Abstract: A modular shelving system comprises a first upright, a second upright, first and second rails, and a rail spanner. The first upright includes a first body and a first cleat having a base portion secured in the first body. The second upright includes a second body and a second cleat having a base portion secured in the second body. Each of the first and second rails defines an upper cleat hole and a lower cleat hole. The first cleat of the first upright is slidably received in the upper and lower cleat holes of the first rail, and the second cleat of the second upright is slidably received in the upper and lower cleat holes of the second rail. The rail spanner extends between the first and second rails and includes first and second retaining claws each connected to the rail spanner.

Abstract: Assembly of a structurally sound modular shelving system includes forming an H-shaped base structure, or otherwise-shaped base structure, by releasably hooking a tie beam into a first base piece and a second base piece. A first column member is slid into the first base piece by sliding an insert tab at an end of an elongate body of the first column into a vertical passage through the first base piece. A second column member is similarly slid into a second base piece. A header member is releasably hooked into the first and second columns, the header member extending substantially horizontally between the first and second columns and substantially perpendicularly to the first and second base pieces.

Abstract: Assembly of a structurally sound modular shelving system includes forming an H-shaped base structure, or otherwise-shaped base structure, by releasably hooking a tie beam into a first base piece and a second base piece. A first column member is slid into the first base piece by sliding an insert tab at an end of an elongate body of the first column into a vertical passage through the first base piece. A second column member is similarly slid into a second base piece. A header member is releasably hooked into the first and second columns, the header member extending substantially horizontally between the first and second columns and substantially perpendicularly to the first and second base pieces.

Abstract: A rack mover, attachable to a rack, includes a wheeled jack for lifting the rack off the support surface and a jack-mounting assembly. The jack-mounting assembly includes a first member to which the jack is coupled and a second member including hooked projections extending a length through respective openings in the first member. The hooked projections are configured to engage the rack. A biasing member of the jack-mounting assembly biases the second member in a first direction relative to the first member such that the hooked projections extend a first length through the respective openings. A tightening assembly of the jack-mounting assembly is engaged with the second member and configured to move the second member relative to the first member in a direction substantially opposite the first direction to reduce the length of extension of the hooked projections through the respective openings to a second length less than the first length.