Abstract: The present invention presents novel features for providing a lightweight, structurally rigid collection body comprising a loading assembly for dumping refuse into an elevated hopper; a reception area for refuse dumped into the hopper; a storage area for storage and compaction of refuse; a packer assembly for compression of the refuse within the storage area; a tailgate providing access to the storage area; a latching mechanism for the tailgate; and an actuation system comprised of hydraulic and electrical components for controlling the operation thereof. The collection body is self-contained and sufficiently rigid for mounting on the chassis of a vehicle without major vehicle modifications. Its walls are constructed of an inner wall, an outer wall, an upper frame member and a lower triangular member, forming a light weight, composite sidewall structure which resists bending and buckling. The inner wall may be easily replaced when damaged without replacement of the outer wall.