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The program calculates an uplift anchorage force t for perforated walls to comply with SDPWS 4.3.6.4.2.1. This force from Eqn 4.3-9 from 4.3.6.4.1.1 is
vmax = V / COSbi
where
The program adds the accumulated t line forces, in plf, from perforated walls on upper levels to one created on a lower level, to comply with SDPWS 4.3.6.4.4.
If perforated wall segments are offset such that the t force from an upper floor is distributed over an opening on a lower floor, then the force is distributed as a point force to both supports to the opening.
These t point forces are included in the combined overturning force reported in Elevation View and in the Holddown and Compression Design table of the design results. They are not included in such a way to diminish compression forces.
The t line forces can appear over segmented walls or in gaps in the shear line if a perforated wall exists on a floor above at that location.
If you select For anchorage and drag struts in Show/Hide menu, the line force t is reported in Elevation View as small vertical arrows at the base of the wall. vmax is also listed in the Shear Design table of the design results.