The third video from the “Inside IIHS” series has been released, with the Insurance Institute for Highway Safety giving us a look at how it determines the roof strength of vehicles.
In the latest video, IIHS details the crush machine used to determine a vehicle’s roof strength while reviewing the importance of strong roofs in rollover crashes.
To measure the roof strength of a vehicle, IIHS has a metal plate pushed against one corner of a vehicle’s roof at a constant speed. The maximum force sustained by the roof before five inches of crush is compared to the vehicle’s weight. From there, IIHS calculates a strength-to-weight ratio.
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