Required Uses for Ground Contact
Ground Contact Treated Wood (instead of standard pressure treated) is now required when…
… joists and beams are used that are difficult to maintain, repair, or replace, and are critical to the performance and safety of the structure.
… treated wood is used less than 6″ off the ground when installed.
… treated wood is used where it will be frequently wetted on a recurring basis.
… treated wood is used in tropical climates.
Koppers Performance Chemicals put together a helpful illustration that shows how the typical deck will be effected by the change.
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