1807A.2.4 Freestanding Cantilever Walls
A stability check against the possibility of overturning shall be performed for isolated spread footings which support free-standing cantilever walls. The stability check shall be made by dividing Rp used for the wall by 2.0. The allowable soil pressure may be doubled for this evaluation.
Exception: For overturning about the principal axis of rectangular footings with symmetrical vertical loading and the design lateral force applied, a triangular or trapezoidal soil pressure distribution which covers the full width of the footing will meet the stability requirement.