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DIY. Corrugated Sheet Roofing.
1. Corrugations should run in a straight line between the highest and lowest points, and at a right angle to the purlins (the intermediate supports).
2. The overlaps (ends and sides) depends upon the sloop of the roof (see below).
3. Purlin spacing should suit the end laps required for the size of sheet to be used.
4. Sheets should be laid so that the side overlaps are directed away from the prevailing wind.
5. All purlins should be in one plane and parallel to each other. They should be properly anchored to the supporting superstructure.
6. Ends of all sheets should be supported by purlins. The free overhang at the eaves should not exceed 300 mm.
7. 8 mm diameter (min) hook bolts, crank bolts or coach screws, should be inserted through 10 mm diameter drilled holes.- NEVER PUNCHED - in the crown of the corrugations.
Tags: diy, fix,
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