Page 33 - Trench and Excavation

6 feet - Trenches 6 or more feet in depth, and 15 inches or more in width are required to
have fall protection on the Crossover Bridge
6 feet - Barricades should be kept at least 6 feet from the hazard
7.5 feet - Maximum depth for a residential foundation excavation to be exempted from
Trenching Regulations
8 feet- All excavations 8 feet or less in depth in TYPE A soil which have unsupported
vertically sided lower portions shall have a maximum vertical side of 3.5 feet and
~ maximum allowable slope of 3/4H: 1V
12 feet - All excavations more than 8 feet, but less than 12 feet in depth in TYPE A soil
which have unsupported vertically sided lower portions shall have a maximum
vertical side of 3.5 feet and have a maximum allowable slope of 1H: 1H
12 feet - Simple slope excavations in TYPE A soil which are 12 feet or less in depth can be
sloped at 1/2H: 1V
15 feet - Maximum width for excavation to be a trench
20 feet - Maximum trench depth for Competent Person to design the protective system
20 feet - Maximum trench depth to use tables in Appendix B, C, and D
25 feet - Maximum allowed travel distance to a ladder

Trench & Excavation
Competent Person Training P3 Safety Solutions LLC
Page 33