Roof Strength Test

Roof crush testing of one side of the vehicle one sided testing was performed from april 2001 through march 2008 on 75 passenger vehicles.

Roof strength test.

The main differences between the procedure specified by the insurance institute for. To earn a good rating the roof must withstand a force of 4 times the vehicle s weight. In the institute s roof strength test a metal plate is pushed against 1 side of a roof at a constant speed. In the test the strength of the roof is determined by pushing an angled metal plate down on one side of the roof at a slow but constant speed and measuring the force required to crush the roof.

This astm testing procedure utilizes a calibrated spray rack with specific water pressures nozzles and distances to wet a wall with water at the rate of five gallons per square foot per hour. The model years of the tested vehicles ranged from 1997. The force applied relative to the vehicle s weight is known as the strength to weight ratio.