Abstract: A modular greenhouse enclosure is formed by mounting on a conventional shelf storage unit having spaced shelves supported on upright posts a rigid frame on which an impervious transparent cover is supported. The cover overlies and extends past the side edges of the shelves to define the enclosure. A vertical gap opening in the cover gives access to the shelves within the enclosure, and this opening can selectively be closed. The frame can be modular, formed from a plurality of posts and connectors, generally with three posts secured to each connector held angled relative to one another. Some of these frame posts can be connected to the shelf unit to hold the frame overlying the shelf unit. Several storage units can be positioned proximate one another for increasing shelf capacity, with a single frame and cover overlying all units.

Abstract: This collapsible sawhorse is comprised of two substantially identical side panels, a utility tray and links, and a top rail. The side panels, oriented back-to-back, are hinged together near their tops by laterally spaced mutually complementary structures thereon. The top rail fits with limited clearances over the hinging structures for maintaining them together and for distributing top rail loads to the underlying side panels. Loops underlying the top rail are snapped over hidden detent pins on the side panels for holding the top rail and side panels together. The utility tray is hinged to one side panel, and is aligned therewith with the sawhorse closed, and is extended transversely to both side panels and overlies the other side panel with the sawhorse opened; and the links connect the tray midpoint to the other side panel to limit side panel separation of the opened sawhorse.