Page 193 - 2018_Complete_14_Collection (1)_Neat

FIRE AND SMOKE PROTECTION FEATURES

TABLE 721.1(2)—continued
RATED FIRE-RESISTANCE PERIODS FOR VARIOUS WALLS AND PARTITIONS a, o, p
MINIMUM FINISHED
THICKNESS FACE-TO-
ITEM b
MATERIAL CONSTRUCTION FACE (inches)
NUMBER
4 3 2 1
hours hours hours hour
3
2" × 4" wood studs 16" on center with two layers of / " regular gypsum
8
e
n
n
wallboard each side, 4d cooler or wallboard nails at 8" on center first layer, 5d
n
n
14-1.1 h, m cooler or wallboard nails at 8" on center second layer with laminating compound — — — 5
between layers, joints staggered. First layer applied full length vertically, second
layer applied horizontally or vertically.
1
2" × 4" wood studs 16" on center with two layers / " regular gypsum wallboard e
2
k
l, m applied vertically or horizontally each side , joints staggered. Nail base layer with 1
14-1.2 n n n n — — — 5 /
5d cooler or wallboard nails at 8" on center face layer with 8d cooler or wallboard 2
nails at 8" on center.
e
5
2" × 4" wood studs 24" on center with / " Type X gypsum wallboard applied
8
n
n
14-1.3 l, m vertically or horizontally nailed with 6d cooler or wallboard nails at 7" on center — — — 4 3 / 4
14. Wood with end joints on nailing members. Stagger joints each side.
studs-interior par-
tition with gyp- 2" × 4" fire-retardant-treated wood studs spaced 24" on center with one layer of
5
e
sum wallboard 14-1.4 l / " Type X gypsum wallboard applied with face paper grain (long dimension) — — — 4 3 d
/
8
n
n
4
each side parallel to studs. Wallboard attached with 6d cooler or wallboard nails at 7" on
center.
5
2" × 4" wood studs 16" on center with two layers / " Type X gypsum wallboard e
8
n
each side. Base layers applied vertically and nailed with 6d cooler or wallboard n
l, m nails at 9" on center. Face layer applied vertically or horizontally and nailed with 8d
14-1.5 n n — — 6 —
cooler or wallboard nails at 7" on center. For nail-adhesive application, base layers
are nailed 6" on center. Face layers applied with coating of approved wallboard
adhesive and nailed 12" on center.
2" × 3" fire-retardant-treated wood studs spaced 24" on center with one layer of
5 / " Type X gypsum wallboard applied with face paper grain (long dimension) at
e
14-1.6 l 8 — — — 3 5 d
/
right angles to studs. Wallboard attached with 6d cement-coated box nails spaced 7" 8
on center.
1
3
Exterior surface with / " drop siding over / " gypsum sheathing on 2" × 4" wood
2
4
studs at 16" on center, interior surface treatment as required for 1-hour-rated exterior
3
15-1.1 l, m or interior 2" × 4" wood stud partitions. Gypsum sheathing nailed with 1 / " by No. — — — Var-
ies
4
7
11 gage by / " head galvanized nails at 8" on center. Siding nailed with 7d
16
galvanized smooth box nails.
3
2" × 4" wood studs 16" on center with metal lath and / " cement plaster on each
4
l, m side. Lath attached with 6d common nails 7" on center driven to 1" minimum 3
15-1.2 penetration and bent over. Plaster mix 1:4 for scratch coat and 1:5 for brown coat, — — — 5 / 8
15. Exterior or by volume, cement to sand.
interior walls 7
(continued) 2" × 4" wood studs 16" on center with / " cement plaster (measured from the face of
8
15-1.3 l, m studs) on the exterior surface with interior surface treatment as required for interior — — — Var-
wood stud partitions in this table. Plaster mix 1:4 for scratch coat and 1:5 for brown ies
coat, by volume, cement to sand.
5
7
3 / " No. 16 gage noncombustible studs 16" on center with / " cement plaster
8
8
(measured from the face of the studs) on the exterior surface with interior surface
15-1.4 treatment as required for interior, nonbearing, noncombustible stud partitions in this — — — Var- d
ies
table. Plaster mix 1:4 for scratch coat and 1:5 for brown coat, by volume, cement to
sand.
(continued)
166 2018 INTERNATIONAL BUILDING CODE ®
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