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Reminder: The AWPA has passed changes to the standards of pressure treated lumber

The American Wood Protection Association has passed changes to the standards requiring pressure treated wood used in many physically above-ground applications be treated to Ground Contact requirements. The International Code Council Evaluation Service (ICC-ES) will include these changes in its evaluation report.

The International Residential Code (IRC) requires treated wood to comply with AWPA standards.

The new standards require the user (builder, consumer, or inspector) to select Ground Contact Treatment for physically above-ground material when:

• soil or other debris may build up and stay in contact with the wood • there is insufficient ventilation to allow air circulation around the wood • material is installed <6 inches above the ground on permeable building materials • material is installed in contact with non-durable untreated or older construction with any evidence of decay • wood is subject to frequent or recurring wetting • used in tropical climates • the wood is both: — difficult to maintain, repair or replace and — critical to the performance and safety of the entire system

Joists and beams for decks and docks fit both of these final criteria and therefore require Ground Contact treatment.

As of last spring Concord Lumber Corporation is only stocking pressure treated lumber that has been treated for ground contact. This is a reminder that in 2017 we expect to see these new rule strictly enforced. If you have any questions or concerns please contact either our Concord Lumber or Littleton Lumber locations.

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