US Patent 8672296 Apparatus for lifting pallet racks

A lifting device for warehouse shelving supported by closely spaced vertical members is provided. The device employs a pivotable bracket which engages the vertical member at a central position with a pin to allow the bracket to rotate to move the top of the bracket away from the vertical member and position the member in a gap in the bracket. In the rotated position the bracket is engageable to a plate whereupon the bracket is pivoted back parallel with the vertical member and engaged with a second pin. A jack lifts the plate thereafter to thereby lift the member and the shelf.