Abstract: A truck is fitted with an unloading conveyor for carrying packages of material, e.g. roofing shingles, from a transfer station on the truck bed, preferably at its rear. This conveyor can swing in an arc about its mounting adjacent the transfer station, and its azimuth can be adjusted to reach a wide variety of delivery sites. The truck bed can carry multiple rows of stacked packages such as pallettized loads of roofing shingles, and is fitted with a bed conveyor system to move an entire row of loads to the transfer station. Upper flights of the bed conveyor move toward a lift platform designed to receive a few of the palletized loads as these are carried to the transfer station. An operator removes the packages from the loads and places them onto the discharge conveyor. As the loads are emptied, the lift platform can rise so the operator only shifts the packages onto the discharge conveyor with minimal lifting.