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Development in concrete and reinforced concrete
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28 days arch assumed base beam bending bond bottom building cent center of gravity cinder concrete column strips compressive strength compressive stress computed considered constructed counterforts crete cubic cubic foot deformed bars depth designed Diagram diameter dimensions distance dropped panel engine equal Equation f-inch round bars factor of safety feet finish floor forms formula foundation girder greater hoisting horizontal inches thick joints layer length less lime load machine masonry material method mixed mixer mixture mortar neutral axis pier placed plain bars plank Portland cement pounds per square pressure proportion reinforced concrete reinforced-concrete reinforcing steel resistance retaining wall safe sand shearing stress shown in Fig shows side slab soil spacing span spiral square foot square inch stirrups stone strength structural surface T-beam Table tank tensile tensile stress tension tests usually vertical volume water-cement ratio waterproofing weight width