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12 x 804

Either limit bar size using EC2 Table 4.11 or bar spacing using Table 4.12. 4.4.2.3(2 In Table 4.11 bar size < 25 mm > 32 mm used.

In Table 4.12 spacing < 285 mm in pure flexure > 250 mm used. . OK

Check minimum reinforcement requirement 4.4.2.3(2

For it is considered conservative to use (hl2)b. a = 100% x f, = 460 N/mm2

s yk

For f use minimum tensile strength suggested in EC2, 3 N/mm2.

kc = 0.4 for bending

For k interpolate a value for h = 75 cm, which gives k = 0.53. Therefore

As > 0.4 x 0.53 x 3 x 750 x 3000/(2 x 460) = 1555 mm2 12T32 gives As > 1555 mm2 OK

7.1.2.9 Detailing

Check bar achorage detail at LH end.

The anchorage should be capable of resisting a tensile force 5.4.2.1. FS = VaA/cf with a, = of 5.4.3.2.

VS6 = column reaction = 1896 kN

The bond strength for poor conditions in the top of the pour 5.2.2.1

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