What is 6 4 Lumber and How is it Used in Woodworking? A Beginner’s Guide

Are you familiar with 6 4 lumber? It may sound confusing, but it’s actually a commonly used term in the construction industry. If you’re planning a DIY project or hiring a contractor to build something, understanding 6 4 lumber is essential. In simple terms, 6 4 lumber refers to wood that is 6 quarters of an inch thick, or

5 inches. It’s a popular choice for framing, decking, and other outdoor structures. So, why is it called 6 4? Think of it like ordering a steak – if you order a 6-ounce steak, that means it weighs 6 ounces.

Similarly, 6 4 indicates the thickness of the wood. Now that we have that cleared up, let’s dive into why 6 4 lumber is so useful.

Understanding Lumber Measurements

If you’ve ever gone to purchase lumber, you may have felt overwhelmed by the different measurements and size options available. One measurement you may have come across is “6/4” lumber. This measurement refers to the thickness of the board, with 6/4 lumber being 1 1/2 inches thick.

The reason it is called “6/4” is because it is calculated from the rough boards before they are planed down to their final size. This can be confusing, as a 2×4 board actually measures 1 1/2 by 3 1/2 inches. So when you see “6/4” lumber, you can expect it to be a thicker and sturdier option than the more common 1 inch thick boards.

It’s important to understand lumber measurements to ensure you are selecting the right type and size for your project.

Different Types of Lumber Measurements

Lumber measurements can be quite confusing, especially for those who are new to woodworking. The three main dimensions used to describe lumber are length, width, and thickness. However, the way in which these dimensions are measured can vary depending on where you are located.

For example, in the United States, lumber is usually measured in inches, while in other parts of the world, it may be measured in millimeters or centimeters. Additionally, there are different ways to measure the thickness of lumber, including nominal thickness and actual thickness. Nominal thickness refers to the size that the lumber was cut to, while actual thickness refers to the thickness of the lumber after it has been planed.

It’s important to understand these differences in order to accurately measure and use lumber in your woodworking projects. By familiarizing yourself with these different lumber measurements, you can ensure that you are selecting the right pieces for your project and achieving the desired results. So take some time to learn about the various measurements and don’t be afraid to ask for help if you’re unsure.

What is a 6x4 lumber
What is a 6X4 Lumber

What Does 6 4 Lumber Mean?

If you’re new to construction or woodworking, you may have heard the term “6 4 lumber” and wondered what it means. Simply put, lumber measurements can be a bit confusing, with various systems used around the world. In North America, the measurement system is based on “quarters,” with each quarter representing a quarter of an inch in thickness.

So, 6/4 lumber means that the wood is six-quarters thick, or one and a half inches. Other common thicknesses include 4/4 (one inch), 8/4 (two inches), and 12/4 (three inches). It’s important to understand the measurements when purchasing lumber, as it determines the strength and stability of your final project.

So next time you’re shopping for lumber, be sure to ask for the thickness you need, with the corresponding quarter-inch measurement.

Uses of 6 4 Lumber

6/4 lumber is a versatile type of wood that’s commonly used in construction and woodworking projects. This lumber is a bit thicker than standard 2x4s, making it ideal for applications that require heavier materials. One popular use for 6/4 lumber is in building sturdy decks and outdoor structures that can withstand exposure to the elements.

It’s also commonly used for furniture making, particularly in rustic or industrial designs. 6/4 lumber can be cut and sanded to create smooth, uniform surfaces, making it a great choice for tabletops, shelves, and other decorative pieces. Additionally, this type of lumber is often used in woodworking projects that require intricate cuts or details, such as carving or woodturning.

Overall, 6/4 lumber offers a durable and aesthetically pleasing option for a variety of construction and woodworking needs.

Construction Applications

When it comes to construction, 6 4 lumber is a popular choice for various applications. This type of lumber is commonly used for outdoor decks, fences, and pergolas thanks to its durability and strength. Additionally, it’s also a great choice for exterior siding and trim due to its natural resistance to rot and decay.

Because 6 4 lumber is made from high-quality wood, it’s also great for interior projects that require stability and a sleek finish. If you’re looking for a versatile material that can withstand the wear and tear of outdoor elements, 6 4 lumber is an excellent choice. Not only does it look great, but it will also last for years to come.

So whether you’re building a new deck or adding some finishing touches to your home’s interior, consider using 6 4 lumber for your next project.

Furniture and Woodworking

If you’re into DIY woodworking or furniture building, then you’re no stranger to the term 6 4 lumber. This type of lumber is a popular choice among woodworkers because of its versatility and strength. It’s perfect for a wide range of projects, from outdoor furniture to interior decor.

6 4 lumber is named after its thickness, which is 6/4 of an inch (or 5 inches). One of the most common uses for 6 4 lumber is for constructing butcher-block countertops.

Its thickness and hardness make it ideal for withstanding the wear and tear of daily use in the kitchen. Another popular use for 6 4 lumber is for making outdoor furniture. Its strength and durability make it perfect for withstanding the elements.

From Adirondack chairs to garden benches, 6 4 lumber can handle anything Mother Nature throws its way. Overall, 6 4 lumber is an excellent choice for any woodworking project that requires a strong, hardworking material.

Decorative and Aesthetic Applications

6 4 Lumber can be used for a wide variety of decorative and aesthetic applications as it is known for its uniformity and attractive grain patterns. One of the most popular uses is for creating furniture, especially indoor furniture like cabinets, tables, and chairs. The smooth and even surface of 6 4 Lumber makes it easy to carve, stain, and paint, giving designers more freedom in creating complex and intricate designs.

Another great application is for flooring, where the durability and attractive surface of the lumber can create a warm and inviting atmosphere in any room. 6 4 Lumber is also popular for decorative accents such as wall paneling, trim, and crown molding, adding a touch of elegance and refinement to any room. Overall, 6 4 Lumber is a versatile material that can add both charm and functionality to any space, making it an excellent choice for a variety of decorative and aesthetic projects.

Sourcing and Purchasing 6 4 Lumber

If you’re in the business of carpentry or woodworking, you may have come across the term 6 4 lumber. But what exactly does it mean? 6 4 lumber refers to the thickness of the wood, which is 1 and 1/2 inches or 5 inches thick.

It is often used for heavy-duty applications such as beams, joists, and posts due to its strength and stability. When sourcing and purchasing 6 4 lumber, it is important to consider the species of wood, as different types will have different properties and price points. Some popular options include oak, maple, and cherry.

It is also important to ensure that the lumber is properly dried and stored to prevent warping and cracking. With its durability and versatility, 6 4 lumber can be a valuable addition to any woodworking project.

Finding 6 4 Lumber Suppliers

If you’re looking for sources for 6 4 lumber, there are a few options you can explore. The first step is to use online resources to search for lumber suppliers in your area. You might also try contacting a local building materials store to see if they can direct you to a supplier.

In addition, you can attend industry events or become part of a professional organization to network with other professionals in the building industry. Another option is to purchase lumber online, but this option requires careful research to make sure you’re ordering from a reputable supplier. Ultimately, it’s important to do your due diligence and get multiple quotes, so you can make an informed decision and find the best supplier for your specific needs.

Factors to Consider When Purchasing 6 4 Lumber

Sourcing and purchasing 6 4 lumber can be a complex process, requiring careful consideration of a number of factors. One important factor to keep in mind is the quality of the lumber, as this can have a significant impact on the final product you create. You’ll want to look for pieces of lumber that are free from defects, such as knots or cracks, and that are straight and even.

Another important consideration is the source of the lumber, as you’ll want to ensure that it comes from a reliable and sustainable supplier. Additionally, you’ll want to think about the cost of the lumber, as this can have a big impact on your bottom line. Overall, taking the time to carefully evaluate your options and make informed decisions will help ensure that you end up with high-quality lumber that meets your specific needs.


In conclusion, 6 4 lumber is simply a way for lumber yards and woodworking enthusiasts to refer to lumber that is 1 1/2 inches thick. It’s important to keep in mind that this measurement system is unique to the lumber industry and not a reflection of a secret code or conspiracy. So if you ever hear someone say they need some 6 4 lumber, you can confidently join the conversation knowing exactly what they mean.

And if they seem impressed by your knowledge, just smile and say, “I guess you could say I’m a cut above the rest.”


What is 6×4 lumber used for?
6×4 lumber is commonly used for building framing, fences, decks, and outdoor structures.

How strong is 6×4 lumber?
The strength of 6×4 lumber depends on the type of wood used and its grade. However, on average, 6×4 lumber can support heavy loads and withstand stress and strain.

What is the cost of 6×4 lumber?
The cost of 6×4 lumber varies depending on the type of wood, grade, and location. It can range from a few dollars per linear foot to several dollars.

Is treated 6×4 lumber safe for outdoor use?
Yes, treated 6×4 lumber is safe for outdoor use as it is treated with preservatives to protect it from rot, decay, and insects.

What are the standard lengths of 6×4 lumber?
The standard lengths of 6×4 lumber are typically 8 feet, 10 feet, 12 feet, and 16 feet. However, custom lengths can also be made upon request.

How do I cut 6×4 lumber?
6×4 lumber can be cut using a circular saw, handsaw, or chainsaw. It is recommended to use safety equipment such as goggles and gloves while cutting lumber.

What is the difference between pressure-treated and non-pressure-treated 6×4 lumber?
Pressure-treated 6×4 lumber is treated with preservatives to protect it from rot, decay, and insects. Non-pressure-treated 6×4 lumber is not treated and is more susceptible to rot and decay.

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