Why may unreinforced masonry shear walls still overturn despite roof dead load?
Choices
- (A) Rocking couples need tie-chord continuity and foundation lever arms beyond mass alone
- (B) Dead load always recentres rocking piers automatically
- (C) Out-of-plane bending is impossible for thick brick leaves
- (D) Overturning never couples with diaphragm drag forces
Correct answer: (A)
Rocking couples need tie-chord continuity and foundation lever arms beyond mass alone
Explanation
Overturning compares lateral moment to stabilising dead-load lever arms.