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WC20 Information
Both pelvic belt and shoulder belt restraints that comply with RESNA WC-4:2012,
Section 18 and/or 4.6, 5.2, 5.3 or RESNA WC-4:2012, Section 19 should be used to
limit occupant movement in a crash and reduce the likelihood of occupant ejection
from the vehicle and/or injurious contact of the occupant with the vehicle interior.
The pelvic belt should be angled between 30° to 75° horizontally when viewed
from the side, and ideally between 45° to 75° horizontally, as shown in the figure
below.
WARNING
Back supports with adjustable recline angles
should not be tilted back more than 30° to the vertical
during travel in vehicles unless necessary for
the medical and postural needs of the occupant.
WARNING
If the back support must be adjusted to an angle greater
than 30° to the vertical during travel, the upper shoulder
belt anchor point should be adjusted rearward to maintain
belt contact with the occupant's shoulder and chest.
