U-shaped profiled channels and methods of manufacturing the same.

摘要

1. A metallic channel of U-shaped cross section, of which the outer edges (4) of the side walls (2) are reinforced by curling the said outer edges, characterised in that each edge curl is formed around a round metallic wire (5) having a diameter in the inclusive range 2-10 mm, and preferably between 2 and 3 mm, whereby to enclose the said wire.