| http://www.w3.org/ns/prov#value | - Typically, there are two systems in excavation shorings that must be designed: A) the Earth Retention System that contains the earth i.e. the support wall (sheet pile, diaphragm wall, etc.), and b) the Support System (i.e. the internal or external bracing such as rakers, struts, or tiebacks) that supports the earth retention system.
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