COLORBOND® STEEL RAINWATER PRODUCTS
Technical Data :
Index
How to select a steel grade for roofing: There are many factors governing the selection of the recommended grade of COLORBOND® steel to use. Atmospheric factors and the nature of the activity within the building are among the most important.
Table 1 below serves as a guide for selection in marine environments.
ZINCALUME® steel and COLORBOND® steel are also suitable for light industrial environments however where the product is subject to heavy fallout, acid, alkali laden air or other corrosive chemicals please contact BlueScope Steel Direct on 1 800 022 999 for advice on the recommended product and fasteners to use. This also applies to harsh service activities carried out within buildings such as intensive animal farming and indoor swimming pools.
Table 1: Recommended CSA Product Guide for Roofing in Marine Environments
Severity
Approximate Distance From Marine Influence
Recommended Product
Very Severe
<100m from breaking surf
COLORBOND® Stainless steel
Severe
100-200m from breaking surf
50-100m from calm still water*
(e.g. protected harbour)
COLORBOND® Ultra steel
Severe
200m - 400m from breaking surf; or
50 - 100m from calm still water (e.g. harbour)
COLORBOND® XRW steel or ZINCALUME® steel
Moderate
>400m from breaking surf
>100m from calm salt water (e.g. harbour)
COLORBOND® XRW steel or ZINCALUME® steel
Benign
> 1000m from breaking surf; or > 500m from calm still water (e.g. harbour) Benign
COLORBOND® XRW steel, or ZINCALUME® steel
Note:
Absolute performance is subject to local conditions (e.g. prevailing winds) and unwashed areas (i.e. regions of the roof not naturally washed by rain).
Above table applies to roofing product only.
The above table applies to salt marine influences only. For installations subject to severe, heavy industrial conditions, it is essential to consult a BlueScope Sales Office for advice on the appropriate product. Please phone BlueScope Steel for more information.
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