What metals and protective coatings does the Pressure Treated Timber Industry recommend for use with these newer products?
Hot-dip galvanised or stainless steel fasteners, anchors and hardware are recommended by the Pressure Treated Timber Industry for use with treated wood. This has been the position of this industry for years and their position has not changed with the transition to the alternative copper-based products. In the past this industry did not address the required levels of galvanizing, however most of those in the industry now provide information regarding the minimum level of galvanizing that should be used. The thicker the galvanised coating the longer the expected service life of the fastener, connector, anchor, or other hardware will be. Electroplated / electro galvanised and mechanically galvanised coatings should not be considered to be hot-dip galvanised. (Class 55, or higher, mechanical galvanizing provides galvanizing equivalent to the hot-dip galvanizing used on timber connectors and fasteners. Ref. ASTM B695 for additional information.) It is also worth noting that the galvanised c
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