When to use: Design a wood structural panel shear wall resisting lateral force. Enter the applied lateral shear V at the top of the wall, the wall length b, and height h. The tool computes the unit shear v, overturning moment, boundary chord / hold-down force, and checks the panel against the selected APA/SDPWS nailing schedule and the h:b ≤ 3.5:1 aspect-ratio limit for blocked shear walls.