ANSI ASSP A10.12 pdf free download
ANSI ASSP A10.12 pdf free download.Construction and Demolition Operations Safety Requirements for Excavation.
1.2.11 Excavation. Any manmade cut, cavity, trench or depression in an earth surface, formed by earth removal.
1.2.12 Excavation Competent Person. One who has received training and can demonstrate knowledge, skills and abilities to fulfill the duties required by this standard and who is capable of identifying existing and predictable hazards in the surroundings or working conditions that are unsanitary, hazardous or dangerous to employees, and who has the authorization and the responsibility to take prompt corrective measures to eliminate or control the hazards and conditions.
1.2.13 Excavation Safety and Health Plan. The written safety and health plan developed by the contractor for the excavation work that describes the requirements and procedures to be implemented. See Section 2.
1.2.14 Faces. The vertical or inclined earth surfaces formed as a result of excavation work.
1.2.15 Failure. The breakage, displacement or permanent deformation of a structural member, mass, component or connection so as to reduce the structural integrity and/or the supportive capabilities of the worker-protection system.
1.2.16 Hazardous Atmosphere. An atmosphere that (by reason of being explosive, flammable, poisonous, corrosive, oxidizing, irritating, oxygen deficient, toxic or otherwise harmful), may cause death, illness or injury.
1.2.17 Kickout. The accidental release or failure of a cross brace.
1.2.18 Owner. The public body or authority, corporation, association, firm or person with whom the contractor has entered into an agreement and for whom the work is to be provided.
1.2.19 Protective System. Method employed by the contractor to protect employees from cave-ins, from material falling or rolling into an excavation, or from the collapse of adjacent structures. Protective systems include support systems, sloping and benching systems, shield (trench box) systems and other systems that provide the necessary protection.
1.2.20 Ramp. An inclined walking or working surface that is used to gain access to one point from another, and is constructed from earth or from structural materials such as steel or wood.
1.2.21 Registered Professional Engineer. A person who is licensed as a professional engineer in the state where the work is to be performed. However, a professional engineer licensed in any state is deemed to be a registered professional engineer within the meaning of this standard when approving designs for manufactured protective systems or tabulated data to be used in interstate commerce.
1.2.22 Sheeting. The members of a shoring system that retain the earth in position and in turn are supported by other members of the shoring sister. Sheeting is 2- or 3-inch or thicker dimension lumber as specified in Appendixes C and D or manufactured members of equivalent strength.
1.2.23 Shield or Trench Box (Shield System). A structure that is able to withstand the forces imposed on it by a cave-in and thereby protect employees within the structure. Shields can be permanent structures or can be designed to be portable and moved along as work progresses. Additionally, shields can be either pre-manufactured or job-built in accordance with Sections 3.3.3 or 3.3.4. Shields used in trenches are usually referred to as trench boxes or trench shields.ANSI ASSP A10.12 pdf download.
