Roof Crush Test

Rollover test and nass case analysis nhtsa june 1992.

Roof crush test.

Eleven midsize 4 door suv roof designs were subjected to a test similar to the one conducted by automakers to comply with federal roof strength requirements. Although their procedure is similar to that of fmvss 216 216a the requirement to earn the highest rating is 4 0 times the vehicle s curb weight. Every year approximately 10 000 americans are killed in rollover accidents accounting for about 30 of all light vehicle occupant fatalities. The force applied relative to the vehicle s weight is known as the strength to weight ratio.

Federal motor vehicle safety standards. 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. The number of occupant injuries is significantly higher. A test program like the very successful series produced by the iihs for offset frontal impacts would be more effective in the short run at least for improving roof strength.

Roof crush is the failure and displacement of an automobile roof into the passenger compartment during a rollover accident. Televise the results of drop tests or jordan tests or cris tests and let the public see the differences between those which only pass the federal 216 test and the best. The relationship between injury levels and intrusion or roof crush has. Supplemental notice of proposed rulemaking snprm.

If the vehicle being tested is a multipurpose passenger vehicle truck or bus that has a raised roof or altered roof and the initial contact point of the static loading device is on the raised roof or altered roof to the rear of the roof over the front seat area the plate is positioned so that the midpoint of the rearward edge of the lower surface of the static loading device is within 10 mm of the transverse vertical plane located at the rear of the roof over the front seat area. Researchers applied force to the roofs until crush reached 10 inches measuring the peak force required for 2 inches of crush 5 inches of crush and 10 inches. The insurance institute for highway safety has released results from its new crash test program. Roof crush resistance 222 13 kb final rule.