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Hence crit

Slenderness ratios in the E-W and N -S directions are both less than 50, hence it is only necessary to ensure that the end moment is at least Nhl20.

The worst condition occurs with load case 2 at section just above the first floor, where MSd is greatest.

Nh 20

Design end moment = 109 > 12 kNm

2.6.6 Reinforcement details

Maximum spacing of links for internal column

Generally 12 x 20 = 240 mm

Above and below floor 0.67 x 240 = 160 mm Maximum spacing of links for external column

Generally 12 x 25 = 300 mm

At lap and below floor 0.67 x 300 = 200 mm The reinforcement details are shown in Figure 2.11.

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