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Storeys Greater than 3.6m
On all storeys greater than 3.6m in height, the gypsum contribution to shear resistance is automatically ignored in load distribution and design to comply with O86 11.3.3.1. This applies to both wind and seismic design. This is done regardless of the design setting that disables gypsum contribution for all levels. The program indicates in the notes to the Shear Results table and the Gypsum Wallboard Percentage table that GWB has been ignored for this reason.
Balanced Gypsum and Wood
To comply with CSA O86 11.3.3.1 Note (1), when gypsum exists and is used to resist shear force, a note is output under the Materials table, the Shear Results table and the Gypsum Wallboard Percentage table indicating that a balanced distribution of gypsum wallboard is needed
Seismic Requirements
Refer to Seismic Design Considerations - Maximum Percentage Gypsum Wallboard for restrictions on gypsum wallboard for seismic design.