Approx. steel stress at supports allowing for 30% redistribution

These are conservative figures since they do not allow for excess reinforcement over what is needed or for moment calculated at centreline of support rather than at face of support. Check limits on either bar size or spacing.

From EC2 Table 4.11, 25 mm bars in spans are satisfactory at any spacing since

steel stress < 200 N/mm2 OK

From EC2 Table 4.12, bar spacing at supports should be < 150 mm with no limitation on size. As bars are located inside column bars the maximum possible spacing is 125 mm OK

2.4.8 Curtailment of reinforcement

Reinforcement must extend for a distance of a, + /bnet beyond the moment envelope where

al =


= 198 mm

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