OSHA Interpretations 126.652

Interpretation and Compliance Letters for 29 CFR Standard 1926.652
Requirement for Protective Systems

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	[10/20/1999] Trench shields must be installed to prevent lateral movement in a collapse.
	[10/15/1999] Excavations may be shored with wooden shoring.
	[02/01/1996] Clarification of house foundation/basement excavation; Fall protection requirements.
	[09/07/1995] Concerns with the OSHA June 30 memorandum concerning the application of 29 CFR 1926.652 to house foundation/basement excavations.
	[06/30/1995] Suspension of 29 CFR 1926.652 to House Foundation/Basement Excavations.
	[04/05/1995] Whether or not organic rock, such as "Miami oolite rock" should be considered by OSHA as "stable rock".
	[03/28/1994] Safety Procedures During Gunite and Shotcrete Pool Construction.
	[07/16/1993] Minimum length that an excavation must be before a protective system is required.
	[02/19/1993] Plywood as a substitute for meeting the standard.
	[05/21/1992] Design of Protective Systems in Trenches.
	[05/21/1992] Design of protective systems for employees working in trenches.
	[05/05/1992] Excavation standards relating to aluminum rail.
	[04/15/1992] Use of plywood for shoring and support systems in trenches and excavations.
	[03/10/1992] Classification of soils for providing protective systems in excavations.
	[12/02/1991] Standards addressing excavations
	[11/07/1991] Design and use of trench boxes
	[10/01/1991] Classification and subsequent designs may be used if they have been approved by a registered professional engineer.
	[06/05/1991] Testing of type C soil is not necessary if employees are adequately protected.
	[01/09/1991] Clarification of Standards
	[06/26/1985] Slope should be measured from the five-foot level to grade.
	[10/02/1984] Interpretation of 1926.652, Table P-2
	[08/04/1980] Specific Trenching Requirements.
	[03/09/1977] Shoring sides of trenches in hard or compact soil.
	[09/14/1976] Specific trenching requirements as it pertains to shoring.
	[07/07/1976] Trenching Requirements related to banks.
	[11/18/1975] Clarification of excavations, trenching, and shoring standards.