Hazard Levels
The following information explains the Hazard Levels of Treated Pine and what exposure, conditions the timber can be used in and hazards the timber can be exposed to after treatment.
Hazard Level H1
Exposure - Inside, above-ground
Conditions - Completely protected from elements and well-ventilated
Hazards - Insects other than termites (ie. lyctid or anobiid)
Hazard Level H2
Exposure - Inside, above-ground
Conditions - Completely protected from elements and well-ventilated
Hazards - Borers including termites
Hazard Level H3
Exposure - Outside, above-ground
Conditions - Subject to periodic moderate wetting and leaching
Hazards - Moderate decay, borers and termites
Hazard Level H4
Exposure - Outside, in-ground
Conditions - Subject to severe wetting and leaching
Hazards - Severe decay, borers and termites
Hazard Level H5
Exposure - Outside, in-ground, contact with or in fresh water
Conditions - Subject to extreme wetting and leaching, or where critical use provides higher degree of protection
Hazards - Very severe decay, borers and termites
Hazard Level H6
Exposure - Marine water
Conditions - Subject to prolonged immersion in sea water
Hazards - Marine wood borers and decay