Category D/C4
Category D/C4

Category D/C4 (Galvanised Steel- Solvent Borne)

Category D: High. This category occurs mainly on the coast. Around sheltered bays, Category D extends up to 50 metres inland from the shoreline. In areas with rough seas and surf, it extends from about several hundred metres inland to about 1 kilometre inland. As with Categories B and C, the extent depends on winds, wave action and topography. Industrial regions with an aggressive atmosphere may also be in this category, but in Australia and New Zealand these are only likely to be found within 1.5 kilometres of the plant. This category extends inside the plant where it is best considered as a micro-environment. Damp, contaminated interior environments such as occur in swimming pool enclosures, dye works, paper manufacturers, foundries, smelters and chemical processing plants may also extend into this category.