Page 318 - 2018_IRC

WALL CONSTRUCTION

TABLE R608.7(1B)
UNREDUCED LENGTH, UR, OF SOLID WALL REQUIRED IN EACH EXTERIOR ENDWALL
FOR WIND PERPENDICULAR TO RIDGE FIRST STORY OF TWO STORY a, c, d, e, f, g
UNREDUCED LENGTH, UR, OF SOLID WALL REQUIRED IN ENDWALLS FOR WIND PERPENDICULAR TO RIDGE
(feet)
SIDEWALL ENDWALL ROOF Basic Wind Speed (mph) Exposure
LENGTH LENGTH SLOPE 115B 120B 130B 140B 150B 160B
(feet) (feet)
— — 110C 119C 127C 136C Minimum b
— — — 1 1 0 D 1 1 7 D 1 2 5 D
< 1:12 2.98 3.25 3.81 4.42 5.07 5.77 2.54
5:12 4.13 4.50 5.28 6.12 7.03 8.00 2.76
15
7:12 4.31 4.70 5.51 6.39 7.34 8.35 2.87
12:12 5.51 6.00 7.04 8.16 9.37 10.66 3.15
< 1:12 2.98 3.25 3.81 4.42 5.07 5.77 2.59
5:12 4.13 4.50 5.28 6.12 7.03 8.00 3.05
30
7:12 5.09 5.55 6.51 7.55 8.67 9.86 3.26
12:12 7.48 8.15 9.56 11.09 12.73 14.49 3.83
15
< 1:12 2.98 3.25 3.81 4.42 5.07 5.77 2.65
5:12 4.13 4.50 5.28 6.12 7.03 8.00 3.34
45
7:12 5.88 6.40 7.51 8.71 10.00 11.37 3.65
12:12 9.46 10.30 12.09 14.02 16.09 18.31 4.51
< 1:12 2.98 3.25 3.81 4.42 5.07 5.77 2.71
5:12 4.13 4.50 5.28 6.12 7.03 8.00 3.63
60
7:12 6.66 7.25 8.51 9.87 11.32 12.89 4.04
12:12 11.43 12.45 14.61 16.94 19.45 22.13 5.19
< 1:12 5.32 5.79 6.80 7.89 9.05 10.30 5.06
5:12 7.39 8.04 9.44 10.95 12.57 14.30 5.47
15
7:12 7.94 8.65 10.15 11.77 13.51 15.37 5.65
12:12 9.94 10.82 12.70 14.73 16.91 19.24 6.17
< 1:12 5.32 5.79 6.80 7.89 9.05 10.30 5.16
5:12 7.39 8.04 9.44 10.95 12.57 14.30 5.98
30
7:12 9.25 10.07 11.82 13.71 15.74 17.91 6.35
12:12 13.25 14.43 16.93 19.64 22.54 25.65 7.38
30
< 1:12 5.32 5.79 6.80 7.89 9.05 10.30 5.27
5:12 7.39 8.04 9.44 10.95 12.57 14.30 6.50
45
7:12 10.56 11.50 13.50 15.65 17.97 20.45 7.06
12:12 16.56 18.03 21.16 24.55 28.18 32.06 8.60
< 1:12 5.32 5.79 6.80 7.89 9.05 10.30 5.38
5:12 7.39 8.04 9.44 10.95 12.57 14.30 7.01
60
7:12 11.87 12.93 15.17 17.60 20.20 22.98 7.76
12:12 19.87 21.64 25.40 29.45 33.81 38.47 9.81
(continued)

2018 INTERNATIONAL RESIDENTIAL CODE ® 293
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