tot where

K is a factor dependent upon the shape of the being moment diagram. For a simply supported beam with uniformly distributed load

Total curvature at mid-span, from Section

BS 8110: Part 2 Section 3

Therefore maximum deflection at mid-span a,, = 0.104 x 72 x 5.130 = 26.2 mm tot

Again this is close to the rigorously assessed value.

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