Spacing requirements for columns

The maximum spacing of transverse reinforcement (i.e. links) in columns (Clause 9.5.3(1)) should not exceed:

■ 12 times the minimum diameter of the longitudinal bars.

■ 60% of the lesser dimension of the column.

At a distance greater than the larger dimension of the column above or below a beam or slab these spacings can be increased by a factor of 1.67. The minimum clear distance between the bars should be the greater of the bar diameter, aggregate size plus 5 mm or 20 mm. No longitudinal bar should be further than 150 mm from transverse reinforcement (links) in the compression zone.

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