The floor framework is constructed of a perimeter 2" x 2" x 11-gauge perimeter angle. This perimeter boxes all four edges of the floor and is welded at the end of each cross-member. The wheel well section is 14-gauge steel flat plate.

A 1" x 4 1/2" x 1" x 14-gauge steel channel is inverted and runs the full length of the floor approximately 29" in from both the driver side and passenger side.

A 1" x 2" x 1" x 14-gauge steel channel is inverted and runs the full length of the floor to support the passenger aisle. This channel is also welded longitudinally between each frame rail, where necessary, to give added support to the flooring material. Additional steel plate may be added for vehicles requiring floor supported hardware in use for options.

The entrance door step pan assembly consists of an 11-gauge steel step pan treads and risers with steel front and rear 14-gauge side jamb panels braced with 3/4" x 3/4" x 16-gauge steel tubing and a steel door header plate.

The steel floor framework is overlaid with Coosa BW20 3/4" Composite Panel flooring (high density, closed-cell polyurethane foam reinforced panel with woven roving and continuous strand fiberglass). The panel is cut to width in order to reduce seams and tongue and groove routed prior to installation. The panel is attached to the floor structure with a ¼" bead of industrial adhesive applied to the surface of all steel structures. Additionally, bugle head screws are placed at a minimum of every 12" along all edges and within the floor decking. The composite panel joint is sealed using floor filler compound and sanded.

At the end of the construction process when all components have been attached to the underside of the floor, the perimeter joints and all other joints are sealed with expanding-type foam resin sealant prior to undercoating.