Indirect supports

As the ribs of the slab are not supported at the top of the supporting beam <9.2.5, Fig. 9.7>

sections (A, B, C, D), additional vertical reinforcement should be provided in these supporting beams and designed to resist the reactions. This additional reinforcement should consist of links within the supporting beams (see Beams design, Section 4. 4.9).

Support A (and D) at solid/rib interface:

Aere, = 26.3 x 1000 / (500 / 1.15) = 60 mm2 <Fig. 9.7>

This area is required in links within h / 6 = 300 / 6 = 50 mm of the ribbed/solid interface and within h / 2 = 300 / 2 = 150 mm of the centreline of the rib.

Support B (and C) at solid/rib interface, VEd = 37.9 kN / rib

Asreq = 37.9 x 1000 / (500 / 1.15) = 87 mm2 placed similarly

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