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FIRE AND SMOKE PROTECTION FEATURES
TABLE 722.5.1(9) TABLE 722.5.1(10)
MINIMUM COVER (inch) FOR STEEL COLUMNS IN NORMAL- MINIMUM COVER (inch) FOR STEEL COLUMNS IN
a
a
WEIGHT PRECAST COVERS [FIGURE 722.5.1(6)(a)] STRUCTURAL LIGHTWEIGHT PRECAST COVERS
FIRE-RESISTANCE RATING (hours) [FIGURE 722.5.1(6)(a)]
STRUCTURAL SHAPE FIRE-RESISTANCE RATING (hours)
1 1 1 / 2 2 3 4 STRUCTURAL SHAPE
1 1 1 / 2 2 3 4
W14 × 233 3
1
1
1 / W14 × 233 2 /
1
× 211 2 2 / 2 2 2
1
1 / × 176
× 176 2
2 3 / × 145 1 /
1
1
× 145 2 2
1
1 / × 132 3
1
1
× 109 2 3 1 / 2 1 / 2
1
× 109 2 /
× 99 2
2 2 1 / 4 × 99
× 61 2
3 / × 68 2
1
1
1
× 43 2 4 / 2 × 43 3 3 / 2
1
W12 × 190 1 / 2 2 / 3 / W12 × 190
1
1
1
× 152 2 2 2 / 2
1
1 / × 152 2
× 120 2 2
3 × 136
1
1
× 96 1 / 2 4 × 106 1 / 2 3
1
1
× 87 1 / 2 1 / 2
× 96
1
1
× 58 2 2 1 / 2 3 / 2 4 / × 87 2 / 2
1
1
× 40 2 3 / 2
× 65
1
W10 × 112 3 / 2 2
1 / 2 × 40 3
1
× 88 2 3
W10 × 112 2
1
× 77 1 / 2 4 × 100 1 / 3
1
× 54 2 2 1 / 2 3 / × 88 2
1
1
1
1
× 33 2 4 / 2 × 77 1 / 1 / 2 2 / 2
1
1
W8 × 67 1 / 2 2 3 × 60 2
× 58 4 2 3 1 / 2
× 39
× 48 2 2 1 / 2 3
1 / 3 / × 33 2
1
1
× 28 2 2
W8 × 67 1 / 2 / 3
1
1
1
× 21 4 / 2 2 2
2 / 3 × 48 1 /
1
1
× 18 2 4 2
1
1
× 35 1 / 2 3 /
W6 × 25 2 2 1 / 2 3 / × 28 2 3 2
1
1
× 20 1 / 2 2 4 / × 18 2 2 / 4
1
1
× 16 2 2
1
1
2 / 3 W6 × 25 2 3 /
× 12 2 4 3 2
2 × 15 1 / 2
1
1
× 9 5 2 2 / 2 4
1
× 9 3 / 2
For SI: 1 inch = 25.4 mm.
a. The tabulated thicknesses are based on the assumed properties of normal- For SI: 1 inch = 25.4 mm.
weight concrete given in Table 722.5.1(2). a. The tabulated thicknesses are based on the assumed properties of
structural lightweight concrete given in Table 722.5.1(2).
2018 INTERNATIONAL BUILDING CODE ® 207
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