Patent ID: 7478509

Claim:
In combination with a pair of double-T profiles each having a flat central member centered on an upright axis and upper and lower end flanges each having outer edges formed with respective downwardly and upwardly projecting lips forming with the central member respective downwardly and upwardly open seat grooves, a connector formed unitarily with: a central body fittable between the profiles and a pair of opposite wings projecting from the body, engageable with respective faces of the respective central members of the profiles, and each having an upwardly projecting edge fitting into the respective downwardly open seat groove and defining an upwardly open slot into which fits the respective downwardly projecting lip and a downwardly projecting edge fitting into the respective upwardly open seat groove and defining a downwardly open slot into which fits the respective upwardly projecting lip, the upwardly projecting lips bearing directly on floors of the respective downwardly open seat grooves and the downwardly projecting lips being spaced upward from floors of the respective upwardly open seat grooves, the upwardly open slots having floors spaced downward from the respective downwardly projecting lips, the downwardly open slots having floors each formed with a straight central portion bearing directly on the respective upwardly projecting lip and rounded end portions out of contact with the respective upwardly projecting lip such that the connector bears directly downward on each of the profiles at a location that is spaced differently from a location at which it bears upwardly on the respective profile, the slots and edges extending a full length of the body.