QAQC in Construction

(a) Scope and application - (1) Scope. This appendix describes a method of classifying soil and rock deposits based on site and environmental conditions, and on the structure and composition of the earth deposits. The appendix contains definitions, sets forth requirements, and describes acceptable visual and manual tests for use in classifying soils. (2) Application. This appendix applies when a sloping or benching system is designed in accordance with the requirements set forth in 1926.652(b)(2) as a method of protection for employees from cave-ins. This appendix also applies when timber shoring for excavations is designed as a method of protection from cave-ins in accordance with appendix C to subpart P of part 1926, and when aluminum hydraulic shoring is designed in accordance with appendix D. This Appendix also applies if other protective systems are designed and selected for use from data prepared in accordance with the requirements set forth in 1926.652(c), and the use of t

I. Introduction Excavating is recognized as one of the most hazardous construction operations. OSHA recently revised Subpart P,  Excavations , of  29 CFR 1926.650 ,  29 CFR 1926.651 , and  29 CFR 1926.652  to make the standard easier to understand, permit the use of performance criteria where possible, and provide construction employers with options when classifying soil and selecting employee protection methods. This chapter is intended to assist  OSHA Technical Manual  users, safety and health consultants, OSHA field staff, and others in the recognition of trenching and shoring hazards and their prevention. II. Definitions A. Accepted Engineering Practices  are procedures compatible with the standards of practice required of a registered professional engineer. B. Adjacent Structures Stability  refers to the stability of the foundation(s) of adjacent structures whose location may create surcharges, changes in soil conditions, or other disruptions that have the potent