Abstract: The present invention relates to a roof cladding element, which roof cladding element has been manufactured of profiled plate material and which roof cladding elements are adjacently and in succession mountable such that the edges of a roof cladding element will be placed a distance overlapping with the edges of adjacent roof cladding elements. The present invention also relates to a method for manufacturing roof cladding elements in which method a plate material in strip form is formed into profiled roof cladding element strip with a forming device and in which method a finished formed roof cladding element strip is cut with a cutting device at even intervals into roof cladding elements. Characteristic to a roof cladding element in accordance with the invention is the fact that to at least one corner of a roof cladding element a recess reaching at least partly under the lower surface of the part of the roof cladding element surrounding the corner has been formed.

Abstract: An apparatus for roll forming purlins and the like from a metal strip (37) allows the choice between upwards bending and downwards bending by means of two sets of forming rollers (40, 43) arranged on either side of drive rollers (38, 39, 41, 42) feeding the strip (37). At least one of the two set of forming rollers (40, 43) is vertically adjustable. The apparatus can be applied, for instance, to the forming of steel profiles for construction purposes.