Abstract: A device for laterally interconnecting structural members such as beams and columns. The device comprises a plate with a face and a circumscribing edge, at least one slot extending inwardly from the edge and at least one stud extending outwardly from the face of the plate means. Two such plates, one inverted, fixed to a pair of structural members, are interconnected by passing them contiguously and in parallel to have the stud of one plate enter the slot of the other plate. Preferably there are two parallel slots and two studs in the plate means, the closed ends of the slots and the studs forming a rectangle. In an I-column the upper portion of the flange may be used as one plate and below the upper portion of the column the plate may take the form of a bracket.