A New Orleans contractor tried and failed four times to drive sheet piles through a dense soil layer with progressively larger vibratory hammers and an impact hammer. The fifth attempt is succeeding, thanks to the right tool: a hydraulic press that slides the steel in with great force, rather than banging it down. + Image Photo: Giken Seisakusho Co., Ltd, Tokyo Workers use hydraulic-reaction press to drive steel sheet piles into difficult ground. Related Links: Sheet Driver Tackles Tough Project In late 2005, as part of emergency repairs after Hurricane Katrina, the U.S. Army Corps of Engineers let a contract
The market is generally healthy and steadily growing, and margins are up for large specialty contractors. Further, advances in design tools and owner demand for collaboration are giving subcontractors a seat at the table early on in projects.