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Steel pipe stacks, which are most common, are easy to drive as well as can be used as permanent piles in smaller sizes and also as temporary caisson or sash for huge sizes. Steel heaps are favored as end-bearing stacks due to their capacity to be driven in deep strata because of little cross-sectional area, minimizing dirt resistance. One more View website element is their weldability to offer longer extensions when needed. By withdrawing the steel case, a bond area is created between the surrounding bedrock or dirt as well as the cementitious cement.