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1926.652(g) Shield Systems
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1926.652(g)(1) General
1926.652(g)(1)(i)
Shield systems shall not be subjected to loads exceeding those which the system was designed to withstand.
1926.652(g)(1)(ii)
Shields shall be installed in a manner to restrict lateral or other hazardous movement of the shield in the event of the application of sudden lateral loads.
1926.652(g)(1)(iii)
Employees shall be protected from the hazard of cave-ins when entering or exiting the areas protected by shields.
1926.652(g)(1)(iv)
Employees shall not be allowed in shields when shields are being installed, removed, or moved vertically.
1926.652(g)(2) Additional Requirement for Shield Systems Used in Trench Excavations
Excavations of earth material to a level not greater than 2 feet (.61 m) below the bottom of a shield shall be permitted, but only if the shield is designed to resist the forces calculated for the full depth of the trench, and there are no indications while the trench is open of a possible loss of soil from behind or below the bottom of the shield.
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Related Code Sections
1926.652(g)(1)(iii) Excavations,
Employees shall be protected from the hazard of cave-ins when entering or exiting the areas protected by shields ...
1926.652(c) Excavations, Design of Support Systems, Shield Systems, and Other Protective Systems
Designs of support systems shield systems, and other protective systems shall be selected and constructed by the employer or his designee and shall ...
1926.652(c)(1) Excavations, Option (1)-Designs Using Appendices A, C and D
Designs for timber shoring in trenches shall be determined in accordance with the conditions and requirements set forth in appendices A and C ...
1926.652(c)(2) Excavations, Option (2)-Designs Using Manufacturer's Tabulated Data
Design of support systems, shield systems, or other protective systems that are drawn from manufacturer's tabulated data shall be in accordance ...