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Design for mSd above in region outside edge column moment transfer zone.

msd 19 6 x 106

bd2fck 1000 x 1752 x 30

Minimum steel sufficient = -x— < 0.0015btd 5.4.2.1.1

Use T12 at 300 mm crs. (373 mm2/m) top and bottom (minimum)

Maximum spacing = 3h > 500 = 500 > 300 mm OK NAD

Column A/1 moment transfer

Assume the design forces for the frame on grid 1 are directly related to those for grid 3 in proportion to their loaded widths.

The ratio of the edge column distribution factors for the frames is 2.0. = 37.9 x 0.41 x 2.0 = 31.1 kNm

Using design approach as for column A/2: be = 300 + ^ (say) = 450 mm

M = 0.15 x 450 x 1752 x 37 x 10"6 = 76 kNm t.max

Design reinforcement to sustain edge moment on 450 mm width

Sd bdzf ck

Use T16 @ 150 mm crs. (1340 mm2/m) top for a width of 600 mm

Check above moment against minimum value required for punching shear. 4.3.4.5.3

> riV,M where y = ± 0.5 per m for corner columns

Eqn 4.59 Table 4.9

Edge moment = 31.1/0.45 = 69.1 kNm/m > 32.1 In region of slab critical for punching shear:

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