Excavation Safety: Protective Systems

Additional Requirements for Protective Systems:

• Remove support systems as you backfill the trench
• Extend trench boxes and shields to the bottom of the trench and no less than 18 inches above the vertical part of the trench face, except in certain cases
• Do not allow employees in shields during their installation, removal or relocation
• When portable trench boxes are stacked, provide attaching means to prevent them from separating
• Do not work outside of trench shields or shoring protection in unprotected trenches 

CALL 811 BEFORE YOU DIG!