TSC Minimum Spacing of Reinforcement

Symbols

d_agg = Nominal maximum size of coarse aggregate, in.
d_b = Nominal diameter of bar, wire, or prestressing strand,

According to TS 500 9.5.2, for parallel reinforcement in a horizontal layer, clear spacing is controlled automatically at least the greatest of

• 25 mm

• d_b

• (4/3)d_agg

According to TS 500 9.5.2, for longitudinal reinforcement in columns, pedestals, struts, and boundary elements in walls, clear spacing between bars is controlled automatically at least the greatest of

• 40 mm

• 1.5d_b

• (4/3)d_agg