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Steel trivot plate <br /> 8-in diameter concrete <br /> construction (6-10in high) <br /> t e . <br /> Excavation to competent <br /> :. strata (1-2ft deep) <br /> Rock bolts-3 to Oft length <br /> driven to refusal with a <br /> 16 lb sledge- or equivalent <br /> Figure Not To Scale <br /> FIGURE A-1 MONUMENT CONSTRUCTION DETAILS <br /> r% <br />