An embodiment of the present disclosure provides a delivery vehicle having a driver compartment and a cargo compartment. The cargo compartment is located adjacent the driver compartment. An at least one riser extends along at least a portion of the cargo compartment. The at least one riser includes a plurality of holes disposed therein. Each of the plurality of holes disposed in the at least one riser are spaced apart from each other a predetermined distance. A flooring assembly is located in the cargo compartment and supported by the at least one riser. The flooring assembly includes: at least a plurality of floor planks; each floor plank of the at least the plurality of floor planks has a longitudinal extent, a width transverse to the longitudinal extent, a longitudinally extending tongue located at a first end of the width, and a longitudinally extending groove located at a second end of the width opposite the first end of the width; wherein the each floor plank of the at least the plurality of floor planks is fastened to one of the plurality of holes disposed in the at least one riser.