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Important Note – These are descriptions to changes implemented in WoodWorks Shearwalls for version 9 and may not reflect current behavior.
Shearwalls imposes the maximum capacity for a perforated shearwalls by replacing the tabulated value with the maximum value if the tabulated value exceeds the maximum. The maxima have changed as follows:
The value for a single side of sheathing for seismic design has been changed from 490 plf to 870 plf. The value for both sides combined for wind design has been changed from 1000 plf to 1217.5 plf.
The previous limit for IBC of 490 plf for each sheathing side, from IBC 2006 2305.8.2.1-2, for wind and seismic, has been removed from the program.
Previously, if an interior, exterior or combined shear capacity exceeded the maximum capacity an exclamation mark was placed in front of the combined shear capacity in the shear output table. Now, if the interior and/or exterior sheathing shear capacity exceeds the maximum . If the combined sheathing capacity exceeds the maximum perforated capacity then the '!' is now placed after the capacity.
The program continues to use Table 4.3.3.5 to determine the perforation factor Co, despite the fact that equations 4.3-5 and 4.3-6 have been moved to section 4.3.3.5 from the Commentary. Note that SDPWS offers a choice of using the equations, based on opening area, and the table, based on segment lengths and maximum opening height. A future version of Shearwalls will allow for this choice.
The following SDPWS clauses related to perforated walls and deflection analysis have been implemented:
For perforated shearwalls, the v used in equation C4.3.2-1 for shearwall deflection is vmax given in by Eqn. 4.3-9 in 4.3.6.4.1.1, as per per SDPWS 4.3.2.1., that is, v divided by the perforation factor Co.
For perforated shearwalls, the length b is the sum of the lengths of the full-height segments, as per SDPWS 4.3.2.1, and one deflection is calculated for the entire wall.