What can happen to a crane when side loading occurs?

What can happen to a crane when side loading occurs?

• A. the boom can collapse
• B. the outriggers extend
• C. the load becomes self-supporting
• D. the cab locks

Answer: (A)

Side loading creates a sideways force on the crane, which adds a dangerous bending moment to the boom. Cranes are designed to lift mainly along the vertical plane, so a lateral load reduces the stability margin and can cause the structure to fail in bending or buckle. If the lateral force is large enough, especially on unstable ground or with insufficient outrigger support, the boom can collapse. Outriggers are meant to improve stability, but side loading is a condition that can still lead to collapse if not managed. The other options don’t describe what happens under side loading: extending outriggers is an adjustment to improve stability, not a consequence; the load does not become self-supporting; and cab locks are unrelated to lateral stability.

Side loading creates a sideways force on the crane, which adds a dangerous bending moment to the boom. Cranes are designed to lift mainly along the vertical plane, so a lateral load reduces the stability margin and can cause the structure to fail in bending or buckle. If the lateral force is large enough, especially on unstable ground or with insufficient outrigger support, the boom can collapse. Outriggers are meant to improve stability, but side loading is a condition that can still lead to collapse if not managed. The other options don’t describe what happens under side loading: extending outriggers is an adjustment to improve stability, not a consequence; the load does not become self-supporting; and cab locks are unrelated to lateral stability.