Preservative Use Categories | Western Wood Preservers Institute
Wood treated to UC4C can be used where there is extremely high potential for deterioration, with considerable exposure to moisture such as in rivers or lakes. UC4B service conditions: Ground contact or fresh water contact, heavy duty, critically important components.
Treated Lumber Classifications: What You Need to Know - Decks …
2020年7月15日 · For decks and docks of all kinds, many contractors choose UC4B and UC4C for the decking and framing. Experienced contractors know that you need to have lumber that is certified for “ground contact” or higher for humid, harsh, or near water applications.
What is the Best Pressure Treated Wood for Ground Contact?
2021年11月13日 · The best treated lumber levels are UC4A and UC4B since the AWPA designates them for ground contact service conditions. UC4A is typically used to construct fences and decks, making it an ideal treated wood for building a …
6 in. x 6 in. x 10 ft. #2 4B Ground Contact Cedar-Tone Pressure-Treated ...
6 x 6 x 10 #2 Pressure-Treated Southern Yellow Pine 4B Cedar-Tone Timber meets the highest grading standards for strength and appearance. This lumber is pressure treated in order to protect it from termites and rot. Ideal for a variety of applications, including decks, docks, ramps, and other outdoor projects where lumber is exposed to the ...
The American Wood Protection Association (AWPA) Book of Standards addresses changes in Above Ground (UC3B) and Ground Contact (UC4A) use conditions for treated wood. As part of the standards process, the AWPA standards define situations where pressure preservative treated lumber may be
Treated Lumber – Cobb Lumber
UC4B – Wood and wood based materials used in contact with the ground either in severe environments, such as horticultural sites, in climates with a high potential for deterioration, in critically important components. SERVICE CONDITIONS: Ground contact, fresh water, important construction components, or in salt water splash zones
UC4B — Wood and wood based materials used in contact with the ground either in severe environments, such as horticultural sites, in climates with a high potential for deterioration, in critically important components. USE ENVIRONMENT: Severe ground contact or salt water splash. Difficult replacement. Exposed to all weather cycles.
Pressure Treated Wood: Types, Grading Standards & More
2007年7月16日 · 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.
For Code Officials - AWPA
You should also look for the appropriate AWPA Use Category for the application, such as UC3B or UC4A. Note that in most cases, wood treated to a higher Use Category may be used for applications in a lower Use Category. For example, sill plates are a UC2 application, but you may use wood treated to UC2 requirements or higher, such as UC3B.
Application Standards - ProWood lumber
Wood treated to (UC3B) above-ground standards is ideal for use in light-duty situations where wood will not be in contact with moisture or the ground. Above-ground contact lumber applications must adhere to UC4A requirements when wood is used in the following scenarios: Light Duty covers an internal standard that we treat to that we call UFPB.