Said apparatus can also comprise dismountable parallel bars (9) that extend from one side support (2) to another and are secured to anchoring means (10).

It is however possible to attach one end of the rail to the wall and leave the other end freestanding on a side support.

This pulls the overlapping portions back in order to form a high pressure end-to-end abutment between the barriers.

At temperatures below the melting point of the eutectic spacer (170), the outer ring (150) is held in threaded engagement with the casing (130), and holds the closure plate (120) in position in abutment with the casing (130).

The retaining elements (4, 5) which remain in the resting position thereof and which are adjacent to the retaining elements (4, 5) that are bent outward form the lateral support for the object (2) placed inside the inventive stand.

The invention concerns an improvement to a non-tilt means acting on the follower and support plate (20) for which a lateral support is in friction sliding support contact with an axle bar (9).

For the beam design with RF-/STEEL EC3, a lateral and torsional restraint at the member ends and a lateral support of the upper chord is applied at one-third division points.

The invention is characterised in that at least some of the side wall elements (32, 32') are shaped so as to possess sufficient rigidity for carrying the applied loads without lateral support on an embankment covering the structure.