Page 76 - 2018_IRC

BUILDING PLANNING

a a

a 3 2 2 3

θ
5 h
2 1 1 2
5 θ a h
4 4
θ ≤ 7°
a
5 5
a 3 2 2 3
a
a
GABLE ROOFS
WALLS θ ≤ 7°

a a a a a a
a
a 3 2 33 2 3 a 3 2 3
1
2 2
2 2
θ θ
2 1 2 2 1 2 2 1 2 2 1 2
h a a h
7° < θ ≤ 45° 2 2 2 2 7° < θ ≤ 27°
1
a 3 2 3 3 2 3 a 3 2 3
a
GABLE ROOFS
7° < θ ≤ 45° HIP ROOFS
7° < θ ≤ 27°

For SI: 1 foot = 304.8 mm, 1 degree = 0.0175 rad.
Note: a = 4 feet in all cases.
FIGURE R301.2(8)
COMPONENT AND CLADDING PRESSURE ZONES

TABLE R301.2.1.3
WIND SPEED CONVERSIONS a
V ult 110 115 120 130 140 150 160 170 180 190 200
V asd 85 89 93 101 108 116 124 132 139 147 155
For SI: 1 mile per hour = 0.447 m/s.
a. Linear interpolation is permitted.

2018 INTERNATIONAL RESIDENTIAL CODE ® 51
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