New product announcements: 01/14/2009 Framing Nailer: Paper-tape Nails Load Quickly The Model DF250S 20° Framing Nailer is a pneumatic nailer that can be loaded with up to 70 paper-tape nails at a time. The tool’s nail lock-out feature is designed to prevent dry firing, and according to the manufacturer, it is able to drive 16D nails flush into laminated veneer lumber without the need for additional hammering. The nailer weighs only 8.1 lb, can accept a nails from 2-in. to 3 ½-in. in smooth, ring or screw shank, and is designed to work with Duo-Fast paper-tape nail strips. Duo-Fast Construction;
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.