Deflection internal span

Check end span-to-effective-depth ratio

N = basic effective depth to span ratio: p = 0.32%

= 11 +15 x 30°5x 055 /0.32 + 32 x 3005 (055/ 0.32- 1)15 = 11.0 + 14.1 + 10.7 = 35.8 K = structural system factor

= 1.5 (interior span of continuous slab) F1 = flanged section factor

F2 = factor for long spans associated with brittle partitions

= fyd x (Ae.re, / Aapr„v) x (g + / (^g + (1 / S) = (5C0 /1.15) x (465/502) x [ (5.9 +03 x 33) /123] x 103 = 434.8 x 0.93 x 0.56 x 1.03 = 233 MPa

<Exp. (7.17) & BS EN 1990 A1.2.2> <Concise Table 15.14>

F3 = 310 / 233 = 1.33 Allowable l / d = N x K x F1 x F2 x F3 = 35.8 x 1.5 x 1.0 x 1.33 = 71.4

Max. span = 71.4 x 144 = 10280 mm i.e. > 5795 mm

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