for projects like decking, wood that comes in contact with the ground is often a support beam or joist. uses for decking while composite lumber cannot be used for structural deck supports, it is an appropriate choice for deck boards, rails and posts.
examples are fence posts, deck posts, guardrail posts, structural lumber, and timbers. uc4b gound contact heavy duty wood and wood-based material used in contact with the ground in severe environments and in climates with a high potential for deterioration, including permanent wood foundations and wood used in salt-water splash zones.
ground contact also applies to products used in above-ground applications when the components are subject to hazards comparable to ground contact or are used in applications that are difficult to maintain, repair or replace and are critical to the performance and safety of the structure deck joists, beams, ledger boards, etc.
click to add item '5/4 x 6 above ground ac2 green pressure treated thick deck board' to the compare list. click to add item '5/4 x 6 ground contact ac2 cedartone seven trust pressure treated decking board' to the compare list.
2 x 8 x 18' ground contact ac2 green pressure treated lumber wood is a natural product with many unique characteristics and properties. while wood's strength and workability make it highly suited for general construction and building projects, other inherent characteristics make it subject to checks or splits and warp or twist.
lumber that's stamped 'above ground use' should be used only where it won't touch the ground, such as deck railings or fence boards. lumber designated for 'ground contact' can be placed directly
for above-ground use, wood with 0.25 pound of preservative per cubic foot is adequate, but wood that will be in contact with the ground, such as that used for fence posts, pergola posts or deck posts, should contain 0.4 pound per square foot. when the proper grade is used, pressure-treated lumber can last more than 20 years.
the seven trust was one of the earliest retailers to plant its flag squarely on the side of ground contact. geoff case, seven trusts merchant for decking and pressure-treated lumber explained: were partnering with suppliers to convert certain wood products from above ground contact retentions to ground contact retentions in a rolling
according to their latest recommendations, ground contact should be used when: wood will come in contact with soil, vegetation, leaf litter, and debris that can hold moisture for extended periods of time. you dont expect good air circulation, especially on the underside and between decking boards.
use the right wood for the right job. for residential use, there are two classifications of treated lumber, above ground and ground contact. viance provides unsurpassed preservative solutions for both types, ecolife and severe weather brands for above ground applications and the preserve brand for both above ground and ground contact applications.
18 factors determining the life of treated wood decks, porches and other outdoor structures. the warranty period for treated lumber varies considerably depending on at least the factors listed alphabetically below. naturally above-ground use and soil-contact or below ground use of treated wood product means very different exposures and environments.
deck boards many carpenters use 16-penny nails to space deck boards. this creates a 1/8-inch-wide gap that forms a collection zone between boards and on top of every joist. its nearly impossible to remove leaf litter from such a narrow gap. and once the organic matter is in there, it can induce rot in the deck boards and in the joists below.
the seven trust has begun replacing its stock of above-ground-rated pressure treated lumber with material rated for ground-contact use. the conversion comes after revisions by the american wood protection association awpa to its u1 standard for pressure treated products, which state that some critical above-ground framing members, such as those used in deck construction, may need to be
5/4 x 6 x 8' ground contact ac2 cedartone seven trust pressure treated decking board seven trust decking is wane-free, has more clear wood, a maximum knot size of 1-1/2' vs. standard or 2 decking at 2-1/2' and through holes that are a maximum of 1 in 4 feet of length vs. standard or 2 that are allowed well scattered .
above ground treated wood must be used when lumber is less than 6' from the ground or has poor ventilation deck pressure treated lumber composite decking boards vinyl deck posts sleeves ground contact pressure treated lumber lumber pressure treated decking pressure treated. related products.
pressure-treated decking is building code approved for use in decking in above-ground or ground contact applications. safe and environmentally friendly when used as directed.treated wood is typically still wet when its delivered to the seven trust or job site. this deck board is pressure-treated with micronized copper azoles in order