Installation Manual

DynoRaxx Evolution PR Guide to Code Compliant Installation
6 | 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
Task 1: Calculate the Basic Wind Speed V. This value is defined to be: the largest three second gust of wind at
33ft above the ground in exposure category C. It will be assumed that the wind will come from any horizontal
direction. In order to determine this value, please consult the following map and look up the value of V in the
installation site:
Figure 1: Basic Wind Speed, V (ASCE 7-05 figure 6-1 p.33)
Task 2: Determine the mean roof height of the building in feet.
Task 3: Determine , the adjustment factor for building height and exposure category. There are three
exposure categories:
 Exposure B:
 Suburban and residential areas with mostly single-family dwellings
 Low-rise structures, less than 30 feet high
 Urban areas with numerous closely spaced obstructions having size of single family dwellings or larger
 Exposure C:
 Flat open grasslands with scattered obstructions having heights generally less than 30 feet
 Open terrain with scattered obstructions having heights generally less than 30 feet for most wind
directions
 Structures are all less than 1500 feet or 10 times their height, whichever, from an open field that
prevents the use of Exposure B