FC 5515.32

1/2” (12.7 mm) ToughRock Fireguard C or 1/2” (12.7 mm) DensArmor Plus Fireguard C gypsum board applied perpendicular to resilient channels 24” (610 mm) o.c. with 1” (25 mm) Type S drywall screws 12” (305 mm) o.c. Gypsum board end joints located midway between continuous channels and attached to additional pieces of channels 54” (1372 mm) long with screws 12” (305 mm) o.c. Resilient channels applied perpendicular to 2 x 10 wood joists 16” (406 mm) o.c. with 1-1/4” (32 mm) Type W drywall screws. Wood joists supporting 1” (25 mm) nominal T&G wood subfloor and 1” (25.4 mm) nominal wood finish floor, or 19/32” (15.1 mm) plywood finished floor with long edges T&G and 15/32” (11.9 mm) interior plywood with exterior glue subfloor perpendicular to joists with joints staggered.

1-hour
UL L514, ULC M501, cUL L514, GA FC 5240
CK 6512-6 7
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Base Layer: 5/8” (15.9 mm) ToughRock® Fireguard X™ Products or 5/8” (15.9 mm) DensArmor Plus® Fireguard® gypsum board applied at right angles to 2” x 10” wood joists 24” (610 mm) o.c. with 1-1/4” (32 mm) drywall screws 24” (610 mm) o.c. Face Layer: 5/8” (15.9 mm) ToughRock® Fireguard X™ Products or 5/8” (15.9 mm) DensArmor Plus Fireguard gypsum board applied perpendicular to joists through base layer with 1-7/8” (48 mm) Type W or S screws 12” (305 mm) o.c. at joints and intermediate joists. Face layer joints offset 24” (610 mm) from base layer joints, 1-1/2” (38 mm) Type G drywall screws placed 2” (51 mm) back on either side of face layer end joints 12” (305 mm) o.c. Wood joist supporting 1/2” (12.7 mm) plywood with exterior glue applied perpendicular to top of joists with 8d nails. Ceiling provides one-hour fire resistance protection for framing, including trusses.

1-hour
35-39 STC
GA FC 5529
Est.
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5/8” (15.9 mm) ToughRock® Fireguard C® gypsum board or 5/8” DensArmor Plus® Fireguard C® applied perpendicular to resilient channels 24” o.c. (610 mm) with 1” (25.4 mm) Type S drywall screws 12” (305 mm) o.c. Gypsum board end joints located midway between continuous channels and attached to additional pieces of channels 54” (1372 mm) long with screws 12” (305 mm) o.c. Resilient channels applied perpendicular to 2” x 10” wood joists 16” (406 mm) o.c. with 1-1/4” (32 mm) drywall screws. Wood joists supporting 5/8” (15.9 mm) interior plywood with exterior glue subfloor and 1-5/8” (41.3 mm) perlite-sand concrete reinforced with No. 19 SWG galvanized hexagonal wire mesh. 3” (76 mm) glass fiber insulation 0.90 pcf (14.4 kg/m3) in joist space stapled to subfloor.

1-hour
UL L516, cUL L516
KAL L224 27-65
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Ceiling Base Layer: 1/2” (12.7 mm) ToughRock Fireguard C or 1/2” (12.7 mm) DensArmor Plus Fireguard C gypsum board applied perpendicular to wood trusses 24” (610 mm) o.c. with 1-1/4” (32 mm) Type S drywall screws 24” (610 mm) o.c. Face Layer: 1/2” (12.7 mm) ToughRock Fireguard C or 1/2” (12.7 mm) DensArmor Plus Fireguard C gypsum board applied perpendicular to trusses with 1-7/8” (48 mm) Type S drywall screws 12” (305 mm) o.c. and 1-1/2” (38 mm) Type G drywall screws 12” (305 mm) o.c. placed 3” (76 mm) back from either side of end joints. Joints offset 24” (610 mm) from base layer joints. Trusses: Chord and web members fabricated from 2” x 4” lumber with 20-gauge (30 mils) steel connector plates having a minimum tooth length of 5/16” (7.9 mm). Plate design values based upon safety factor of 4. Trusses have a minimum depth of 12” (305 mm). Flooring: 19/32” (15.1 mm) T&G plywood with exterior glue applied at right angles to top of trusses with 6d common nails 6” (152 mm) o.c. Plywood end joints staggered 48” (1219 mm).

1-hour
GA FC 5512

Base Layer: 5/8” (15.9 mm) ToughRock® Fireguard X™ Products or 5/8” (15.9 mm) DensArmor Plus® Fireguard® gypsum board applied perpendicular to 25-gauge (18 mils) drywall rigid furring channels 16” (406 mm) o.c. with 1” (25 mm) Type S screws 12” (305 mm) o.c. Drywall end joints located midway between continuous channels and attached to additional pieces of channel 60” (1524 mm) long with 1” (25 mm) Type S screws 8” (203 mm) o.c. Rigid furring channels 16” (406 mm) o.c. perpendicular to 2” x 10” wood joists 16” (406 mm) o.c. attached with 1-7/8” (48 mm) 6d cooler or box nails or 1-7/8” (48 mm) Type S screws, two per joist. Face Layer: 5/8” (15.9 mm) ToughRock® Fireguard X™ Products or 5/8” (15.9 mm) DensArmor Plus Fireguard gypsum board applied perpendicular to resilient channels through base layer with 1-7/8” (48 mm) Type S screws 12” (305 mm) o.c. Face layer wallboard end joints attached to continuous channels through base layer with 1-7/8” (48 mm) Type S screws 8” (203 mm) o.c. Face layer wallboard edge joints staggered 18” (457 mm) minimum from base layer edge joints; end joints staggered 8” (203 mm) min. from base layer joints. Wood joists supporting 5/8” (15.9 mm) interior plywood with exterior glue subfloor and 1-1/2” (38 mm) lightweight concrete reinforced with galvanized hexagonal wire mesh over film or felt or 1” (25 mm) sanded gypsum floor underlayment. 3-1/2” (89 mm) unfaced fiberglass insulation, nom. 0.6 pcf (9.6 kg/m3), R-11 supported against subfloor by wire rods 12” (305 mm) o.c. Alternately, insulation may be 3-1/2” (89 mm) faced fiberglass insulation stapled in place against subfloor.

1-1/2 hour
UL L532, cUL L532, GA FC 5600

Base Layer: 5/8” (15.9 mm) ToughRock® Fireguard C® gypsum board or 5/8” (15.9 mm) DensArmor Plus® Fireguard C® applied perpendicular to I-shaped wood joists or wood and steel trusses, spaced 19.2” (488 mm) o.c. maximum, with 1-5/8” (41 mm) Type S drywall screws, 8” (203 mm) o.c. Resilient channels attached 16” (406 mm) o.c. through base layer perpendicular to joists or trusses with 1-7/8” (48 mm) Type S drywall screws. Middle Layer: 5/8” (15.9 mm) ToughRock Fireguard C gypsum board or 5/8” (15.9 mm) DensArmor Plus Fireguard C applied perpendicular to resilient channels with 1” (25.4 mm) Type S drywall screws 8” (203.2 mm) o.c. Screws located 1-1/2” (38 mm) to 2” (51 mm) and 5/8” (15.9 mm) to 3/4” (19 mm) from side and end joints respectively. Face Layer: 5/8” (15.9 mm) ToughRock Fireguard C gypsum board or 5/8” (15.9 mm) DensArmor Plus Fireguard C applied perpendicular to channels with 1-5/8” (41 mm) Type S drywall screws, 8” (203 mm) o.c. Joints in the face layer are offset 16” (406 mm) from those in the middle layer. 5/8” (15.9 mm) T&G plywood floor perpendicular to joists with adhesives and 8d cement coated nails 12” (305 mm) o.c.

2-hour
UL L538, cUL L538

Base Layer: 5/8” (15.9 mm) ToughRock Fireguard C gypsum board or 5/8” (15.9 mm) DensArmor Plus Fireguard C (UL L505 only) applied perpendicular to 2” x 10” wood joists 16” (406 mm) o.c. with 2-1/2” (64 mm) 8d cement coated nails 7” (178 mm) o.c. Resilient channel 24” (610 mm) o.c. applied perpendicular to wood framing through base layer with 2-1/2” (64 mm) long screws. Double channel installed at face layer end joints. Face Layer: 5/8” (15.9 mm) ToughRock Fireguard C gypsum board applied or 5/8” (15.9 mm) DensArmor Plus Fireguard C (UL L505 only) applied perpendicular to resilient channels with 1” (25 mm) Type S screws 12” (305 mm) o.c. Wood joists supporting 1” (25.4 mm) nominal T&G wood subfloor and 1” (25 mm) nominal wood finish floor or 15/32” (11.9 mm) plywood subfloor and 19/32” (15.1 mm) plywood finish floor applied perpendicular to joists with joints staggered..

2-hour
UL L505, ULC M503, cUL L505, GA FC 57242

1/2” (12.7 mm) ToughRock Fireguard C or 1/2” (12.7 mm) DensArmor Plus Fireguard C gypsum board applied perpendicular to rigid resilient channels 24” (610 mm) o.c. with 1” (25 mm) Type S screws 12” (305 mm) o.c. in field. Drywall end joints located midway between continuous channels and attached to additional pieces of channel 52” (1321 mm) long with screws 8” (203 mm) o.c. Furring channels wire tied to open web steel joists 24” (610 mm) o.c supporting 3/8” (10 mm) rib steel lath or 9/16” (14 mm) deep 28-gauge (15 mils) corrugated steel and 2” (51 mm) concrete slab measured from top of flute. (Passed 90-minute fire test restrained and unrestrained.)

1-1/2 hour
UL G502, cUL G502, GA FC 1110

Base Layer: 5/8” (15.9 mm) ToughRock® Fireguard X™ Products or 5/8” (15.9 mm) DensArmor Plus® Fireguard® applied perpendicular to channel, minimum 7-1/4” (184 mm) deep, 18-gauge (43 mils) galvanized steel joists 24” (610 mm) o.c. with 1” (25 mm) Type S-12 drywall screws 12” (305 mm) o.c. End joints located midway between joists and staggered between rows. Face Layer: 5/8” (15.9 mm) ToughRock® Fireguard X™ Products or 5/8” (15.9 mm) DensArmor Plus Fireguard applied perpendicular to joists with 1-7/8” (48 mm) Type S-12 drywall screws 12” (305 mm) o.c. placed 2” (51 mm) from edges and 1-1/2” (38 mm) Type G drywall screws 12” (305 mm) o.c. placed 2” (51 mm) back on either side of end joints. End joints located midway between joists and all joints offset 24” (610 mm) from base layer joints. Joists supporting 28-gauge (15 mils) corrugated steel deck and 2-1/2” (64 mm) concrete slab measured from the bottom of the flutes. Joists braced at midspan with continuous 2” (51 mm) wide, 18-gauge (43 mils), galvanized steel straps attached to the bottom flange of each joist with one 3/8” (10 mm) Type S-12 panhead screw.

2-hour
GA FC 2116

5/8” (15.9 mm) ToughRock® Fireguard X™ Products or 5/8” (15.9 mm) DensArmor Plus Fireguard applied perpendicular to resilient channels 24” (610 mm) o.c. with 1” (25 mm) Type S drywall screws 8” (203 mm) o.c. Gypsum board end joints located over continuous channels and attached to additional pieces of channel 54” (1372 mm) long located midway between continuous channels at end joints. Resilient channels 24” (610 mm) o.c. suspended from 2-1/2” (64 mm) precast reinforced concrete joists 35” (89 mm) o.c. with 21-gauge (37 mils) galvanized steel hanger straps fastened to sides of joists. Joist leg depth, 10” (254 mm).

2-hour
GA FC 2120

5/8” (15.9 mm) ToughRock® Fireguard C® gypsum board or 5/8” (15.9 mm) DensArmor Plus® Fireguard C® (UL G505 only) applied perpendicular to rigid furring channels 24” (610 mm) o.c. with 1” (25 mm) Type S drywall screws 12” (305 mm) o.c. Drywall end joints located midway between continuous channels and attached to additional pieces of channel 62” (1575 mm) long with screws 12” (305 mm) o.c. Furring channels attached with 18-gauge (43 mils) wire ties to open web steel joists 24” (610 mm) o.c. supporting 3/8” (10 mm) rib steel lath and 2” (51 mm) concrete slab. (Two hours restrained and unrestrained.)

2-hour
UL G505, ULC I512, cUL G505, GA FC 21302

1/2” (12.7 mm) ToughRock Fireguard C or 1/2” (12.7 mm) DensArmor Plus Fireguard C gypsum board applied perpendicular to resilient channels 24” (610 mm) o.c. with 1” (25 mm) Type S drywall screws 12” (305 mm) o.c. in field. Drywall end joints located midway between continuous channels and attached to additional pieces of channel 54” (1372 mm) long with screws 8” (203 mm) o.c. Resilient channels wire tied 24” (610 mm) o.c. to open web steel joists supporting 3/8” (10 mm) rib steel lath or 9/16” (14 mm) deep 28-gauge (15 mils) corrugated steel and 2-1/2” (64 mm) concrete slab measured from top of flute.

2-hour
UL G504, cUL G504

1/2” (12.7 mm) ToughRock Fireguard C or 1/2” (12.7 mm) DensArmor Plus Fireguard C gypsum board applied perpendicular to rigid furring channels 24” (610 mm) o.c. with 1” (25 mm) Type S drywall screws 12” (305 mm) o.c. Gypsum board end joints located midway between continuous channels and attached to additional pieces of channel 54” (1372 mm) long with screws at 12” (305 mm) o.c. Furring channels 24” (610 mm) o.c. attached with 18-gauge (43 mils) wire tied 48” (1219 mm) o.c. to open web steel joists 24” (610 mm) o.c. supporting 9/16” (14 mm) deep 28-gauge (15 mils) corrugated steel and 2-1/2” (64 mm) concrete slab. Furring channels may be attached to 1-1/2” (38 mm) cold rolled channels 48” (1219 mm) o.c. suspended from joists by 8-gauge wire hangers not more than 48” (1219 mm) o.c. (Two hours restrained and unrestrained.)

2-hour
50-54 STC
ULC 1511, GA FC 2030
NGC 4075
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5/8” (15.9 mm) ToughRock Fireguard C or 5/8” (15.9 mm) DensArmor Plus Fireguard C applied perpendicular to the resilient channels spaced 16” (406 mm) o.c. with 1” (25 mm) Type S screws 12” (305 mm) o.c. Space channels 12” (305 mm) o.c. when insulation is draped over channels. End joints attached with screws 8” (203 mm) o.c. attached to pieces of channel 60” (1524 mm) long located 3” (76 mm) back from either side of the end joint. Resilient channel applied perpendicularly to the bottom of the wood trusses 24” (610 mm) o.c. with 1-1/4” (32 mm) Type S screws. Glass fiber insulation attached to wood panels or draped over channels. When DensArmor Plus Fireguard C is used batt insulation shall be secured to wood structural panels on trusses. Trusses supporting 15/32” (405 mm) wood structural panels applied perpendicular to trusses with adhesive and 6d ring shank nails 12” (305 mm) o.c. Optional ceiling damper (refer to damper manufacturer for damper type).

1-hour
UL P545, cUL P545, GA RC 26062

Exterior Side: 5/8” (15.9 mm) DensGlass® Fireguard® Sheathing or ToughRock® Fireguard X® Sheathing applied vertically or horizontally to 2”x 4” wood studs 16” (406 mm) o.c. with 1-3/4” (45 mm) galvanized roofing nails 7” (178 mm) o.c. Exterior surface covered with weather exposed cladding or finish system. Interior Side: One layer 5/8” (15.9 mm) ToughRock® Fireguard X™ Products or 5/8” (15.9 mm) DensArmor Plus® Fireguard® gypsum board applied vertically or horizontally to studs with 1-7/8” (48 mm) 6d coated 7” (178 mm) o.c. Stagger joints each side. ULC W301 allows vertical application only.

1-hour
30-34 STC
UL U305, ULC W3011 and 3, cUL U305
OR 64-8
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Exterior Side: 5/8” (15.9 mm) DensGlass Fireguard Sheathing applied vertically or horizontally to 2”x 4” wood studs 24” (610 mm) o.c. with 1-7/8” (48 mm) galvanized roofing nails 7” (178 mm) o.c. Joints of gypsum sheathing may be left untreated. Exterior cladding to be attached through sheathing to studs. Interior Side: 5/8” (15.9 mm) ToughRock® Fireguard X™ Products or 5/8” (15.9 mm) DensArmor Plus Fireguard gypsum board applied vertically or horizontally to studs with 1-7/8” (48 mm) 6d coated nails 7” (178 mm) o.c.

1-hour
35-39 STC
UL U309, cUL U309, GA WP 35102, GA WP 8109
NGC 2404
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Interior Base Layer: 5/8” (15.9 mm) ToughRock® Fireguard X™ Products or 5/8” (15.9 mm) DensArmor Plus® Fireguard® gypsum board applied vertically or horizontally to 2”x 4” wood studs 16” (406 mm) o.c. with 1-7/8” (48 mm) 6d coated nails 8” (203 mm) o.c. Face Layer: 5/8” (15.9 mm) ToughRock® Fireguard X™ Products or 5/8” (15.9 mm) DensArmor Plus Fireguard gypsum board applied vertically or horizontally to studs with 2-3/8” (60 mm) 8d coated nails 8” (203 mm) o.c. Exterior Base Layer: 1/2” (12.7 mm) DensGlass® Sheathing or ToughRock® Sheathing applied vertically or horizontally to studs with 1-3/4” (45 mm) galvanized roofing nails 6” (152 mm) o.c. Face Layer: 2”x 4” x 8” (51 x 102 x 203 mm) clay brick with 1” (25.4 mm) air space between brick and exterior sheathing. 20-gauge (30 mils) galvanized wire ties attached to each stud with 2-3/8” (60 mm) 8d coated nails, located at every sixth course of bricks.

2-hour
UL U302, ULC U3021, cUL U302, GA WP 8410

Exterior Side: 5/8” (15.9 mm) DensGlass® Fireguard® Sheathing or ToughRock® Fireguard X® sheathing applied vertically to 3-5/8” (92 mm) 18-gauge (43 mils) steel studs 16” (406 mm) o.c. with #6 x 1-1/4” (32 mm) self-drilling, corrosion-resistant, bugle head, drywall screws 8” (203 mm) o.c. at edges and ends and 8” (203 mm) o.c. at intermediate studs. Proprietary polymer modified exterior insulation and finish system applied over sheathing. 2” (51 mm) maximum foam-on-plastic thickness. Interior Side: 5/8” (15.9 mm) ToughRock® Fireguard X® Products or 5/8” (15.9 mm) DensArmor Plus Fireguard gypsum board applied vertically to studs with #6 x 1-1/4” (32 mm) self-drilling, bugle head drywall screws 8” (203 mm) o.c. at edges and ends and 12” (305 mm) o.c. at intermediate studs.

1-hour
GA WP 81222

Exterior Side: 5/8” (15.9 mm) DensGlass Fireguard Sheathing or ToughRock® Fireguard X® Sheathing applied vertically to 3-5/8” (92 mm) 18-gauge (43 mils) steel studs 24” (610 mm) o.c. with #6 x 1-1/4” (32 mm) self-drilling, corrosion-resistant, bugle head drywall screws 8” (203 mm) o.c. at edges and ends and 8” (203 mm) o.c. at intermediate studs. Polymer-based exterior insulation and finish system applied over sheathing. 4” (102 mm) maximum foam-on-plastic thickness. Interior Side: One layer 5/8” (15.9 mm) ToughRock® Fireguard X® Products or 5/8” (15.9 mm) DensArmor Plus Fireguard gypsum board applied vertically to studs with #6 x 1-1/4” (32 mm) self-drilling, bugle head drywall screws 8” (203 mm) o.c. at edges and ends and 12” (305 mm) o.c. at intermediate studs.

1-hour
GA WP 81232

Fiberglass sound insulation thickness is 1” (25.4 mm), 2-1/2” (64 mm) and 3-1/2” (89 mm) for C-T or C-H studs of 2-1/2” (64 mm), 4” (102 mm) and 6” (152 mm) respectively. Finished one side. Components: 1” (25.4 mm) DensGlass Shaftliner panel, C-T or C-H studs and two layers of 5/8” (15.9 mm) DensArmor Plus Fireguard or 5/8” (15.9 mm) ToughRock® Fireguard X™ Products installed horizontally for base layer and vertically for face layer. Edges and ends offset 24” (610 mm) o.c.

2-hour
50-54 STC
UL V473, ULC W4813, cUL V473, GA WP 70542
RAL TL09-358
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Fiberglass sound insulation thickness is 1” (25 mm), 2-1/2” (64 mm) and 3-1/2” (89 mm) for C-T, C-H or I studs of 2-1/2” (64 mm), 4” (102 mm) and 6” (152 mm) respectively. Finished one side. Components: 1” (25.4 mm) ToughRock® Shaftliner or DensGlass Shaftliner panel, C-T studs and two layers of 1/2” (12.7 mm) DensArmor Plus® Fireguard C™ or 1/2” (12.7 mm) ToughRock® Fireguard C™ gypsum board installed horizontally for base layer and vertically for face layer. Edges and ends offset 24” (610 mm) o.c.

2-hour
50-54 STC
WHI Design GP/WA 120, GA WP 7054.42
RAL TL09-360
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Fiberglass sound insulation thickness is 1” (25 mm), 2-1/2” (64 mm) and 3-1/2” (89 mm) for C-T, C-H or I studs of 2-1/2” (64 mm), 4” (102 mm) and 6” (152 mm) respectively. Finished both sides with 1/2” (12.7 mm) DensArmor Plus Fireguard C or 1/2” (12.7 mm) ToughRock Fireguard C gypsum board installed horizontally or vertically. Edges and ends offset 24” (610 mm) o.c.

2-hour
45-49 STC
GA WP 70732, WHI Design GP/WA 120-02
RAL TL09-359
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Fiberglass sound insulation thickness is 1” (25 mm), 2-1/2” (64 mm) and 3-1/2” (89 mm) for C-T, C-H or I studs of 2-1/2” (64 mm), 4” (102 mm) and 6” (152 mm) respectively. Finished one side. Components: 1” (25.4 mm) ToughRock® Shaftliner or DensGlass® Shaftliner panel, studs and one layer of 5/8” (15.9 mm) ToughRock® Fireguard X™ Products or 5/8” (15.9 mm) DensArmor Plus® Fireguard® gypsum board installed vertically.

1-hour
40-44 STC
UL V493, cUL V493, GA WP 7024.32
RAL TL09-357
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Designed for ceiling or duct shaft and composed of 1” (25.4 mm) ToughRock® Shaftliner or DensGlass Shaftliner panel supported by 2-1/2” (64 mm), 4” (102 mm) or 6” (152 mm) C-T studs and three layers of 1/2” (12.7 mm) ToughRock Fireguard C or 1/2” (12.7 mm) DensArmor Plus Fireguard C gypsum board.

2-hour
WHI-495-PSH-0128

Designed to separate a room from structure or space above and composed of 1” (25.4 mm) ToughRock® Shaftliner or DensGlass Shaftliner panel supported by 2-1/2” (64 mm), 4” (102 mm) or 6” (152 mm) C-T studs and three layers of 1/2” (12.7 mm) ToughRock Fireguard C or 1/2” (12.7 mm) DensArmor Plus Fireguard C gypsum board.

2-hour

Designed to separate a room from structure or space above and composed of 1” (25.4 mm) ToughRock® Shaftliner or DensGlass Shaftliner panel supported by 2-1/2” (64 mm), 4” (102 mm) or 6” (152 mm) C-T studs and three layers of 1/2” (12.7 mm) ToughRock Fireguard C or 1/2” (12.7 mm) DensArmor Plus Fireguard C gypsum board.

2-hour


DensGlass® Shaftliner Panel

Two layers 1” (25.4 mm) DensGlass® Shaftliner inserted in H-Studs 24” (610 mm) o.c. Min. 3/4” (19 mm) air space between liner panels and adjacent wood or metal framing. Sound Tested with 2”x 4” stud wall with 1/2” (12.7 mm) ToughRock® wallboard or DensArmor Plus® interior panels and 3-1/2” (89 mm) fiberglass insulation in stud space. Breakaway clip facings and height of wall differ between UL Design U373 and WHI GP/WA 120-03. Consult each listing for specific information.

2-hour
59 STC
UL U373, ULC W312, WHI GP/WA 120-03, cUL U373
RAL TL10-290
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DensGlass® Shaftliner Panel

Two layers 1” (25.4 mm) DensGlass Shaftliner inserted in H-Studs 24” (610 mm) o.c. Min. 3/4” (19 mm) air space on both sides must be maintained between liner panels and adjacent framing. Sound Tested with 2”x 4” stud wall with 1/2” (12.7 mm) ToughRock gypsum wallboard or DensArmor Plus interior panels each side of assembly and 3-1/2” (89 mm) fiberglass insulation in stud space both sides. Breakaway clip facings and gieght of wall differ between UL Design U373 and WHI GP/WA 120-04. Please consult each listing for specific information.

2-hour
66 STC
RAL TL10-291
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Two layers 1” (25.4 mm) ToughRock® Shaftliner or DensGlass Shaftliner inserted in H-Studs 24” (610 mm) o.c. Metal covered using 6” (152 mm) wide 1/2” (12.7 mm) DensArmor Plus Fireguard C interior panels or 1/2” (12.7 mm) ToughRock Fireguard C gypsum board.

2-hour
38 STC
WHI 495-0743
Est.
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ToughRock® Fireguard C® Products

Base Layer: 1/2” (12.7 mm) ToughRock® Fireguard C® gypsum board tied to W10 x 49 (metric W250 x 73) column 1 hr. with 18-gauge (43 mils) wire 15” (381 mm) o.c. Face Layer: 1/2” (12.7 mm) ToughRock Fireguard C gypsum board applied with laminating compound over entire contact surface. Test conducted with generic Type X in December 1952. Contact GP Technical Service Hotline for a copy of the test report.

1-hour
NBS 303

1/2” (12.7 mm) ToughRock® Fireguard C® or 1/2” (12.7 mm) DensArmor Plus® Fireguard C® gypsum board attached to 1-5/8” (41 mm) steel studs with 1” (25 mm) Type S drywall screws 12” (305 mm) o.c. Studs located at each corner of heavy steel W14 x 233 (metric W360 x 347) column. 1-1/4” (32 mm) steel corner bead crimp-attached at 6” (152 mm) intervals.

2-hour
UL X520, GA CM 2110, cUL X520

Two layers of 5/8” (15.9 mm) ToughRock® Fireguard X™ Products or 5/8” (15.9 mm) DensArmor Plus® Fireguard® gypsum board screw-attached to 1-5/8” (41 mm) steel studs located at each corner of W10 x 49 (metric W250 x 73) column with 1” (25 mm) Type S screws 24” (610 mm) o.c. for base layer and 1-5/8” (41 mm) Type S drywall screws 12” (305 mm) o.c. for face layer. 1-1/4” (32 mm) steel beads at corners attached with 6d coated nails 1-3/4” (45 mm) long, 0.0915” (2 mm) shank, 1/4” (6 mm) heads, 12” (305 mm) o.c.

2-hour
UL X517, cUL X517, GA CM 2120

Two layers of 1/2” (12.7 mm) ToughRock Fireguard C gypsum board or 1/2” (12.7 mm) DensArmor Plus Fireguard C. Base Layer: Screw-attached to 1-5/8” (41 mm) steel studs located at corners of heavy steel W14 x 233 (metric W360 x 347) column with 1” (25 mm) Type S screws 24” (610 mm) o.c. Face Layer: Attached with 1-5/8” (41 mm) Type S drywall screws 12” (305 mm) o.c. into studs. 1” (25 mm) corner bead applied each corner with 1-3/8” (35 mm) 4d coated nails 12” (305 mm) o.c.

3-hour
UL X513, GA CM 3130, cUL X513

Three layers of 5/8” (15.9 mm) ToughRock® Fireguard C® gypsum board or 5/8” (15.9 mm) DensArmor Plus® Fireguard C® (UL X509 only), screw-attached to 1-5/8” (41 mm) steel studs located at each corner of W10 x 49 (metric W250 x 73) column. Base Layer: Attached with 1” (25 mm) Type S drywall screws 24” (610 mm) o.c. Second Layer: Attached with 1-5/8” (41 mm) Type S drywall screws 12” (305 mm) o.c. and 18-gauge (43 mils) wire tied 24” (610 mm) o.c. Face Layer: Attached with 2-1/4” (57 mm) Type S drywall screws 12” (305 mm) o.c. and 1-1/4” (32 mm) corner bead at each corner nailed with 1-7/8” (48 mm) 6d coated nails 12” (305 mm) o.c.

3-hour
UL X509, ULC Z502, cUL X509

Three layers of 5/8” (16.9 mm) ToughRock Fireguard C or 5/8” (16.9 mm) DensArmor Plus Fireguard C gypsum board, screw-attached to 1-5/8” (41.3 mm) steel studs located at each corner of W10 x 49 (metric W250 x 73) column. Base Layer: Attached with 1” (25 mm) Type S drywall screws 24” (610 mm) o.c. Second Layer: Attached with 1-5/8” (41 mm) Type S drywall screws 24” (610 mm) o.c. Face Layer: Attached with 2-1/4” (57 mm) Type S drywall screws 12” (305 mm) o.c. and 1-1/4” (32 mm) corner bead at each corner nailed with 4d coated nails. Joint compound 1/16” (1.6 mm) thick applied over corner bead and entire outer layer of drywall.

3-hour
UL X528, cUL X528, GA CM 3116

Four layers of 5/8” (15.9 mm) ToughRock Fireguard C gypsum board or 5/8” (15.9 mm) DensArmor Plus Fireguard C covering W10 x 49 (metric W250 x 73) steel column. Inner Layer: Attached to steel studs with 1” (25 mm) long self-drilling, self-tapping screws spaced vertically 24” (610 mm) o.c. Second Layer: Attached to steel studs with 1-5/8” (41 mm) long self-drilling, self-tapping screws spaced vertically 24” (610 mm) o.c. Third Layer: Attached to sheet-metal angles with 1” (25 mm) long, self-drilling, self-tapping screws spaced vertically 12” (305 mm) o.c. Outer Layer: Gypsum board attached to the sheet metal angles with 1-5/8” (41 mm) long selfdrilling, self-tapping screws spaced vertically 12” (305 mm) o.c.

4-hour
UL X501, cUL X501

Two layers of 5/8” (15.9 mm) ToughRock® Fireguard X™ Products or 5/8” (15.9 mm) DensArmor Plus® Fireguard® gypsum board around minimum W8 x 24 (metric W200 x 36) beam. Base Layer: Attached with 1-1/4” (32 mm) Type S drywall screws 16” (406 mm) o.c. Face Layer: Attached with 1-3/4” (45 mm) Type S drywall screws 8” (203 mm) o.c to horizontally installed U-shaped steel channels (25-gauge steel (18 mils) 11-1/16” (281 mm) wide with 1” (25 mm) legs) located not less than 1/2” (12.7 mm) from beam flanges. Upper channels secured to steel deck units with 1/2” (12.7 mm) Type S pan-head screws spaced 12” (305 mm) o.c. U-shaped brackets formed of steel channels spaced 24” (610 mm) o.c. suspended from the upper channels with 1/2” (12.7 mm) Type S pan-head screws and supported steel channels installed at lower corners of brackets. Outside corners of gypsum board protected by 0.020” (.5 mm) thick steel corner beads crimped or nailed. (Two-hour restrained or unrestrained beam.)

2-hour
UL N502, ULC O5021 and 3, GA BM 2130

Three layers of 5/8” (15.9 mm) ToughRock® Fireguard X™ Products or 5/8” (15.9 mm) DensArmor Plus Fireguard gypsum board around minimum W8 x 24 (metric W200 x 36) beam. Base Layer: Attached with 1” (25 mm) Type S drywall screws 16” (406 mm) o.c. Middle Layer: Attached with 1-5/8” (41 mm) Type S drywall screws 12” (305 mm) o.c. Face Layer: Attached with 2-1/4” (57 mm) Type S drywall screws 5/8” (15.9 mm) o.c. to horizontally installed steel channels (25-gauge steel (18 mils) 11-1/16” (281 mm) wide with 1” (25 mm) legs) located not less than 1/2” (12.7 mm) from beam flanges. Upper channels secured to steel deck units with 1/2” (12.7 mm) Type S pan-head screws spaced 12” (305 mm) o.c. Brackets formed of steel channels spaced 24” (610 mm) o.c. suspended from the upper channels with 1/2” (12.7 mm) Type S pan-head screws and supported steel channels installed at lower corners of brackets. 20-gauge (33 mils) hexagonal steel mesh fitted between middle and face layers of gypsum board along bottom and extending 1-1/2” (38 mm) onto sides. Outside corners of gypsum board protected by steel corner beads crimped or nailed to the gypsum board. 1-1/2” (38 mm) fluted steel deck units welded to top of beam and supporting minimum 2-1/2” (64 mm) concrete. (Three-hour restrained or two-hour unrestrained beam.)

3-hour
UL N505

One layer of any 5/8” (15.9 mm) DensArmor Plus Fireguard panel applied without horizontal joints and parallel to 1-5/8” (41 mm) steel studs located at each corner of TS8x8x0.250 tube steel column with 1” (25 mm) Type S drywall screws 24” (610 mm) o.c. Steel cornerbead, 1-1/2” (38 mm) flanges, applied with 1” (25 mm) Type S drywall screws 12” (305 mm) o.c. in each flange. Joint compound 1/16” (2.0 mm) thick applied over corner bead.

1-hour
UL X528, GA CM 1851

Exterior: 5/8” (15.9 mm) DensGlass® Fireguard® Sheathing or ToughRock® Fireguard X® Sheathing applied vertically (U337, W301, U305) or horizontally (U305) to 2 x 4 wood studs 16” (406 mm) o.c. with 1-3/4” (45 mm) galvanized roofing nails 7” (178 mm) o.c. for all framing members. Exterior surface covered with weather exposed cladding or finish system. Interior: 5/8” (15.9 mm) DensArmor Plus® Fireguard® interior panels or 5/8” (15.9 mm) ToughRock® Fireguard X™ Products applied vertically (U337, U305) or horizontally (U305) to studs with 1-7/8” (48 mm) 6d coated nails 7” (178 mm) o.c. Stagger joints each side.

1-hour
30-34 STC
OR 64-8
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Exterior: Base layer 5/8” (15.9 mm) DensGlass® Fireguard® Sheathing retardant treated 2 x 6 wood studs 16” (406 mm) o.c. with 6d coated nails, 1-7/8” (48 mm) long, 0.0915” (2 mm) shank, 1/4” (6 mm) heads, 12” (305 mm) o.c. and covered with a single layer fire resistant protective weather retarder paper stapled along each edge at 16” (406 mm) o.c. Galvanized self-furring wire mesh applied over sheathing with 8d galvanized roofing nails, 2-3/8” (60 mm) long, 0.113” (3 mm) shank, 9/32” (7 mm) heads, 6” (152 mm) o.c. Cement stucco applied over wire mesh in two 1/2” (12.7 mm) thick coats with bonding agent applied between coats. Interior: Base layer 5/8” (15.9 mm) DensArmor Plus® Fireguard® or 5/8” (15.9 mm) ToughRock® Fireguard X™ Products applied vertically to studs with 6d coated nails, 1-7/8” (48 mm) long, 0.0915” (2 mm) shank, 1/4” (6 mm) heads, 12” (305 mm) o.c. Face layer 5/8” (15.9 mm) DensArmor Plus Fireguard or 5/8” (15.9 mm) ToughRock® Fireguard X™ Products applied horizontally to studs with 8d coated nails, 2-3/8” (60 mm) long, 0.113” (3 mm) shank, 9/32” (7 mm) heads, 8” (203 mm) o.c. at edges and 12” (305 mm) o.c. at intermediate studs.

2-hour
UC 12-21-67, GA WP 84202

Exterior: 5/8” (15.9 mm) DensGlass® Sheathing applied vertically to min. 3-1/2” (89 mm) corrosion resistant 20-gauge (30 mils) steel studs 24” (610 mm) o.c. with 1” (25 mm) Type S corrosion resistant bugle head screws 8” (203 mm) o.c. Interior: 5/8” (15.9 mm) DensArmor Plus Fireguard or 5/8” (15.9 mm) ToughRock® Fireguard X™ Products applied vertically to framing with 1” (25 mm) Type S bugle head screws 12”(305 mm) o.c. Insulation to completely fill stud cavity.

1-hour
40-44 STC
UL U425, cUL U425
NGC 2385
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Fiberglass sound insulation thickness is 1” (25 mm), 2-1/2” (64 mm) and 3-1/2” (89 mm) for C-T, C-H or I studs of 2-1/2” (64 mm), 4” (102 mm) and 6” (152 mm) respectively. Finished one side. Components: 1” (25.4 mm) ToughRock® Shaftliner or DensGlass® Shaftliner panel, studs and three layers of 5/8” (15.9 mm) ToughRock® Fireguard C™ gypsum board or 5/8” (15.9 mm) DensArmor Plus® Fireguard C™ installed horizontally or vertically per test reference. Edges and ends offset 24” (610 mm) o.c.

3-hour
50-54 STC
WHI GP/WA 180-01, GA WP 74222
RAL TL09-358
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One layer 5/8” (15.9 mm) ToughRock® Fireguard C® gypsum board or 5/8” (15.9 mm) DensArmor Plus® Fireguard C® interior panels applied perpendicular to resilient furring channels with 1” Type S drywall screws 12” o.c. Resilient channels spaced 12” o.c. when insulation is used or 16” o.c. when no insulation is used. Resilient channels applied perpendicular to bottom chord of light-gauge steel trusses 48” o.c. with 1/2” Type S-12 screws. Optional glass fiber or mineral fiber batt or loose fill insulation applied directly over Toughrock Fireguard C gypsum board only. Trusses supporting 23/32” wood structural panel subfloor applied perpendicular to trusses with construction adhesive and mechanical fasteners 12” o.c. and 15/32” wood structural panel underlayment applied perpendicular to trusses with mechanical fasteners 12” o.c. Joints staggered between underlayment and subfloor.

1-hour
UL M507, cUL M507

5/8” (15.9 mm) DensArmor Plus® Fireguard® interior panels applied to one side of a double row of 2-1/2” (64 mm) 25- gauge (18 mils) steel studs 24” (610 mm) o.c. and not less than 1” (25 mm) apart with 1” (25 mm) Type S drywall screws 8” (203 mm) o.c. when applied horizontally to studs and 8” (203 mm) at vertical and bottom edges and 12” (305 mm) o.c. at intermediate studs when applied vertically to studs. 5/8” (15.9 mm) DensArmor Plus Fireguard interior panels applied vertically or horizontally to studs with 1” (25 mm) Type S drywall screws 8” (203 mm) o.c. when applied horizontally to studs and 8” (203 mm) at vertical and bottom edges and 12” (305 mm) o.c. at intermediate studs when applied vertically to studs. Vertical joints centered over studs and staggered one stud cavity on opposite sides of studs. Horizontal joints need not be backed by framing. Horizontal joints on opposite sides need not be staggered. Lateral bracing on both sides of the wall not less than 5 feet on center vertically. Sound tested with a second layer of 5/8” (15.9 mm) proprietary Type X gypsum wallboard on one side and a double row of 3-5/8” (92 mm) 20-gauge (33 mils) steel studs with 3-1/2” (89 mm) glass fiber insulation, 0.5 pcf, on both sides in cavity. (NLB)

1-hour
60-64 STC
UL W407, cUL W407, GA WP 5000.1
RAL TL09-333
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5/8” (15.9 mm) ToughRock® Fireguard X™ (UL U421 only)Products or 5/8” (15.9 mm) DensArmor Plus® Fireguard® interior panels applied vertically or horizontally to one side of 2-1/2” (64 mm), 25-gauge (18 mils) steel studs 24” (610 mm) o.c. with 1” (25.4 mm) Type S drywall screws 8” (203 mm) o.c. at vertical joints and 12” (305 mm) o.c. at intermediate studs when applied vertically to framing, or 8” (203 mm) o.c. when applied horizontally to framing. Opposite side: Base layer – 5/8” (15.9 mm) ToughRock® Fireguard X™ (UL U421 only)Products or 5/8” (15.9 mm) DensArmor Plus Fireguard interior panels applied vertically or horizontally to studs with 1” (25.4 mm) Type S drywall screws 8” (203 mm) o.c. at vertical joints and 12” (305 mm) o.c. at intermediate studs when applied vertically to framing, or 8” (203 mm) o.c. when applied horizontally to framing. Second layer – 5/8” (15.9 mm) ToughRock® Fireguard X™ (UL U421 only)Products or 5/8” (15.9 mm) DensArmor Plus Fireguard interior panels applied vertically or horizontally to studs with 1-5/8” (41 mm) Type S drywall screws 12” (305 mm) o.c. Face layer – 5/8” (15.9 mm) ToughRock® Fireguard X™ (UL U421 only)Products or 5/8” (15.9 mm) DensArmor Plus Fireguard interior panels applied vertically or horizontally to studs with 2-3/8” (60 mm) Type S drywall screws 8” (203 mm) o.c. at vertical joints and 12” (305 mm) o.c. at intermediate studs when applied vertically to framing, or 8” (203 mm) o.c. applied horizontally to framing. Horizontal joints staggered not less than 6” (152 mm) between layers. When gypsum panels are other than 48” (1219 mm) wide, panels are applied horizontally to the framing. Vertical joints staggered 24” (610 mm) each layer and side. Sound tested with 2-1/2” (64 mm) fiberglass insulation.

2-hour
55-59 STC
UL U421, ULC W4773, cUL U421, GA WP 15552
RAL TL10-196
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Base Layer: 5/8” (15.9 mm) ToughRock® Fireguard X® or DensArmor Plus® Fireguard® interior panels applied vertically or horizontally to one side of a double row of 2-1/2” (64 mm), 25-gauge steel studs 24” (610 mm) o.c. and not less than 1” (25.4 mm) apart with 1” (25.4 mm) Type S drywall screws 16” (406 mm) o.c. Face Layer: 5/8” (15.9 mm) ToughRock Fireguard X or DensArmor Plus Fireguard interior panels applied vertically or horizontally to same side of studs with 1-5/8” (41 mm) Type S drywall screws 12” (305 mm) o.c. Face layer vertical joints offset one stud cavity from base layer vertical joints. Face layer horizontal joints offset not less than 6” (152 mm) from base layer horizontal joints. Vertical joints centered over studs and staggered one stud cavity on opposite sides of studs. Horizontal joints need not be backed by framing. Horizontal joints on opposite sides need not be staggered. Lateral bracing on both sides of the wall not less than 5 feet on center vertically. Sound tested using double row 3-5/8” (92 mm) 18-gauge (43 mils) steel studs and 3-1/2” (89 mm) glass fiber insulation, 0.5 pcf, on both sides in cavity. (NLB)

2-hour
65-69 STC
UL W407, cUL W407, GA WP 5240
RAL TL09-332
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One layer 5/8” (15.9 mm) ToughRock® Fireguard C® gypsum board or 5/8” (15.9 mm) DensArmor Plus® Fireguard C® interior panels applied to resilient or rigid furring channels with 1” (25.4 mm) Type S drywall screws 12” (305 mm) o.c. Channels spaced 12” (305 mm) o.c. when insulation is used or 16” (406 mm) o.c. when no insulation is used. Resilient channels applied perpendicular to bottom chord of pitched or parallel chord steel trusses 48” o.c. with 1/2” (12.7 mm) Type S-12 screws. Optional glass fiber or mineral fiber batt or loose fill insulation applied directly over ToughRock Fireguard C gypsum board only. Trusses supporting metal roof deck panels covered by 1/2” (12.7 mm) regular gypsum sheathing either loose laid, or adhesively or mechanically attached to roof deck. Any thickness polyisocyanurate foamed plastic; polystyrene foamed plastic; or mineral fiber or glass fiber insulation boards laid over gypsum sheathing and covered by a Class A, B or C roof covering.

1-hour
UL P550, cUL P550, GA RC 25022

Fiberglass sound insulation thickness is 1” (25 mm), 2-1/2” (64 mm) and 3-1/2” (89 mm) for C-T or C-H studs of 2-1/2” (64 mm), 4” (102 mm) and 6” (152 mm) respectively. Finished one side. Components: 1” (25.4 mm) DensGlass® Shaftliner panel, studs and one layer of 5/8” (15.9 mm) ToughRock® Fireguard X™ Products or 5/8” (15.9 mm) DensArmor Plus® Fireguard® gypsum board installed vertically.

1-hour
40-44 STC
UL V473, cUL V473, GA WP 68512
RAL TL09-357
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Fiberglass sound insulation thickness is 1” (25.4 mm), 2-1/2” (64 mm), and 3-1/2” (89 mm) for C-T or C-H studs of 2-1/2” (64 mm), 4” (102 mm), and 6” (152 mm) respectively. Finished both sides with 5/8” (15.9 mm) ToughRock Fireguard or 5/8” (15.9 mm) DensArmor Plus Fireguard board installed horizontally or vertically. Edges and ends offset 24” (610 mm) o.c.

2-hour
45-49 STC
UL V473, ULC W4813, cUL V473, GA WP 70592
RAL TL09-359
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Base Layer: 5/8” (15.9 mm) ToughRock® Fireguard X™ Products or 5/8” (15.9 mm) DensArmor Plus® Fireguard® applied vertically or horizontally to each side of 2” x 3” or 2” x 4” wood studs, turned flatwise 24” (610 mm) o.c. with 1-7/8” (48 mm) 6d cement coated nails 7”(178 mm) o.c. Face Layer: 5/8” (15.9 mm) ToughRock® Fireguard X™ Products or 5/8” (15.9 mm) DensArmor Plus Fireguard applied vertically or horizontally to each side with 8d cement coated nails, 2-3/8” (60 mm) long 8” (203 mm) o.c.

1-hour
UL U338, cUL U338, GA WP 3641


ToughRock® Fireguard 45™ Products

1/2" (12.7 mm) ToughRock® Fireguard 45™ gypsum board applied vertically or horizontally to each side of 2” x 4” wood studs 24” (610 mm) o.c. with 1-3/8” (35 mm) phosphate coated nails spaced 12” (305 mm) o.c. Horizontal edge joints and horizontal butt joints on opposite side of studs need not be staggered. Sound Tested with 3-1/2” (89 mm) fiberglass insulation.

30-minute
40-44 STC
UL V315, cUL V315
RAL TL14-300
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ToughRock® Fireguard 45™ Products

1/2” (12.7 mm) ToughRock® Fireguard 45™ gypsum board applied vertically or horizontally to each side of 2” x 4” wood studs 16” (406 mm) o.c. with 1-3/8” (35 mm) phosphate coated nails spaced 8” (203 mm) o.c. Horizontal edge joints and horizontal butt joints on opposite side of studs need not be staggered. Sound Tested with 3-1/2” (89 mm) fiberglass insulation.

45-minute
30-34 STC
UL V316, cUL V316
RAL TL14-298
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