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Important Note – These are descriptions to changes implemented in WoodWorks Shearwalls for version 10.0 and may not reflect current behavior
There is no longer an importance factor I for wind design. Instead different maps are provided for different Risk Categories (ASCE 26.5) instead of a single map with importance factors to be applied for each risk category. Therefore, the importance factor has been removed from Shearwalls for wind design as follows:
The Occupancy input in the Site Information dialog has been moved from a general area to the Seismic design section and renamed Risk Category. The associated echo of this input in the Design Results has been moved to the seismic section.
The output no longer has shows IBC Occupancy and ASCE Equivalent. There are still substantial differences in the phrasing and the specification of buildings included between ASCE 7 and IBC, but no consequential differences in making any of the four selections.
The input echo has also been removed from the wind load section of the log file.
Generated wind loads are no longer multiplied by an importance factor I. The output of this factor and of the symbol I in the wind load equation has been removed from the log file output.
The wind importance factor for ASCE 2005 was influenced by the proximity to shoreline for hurricane-prone regions. As there is no longer a wind importance factor, the checkbox for Hurricane prone region has been removed from the Site Information dialog.