SC Grading Practice Questions - South Carolina Grading Contractor Examination Exam

A trench shield may be used with the excavation as much as 2 feet below the bottom of the shield only if:

The crew wants a sump for water The shield is designed to resist the forces calculated for the full depth of the trench and there is no indication of soil loss from behind or below the shield The soil is Type C Employees ride in the shield while it is being installed or moved vertically

Correct Answer:

The shield is designed to resist the forces calculated for the full depth of the trench and there is no indication of soil loss from behind or below the shield

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