Overview. Identify different soil types. Understand the methods of testing the soil. Understand the soil mechanics. Understand the weight of the soil. Review case studies. Understanding workers rights. Soil Types. Stable Rock is natural solid mineral matter that can be excavated with vertical sides and remain intact while exposed.
1926 Subpart P App A - Soil Classification - Occupational Safety …
Soil classification system means, for the purpose of this subpart, a method of categorizing soil and rock deposits in a hierarchy of Stable Rock, Type A, Type B, and Type C, in decreasing order of stability. The categories are determined based on an analysis of the properties and performance characteristics of the deposits and the environmental ...
Soil Classification | Transcript | Occupational Safety and Health ...
OSHA classifies soils into three main groups: Type A, Type B, and Type C. Type A is the most stable and Type C is the least stable soil. To determine the soil type on a construction site, there are several tests that a competent person can use.
eCFR :: Appendix A to Subpart P of Part 1926, Title 29 -- Soil ...
Type A means cohesive soils with an unconfined compressive strength of 1.5 ton per square foot (tsf) (144 kPa) or greater. Examples of cohesive soils are: clay, silty clay, sandy clay, clay loam and, in some cases, silty clay loam and sandy clay loam. Cemented soils such as caliche and hardpan are also considered Type A.
Here is an overview of the different rock and soil types spelled out in the OSHA excavation standard, starting with the most stable and least likely to cave-in, and ending with the most unstable type:
Engineer's Corner: OSHA Soil Types and Their Impact on Shoring …
2017年9月16日 · The appendix outlines three soil types in descending order of stability, Type A, Type B, and Type C. Anyone that works with excavation shoring systems and has had a Competent Person training class should recognize these terms and understand them to …
Soil is the unconsolidated mineral and organic matter on the surface of the earth that has been subjected to, and shows effects of genetic and environmental factors of: climate (including water and temperature effects), and macro- and microorganisms, conditioned by relief, acting on parent material over a period of time.
OSHA Technical Manual (OTM) - Section V: Chapter 2
OSHA categorizes soil and rock deposits into four types, A through D, as follows: A. Stable Rock is natural solid mineral matter that can be excavated with vertical sides and remain intact while exposed.
Type A soil (clay, silty clay and hardpan) is the most stable. Type B soil (silt, sandy loam, medium clay, and unstable dry rock) has medium stability. Type C (gravel, loamy sand, soft clay, submerged soil, or dense, heavy, unstable rock) is the least stable, and requires the greatest safety precautions when excavating.
Excavations Benching and Sloping Toolbox Safety Talk
There are two basic types of benching, simple and multiple. The type of soil determines the horizontal to vertical ratio of the benched side. As a general rule, the bottom vertical height of the trench must not exceed 4 ft for the first bench.