Abstract: Sleeping modules are disclosed which are of elongated box shape construction with open ends for access. The are about length and width of a single bed and of sufficient height for an occupant to sit upright. The modules assembled in stacks or columns of two or more modules supported one above the other in parallel relation in a supporting framework and arranged in rows together with bathrooms and other accommodations. The sleeping modules are assembled into portable building units which may be used for portable sleeping accommodations at parks, sporting events, and other locations where temporary or permanent inexpensive sleeping accommodations are desired. Additionally, the sleeping modules may be assembled into larger building units or other suitable accommodations to provide facilities for dormitories, barracks, or places of confinement such as correctional institutions.

Abstract: A vacuum forming mold for plastic sheet truck bed liners is shown which is adjustable for use in forming liners for a variety of sizes and makes of pick-up trucks. The mold is box shaped with a hollow wall construction for drawing a vacuum uniformly around the inner wall thereof. The interior wall of the mold has a width equal to the standard width of a pick-up truck bed of U.S. manufacture or alternatively to the standard width of the truck bed of a foreign-made, imported truck. The length of the mold is at least as long as the longest truck bed length of a U.S. made or a foreign-made truck, respectively. Removable mold parts of predetermined size, corresponding to the size and shape of the truck bed wheel wells are provided for attachment to the walls of the mold at a point corresponding to the location of the wheel wells in a particular make of truck.