It’s been about 10 years since earthmoving contractors began playing around in earnest with three-dimensional grade controls guided by global-positioning systems, which can speed up estimating and shaping earthwork by 30% or more. A new book explains the ins and outs of how to set up a grade-control network on the jobsite. Researched, written and published by the staff of Memphis-based TrenchSafety and Supply Inc., the book explains how grade controls, such as lasers and GPS, can displace traditional staking costs on a large-scale contract, which can run up $100,000 or more in surveying fees. “You can also see significant
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.