For lateral support of heavily loaded excavation support and earth retention systems, bracing within the excavated area can be installed in situations where Tie-backs cannot be used. These can be steel pipes, steel beams or occasionally pre-cast concrete elements. Bracing can span across the excavation such that the bracing are attached to the walls of the shoring system. Alternatively, bracing be cast into concrete "heel" blocks in the bottom of the excavation, some distance from the braced wall (see below).
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