(57) A screed rail (2) of galvanised steel plate is disclosed, with a web (4) with lateral
crankings (6) which in use form groove-and-tongue locking joints at respective sides
of the screed rail between adjacent concrete slabs, and an upper vertical edge strip
(8) used as support for a vibrator beam by pouring a concrete slab (10), e.g. a floor,
between two fixed screed rails (2), the screed rail (2) constituting a permanent formwork
side for the concrete slab (10), where the said upper edge strip (8) comprises a bent
edge (12) arranged to extend along the floor surface, i.e. so that the edge (12) is
covering a possible contraction crack, and that the screed rail (2), at the side facing
away from the bent edge (12), is provided with connecting means and/or surface structure
arranged to ensure good adherence between the said side of the screed rail (2) and
the concrete slab (10). By means of simple measures it is hereby possible to avoid
the previously mentioned drawbacks and to achieve some hitherto unknown advantages
in use. At the side opposite said the said bent edge, the screed rail is thus designed
so that good adherence to the concrete slab is ensured, i.e. so that a possible contraction
crack will always appear at the side where the bent edge is situated so that the contraction
edge will always be covered by the bent edge.
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