Mild Steel
Types and Durability
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Description Mild Steel (Infill Panels) |
Expected Lifespan (Years ) |
Adjustment Factors
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General
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| Vitreous enameled steel to BS 3830, classified not lower than Class B when tested to BS 1344:Part 2. |
30
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1st stage adjustment factor:
In industrial areas (heavy polluted): -15% years In urban areas: -10% years In suburban areas: -0% years 2nd stage adjustment factor: Within 20m from express way: -20% years Within 20m from major arterial road: -10% years Within 20m from light traffic road: – 5% years Within 20m from sea water/ area prone to salt spray: -15% years Test certificate from approved local testing authority : +15% years |
| Pre-galvanized mild steel to BS EN 10142, minimum zinc coating weight 610g/m². Factory applied organic coating, 25-50 micron nominal thickness. |
25
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| Hot dip galvanized steel to BS EN 10142 (pre-galvanized) or BS EN 10147 (post-galvanized), minimum zinc coating weight 275g/m². PVC/plastisol coating, 200 micron nominal thickness. |
25
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| Hot dip galvanized steel to BS EN 10142 (pre-galvanized) or BS EN 10147 (post-galvanized), minimum zinc coating weight 450g/m². Factory applied organic coating, 25-50 micron nominal thickness. |
20
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| Hot dip galvanized steel to BS EN 10142 (pre-galvanized) or BS EN 10147 (post-galvanized), minimum zinc coating weight 275g/m². Factory applied organic coating, 25-50 micron nominal thickness. |
15
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| Unclassified, ie mild steel, surface protection less than above specifications. |
< 15
|
Uninsured
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Combination of adjustment factors (1st stage and 2nd stage) should be added to obtain the durability values. Refer to durability calculator.
Note: The life of metal coatings is influenced by the colour of the coating, the orientation of the building, and by the environmental conditions. Detailed guidance on lives and on any guarantee or warranty schemes is available from manufacturers. Proprietary products are available for the re-coating of factory applied coatings.