Simplified metallic structures and procedure for their production

A shelf structure assembly comprising at least two vertical and at least one horizontal shelf, said vertical supports and said shelf being made of like modular members, said modular members having longitudinal dovetail projections, fixing means for anchoring said shelf to said vertical supports, said vertical supports and said shelf when assembled forming two right angle corners, said fixing means consisting of right angle components located in the corners between said vertical supports and said shelf, said right angle components having two arms, one arm supporting said shelf and the other arm adhering to each of the vertical supports when the shelf structure is assembled, each of said arms having cavities, a slot passing through each arm and into each cavity permitting each cavity to be elastically deformed, the cavities in one arm being perpendicular to the cavities in the other arm, each of said dovetail longitudinal projections having ends, said ends being anchored in said cavities when the shelf structure is assembled, said right angle components having longitudinal through-holes along the longest dimension thereof, tie rods being inserted in said through-holes when the shelf structure is assembled, whereby said right angle components are tightened around said projections as each cavity is deformed about each of said projections.