Roof construction for use on building has several adjacent sheets of metal joined by curled-over edges

摘要

The flat metal sheets (3) may be laid on a flat or sloping metal roof, and have upturned edges (1,2). The top part of the first edge is curled over in a part-circular section to envelop the profiled second edge of the adjacent seat. The second edge is opposite to the first edge and the other two edges are flat. The metal sheets have frame members (8) which have upstanding profiled pieces which fit in between the two edges of the adjacent metal sheets.