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Pre-Curved Roofs

Low tensile metals and G 300 coated steel can be formed into a number of simple and compound shapes.  Generally, roll curving is applied to corrugated profiles, and crimp curving to trapezoidal profiles.

 

Bullnose

 

 

 

Barrel Vault

 

 

Ridge

 

Cranked Double Curve

 

 

Convex

 
 

Double Curve

 
 

 

Reverse Curve

 

A curve can be rolled in the centre of a straight length of roof cladding to provide a ridge, but for ease of fitting and transport, a lap is often required at the first purlin down from the ridge, and an end lap is formed at that point. This should be sealed in the same manner as is required for any transverse lap.

As pre-curved sheets are typically formed from medium-strength (G300) material, the lower strength of this material must be considered when considering purlin spacings and roof traffic.

 

 

 

 

Clause: 
015_001_008_000_000_000_000_000_000
Clause Number: 
15.1.8
/cop/other-products/curved-roofs#pre-curved-roofs
Revision Category: 
2 - Editing and rearrangement
Revision Detail: 

This clause has been revised as part of the overall revision of Curved Roofs.

Draft Clause: 
014_001_007_000_000_000_000_000_000