Trench work is inherently dangerous, and trench boxes used in trench and excavation projects help keep workers safe and protected from cave-ins. Eight tips from United Rentals enhance trench box ...

The Anchorage Water and Wastewater Utility let a $7-million contract last year to install 4,200 linear feet of high-capacity 48-inch-diameter steel spiral water main pipe, in 40-foot joint lengths.