Fred T. Hodgson · Frederick J. Drake and Co. · leaf 468
was introduced, whichconsisted in dropping a cone-shaped five ton weight a num-ber of times from a consider-able height, in order to forma hole, which was afterwardfilled with concrete. Thismethod never passed the ex-perimental stage. Coming tomore successful systems wemay mention a method… … HOW TO USE THEM 465 corded. Gilbreth used a molded corrugated taper pile,east with core hole the entire length of the pile, which isjetted down by a water jet and finally settled by hammerblows. Features which recommended the Gilbreth piles arethe opportunities for complete inspection before…
