The rail skirt system includes a top rail, a skirt that hangs from the top rail, formed from rail bar members connected together at their inner ends by a middle connector tube connectable to a locking support leg, to provide support for the top rail on a side of a shelter. The outer ends of the rail bar members are connected to legs of the shelter by fixed corner connecting brackets.

A connection device for a frame, the connection device comprising a body comprising: a first engagement member (1) and a second engagement member (2). Said body comprises a sealing flange (13) which is configured to extend in parallel alignment with a first flange (7) of a first beam (4) and with a second flange of a second beam when the first and second beams are connected to the connection device via the first and second engagement members (1, 2) respectively, and which sealing flange (13) comprises a first recess (14) configured for receiving the first flange (7) of the of first beam (4) when the first beam (4) is connected to the connection device via the first engagement member (1), and a second recess (15) configured for receiving the second flange of the second beam when the second beam is connected to the connection device via the second engagement member (2).

A rack construction assembly for building a storage rack includes a plurality of bracket units. Each of the bracket units has a plurality of channels therein to insertably receive dimensional lumber. Thus, the dimensional lumber is arranged to form a rack for storing objects. Each of the channels corresponding to each of the bracket units is oriented at right angles with respect to each other. Thus, the dimensional lumber corresponding to each of the channels defines an X axis, a Y axis and a Z axis of the rack.

A hub for interconnecting a plurality struts at a node of geodesic framework features a receiver and a holding mechanism. The receiver has a plurality of receptacles to each receive an end of a respective strut. The holding mechanism is movable between a full-hold position and different partial-hold positions. The full-hold position at least partially obstructs each of the receptacles to block withdrawal of any strut ends already received in the receptacles. Each partial-hold position reveals one of the receptacles to enable insertion or withdrawal of a strut end, while continuing to obstruct all of the other receptacles to prevent inadvertent separation of any previously installed strut. Struts are inserted one-by-one as the holding mechanism is indexed from one partial-hold position to the next, without worry of any preceding strut separating from the hub. A kit with a spacer enables fastening of two hubs together in a multi-layer geodesic framework.

A rack construction assembly for building a storage rack includes a plurality of bracket units. Each of the bracket units has a plurality of channels therein to insertably receive dimensional lumber. Thus, the dimensional lumber is arranged to form a rack for storing objects. Each of the channels corresponding to each of the bracket units is oriented at right angles with respect to each other. Thus, the dimensional lumber corresponding to each of the channels defines an X axis, a Y axis and a Z axis of the rack.