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New York City Site Safety Manager (SSM) Certification Practice Test

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Chapter 33, Section 3305.3.2.6.3- Where shore height exceeds ____ feet, or when necessary to provide structural stability, diagonal bracing shall be provided.
Correct Answer:
10 ft
Explanation:
When shore height increases, the risk of sideways movement and instability grows. Diagonal bracing provides a triangulated setup that ties the vertical shores together, stiffening the frame so it can resist lateral forces from loads or earth pressure. The code requires diagonal bracing once the shore height exceeds a specific threshold—ten feet—so that the system stays rigid and safe as it becomes taller and more prone to bowing or tipping. It also allows for bracing to be added whenever needed to maintain stability, even if the height is not quite at that threshold. In practice, braces run diagonally between adjacent shores and crossheads, creating triangles that effectively transfer and distribute loads to the ground, reducing the risk of collapse.

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