A system wall or system ceiling comprising a number of supporting girders suspended from the structure of the building and to which slabs are mounted substantially extending perpendicular to the girders, the girders being provided with outwardly or downwardly protruding clamping feet engaging one or more slits, cut into the upper or back side of the slabs.
A floor, ceiling or wall covering constituted of a number of successive panels and fixing means for the panels, the fixing means including holders which, by means of fixing parts, retain the panels in a disconnectable manner over a part of the thickness of the panels.
