I recently had an opportunity to try out the Hitachi NC65AC Concrete Nailer (Hitachi Power Tools, 3950 Steve Reynolds Blvd., Norcross, GA 30093; 800/546-1666; www.hitachi.com). The tool arrived at an opportune time, because we had just gotten underway with a condominium project in Keystone, Colo., that was designed to be a two-story wood building set atop an underground concrete parking structure. The job presented a myriad of wood-to-concrete connections. I used the NC65AC for rough structural connections, such as fastening 13/4-inch LVL balcony ledgers to precast concrete retaining walls, and 2-by mud sills to concrete slabs. I also used the tool for exposed connections where I had to secure cedar stair stringers to concrete walls. Reciprocating Piston Delivers Multiple Blows The Hitachi uses
