Why must tilt-up panels be checked for temporary overturn during erection-stage wind?
Choices
- (A) Unset bracing leaves tall lever arms reacting to parapet suction before diaphragms mobilise
- (B) Wind never applies moment once panels vertical
- (C) Construction wind loads are stipulated zero for cladding
- (D) Only crane rigging dictates panel stability post lift
Correct answer: (A)
Unset bracing leaves tall lever arms reacting to parapet suction before diaphragms mobilise
Explanation
Without roof diaphragm ties panels act as slender cantilever plates to wind suction.