Abstract: The beam has end terminals which can be connected to one another, such that one of the terminals is provided with front projections for guiding in vertical displacement of the other terminal, which has guides with a form which mates with the said projections, one of the terminals also having projecting lower arms to support the other terminal after it has been put into position, thus determining a single area of contact in order to permit disconnection of the supported terminal during dismantling, by turning on the said area of contact.
Abstract: A clamp including two mutually opposed substantially L-shaped members pivotably connected to an intermediate holder supporting the side profile sections of the panel frames to be secured, wherein the two L-shaped members are pivotably interconnected via a central shaft extending through the intermediate holder and said L-shaped members are further pivotably connected to said intermediate holder via two further transverse shafts extending through respective mounting apertures in the intermediate holder.