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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
15 lip 2020 · UC4B lumber is suitable for ground contact and contact with freshwater. It is also durable enough to be used for “critical construction” projects, such as utility poles. AWPA U1 signifies that the wood has been treated according to AWPA Standards.
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.
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.
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.
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
Ground-contact pressure-treated wood: Ground-contact pressure-treated lumber can be used either above ground or in contact with the ground. Has twice the level of chemical retention and protection compared to above-ground treated wood.
