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The mini stacks are best for lessening structure settlement and are perfect when is being performed in the locations where soil makeup is quite challenging. When the wanted depth has been reached, the steel casings placement is locked, stopping Click here! it from proceeding even more. Last hammer blows are put on the dry concrete mix which better condenses the soil as well as creates the mix to leave the steel housing. In doing so, the completely dry concrete mix develops a light bulb like form at the base of the heap. This bulb form will later give the Franki stack remarkable uplift ability when its finished. To achieve the desired capability, the hammer rig continuously influences the top of the stack.