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Solid slabs: the maximum spacing of flexural reinforcement bars smax,slabs

Eurocode 2 part 1-1: Design of concrete structures (3)


The recommended value for the spacing of bars smax,slabs is:

  • for the principal reinforcement, 3h ≤ 400 mm, where h is the total depth of the slab;
  • for the secondary reinforcement, 3,5h ≤ 450 mm.

In areas with concentrated loads or areas of maximum moment those provisions become respectively:

  • for the principal reinforcement, 2h ≤ 250 mm;
  • for the secondary reinforcement, 3h ≤ 400 mm.

National choice