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The program implements the design provision from AWC Special Design Provisions for Wind and Seismic 3.1.1.1., that was formerly also in IBC 2306.2.1 for editions 2006 and earlier. This changes the repetitive member factor for wall studs based upon wall stud size.
A checkbox in Column mode is used to indicate whether the member meets the sheathing requirements of SDPWS 3.1.1.1.
The system factors from the table in SDPWS 3.1.1.1, with factors ranging from 1.5 for 2 x 4 studs to1.15 for 2 x 12 and higher, are implemented when the following is true:
- the Repetitive Member checkbox is checked
- checkbox in Column Input view indicating that 3.1.1.1 is to be applied is checked.
- the joist spacing is no more than 16”
The system factor is applied only to design for those load combinations which contain a wind load. Other load combinations use the 1.15 system factor.