Interpretation ID: 3269yy
Preferred Custom Concepts, Inc.
4107 Kaufman County Road
P.O. Box 0069
Crandall, TX 75114
Dear Mr. Brito:
This responds to your letter asking about recent changes in this agency's safety standards as they apply to conversion vans. You stated that, "The recent changes that have occurred in the truck and van conversion industry regarding seats and seat belt restraints have also sparked rumors that this new law will also regulate the use of wood in the interior of a converted vehicle." You asked if in fact there is some new NHTSA regulation of "the use of wood in the interior of a converted vehicle." I am pleased to have this opportunity to explain our regulations to you.
The National Highway Traffic Safety Administration (NHTSA) is authorized under the National Traffic and Motor Vehicle Safety Act (15 U.S.C. 1381 et seq.; Safety Act) to issue safety standards applicable to new motor vehicles and items of motor vehicle equipment. NHTSA has exercised this authority to issue Standard No. 208, Occupant Crash Protection. As of September 1, 1991, Standard No. 208 requires, among other things, "dynamic testing" of manual lap/shoulder safety belts installed at front outboard seating positions of multipurpose passenger vehicles and trucks with a GVWR of 8,500 pounds or less. "Dynamic testing" means that, after fastening the safety belts around a test dummy, a test dummy occupying a seating position must comply with specified injury criteria in a 30 miles per hour barrier crash test. The specified injury criteria are the head injury criteria (HIC), chest acceleration and deflection, and femur loading. For your information, I have enclosed a copy of our November 23, 1987, final rule adopting the dynamic testing requirements for light trucks.
Nothing in the dynamic testing requirements of Standard No. 208 explicitly prohibits the installation of wood in the interior of conversion vans. Indeed, some 1992 luxury passenger cars, which are also subject to crash testing, have wood installed in the vehicle interior. However, wood is a relatively hard surface in a vehicle interior, especially when compared with the padded dashboard, steering wheel, seats, and other components the head may contact in a crash. It would be very difficult for a vehicle to satisfy the injury criteria during dynamic testing if wood were installed in an area contacted by the dummy head during the crash test. Thus, the dynamic testing requirements for conversion vans may effectively limit the interior areas where wood can safely be installed.
In addition, van converters are generally small entities that would not have the resources needed to independently certify that their conversion vans comply with the dynamic testing requirements. The simplest way for these van converters to certify compliance with the dynamic testing requirements is to convert the vans in accordance with the specifications provided by the original manufacturer of the van (e.g., Chrysler, Ford, or General Motors). Because of the difficulties in complying with the dynamic testing requirements if wood were installed in an area contacted by the dummy head during the crash test, the original manufacturers of vans may have advised converters in the van specifications not to add wood in the interior areas of the vans. You may wish to contact van converters or original manufacturers to learn if this is the case.
Another safety standard that might limit the interior areas where wood can be installed is Standard No. 201, Occupant Protection in Interior Impact. Standard No. 201 specifies performance requirements for certain areas of the vehicle interior compartment, including portions of the instrument panel. Again, while Standard No. 201 does not explicitly prohibit the use of wood, it may be difficult to comply with the requirements of this standard if wood is added to areas subject to Standard No. 201's performance requirements. I have enclosed a current copy of Standard No. 201 for your information.
I hope this information is helpful. If you have any more questions about this issue, feel free to contact Mary Versailles at this address or by telephone at (202) 366-2992.
Sincerely,
Paul Jackson Rice Chief Counsel
Enclosures
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