Page 378 - 2018_IRC

WALL CONSTRUCTION

TABLE R610.5(2)
MINIMUM THICKNESS FOR SIP WALL SUPPORTING SIP OR LIGHT-FRAME ONE STORY AND ROOF ONLY (inches) a
BUILDING WIDTH (ft)
ULTIMATE DESIGN
WIND SPEED 24 28 32 36 40
V ult (mph) SNOW
LOAD
(psf) Wall Height (feet) Wall Height (feet) Wall Height (feet) Wall Height (feet) Wall Height (feet)
Exp. B Exp. C
8 9 1 0 8 9 1 0 8 9 1 0 8 9 1 0 8 9 1 0
20 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 6.5 4.5 4.5 DR 4.5 4.5 DR
30 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 6.5 4.5 4.5 DR 4.5 6.5 DR
110 —
50 4.5 4.5 4.5 4.5 4.5 6.5 4.5 4.5 DR 4.5 DR DR DR DR DR
70 4.5 4.5 6.5 4.5 4.5 DR 4.5 DR DR DR DR DR DR DR DR
20 4.5 4.5 4.5 4.5 4.5 6.5 4.5 4.5 DR 4.5 4.5 DR 4.5 DR DR
30 4.5 4.5 4.5 4.5 4.5 6.5 4.5 4.5 DR 4.5 6.5 DR 4.5 DR DR
115 —
50 4.5 4.5 6.5 4.5 4.5 DR 4.5 DR DR 4.5 DR DR DR DR DR
7 0 4 . 5 4 . 5 D R 4 . 5 D R D R D R D R D R D R D R D R D R D R D R
20 4.5 4.5 6.5 4.5 4.5 DR 4.5 4.5 DR 4.5 DR DR 4.5 DR DR
30 4.5 4.5 DR 4.5 4.5 DR 4.5 6.5 DR 4.5 DR DR DR DR DR
120 —
50 4.5 4.5 DR 4.5 DR DR 4.5 DR DR DR DR DR DR DR DR
70 4.5 DR DR 4.5 DR DR DR DR DR DR DR DR DR DR DR
20 4.5 6.5 DR 4.5 DR DR 4.5 DR DR DR DR DR DR DR DR
30 4.5 DR DR 4.5 DR DR DR DR DR DR DR DR DR DR DR
130 110
5 0 4 . 5 D R D R D R D R D R D R D R D R D R D R D R D R D R D R
70 DR DR DR DR DR DR DR DR DR DR DR DR DR DR DR
For SI: 1 Inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot = 0.0479 kPa, 1 mile per hour = 0.447 m/s.
DR = Design Required.
a. Design assumptions:
Maximum deflection criteria: L/240.
Maximum roof dead load: 10 psf.
Maximum roof live load: 70 psf.
Maximum ceiling dead load: 5 psf.
Maximum ceiling live load: 20 psf.
Maximum second-floor dead load: 10 psf.
Maximum second-floor live load: 30 psf.
Maximum second-floor dead load from walls: 10 psf.
Maximum first-floor dead load: 10 psf.
Maximum first-floor live load: 40 psf.
Wind loads based on Table R301.2 (2).
Strength axis of facing material applied vertically.

2018 INTERNATIONAL RESIDENTIAL CODE ® 353
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