SupaTimber® pressure-treated wood is protected from rot, decay and termite attack with Chromated Copper Arsenate (CCA) wood preservative.
Generally, the label authorizes use of CCA in most industrial and commercial applications. Most of those applications are heavy retention treatments of 0.50 or more pounds per cubic foot. The only standards under which lower retention treatments may be used are C9, C25, C28, C33 and C34. Dimension lumber historically treated with CCA to .25 or .40 under AWPA standard C2 must now be treated with alternative preservatives.
Examples of CCA Uses that will be permissible under the new label language
The following list is taken from the 2001 edition of the AWPA standards to illustrate examples of the types of wood that fall within each standard. While the list is not exhaustive, it does provide some examples of specific uses within each AWPA commodity standards that may be treated with CCA.
Lumber and Timber for Salt Water Use Only (AWPA Standard C2)
Aquaculture timber, in salt water and subject to marine borer attack
Boat Building material
- Lumber, timbers, plywood, in salt water and subject to marine borer attack
Bulkhead Sheathing
- In salt water and subject to marine borer attack
Mariculture lumbers and timbers
- In brackish or saltwater use and subject to marine borer attack
Marine lumber and timbers
- In brackish or saltwater use and subject to marine borer attack
Oyster farming timbers
Highway Material
- Structural lumber and timbers in salt water use and subject to marine borer attack
Piles (AWPA Standard C3)
Highway Material
- Piles, foundation, land and fresh water use
- Piling in salt water use and subject to marine borer attack
Piles
- Foundation (round)
- Land and fresh water use (round)
- Marine (round) in salt or brackish and subject to marine borer attack
- Marine, dual treatment (round)
Poles (AWPA Standard C4)
Agriculture, Wood used on farms
- Round poles
- As round structural members
Highway material
- Poles, lighting
Poles, agriculture
- Round
Poles, building
- Round
Poles, utility
- Distribution
- Transmission
Plywood (AWPA Standard C9)
Agriculture, Wood used on farms
- Plywood, not in soil contact
- Plywood, in soil contact
Boat building material
- Plywood, fresh water
- Lumber, timbers, plywood, in salt water and subject to marine borer attack
Building construction material
- Roof decking, plywood
Decking, Tongue and Groove
- Flooring, plywood
- Subflooring, plywood
Decking
- Roof, plywood
Plywood
- Sub-floor, damp, above ground
- Exterior, above ground
- Soil contact
Wood for Highway Construction (AWPA Standard C14)
Beams and timbers, glue laminated before or after treatment
- For highway construction
Decking
- Highway bridge
Highway material
- Lumber and timber for bridges, structural members, decking, cribbing, and culverts
- Structural lumber and timbers in salt water use and subject to marine borer attack
- Piles, foundation, land and fresh water use
- Piling in salt water use and subject to marine borer attack
- Posts: Round, half-round, quarter round
- Posts: Sawn
- Poles, lighting
Glue laminated beams
Brine Storage buildings
Posts, guardrail
- Round
- Sawn
Posts, sawn four sides
- Highway
- Other
Poles, Piles and Posts (including fence posts) Used as Structural Members on Farms, and Plywood Used on Farms (AWPA Standard C16)
Agriculture, Wood used on farms
- Round poles and posts as round structural members
- Sawn poles and posts
- As structural members
- Plywood, not in soil contact
- Plywood, in soil contact
Sawn building poles and posts
- As structural members
Round building poles and posts
- As structural members
Sawn structural timbers (piles)
- Supporting residential and commercial structures
Poles, agriculture
- Round
- Sawn
Wood for Marine Construction (AWPA Standard C18)
Aquaculture timber, in salt water and subject to marine borer attack
Mariculture lumber and timbers
- In brackish or saltwater use and subject to marine borer attack
Marine lumber and timbers
- In brackish or saltwater use and subject to marine borer attack
Oyster farming timbers
Piles
- Marine (round) in salt or brackish and subject to marine borer attack
- Marine, dual treatment (round)
Lumber and Plywood for Permanent Wood Foundations (AWPA Standard C22)
Round Poles and Posts Used in Building Construction (AWPA Standard C23)
Round building poles and posts
- As structural members
Poles, building
- Round
Sawn Timber Used to Support Residential and Commercial Structures (AWPA Standard C24)
Sawn structural timbers (piles)
- Supporting residential and commercial structures
Piles
- Sawn timber piles
Sawn Crossarms (AWPA Standard C25)
Crossarms, sawn
Structural Glued-Laminated Members and Laminations before Gluing (AWPA Standard C28)
Beams and timbers, glue laminated before or after treatment
- Damp environment, above ground
- Dry environment, above ground
- Ground contact
Highway material
- Glue laminated beams
Structural Composite Lumber (AWPA Standard C33)
Highway material
- Structural composite lumber
Lumber, structural composite
- Above ground
- Soil or fresh water contact
- Highway construction
Shakes and Shingles (AWPA Standard C34)
Shakes and Shingles
Siding, commercial, residential, agricultural
- Coated
Painting and Staining or Natural Weathering
- SupaTimber® can be painted or stained to match any outdoor color scheme.
- High quality oil and latex-based paints and stains are recommended.
- Water repellent coatings can be applied to improve weathering performance.
- Left uncoated or with clear water repellent coatings, SupaTimber® will weather to a natural gray color.
- It is important to ensure that the wood is dry and free from surface deposits prior to applying any coating.
Nails, Fasteners and Fittings
Hot dipped galvanized or stainless steel fasteners and fittings are recommended. Anti-corrosion coatings applied to fasteners and fittings in contact with treated wood will enhance long-term performance. Direct contact of SupaTimber® treated wood with aluminum fasteners and fittings is not recommended.
Water Repellent and Prestain Options
SupaTimber® treated wood is also available in most markets with the built-in water repellent protection of UltraWood.
SupaTimber® DesignWood pressure-treated wood comes with a cedar tone pre-stained finish for those who want their project to have a stained finish look right from the start.
SupaTimber® Recommended Retentions for Various Non-Residential, Industrial and Commercial Applications
Application - Retention (lbs/CuFt) - Uses:
- Above Ground - 0.25
- Ground Contact Fresh Water 0.40
- Permanent Wood Foundations - 0.60 - Wood foundations, crawl spaces
- Poles - 0.60 - Building, transmission and distribution poles
- Pilings - 0.80 or 1.00 - Standard and foundation piles
- Marine Pilings - 1.50 or 2.50 - Marine Piles
Decay & Termite Protection
Wood used in outdoor environments and in high moisture conditions, is susceptible to attack from decay fungi and termites that can cause strength reduction and eventual failure of wooden structures. SupaTimber® pressure treated wood products are ideal for use in a wide range of applications where protection from biological degradation is required.
Click here for allowable application information for CCA treated wood
Safety & Handling
TO be supplied by the client.