Abstract: An edge reinforcement for a sandwich-type building panel comprises a sheet-metal reinforcing member which extends along the edge of the panel between the two outer plates thereof and is of laterally open box shape. This reinforcement member is formed with a groove adapted to receive a spline that connects together the two like panels. In addition, the reinforcement member is formed on a section extending transverse to the two plates with a plurality of holes so that synthetic resin may be injected through this reinforcement member into the space between the two plates which are separated and held apart by the reinforcement member. The member may comprise a pair of like profiles each lying against a respective outer plate and in turn embracing a single sound-deadening inner plate formed with a plurality of foam-passing holes.

Abstract: A building panel comprising a pair of parallel skins of fireproof and ruptureproof synthetic-resin material sandwiching a foamed synthetic-resin mass is provided at least along its lower edge with a gas-porous body between the skins which defines an empty cavity running the full length of the mass between the skins. A rigid edge stiffener between the skins underneath the mass and the body is formed with throughgoing holes allowing gas under pressure between the skins to escape to the exterior. The edge stiffeners are formed with vertically open bores and the panels so formed are mounted in place by means of rods which are slipped through synthetic-resin tubes imbedded in the slabs above and below the panel. Thus a panel is tipped into place, pivoting upon hinged upper ends of the rods projecting from below, and when in place further rods are dropped down from above into the holes in the upper edge stiffener so as to secure the panel tightly in place.