AL Sewer Projects Practice Questions - Alabama Sewer Projects Contractor Examination Exam

What is the main purpose of a trench shield (trench box) in sewer construction?

To increase the density of pipe bedding automatically To protect workers from cave-ins while work is performed inside the shield To replace the need for any pipe joints To mark utility locations for Alabama 811

Correct Answer:

To protect workers from cave-ins while work is performed inside the shield

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