Out-of-plane Wall and Wall Anchorage Forces

Important Note – These are descriptions to changes implemented in WoodWorks Shearwalls for version 10.0 and may not reflect current behavior

The program now shows calculates and displays the out-of-plane forces for structural walls from ASCE 7 12.11.

1. Out-of-plane Force

   The out-of-plane force is calculated using 12.11.1 and the self-weight of the wall as input in the Load Generation dialog.

2. Wall Anchorage Force

   The wall anchorage force is calculated using Eqn. 12.11-1. In section 12.11.2.1.The length used for the ka factor in Eqn. 12.11-2 is the shearline length (including any non-shearwalls and openings or gaps within the line, but not gaps at between the end of the line and the end of the floor or ceiling diaphragm).

   For rigid diaphragms, the height factor given in the penultimate paragraph in 12.11.2.1 uses the eave height as roof height z.

3. Elevation view Output

   At the end of a shearline in elevation view, where C&C loads are shown for wind design, for seismic design the program shows the factored anchorage and out-of-plane forces.

   For flexible diaphragms, the program shows the out-of-plane and anchorage force at the top of the wall. For rigid diaphragms, it shows the anchorage force at the top and bottom of the wall, as these differ due to the height factor. So both rigid and flexible design is needed to see all of these forces.