Page 270 - 2018_IRC

WALL CONSTRUCTION

TABLE R603.3.2.1(2)
ALL BUILDING WIDTHS GABLE ENDWALLS OVER 10 FEET IN HEIGHT a, b, c, d
ULTIMATE WIND MINIMUM STUD THICKNESS (mils)
SPEED AND
EXPOSURE CATEGORY MEMBER SIZE STUD SPACING Stud Height, h (feet)
(mph) (inches)
Exp. B Exp. C 10 < h ≤ 12 12 < h ≤ 14 14 < h ≤ 16 16 < h ≤ 18 18 < h ≤ 20 20 < h ≤ 22
16 33 43 68 97 — —
350S162
2 4 4 3 6 8 — — — —
115 —
16 33 33 33 43 43 54
550S162
24 33 43 43 54 68 97
16 43 54 97 — — —
350S162
2 4 5 4 9 7 — — — —
120 —
16 33 33 43 43 54 68
550S162
24 33 43 54 54 68 97
16 43 54 97 — — —
350S162
2 4 5 4 9 7 — — — —
130 115
16 33 33 43 54 54 97
550S162
24 43 43 54 68 97 97
1 6 4 3 6 8 — — — —
350S162
2 4 6 8 — — — — —
< 140 120
16 33 43 43 54 68 97
550S162
24 43 54 54 68 97 —
1 6 5 4 9 7 — — — —
350S162
2 4 9 7 — — — — —
— 1 3 0
16 33 43 54 68 97 —
550S162
24 43 54 54 97 — —
1 6 5 4 9 7 — — — —
350S162
2 4 9 7 — — — — —
— < 1 4 0
16 43 43 54 97 97 —
550S162
24 54 54 68 — — —
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 mil = 0.0254 mm, 1 mile per hour = 0.447 m/s, 1 pound per square foot = 0.0479 kPa,
1 ksi = 1,000 psi = 6.895 MPa.
a. Deflection criterion L/240.
b. Design load assumptions:
Ground snow load is 70 psf.
Roof/ceiling dead load is 12 psf.
Floor dead load is 10 psf.
Floor live load is 40 psf.
Attic dead load is 10 psf.
c. Building width is in the direction of horizontal framing members supported by the wall studs.
d. Minimum Grade 33 ksi steel shall be used for 33 mil and 43 mil thicknesses. Minimum Grade 50 ksi steel shall be used for 54 and 68 mil thicknesses.

2018 INTERNATIONAL RESIDENTIAL CODE ® 245
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