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Shearwalls implements all load cases corresponding to the four windward corners and lateral and transverse loading. According to this procedure, the increased wind loading at the ends of walls is applied to each corner of the building independently. The program determines the worst of these cases for use in design of shear walls on each shear line. The method of viewing each of these cases independently is described in the Loads and Forces Settings.
Unlike all other design cases in Shearwalls, the program applies east-west and north-south loads simultaneously. This effects torsional distribution of force to shear lines for rigid diaphragms.
The program displays a large oblique arrow on the screen indicating which load case is being viewed, and also indicates the load case in the Load Input View list and the load table in the Design Results, and displays the critical load case in the shear results table.
Using the Show menu, it is possible to view on the screen Case A in the longitudinal direction at the same time as Case B in the transverse direction, as these are the cases that will ordinarily govern for design. In this case, the program shows the load arrows appearing at right angles.