Civil's Guide
Reinforcement Tables
Reinforcement
Reinforcing bars are generally designated as B6,B8,B10,B12,B16,B20,B25,B32 and B40, although B40 is not generally used. This is generally due to procurement
and that the bending radius of the bar and required lap/anchcorage length can make it impractical in designs. The bars are not smooth but have raised ribs on the
surface which improves the bond between the concrete and steel. The characterstic strength for high yield reinforcement is \(f_{yk} = 500N/mm^2\)
Weight of reinforcement bars by diameter (kg/m)
Reinforcement Area (mm2/mm)
Reinforcement Area mm2/mm for various bar spacing
Shear reinforcement
Shear reinforcement is often required in concrete beams but not always needed in lightly loaded floor slabs or pad foundations. Shear is resisted using stirrups or inclined bars (stirrups are often referred to as links).
Table for Asw/s for varying stirrup diameter and spacing below:
Wire Fabric (Reinforcement Mesh)
Sectional areas for varying mesh types
Minimum and Maximum percentages of reinforcement
Elements containing less reinforcement than As minimum should be considered un-reinforced.