The principle weakness of light frame construction is the ______ strength of the _____ and the connections.

• A. Lateral, Walls
• B. Vertical, Roofs
• C. Torsional, Floors
• D. Shear, Column

Answer: (A)

In light-frame construction, gravity loads are carried mainly by vertical members, but the structure’s ability to resist sideways forces depends on the walls and how they’re connected to the rest of the frame. The critical factor is the walls’ lateral (shear) strength and the effectiveness of the fasteners and connections tying wall assemblies to diaphragms and to the roof and foundation. If bracing is inadequate or connections fail, lateral loads from wind, fire, or impacts can cause the walls to shear and bow, leading to rapid loss of stability and potential collapse. That’s why the lateral strength of the walls and the connections is the principal weakness.