1.what is tension zone of columns. 2.what is lift pith depth for heigh rise building. 3.how to do pile work at building construction, tell the steps. Ans. 1.from floor to800mm height makes lapping zone not to floor& slab joint position called tension zone of column. 2.Lift pith depth is 1300mm to 1500mm. 3. a.survey ,select road crown levels & fixing pile cap top lvl as boundy marking area. b.point out and fixing pile points. c.fixing center line of each pile and driven beller &do pile .Do with trema pipes joints &make wash boring determine 1.1 hydrometer bentonite boring water density test . d pouring concrete withDMC pipes joints.

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Tension zone of columns is the area above the floor level where lapping of reinforcement is not allowed. Lift pit depth for high rise buildings is typically between 1300mm to 1500mm. Pile work at building construction involves surveying, selecting road crown levels, fixing pile cap top level, pointing out and fixing pile points, fixing center line of each pile, driving beller, using tremie pipes for concrete pouring, and conducting tests for water density.

Tension zone of columns is the area above the floor level where lapping of reinforcement is not allowed.
Lift pit depth for high rise buildings is typically between 1300mm to 1500mm.
Steps for pile work at building construction include surveying, selecting road crown levels, fixing pile cap top level, pointing out and fixing pile points, fixing center line of each pile, driving beller, using tremie pipes for concrete pouring, and conducting tests for water density.

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