NMSB XII-B (bolt down)   The NMSB XII-B is an engineer-rated, bolt-down crash-beam designed to stop a 10,000-pound vehicle traveling at 18 mph. It works as a stand-alone system for facilities not requiring K-rated barriers. The NMSB II-B crash beam is ideal for traffic control locations such as parking garages, parking lots, rental car facilities and short/long term airport parking facilities. Two power options are available:   • Integrated electric power unit (EPU)   • Remote electro-hydraulic power unit (HPU)   Support Files: General Specs