Installation Manual
DynoRaxx Evolution PR Guide to Code Compliant Installation
7 | P a g e 8 6 6 . 6 2 0 . 2 4 1 0 | d y n o r a x x . c o m
Exposure D:
A building at the shoreline (excluding shorelines in hurricane-prone regions) with wind flowing over
open water for a distance of at least 1 mile
Shorelines in exposure D include inland waterways, the Great Lakes, and coastal areas of California,
Oregon, Washington, and Alaska
For further details on exposure categories, please consult 6.5.6.3 in the ASCE 7-05. With these exposure
categories, look up the values of , as specified from the following table:
Taken from ASCE 7-05, Figure 6.3, p. 44
Task 4: Determine
, the topographic factor. For the purpose of this installation manual, this value will be
taken to be 1. This signifies that the installation site is surrounded by ground level with no abrupt changes in
general topography. If this is not the case, consult section 6.5.7 in the ASCE 7-05.
Task 5: Determine I, the importance factor. The importance factor accounts for the degree of hazard to
human life and damage to property. Using the structure classification description provided on the next page,
determine the value of I from the table below:
Category
Importance Factor
I
.87
II
1.00
III
1.15
IV
1.15
Adapted from ASCE 7-05 Table 6-1, p.77
Adjustment Factor for Building Height and Exposure,
Mean roof
height (ft)
Exposure Category
B
C
D
15
1.00
1.21
1.47
20
1.00
1.29
1.55
25
1.00
1.35
1.61
30
1.00
1.40
1.66
35
1.05
1.45
1.70
40
1.09
1.49
1.74
45
1.12
1.53
1.78
50
1.16
1.56
1.81
55
1.19
1.59
1.84
60
1.22
1.62
1.87