RESNA WC20 Wheelchair Seating Systems for Use in Motor Vehicles is a voluntary industry standard that establishes design and performance requirements and related test methods to evaluate wheelchair seating systems relative to their use as seats in motor vehicles independent of their installation on production wheelchair frames. It accomplishes this by installing and testing the seating system on a surrogate wheelchair frame (SWCF) shown here that has been designed and validated to perform during a simulated 48 kph (30 mph) frontal crash in a manner that is representative of typical production wheelchair frames. An anthropomorphic test device (ATD), or crash-test dummy, representing the wheelchair occupant, produces nominally worst-case dynamic loading conditions on the seating system when tested with a SWCF-anchored pelvic restraint belt as is required by WC20. The SWCF on which the seating system is installed can accommodate a wide range of types and sizes of production seating systems (see detailed engineering drawings for the SWCF here).
The international standard for seating systems, ISO 16840-4 (2009), also uses the same SWCF. However, seating systems can be tested using either surrogate or commercial 4-point strap-type securement systems, and may be tested with an integrated SWCF-anchored pelvic belt or an independent vehicle-anchored pelvic belt. Seating systems imported from other countries may be compliant with this standard instead of, or as well as, WC20.
WC20 and ISO 16840-4 are intended for 'complete' seating systems, which consists of a seat, back support and associated attachment hardware. The seating system may, or may not include postural support devices. Components that constitute a complete seating system are detailed in the table below when the information is provided.
More information on WC20 and ISO 16840-4 is located within the standards section of this website.
The following tables are lists of seating products available that manufacturers have reported as being:
NO PRODUCTS TO LIST AT THIS TIME
Use the links to the manufacturer websites to learn more about the listed seating products or to contact the person accountable for implementing the WC20 standard.
Note: Claims of product compliance are as reported by manufacturers and cannot always be confirmed by UMTRI personnel as these are voluntary industry standards.