Treated Wood Industry Looks to Toughen Standards
A close-up of the label on a piece of CCA-treated wood on a guardrail by a road in North Dartmouth, Mass., near New Bedford south of Boston. The label specifies a chemical loading or “retention” of 40 pcf, suitable for ground contact, although the wood is installed above the ground. The wood has weathered, but is sound and free from rot, despite being subjected to years of damage from road salt, snowplowing, vehicle contact, and weed-whacking.