Abstract: A cart for carrying at least one removable bin or shelf includes molded base and top panels each having a plurality of clamping members, and a pair of support rail assemblies extending between and connecting the top panel and the base panel. The support rail assemblies are in spaced, parallel relation to one another and include a pair of parallel support posts and a plurality of parallel rails extending between and connecting the support posts. The rails are mounted to the support posts perpendicular thereto. The support posts are received in and secured to the base and top panels at the clamping members. The rails are configured for slidingly receiving and supporting the shelf or bin thereon. The cart includes a plurality of casters mounted to the base panel for mobility of the cart.

Abstract: Disclosed is a foldable, injection molded plastic chair in which the seat of the chair is engageable in a generally horizontal seating position with application of little force, with the seat engagement members preventing the seat from moving out of its horizontal seating position until application of significantly greater force thereto, thereby providing a chair having improved load withstanding capability. The seat is mounted for pivotal engagement to the legs of the chair by an improved keyed post interlock arrangement which can withstand heavy loading and still retain the pivotal engagement of the seat with the chair legs.

Abstract: Disclosed is a ridge fitting for rapidly and securely connecting adjacent roof panels of a modular building together at an angle to one another. The ridge fitting comprises a thin wall having panel receiving channels on opposite sides thereof. The section of thin wall between opposite channels is formed of a suitable light transmitting polymer such that the thin wall serves as a sunroof, allowing sunlight to pass therethrough to provide illumination of the interior of the building. The material selected for the thin wall of the ridge fitting also provides flexibility to allow the angle between the adjacent roof panels to be varied to suit the specific requirements of a particular application.