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For each design case and each iteration of the design process, the program selects the shear wall materials on each shear wall. The selection of the final design walls from these design cases is described in Design Cases.
If all walls are forced to have the same material specification, one wall design is performed for all the walls on the line, otherwise a separate design is performed for each wall on the shear line.
For each wall or shear line, the critical shear wall segments for shear design is determined based on the shear force on the element and any capacity factors that depend on element geometry.
Design is performed by cycling through unknown parameters until a design is achieved that satisfies all design criteria .
Material exclusion settings
If gypsum wallboard is specified on the interior face of a shear wall, its contribution to shear resistance is calculated according to CSA O86. However, it is possible to use the Design Settings to specify that contribution of gypsum-based materials should be neglected for either wind or seismic design, or both.