Ramp based modifications are most commonly performed on minivans. In order to provide access for the wheelchair user, the floor on
side-entry vehicles is lowered 10-11".
In rear-entry conversion, the floor is not lowered but rather removed, and a steel tub is inserted measuring approximately 32" x 98" or 32" x 45" deep.
Ramps come in two styles: fold-up or in-floor, and two operating modes - manual or motorized. Fold-up ramps fold in half and stow upright next to the side passenger door in a side-entry conversion. In a rear-entry conversion the ramp is stowed against the rear access door.
Fold-up ramps present a slightly raised ramp angle than in-floor ramps. In a side-entry conversion, only the drivers side entrance is accessible. In-floor ramps slide into a pocket underneath the vehicle's floor, and are only available for side-entry conversions.
Folding ramps are available in manual or motorized versions for both conversion types. Power applications may also have a "kneeling feature" that reduces the angle of the ramp by compressing the suspension of the van on the ramp side.