Vehicular body structural arrangements

A vehicle, comprising:

• a frame rail;
• a hat-shaped crossbeam resting atop the frame rail, the crossbeam including a base engaged with the frame rail, upturned sides extending from the base, and outturned rests respectively extending from the sides;
• a polymeric deck panel resting atop the crossbeam on the rests, the deck panel including an aperture and a bordering area around the aperture;
• an adaptor resting inside the crossbeam on the base, the adaptor including a footing engaged with the base, and a riser projecting from the footing between the sides, the riser rising through the aperture and overtop the bordering area, and including a shoulder underhanging the bordering area;
• and
• a fastener securing the adaptor to the frame rail against the crossbeam, the fastener including a head atop the adaptor, and a threaded shank extending to the frame rail through the adaptor and the crossbeam, the head overhanging the bordering area and engaged with the riser overtop the bordering area, and the threaded shank threaded with the frame rail, the fastener thereby securing the adaptor to the frame rail against the crossbeam without tightening against the deck panel at the bordering area.

A vehicle, comprising:

• a metallic frame rail;
• a metallic hat-shaped crossbeam resting atop the frame rail, the crossbeam including a base engaged with the frame rail, upturned sides extending from the base, and outturned rests respectively extending from the sides, the sides each including an outward cant and an upward rise;
• a unitarily-formed polymeric bed box resting atop the crossbeam on the rests, the bed box including a deck panel, side panels and a bulkhead panel, the deck panel including a crosswise corrugation engaged with the rests, the corrugation including a swell between the rests, where the deck panel includes an aperture and a bordering area around the aperture, the bordering area including a downturned edge flange coinciding with the aperture;
• a metallic adaptor having a casted construction resting inside the crossbeam on the base, the adaptor including a footing engaged with the base and the sides, and a riser projecting from the footing between the sides, the footing including a baseplate engaged with the base and upturned side lips engaged with the outward cant, the riser including a tube rising through the aperture with a gap between the tube and the bordering area whose rim is overtop the bordering area, and circumferentially-spaced fins projecting from the tube whose ends form shoulders underhanging the edge flange with gaps between the shoulders and the edge flange;
• and
• a metallic fastener securing the adaptor to the frame rail against the crossbeam, the fastener including a head atop the adaptor inside the swell, and a threaded shank extending to the frame rail through the adaptor and the crossbeam, the head overhanging the bordering area and engaged with the rim overtop the bordering area with a gap between the head and the bordering area, and the threaded shank threaded with the frame rail, the fastener thereby securing the adaptor to the frame rail against the crossbeam without tightening against the deck panel at the bordering area.