heavy duty wood screws Most commonly, pressure-treated wood is used in construction areas that are exposed to extreme outside conditions. The wood’s corrosivity increases when it comes in contact with metal.
In 2004, the chemicals used to treat this kind of wood were changed to eliminate many dangerous and harmful substances, such as arsenic. We’ll be taking a closer look at the reasons why only reputable stainless steel fasteners and high-quality industrial consumables should be used when treating pressure-treated wood.
Copper azole (also known as alkaline copper triternary) and copper quaternary (also known as copper quaternary) are two of the most common chemicals used for pressure-treating wood.
Your body’s structural integrity will be seriously affected if you use fasteners and consumables made of metals that aren’t resistant to these corrosive properties. Two corrosion-resistant systems must be used with pressure-treated wood with stainless steel fasteners and hot-dip galvanised steel.
Our screws are made from different grades of stainless steel, so each screw is suitable for other purposes. You’ll find A2 and A4 in each stainless steel wood screws product.
Grades of Stainless Steel
The number and letter stand for the grade of stainless steel. A2 (classic 18/8) is the most popular grade known as “type 304”. A4 is the second-most common grade. It is known for its corrosion resistance. Our A4 stainless steel bolts can be used in high-pollution areas and coastal regions.
Screw Design And Shape
You should also consider what type of screw you will need to complete the job. Countersunk screws are great for landscaping and decking. They can be positioned flush with the surface of the surrounding materials.
These screws can be used for outdoor hardwood and softwood applications to reduce torque. Roundhead bolts can be used to decorate or areas where the finish does not need to be flat (timber decking and timber cladding).
Outdoor Screws: Which Types Are Best?
Why use outdoor screws? Outdoor screws are best if you have an outdoor project. Screws that have corroded or become unusable can cause problems later on.
Some screws are not made for outdoor use. It is essential to select the correct type of screws for your project. We will be looking at four different classes that may suit your needs.
1. Stainless Steel Screws
Although most screws are made from steel, ordinary steel is less resistant to corrosion than stainless steel. Stainless steel screws can be more costly, but outdoor projects will not require stainless steel screws.
Stainless steel, also known as mild steel, is more resistant to corrosion than carbon steel. Carbon steel is made from iron and carbon. Stainless steel is self-possessed of chromium, iron, and nickel. This increases the corrosion resistance. There are many sizes and types of steel.
2. Galvanised Screws
Galvanised screws are coated with zinc to resist corrosion. These screws are ideal for use with treated lumber because chemicals used to treat it can cause decay.
One of two ways to coat zinc on outdoor screws is hot-dipping or electro-plating. This produces a thicker coating of zinc. Electro-plated screws should not be used on certain types of lumber treated as they can cause black stains. Galvanised bolts should be used in conjunction with these screws.
3. Silicon Bronze Screws
Most of the use of silicon bronze screws is in the marine industry. They are mainly made of bronze and a little bit of silicon. These outdoor screws can withstand constant saltwater exposure.
4. Decking Screws
Decking screws are resistant to corrosion. These screws are typically made from stainless steel. They can be coated with ceramic; zinc plated or has high copper content.
These pan head wood heavy duty wood screws can be used to build fences, decks, sheds or other outdoor timber structures frequently exposed to the elements and rain.
5. Masonry Screws
These self-tapping screws can be used in base materials, including concrete, brick, mortar joints/block, and CMU. They can be made from stainless steel or carbon steel and have a coating or not. There are two types of masonry screws available, each with a different head style.
Each one is designed for various purposes. A flat countersunk heavy duty wood screws is best for applications in which the head must be countersunk into the material. A hex washer should be used if the heavy duty wood screws head is placed on top of the material.
6. Concrete Screws
They have high- and low-toothed alternating threads. While the screw is being installed, the lead thread on the masonry screws does all of the cutting of the material.
The lead thread will become duller and stop being able to cut threads. The abrasiveness and length of the door hinge screws will determine how long a specific screw can be tapped.
7. Wood Screws
There are many options for wood screws with oval, flat or pan heads. These screws have a sharp point and tapered shafts with partially threaded. Shorter lengths can be fully threaded.
The shank’s unthreaded section is designed to slide through the top board, preventing cross-threading and allowing the wood pieces to be pulled together.
How to Choose the Best Fasteners for Your Construction Project?
Selecting the proper fasteners is an essential step in building a quality project. For optimal performance, all fasteners are tested and designed for specific applications. The end-user must follow all instructions to ensure proper product installation.
Failure to follow these instructions could cause the product to fail and invalidate any warranties. Stainless steel timber screws are recommended for wood installation in damp environments such as bathrooms.
It would be best if you considered the environment when selecting fasteners. This includes size, thread length, head, coating, material and point. It is essential to adhere to the manufacturer’s load limit. This can cause damage to the connection.
If the fastener splits the wood, it will not be able to carry a published weight. In this case, pre-drilling may be an option. All carbon-steel-based fasteners are susceptible to corrosion and rust. When choosing corrosion-resistant fasteners, care must be taken.
Summary
The team of experts will be happy to assist you with any questions about selecting the correct fasteners. Three types of cap screw heads are commonly used: the hex head and socket heads.
Structural timber screws can be made from stainless steel, carbon steel or metal alloys. The type and size choice for a specific application will depend on the required forces to secure the mechanical connection properly .
