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Load Chart 12: Wind Speed vs.
Pressure (Chart 2 of 2)
Wall Loads (psf) - End Zone (Zone 5) for 100sf to 500sf effective wind area
Mean Roof
Height (ft)
130 MPH 140 MPH 150 MPH 170 MPH
Exp B Exp C Exp D Exp B Exp C Exp D Exp B Exp C Exp D Exp B Exp C Exp D
15
-31.6 -38.2 -46.5 -36.7 -44.4 -53.9 -42.1 -50.9 -61.9 -54.1 -65.5 -79.5
20
-31.6 -40.8 -49.0 -36.7 -47.3 -56.9 -42.1 -54.3 -65.3 -54.1 -69.8 -83.9
25
-31.6 -42.7 -50.9 -36.7 -49.5 -59.1 -42.1 -56.8 -67.8 -54.1 -73.0 -87.1
30
-31.6 -44.2 -52.5 -36.7 -51.4 -60.9 -42.1 -58.9 -69.9 -54.1 -75.7 -89.8
35
-33.2 -45.8 -53.7 -38.5 -53.2 -62.4 -44.2 -61.1 -71.6 -56.8 -78.4 -92.0
40
-34.4 -47.1 -55.0 -40.0 -54.7 -63.9 -45.9 -62.7 -73.3 -59.0 -80.6 -94.1
45
-35.4 -48.3 -56.2 -41.1 -56.2 -65.3 -47.2 -64.4 -74.9 -60.6 -82.8 -96.3
50
-36.7 -49.3 -57.2 -42.6 -57.3 -66.4 -48.8 -65.7 -76.2 -62.8 -84.4 -97.9
55
-37.6 -50.2 -58.1 -43.7 -58.4 -67.5 -50.1 -66.9 -77.5 -64.4 -86.0 -99.5
60
-38.6 -51.2 -59.1 -44.8 -59.5 -68.6 -51.4 -68.2 -78.7 -66.0 -87.6 -101.2
Net Design wind
pressure
-31.6 -36.7 -42.1 -54.1
More information on this chart can be found in Technical Bulletin #15 (www.pbssips.com).