Wall element to building component fire-protective fixture - with springs additionally mutually bracing frame parts unstressed when tube is extended

At the end of the wall element, fitted with a fixture device for joining the adjacent building components, at least one end face incorporates an extensible tube with variable internal pressure, set between two telescopically, mutually adjustable U-shaped frame components. The two frame components are additionally braced against each other by spring elements at least in the two and sections, and these elements are unstressed when the tube is fully extended or are held only under slight pre-stressing and have a resilient effect in the plane of the wall. The spring elements may be sinusoidally bent wire springs in the wall plane, supported in lengthways grooves on the inside of the tubes walling. If the tube loses its sealing effect or is burnt in fire, the frame components do not collapse and the wall does not fall down.