OSHA Trench Sloping

Maximum slope ratio per soil class A/B/C and benching geometry.

Run the calculator

Formula and source

Maximum allowable slope ratio (H:V) per OSHA 29 CFR 1926.652 and Appendix B: Type A 0.75:1, Type B 1:1, Type C 1.5:1. Benching geometry per Appendix B Figure B-1.1.

OSHA 29 CFR 1926 Subpart P and Appendix B by section.

Audience

This tile is built for plumbers and the adjacent professions in the Cross-Trade Utilities group. The interactive calculator runs entirely in your browser. No account, no fee, no advertising, no tracking.

Related tools

Posture

Rough Logic answers the math question the working professional asks on the job. The site is a calm, fast, ad-free, account-free, ever-free reference. It does not interpret code. It does not replace the licensed professional. It does not store your inputs. The Authority Having Jurisdiction governs all installations and inspections.