Abstract: A rail (1) of U-shaped section is used as a casing for a bar of wood. The rail has barbs on the inner walls and ribs (4, 3) at the bottom. Tracks extend on the underside of the rail, the said tracks matching tracks on the mountings (2). The rail also has a horizontal support shelf on its outer side. The rail with bars of wood are secured with the aid of the mountings on an underfloor damaged by moisture whereas a material serving to isolate the underfloor is located on the shelves. The said material rests on two support shelves (5) pertaining to the rails and situated at some distance from one another. It is also possible for an insulating material to be placed on top of the isolating material (12, 14). A new flooring material is now fixed on top of the bars. At this stage the space between the underfloor and the isolating material brought about in this way is ventilated naturally or by force. The same method can be used to prevent radon rising through the underfloor from penetrating the premises above.

Abstract: The invention helps to find a way for creating a ventilated space on an existing floor damaged by moisture. On this way the resulting effects from moisture are held low. The invention consists of a moulding with the form of an inverted t. Holes (2) are located for attachment of the moulding to the lower floor. The lower part of the moulding has also at right angle going passages (5). The supports (4), shaped of the moulding on the either side, are used to carry plate-type material, which between two moldings shaped the ventilated space.

Abstract: Procedure of locating expansion joints (7) in a concrete bed (3,4) during manufacture (casting) by locating pre-fabricated joint elements (11,12) consisting of long rails made of reinforced concrete in pairs as a form and glide path (1,2) for smoothing and vibrating machines and in such a way that the cavity formed is filled (7) with material which has a lower E-modulus than concrete. The procedure also describes a method when two rails are secured to another by means of an adhesive. The rails (11,12) are designed to form a tongue and groove (9,10) between the rail concerned and the associated concrete slab (3,4). Holes are made for dowels (6,8) which extend from one slab to the other through the joint element and thus prevent edge raising from occuring later on.