Patent ID: 8424691

Claim:
A seismically hardened two-post mounting rack comprising: (a) a frame bottom; (b) a frame top; (c) a pair of frame uprights interconnected between the frame bottom and the frame top, each frame upright being formed from an inner channel member mounted to an outer channel member, which, together, define a closed cross-sectional shape, wherein: (i) each of the inner and outer channel member has a generally U-shaped cross section; (ii) the inner channel member has wings extending outwardly at either side of the U-shape of the inner channel member at an angle that is generally perpendicular to opposing sides of the U-shape; and (iii) the wings are mounted to an interior base of the U-shape of the outer channel member to define the closed cross-sectional shape; (iv) wherein the inner channel member is affixed to the outer channel member along substantially the entire vertical extent thereof, including at least a bottommost portion of the outer channel member; and (d) a base assembly, for supporting the frame bottom on a surface, including two separate end gusset members, each of which includes at least one vertically-oriented riser plate that is attached to at least one of the inner channel member and the outer channel member of a respective one of the frame uprights at a location, along a respective one of the frame uprights, where the wings of the inner channel member are mounted to the interior base of the U-shape of the outer channel member to define the closed cross-sectional shape, thereby imparting additional strength to the connections between the frame bottom and the frame uprights.