Document revision history a history of revisions to this document is provided in appendix b.
Iihs roof strength test.
Roof strength test overview.
The insurance institute for highway safety iihs is.
The roof strength rating is based on a test in which a metal plate is pushed against one side of the vehicle s roof at a slow constant speed.
The force applied relative to the vehicle s weight is known as the strength to weight ratio.
The iihs roof strength crash test is conducted by pushing a metal plate at constant speed against one side of a vehicle s roof.
Roof strength test protocol version iii supporting documents for the insurance institute for highway safety iihs roof strength program are available from the technical protocols section of the iihs website.
In order to earn a good rating a vehicle s roof must withstand a.