DP Rating WIND CONVERSION CALCULATION
(CONTINUATION FROM PAGE 1)
Step 3 • Choose your roof height and exposure.
Roof height is dimension H in the photo below and is taken from a point ∏ between the eve and the peak of the roof. Exposure typically, exposure B is 120 MPH and less and exposure C is 130 and higher.
20 MEAN ROOF HEIGHT 25 30 15
EXPOSURE
B
C
1.00 1.00 1.00 1.00 1.05 1.09 1.12 1.16 1.19 1.22
1.21 1.29 1.35 1.40 1.45 1.49 1.53 1.56 1.59 1.62
55 60 35 40 45 50
h
5
a
5
4
4
a
WALLS
5 5
a
a
a
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