All shields must be used in accordance with OSHA 29 CFR Part 1926 Subpart P (Federal, State or local) under the direction of a competent person or qualified person.

Inside length clearance is approximately 2 feet less than overall length of trench shields. 
Others sizes available upon request.

PSF Ratings and depths are based on short term exposure with excavation open a period of time equal to 24 hours or less. Consult manufacturer should long term exposure be required. Depths are based on A, B, C soil types as described in OSHA'S 29 CFR part 1926 Subpart P, with Type A not exceeding 25 PSF per foot of depth, Type B not exceeding 45 PSF per foot of depth, and Type C not exceeding 60 PSF per foot of depth. Determine actual soil pressures and consult Manufacturers Tabulated Data prior to each use.