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Excavation guide Saudi Aramco Safety Management Guide Excavations and Shoring Guide Number - - Table Of Contents Purpose References De ?nitions Before Work Starts Work Permits Underground Utilities and Installations Dewatering Protection Against Sidewall

Saudi Aramco Safety Management Guide Excavations and Shoring Guide Number - - Table Of Contents Purpose References De ?nitions Before Work Starts Work Permits Underground Utilities and Installations Dewatering Protection Against Sidewall Cave-In Entry and Exit Hazardous Atmospheres and Materials Emergency Response Edge Protection Clearances Barricades and Fixed Lighting Roads Streets and Sidewalks Inspections Back ?lling Attachments A Tables and Figures A Excavation Safety Checklists Prepared by the Loss Prevention Department December CExcavations and Shoring Issue Date December Excavations and Shoring Purpose This guide describes the minimum expectations for excavation trenching and shoring activities at Saudi Aramco SA facilities and project sites It is based on and replaces the ??Excavations Trenching and Shoring ? chapter of the Saudi Aramco Construction Safety Manual CSM and will be included in the next revision of this manual References Saudi Aramco General Instructions GIs GI Street and Road Closure Excavation Reinstatement and Tra ?c Controls GI Work Permit System Saudi Aramco Engineering Standards SAES SAES -A- Borrow Pit Requirements SAES -A- Excavation and Back ?ll Saudi Aramco Safety Handbook Saudi Aramco Standard Drawing SASD AB- Standard Speci ?cations for Shoring Trenches American National Standards Institute ANSI ANSI ASSE A Safety Requirements for Excavation United States Code of Federal Regulations CFR CFR Subpart P Excavations also cited as OSHA Subpart P De ?nitions Benching ?? A method of protecting personnel from sidewall cave-in by excavating the sides of an excavation to form one or more of a series of horizontal steps with a vertical rise between each step Competent Person ?? A person who has and is able to demonstrate the following Documented training experience and knowledge of a soil analysis b use of protective systems Ability to detect a conditions that could result in sidewall cave-in b failures in protective systems c other hazards including those associated with con ?ned spaces dewatering and Written authority to take prompt corrective measures to eliminate existing and predictable hazards Guide Number - - Page of CExcavations and Shoring Issue Date December Excavation ?? Any man-made cut cavity trench or depression in an earth surface that is formed by earth removal Excavation Box ?? A structure that protects personnel inside it by withstanding the forces imposed by sidewall cave-in on four sides Hydraulic Shoring ?? A pre-engineered shoring system of aluminum or steel hydraulic cylinders cross-braces used with vertical rails uprights or horizontal rails walers and designed speci ?cally to support side walls of an excavation to prevent cave-in Protective Systems ?? Methods used to protect personnel from sidewall cave-in materials that could fall or roll into the excavation or collapse of adjacent structures Protective systems include sloping benching and shoring Shoring ?? Hydraulic timber or mechanical systems that support the sides of an excavation which is designed to prevent sidewall cave-ins Sloping ?? A method of protecting personnel from sidewall cave-in by forming sides of an excavation that are inclined away from the excavation The safe angle of slope required varies with di ?erent types of soil