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. Must be used when lumber is less than 6 inches from the ground or has poor ventilation.
Do I need ground contact lumber for deck?
72% of lumber dealers said the new standards helped their business by eliminating dual inventories. All the professional deck builders interviewed said all components should be ground-contact treated lumber. Deck safety was this group's unanimous No.Feb 20, 2018
How long will ground contact pressure treated wood last?
40 years
What is the best pressure-treated lumber for ground contact?
UC5A, UC5B, UC5C are used for ground contact or directly in the ground and where salt or brackish water is continuously present. UCFA and UCFB are used where pressure-treated wood and fire retardant wood is required.Oct 26, 2020
What is better #1 or #2 lumber?
#1 Grade: When appearance becomes more of a factor, #1 Grade will contain smaller, fewer, sound, tight knots and have less wane than found in #2 Grade. ... While it can have wane similar to that found in #1 Grade, it has tighter growth rings and contains smaller and fewer knots.
What is the difference between number 1 and number 2 pressure treated lumber?
Typically wood that is two or more inches thick is graded only for strength, denoted by #1, #2 and so on. And because stronger lumber has fewer and smaller knots, it's typically more attractive. So the general rule of thumb for lumber grades is this: the lower the number, the more strength and better appearance.
What is the best grade of pressure treated lumber?
The best pressure treated wood for decks is Select, #1 or #2 grade wood. Within all grades, there are planks that will be freer of blemishes and knots and may be called premium. Decking materials such as 2×6 and 5/4×6 frequently are of better-looking #1 and #2 lumber.
What is Number 2 grade lumber?
2 Lumber. No. 2 lumber is the most common grade for framing. Lumber of this grade contains few defects, but knots are allowed of any quality as long as they are well spaced and do not exceed the size regulations.Sep 25, 2015
What are the dimensions of a pressure treated 4x4?
The outside dimensions of the standard 4x4 measure 3-1/2" x 3-1/2", and the outside dimensions of the standard 6x6 measure 5-1/2" x 5-1/2".Jun 10, 2011
How tall are 4x4 posts?
But in 2015, the IRC introduced Table R507. 4, which limited the height of a 4x4 deck support post to eight feet, without any consideration for how much area of deck the post was supporting. The engineering behind post sizing is based on how much weight the post can support without starting to bend out of plane.
How are post caps measured?
Measuring external post caps is a fairly simple process. It is essentially measuring from the inner edge of one of the post cap's walls to the opposite side's inner edge and it should consistently match with the corresponding post size.
How wide is a fence post?
You should choose post materials with a 4 inch width and 4 inch thickness, giving you square wooden board for you post. The height will be equal the height of your fence plus 2 to 3 feet.Nov 26, 2012
Is pressure treated lumber expensive?
Price - In some cases, pressure-treated wood costs half as much as premium woods like cedar. It is the least expensive of all decking materials. Durability - Pressure-treated wood is strong enough to withstand decades of use and abuse.
Why is pressure treated lumber so expensive?
“Early in the pandemic, supply-chain disruptions caused a shortage of the chemicals used to make pressure-treated wood.” Those early disruptions, coupled with a continued shortage of raw material, have caused the prices for pressure-treated decking boards to double since last year.May 14, 2021