The basic specification for hot dip galvanized coatings on iron and steel articles is defined by a single standard, BS EN ISO 1461 "Hot dip galvanized coatings on iron and steel articles - specifications and test methods".

The standard hot dip galvanized coating of steel is to 85 microns a coating of 140 microns is achievable by shotblasting prior to galvanizing.

Click on the link opposite to see what the approximate corrosion rates are in the area your project is located.