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Multi-Barrier MB 350 WHAT IS A BARRIER? By definition, a barrier is designed to provide positive protection, containing and redirecting an impacting vehicle. In order to be designated a barrier and be certified for use on a job site, a device must pass NCHRP-350 crash test requirements and the manufacturer must be issued a federal acceptance letter federal acceptance letter (and be able to produce it on request). Barriers are required to prevent an impacting vehicle from penetrating the barrier line at test level speeds, and at the TL3 level, our MB350 had a deflection of just 11 feet. SOTW MB-350 42"H x72"L x24"W 125 lbs. empty, 1666 lbs. full .31" thick polyethylene wall Spec sheet .pdf Spec sheet .doc REQUIREMENTS To be used as a barrier, the MB350 must be used with the steel bar kit. The kit provides additional strength and keeps vehicles from penetrating the barrier line. Download kit installation instructions (.pdf) The minimum length of need (LON) for NCHRP-350 compliance is 33 interconnected barriers, or 198.5 ft. Each barrier must be ballasted to capacity with an approximate weight of 1666 lbs. ACCESSORIES The MB350 can also be used in situations where barriers are not required, such as surrounding job sites where traffic is not a consideration. The MB350 may be sold with a corner connector that allows setup to form a corner to form a rectangular perimeter. It can also be used with fence panels, which can be fitted with chain link fence to surround job sites and reduce passerby visibility. However, the fence is not NCHRP-350 compliant for use on roadway construction. Our portable water barrier makes many jobs safer and easier to manage. Pictured without steel bar kit. The MB350 is not certified as a barrier when used without the kit.