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[knsheth123]

Dear Professionals

For Floating Columns, I express my view point as below:
1. Avoid as far as possible.
2. In case inevitable:
a) Have shear walls as primary lateral load resisting elements
b) Not to provide Floating Columns from cantilevers as vertical EQ
coefficient is 5 times for cantilevers
c) The floating column must start from beams along both axes to resist
any design BM, Torsion in floating column will be resisted by floor diaphram
action.
d) Design of supporting beam for shear & bm by an addition load factor
for EQ combination.
e) Detailing of junction with confining reinforcemnt.

With all the points together, floating columns must work as is proved
worldwide with highrise structures.

The engineers are much afraid about it because of mishaps in Ahmedabad where
the building collapsed might be because of no design for EQ consideration,
no space frame analysis, lack of quality control, no monitoring etc.

K. N. sheth

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