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Pressure treated wood for ground contact commonly has twice the chemical retention level as above ground rated lumber. UC3B or UC4A are best for ground contact use. In-Ground Contact for Critical Use
16 lip 2007 · Pressure treated wood is lumber impregnated with a variety of preservative chemicals to prevent rot and insect infestation in exterior applications like decks and fences. Several species of wood can be treated, but a regionally available species usually predominates in any particular locale.
ProWood ® treated lumber offers a wide selection of grades to suit virtually any outdoor project. Our most popular and versatile, ground contact, is suited for most applications and offers an unbeatable warranty.
If you’re using pressure treated lumber for something that’ll touch the ground, such as a deck post or fence post, make sure it’s rated for ground contact. Find 2 by 6 treated lumber, treated 6 by 6 posts and other common sizes at Lowe's.
13 lis 2021 · The best pressure-treated wood for ground contact or within 6″ (150mm) is wood classified as UC4A or UC4B. Often lumber companies will make this easy by tagging the wood as treated for ground contact.
Pressure-treated wood is softwood lumber, typically southern yellow pine that has been chemically treated to resist rot, decay, and termites. All treated wood is now “ground contact”. “Ground contact” has a high chemical retention level and can be placed directly on or in the ground.
The labels for these products, however, usually just state “above ground,” “ground contact,” or “ground contact/freshwater use,” which correspond to progressively higher retention levels. AWPA minimum retention levels (in lb. per cu. ft.) Preservative: ACQ. Above ground: 0.15. Ground contact: 0.40. Ground contact, heavy duty: 0.60
