Subscribe icon Subscribe
Oregon OSHA icon Oregon OSHA

Oregon OSHA

Construction Depot

Safety and health newsletter for the Oregon construction industry

February 22, 2016

 
Picture of a trench with a ladder

Construction Q&A: Trench depth with multiple soil types

Q: We need to work in a trench that has three feet of stable rock on the bottom layer and three feet of Type B soil on the top of that. Should we consider the top three feet of Type B soil as part of a six-foot-deep excavation that needs protection, or can we consider it a three-foot-deep excavation that does not need protection?

A: Regardless of the type of soil in the strata, the trench is six feet deep and requires protection. Always protect to the least stable soil type.

 

Share

In this issue:

« Home

Comments or questions about the Construction Depot?

Reprinting, excerpting, or plagiarizing any part of this publication is fine with us!

But remember: the information in this newsletter is intended to highlight safe work practices, but it does not replace Oregon OSHA workplace safety and health rules.

For information about Oregon OSHA services and answers to technical questions, call (503) 378-3272 or toll-free within Oregon, (800) 922-2689.