# Federal Register
1 - 1926.652(b) - 85:67013-67015 - Excavations (Design of Cave-in Protection Systems); Extension of the Office of Management and Budget's (OMB) Approval of Information Collection (Paperwork) Requirements
2 - 1926.652(b), 1926.652(b)(3), 1926.652(b)(4) - 85:67013-67015 - Excavations (Design of Cave-in Protection Systems); Extension of the Office of Management and Budget's (OMB) Approval of Information Collection (Paperwork) Requirements - PDF
3 - 1926.652(b) - 79:65704-65705 - Agency Information Collection Activities; Submission for OMB Review; Comment Request; Excavation Cave-in Protection System Design Standard - PDF
4 - 1926.652(b) - 79:44199-44201 - Excavations (Design of Cave-In Protection Systems); Extension of the Office of Management and Budget's (OMB) Approval of Information Collection (Paperwork) Requirements - PDF
# Letters of Interpretation
1 - 1926.652(b)(4) - Regulations governing sloping and benching systems for excavations.
2 - 1926.652(b)(4) - Can a person who qualifies as a "competent" person under one section of support P also qualify as a competent designer of structural ramps under 1926.651(c)(1)(i)?.
3 - 1926.652(b)(2) - Can a person who qualifies as a "competent" person under one section of support P also qualify as a competent designer of structural ramps under 1926.651(c)(1)(i)?.
4 - 1926.652(b), 1926.652(b)(2), 1926.652(b)(4) - Can a person who qualifies as a "competent" person under one section of support P also qualify as a competent designer of structural ramps under 1926.651(c)(1)(i)?.
5 - 1926.652(b) - Protective system requirements for excavations that will not be entered by employees.
6 - 1926.652(b) - Permissibility of using average excavation depth to determine protective system requirements for the excavation.
7 - 1926.652(b)(4) - Registered professional engineer approval requirements for combination trench shield and sloping system trenches with a depth greater than 20 feet.
8 - 1926.652(b)(3) - Registered professional engineer approval requirements for combination trench shield and sloping system trenches with a depth greater than 20 feet.
9 - 1926.652(b), 1926.652(b)(3), 1926.652(b)(4) - Registered professional engineer approval requirements for combination trench shield and sloping system trenches with a depth greater than 20 feet.
10 - 1926.652(b) - Registered professional engineer approval requirements for manufactured trench protection systems deeper than 20 feet.
11 - 1926.652(b) - Requirements to prevent trench collapse during sheet-pile operations.
12 - 1926.652(b) - Trench shield must extend 18" above excavation walls when below grade.
13 - 1926.652(b)(1)(i) - Classification of soils for providing protective systems in excavations.
# Regulations
1 - - Requirements for protective systems.