Excellent for pipeline and sewer work, these 10 ft. by 10 ft. shields are designed and certified by Registered Professional Engineers to optimize strength-to-weight ratios while maintaining minimal sidewall thickness. The double-wall construction doubles the strength of the sidewall for maximum stability. Two, three, or four-sided shields are available to meet job conditions. Each United Rentals trench shield includes data specifying the depth and soil conditions that the shield is designed to withstand. This enables you to conform to OSHA excavation and trench regulations.