Sw

area within critical perimeter - column area 4.3.4.5.2(4)

Denominator =

(300 + 3 x 185)2 - (1.5 x 185)2(4 - it) - 3002 = 575000 mm2 Thus E/A . > 0.0012 x 575000 = 690 mm2

sw.min

Maximum spacing of links is determined by the ratio v^/v^ where it is 5.4.3.3(4) assumed that vRd2 is calculated in accordance with EC2 4.3.2.4.3(4). 5.4.2.2(7)

ck_ 200

Eqn 4.25 Eqn 4.21

Therefore

= (-L-) x 0.55 x 20 x 0.9 x 185 = 174/916 = 0.19 < 0.2

Eqn 5.17

Longitudinal spacing > 0.75d = 138 mm Transverse spacing > d

Placing shear links on 100 mm grid in 700 mm square gives 48 links with 44 4.3.4.5.2(2) inside the critical perimeter.

By inspection the minimum preferred bar size will govern and mild steel links could be used.

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