Cantilever rack with truss uprights

Claim 1

A cantilever rack comprising a base, a plurality of upright columns supported by said base in spaced side-by-side intervals, means securing said columns to said base, said columns each having a truss construction consisting of a pair of opposed individual uninterrupted channels interconnected by alternating horizontal and diagonal truss members, the lower ends of alternate diagonal truss members of each column being secured to the same channel of that column and the lower ends of the other diagonal truss members being secured to the other channel of said column, said channels each having a pair of parallel legs joined by a web, said channels of each pair being inclined toward each other to form an upwardly tapered column having a base wider than the top when viewed from the side, connecting rods secured to corresponding horizontal truss members of adjacent columns for preventing relative lateral movement of said columns, diagonal tension rods joining said connecting rods, a load-supporting arm secured to and vertically positionable on one side channel of each column, said load-supporting arm having a bracket shaped to conform closely to the outer surface of one of said column channels and an arm members extending outwardly from said bracket, said bracket having axially aligned appertures, said channel legs upon which said arm is positionable each having aligned vertically spaced appertures, and a pin for insertion through said bracket appertures and selected channel appertures to selectively position said arm at a predetermined elevation on said column with said bracket closely engaging said channel.