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Twin skin systems : technical description

Steel profiles
Standard external weather sheets are available in 0.5mm and 0.7mm thicknesses; the AS20/1000 liner sheet is available in 0.4mm and 0.7mm thicknesses.

Tables 01 and 02 give the standard profile dimensions, weights, and manufacturing tolerances.

For technical and performance details of all profiles click here.

The steel used in the AS series roof and wall profiles is hot-dip
galvanised to BS EN 10327:2004, BS EN 10326:2004 or Aluzinc
coated, then finished with one of the coatings listed in Table 03 or one of an equivalent quality.

Weather sheets are available in a number of different profiles, many with matching roof and wall profiles.

In order to maintain our high standards of customer service we may replace the steel listed here with that of similar quality from different suppliers.

Table 01: Profile dimensions
Cover
• AS13/3
• all other panels

990mm
1000mm
Standard lengths 1000 - 12000mm
(others available on request)
Weight
• 0.4mm thick
• 0.5mm thick
• 0.7mm thick

3.49 kg/m²
4.57 kg/m²
6.49 kg/m²

Table 02: Manufacturing tolerances
Cut to length
L < 3m
L > 3m

+/- 5mm
+/- 10mm
Cover width -0mm / +3mm
End square -3mm / +3mm

 

Table 03: Twin skin steel coatings
Weather sheet Dobel 200XT 200 micron PVC Plastisol A high performance pre-painted steel system on a hot dipped galvanised substrate. The outer face is finished with a leather-grain embossed PVC while the inner face is finished with a heat cured epoxy paint system.
Dobel Nova A 50 micron thick acrylic polymer coating which has high wear resistance, excellent colourfastness and good flexibility. The coating contains no PVC or Isocyanates and the material is wholly recyclable.
Polyester A polyester coating with a medium term life.
Agri-Steel A polyester coating recommended for the agricultural market. Agri-Steel has a superior substrate coating and interior paint finish when compared to standard polyester.
Corus HPS200 A durable organic coating with Scintilla finish on a substrate treated with hot-dipped zinc-aluminium alloy.
Corus and Dobel PVDF A 27 micron thick stoved flurocarbon coating: excellent colour stability at temperatures as high as 120ºC.
Liner Sheet White lining enamel Single coat, 18 micron thick finish offers an easy to clean surface. Standard colour ‘bright white’.
Dobel 200XT
Plastisol
200 micron thick coating for areas with high internal humidity or a corrosive environment.
Dobel Foodsafe 150 micron coating, suitable for the interiors of cold stores, food processing buildings and other hygiene applications.