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Confinement Reinforcement Spacing

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Special transverse reinforcement for confinement is required (zone 4) over
a distance Lo at the column ends where
Lo equals the maximum of:

Depth of member:
1/6 clear height of column:
18":

I'm reviewing a concrete building, with some rectangular shape concrete
columns  that are  130cm (51.1") x 60cm (23.6")
with a clear height of 106". Is my governing Lo = 51.1" from each end? If
so it's almost the whole column clear height.

Any comments?

Regards,

Nick.