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Include deflection analysis
This check box is used to control whether the program calculates shear wall deflection and imposes story drift limitations. If it is not checked, the design will run more quickly, but the load and force distribution options are more limited. The ability to distribute loads to shear lines for rigid diaphragm analysis, and to distribute forces within shear lines, using rigidities derived from deflection analysis (stiffness), is not available.
Worst-case rigid vs. flexible diaphragms (Envelope design)
Select this if you wish to have the program determine the strongest of the walls designed for forces distributed with the rigid diaphragm method as opposed to the flexible diaphragm method. This would be selected to conservatively address the semi-rigid condition by taking the worst of rigid and flexible design in an envelope approach.