Nhtsa Roof Crush Standards

Roof crush resistance 222 13 kb final rule.

Nhtsa roof crush standards.

216 roof crush resistance. Upgrades federal motor vehicle safety standard fmvss no. Nhtsa roof crush standard. The ability of a vehicle s roof to resist being crushed is closely correlated to the risk of injuries and fatalities in vehicle rollovers which currently account for more than 10 000 deaths each year in the united states.

The rules are an effort to reduce fatalities and serious. It was until in 1971 the nhtsa tackled the roof crushes rollover accidents. As of 2009 under the new standard the car roof must withstand three times the curb weight of the car without the 5 000 pound maximum limit. New standard nhtsa s proposed overhaul of its standard for roof crush resistance will require increased roof strength for most vehicles.

On the other hand since the targa roof which begins at the b pillar position and continues by means of the rear glass window to the rear body deck is a fixed rigid structural member that provides the targa with a roof from that point to the rear which roof meets regulatory roof crush standards where the entire roof is non structural. Supplemental notice of proposed rulemaking snprm. This notice is a request for comments to assist nhtsa in upgrading the requirements of federal motor vehicle safety standard no. Previous car roof crush standards lacking previous standards specified that car roofs had to withstand one and a half times a car s curb weight which could not exceed 5 000 pounds.

For now nhtsa s roof crush standard remains at three times the vehicle s weight an improvement over the previous standard but not as stringent as that suggested by iihs. Federal motor vehicle safety standards. The manufacturers knew how to produce a safer roof car but they maintained the law did not require it. So many fatal accidents happened and the nhtsa finally approved strict roof crush standards that took effect in 2012.

The independent nonprofit insurance institute for highway safety released a study that describes the inadequacy of the latest roof crush standards proposed by the national highway traffic safety administration. It asks the public for its views and comments on what changes if any are needed to the roof crush resistance standard. 49 cfr parts 571 and 585216 as part of a comprehensive plan for reducing the risk of rollover crashes and the risk of death and serious injury in those crashes this final rule upgrades the agency s safety standard on roof crush resistance in several ways.