Regulatory Reference
OSHA Excavation Standards: 29 CFR 1926 Subpart P
Plain-language summaries of the federal excavation standard, with direct links to the official OSHA text for every section referenced on this site.
29 CFR 1926 Subpart P is OSHA's construction standard for excavations. The summaries below are for orientation only - always confirm current requirements against OSHA's official published text, linked in each section.
Subpart P - Excavations (Overview)
The umbrella standard covering all excavation and trenching work in construction, including soil classification, protective systems, access and egress, and inspection duties.
Read 29 CFR 1926 Subpart P on osha.gov →
1926.650 - Scope, Application, and Definitions
Defines the terms used throughout Subpart P - excavation, trench, sloping, benching, shoring, shielding, Competent Person, and more - and states which operations the standard applies to.
1926.651 - Specific Excavation Requirements
Covers surface encumbrances, underground utility location, access and egress, exposure to vehicular traffic, exposure to falling loads, warning systems for mobile equipment, hazardous atmospheres, protection from water accumulation, stability of adjacent structures, protection of employees from loose rock or soil, inspections, and fall protection for walkways.
1926.652 - Requirements for Protective Systems
Requires a protective system for excavations 5 feet or deeper (unless the excavation is entirely in stable rock or a Competent Person determines no hazard exists), and sets the design criteria for sloping, benching, shoring, and shielding systems, including when a registered professional engineer's design is required.
Appendix A - Soil Classification
Defines Stable Rock, Type A, Type B, and Type C soils, and the visual and manual tests used to classify them. See our Soil Classification page for a plain-language walkthrough.
Appendix B - Sloping and Benching
Sets the maximum allowable slopes and bench dimensions for each soil type. See our Protective Systems page for how this fits alongside shoring and shielding.
Appendix C - Timber Shoring for Trenches
Tabulated data for timber shoring configurations by soil type and trench depth/width, an alternative to aluminum hydraulic shoring in certain conditions.
OSHA Trenching and Excavation eTool
OSHA's interactive reference tool covering hazard recognition, soil analysis, protective systems, and the Competent Person's role, with illustrations and scenario walkthroughs.
Open the OSHA Trenching and Excavation eTool →
OSHA Competent Person Guidance
OSHA's eTool section specifically on the Competent Person's duties, authority, and required qualifications.
Open OSHA's Competent Person guidance →