Crimped Curved Roof Sheet / North Light Curve

Combinations of curves and straight sections must be laid out on the roof to fit purlin locations where fastening and sheet end laps occur. Basic rules that govern the design.

  1. Straight tails on curves must span across at least two purlins.
  2. Maximum length from curve to tail end is normally limited by transport and handling to 6m.
  3. Laps must be in areas of roof pitch that meet the minimum pitch requirement for the profile.
  4. A roof shape transition from convex to concave curves must have a straight section of at least 300mm located over a purlin to allow fixing.
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