Support structure

A support structure comprising a cross-beam and leg assemblies, wherein the cross-beam is reduced in its end portions in the shape of trapeziums that wedgingly engage Vee-shaped crotches that are defined in the upper portions of the leg assemblies, said wedging engagement leaving spaces between the undersides of the trapeziums and the bottoms of the Vee crotches in the leg assemblies, holes in said cross-beam end portions and said upper portions of said leg assemblies, and U-bolts having an angle of entry through said holes that bears an oblique relationship to one inclined face of each trapezium and a 90.degree. relationship to the opposite inclined face of each trapezium, and wherein wing nuts engage the protruding ends of each U-bolt adjacent to the inclined trapezium face that bears said 90.degree. relationship, wherein all the components are locked into a rigid assembly.