Why emphasise heavier back-span counterweights in asymmetric cable‑stayed bridges?
Choices
- (A) Stay tension lifts the deck so back spans anchor overturning couples at pylons
- (B) Back spans decorate pylons statically only
- (C) Cable tensions equilibrate without horizontal thrust
- (D) Towers resist bending without deck participation
Correct answer: (A)
Stay tension lifts the deck so back spans anchor overturning couples at pylons
Explanation
Back spans balance stay forces pushing pylons seaward