I won't be able to get exact measurements till this afternnon but it was built to fit in a full size short bed truck. As far as atv area, I built it to easily fit my yfz 450 with + 4 front end and my wifes 400ex.
For sale: Custom built atv truck bed rack. Fits full size short bed truck, holds 2 atv's, side loader, black powdercoat, never used, needs ramps. $500.00 O.B.O