What type of screws should be used with treated lumber?
If you use regular screws with pressure treated wood, they may bend or slip and can become corroded by the preservative chemicals contained in the wood. Thus, we recommend using 305 or 18-8 grade stainless steel screws with an advanced anti-corrosive coating, like the Hillman Fasteners’ DeckPlus 48419 screws.
What hardware should I use for pressure treated wood?
Hot-dip galvanized or stainless steel fasteners, anchors and hardware are recommended by the Preservative Treated Wood Industry for use with treated wood. This has been the position of this industry for years and their position has not changed with the transition to the alternative copper-based products.
What is a ACQ rated fastener?
ACQ Rated. These screws are designed specifically to be used with ACQ or Alkaline Copper Quaternary, Lumber, which is the new standard for pressure treated lumber. The wood’s higher copper content means it is highly corrosive to many metal fasteners, however, this finish resists the corrosion.
Are deck screws ACQ?
We provide a comprehensive range of ACQ compliant screws….Green Deck Screw, Flat Head with Nibs, Square Drive, Coarse Thread, Type 17 Point.
| Drive required : | Square |
|---|---|
| Finish : | ACQ Green Ceramic |
| Screw Size : | 8 |
| Length : | 1 3/4 in, 2 in |
Can zinc screws be used in treated lumber?
Fasteners for preservative-treated wood shall be of hot dipped zinc-coated galvanized steel, stainless steel, silicon bronze or copper. One-half-inch (12.7 mm) diameter or greater steel bolts.
Are galvanized nails oK for treated wood?
For most applications, however, best nails for pressure treated lumber are either hot dipped galvanized nails and bolts. For screws we recommend using ones that have a protective coating that is designed for use with pressure treated lumber. one example would be Outlaw fasteners.
What is ACQ approved?
Pressure treated lumber is treated with Alkaline Copper Quaternary (ACQ), an environmentally friendly water-based preservative that is free of arsenic and chromium.
Can I use galvanized screws in treated lumber?
Mechanically galvanized screws are generally suitable for decks and other outdoor projects made of pressure-treated lumber. Nevertheless, you should not use them with PT lumber in contact with the soil, in high-moisture areas, or in areas with salt content in the air.
What does ACQ mean in lumber?
Alkaline Copper Quaternary
Alkaline Copper Quaternary (ACQ) ACQ wood preservatives (types A, B, C, and D) are composed of copper oxide and a quaternary ammonia compound. The absence of chemicals like arsenic or chromium has made ACQ one of the most widely used residential wood preservatives.
Is ACQ lumber safe?
ACQ has relatively low risks, based on its components of copper oxide and quaternary ammonium compounds. Results showed that ACQ-treated wood is essentially non-toxic by normal dermal and oral exposures.
Can galvanized nails be used on pressure treated wood?
For most applications, however, best nails for pressure treated lumber are either hot dipped galvanized nails and bolts. For screws we recommend using ones that have a protective coating that is designed for use with pressure treated lumber.
Is it safe to use ACQ treated lumber?
The switch to ACQ treated lumber may be a good move for a safer environment, but problems with the structural stability of the buildings could result if the proper fasteners and connection materials are not used in conjunction with the newly treated lumber.
What happens to fasteners when exposed to ACQ?
However, ACQ treated lumber is more corrosive to metal, so the right fastener is key to a safe, long lasting deck, fence or other outdoor project. When nails are exposed to ACQ, a chemical reaction occurs, which accelerates the corrosion rate of the fastener.
What happens to fasteners when pressure treated wood is used?
Pressure-treated lumber undergoes a chemical process that may cause the accelerated corrosion of metals that come in contact with the wood (like screws and other fasteners). Once the fasteners have corroded, replacing them can be an immensely time-consuming repair for you, depending on the project.
What kind of hardware is used for ACQ?
Some manufacturers also sell hardware designed for ACQ lumber that’s been polymer coated, rather than powder coated. This method is similar to powder coating since it puts a tough, corrosion-resistant coating on the metal that protects it from the chemicals in the wood.