Page 320 - 2018_IRC

WALL CONSTRUCTION

TABLE R608.7(1C)
UNREDUCED LENGTH, UR, OF SOLID WALL REQUIRED IN EACH
EXTERIOR SIDEWALL FOR WIND PARALLEL TO RIDGE a, c, d, e, f, g
UNREDUCED LENGTH, UR, OF SOLID WALL REQUIRED IN SIDEWALLS FOR WIND PARALLEL TO RIDGE (feet)
Basic Wind Speed (mph) Exposure
SIDEWALL ENDWALL ROOF 115B 120B 130B 140B 150B 160B
LENGTH LENGTH SLOPE
(feet) (feet) — — 110C 119C 127C 136C Minimum b
— — — 110D 117D 125D
One story or top story of two story
< 1:12 1.08 1.18 1.39 161 1.84 2.10 0.90
5:12 1.29 1.40 1.65 1.91 2.19 2.49 1.08
15
7:12 1.38 1.50 1.76 2.04 2.35 2.67 1.17
12:12 1.63 1.78 2.09 2.42 2.78 3.16 1.39
< 1:12 2.02 2.20 2.59 3.00 3.44 3.92 1.90
5:12 2.73 2.97 3.48 4.04 4.64 5.28 2.62
30
7:12 3.05 3.32 3.89 4.51 5.18 5.89 2.95
12:12 3.93 4.27 5.02 5.82 6.68 7.60 3.86
< 30
< 1:12 3.03 3.30 3.87 4.49 5.15 5.86 2.99
5:12 4.55 4.96 5.82 6.75 7.74 8.81 4.62
45
7:12 5.24 5.71 6.70 7.77 8.92 10.15 5.36
12:12 7.16 7.79 9.14 10.61 12.17 13.85 7.39
< 1:12 4.11 4.47 5.25 6.09 6.99 7.96 4.18
5:12 6.78 7.39 8.67 10.05 11.54 13.13 7.07
60
7:12 8.00 8.71 10.22 11.85 13.61 15.48 8.38
12:12 11.35 12.36 14.51 16.82 19.31 21.97 12.00
< 1:12 3.17 3.46 4.06 4.70 5.40 6.14 2.99
5:12 4.75 5.18 6.07 7.04 8.09 9.20 4.62
45
7:12 5.47 5.96 6.99 8.11 9.31 10.59 5.36
12:12 7.45 8.11 9.52 11.04 12.68 14.43 7.39
60
< 1:12 4.41 4.81 5.64 6.54 7.51 8.54 4.18
5:12 7.22 7.86 9.23 10.70 12.29 13.98 7.07
60
7:12 8.50 9.25 10.86 12.59 14.46 16.45 8.38
12:12 12.02 13.09 15.36 17.81 20.45 23.27 12.00
(continued)

2018 INTERNATIONAL RESIDENTIAL CODE ® 295
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