Reinforced Concrete – Principle, Rebar and Cover

Concrete excels in compression but is weak in tension. Reinforcing steel bars (rebar) are embedded to carry tensile forces, producing a composite material that handles both. This topic explains the structural logic behind reinforced concrete, the properties and grades of rebar used in the UK under BS 4449, how bar sizes and spacings are specified, the critical importance of cover to protect reinforcement from corrosion, and how to read a reinforcement drawing and bar schedule on site.

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