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These stacks are normally 3 to 10 inches in size as well as can be pierced to midsts upwards of 200 feet. For the most common sort of mini loading, a hollow steel or plastic shaft is either screwed or drilled into the ground. piling contractors Grout or concrete can after that be gathered to create the stack, with the dirt sustained throughout by the steel shaft. This implies that, unlike the conventional boring method, no additional assistances are required, also in weak soil. Screw stack installations have additionally extended to residential applications, with many home owners selecting a screw heap over other alternatives.