
What is the true size of a 2x4?
Eventually, the actual size of a 2x4 was standardized at 1 ½" x 3 ½" to keep the dimensions consistent throughout the industry. You can read more about the history of the 2x4 here. Standard 2x4 length 2x4 studs are typically 8 feet long, to match the standard length of a sheet of plywood or drywall.
What is the actual measurement of a 2x4?
But there is a caveat will calling a 2x4 a 2x4: It’s not really two inches by four inches as its name implies. A 2x4 is actually 3-½ inches by 1-½ inches. Many of you know this, but why is this a thing? You don’t go to Subway and pay for a $5-footlong expecting to get 11 inches (although many of you will argue this is the case).
What are the actual dimensions of 2x4?
The actual dimensions of a 2x4 are 1.5 inches by 3.5 inches or 38mm by 89mm. It’s not just 2x4’s that are smaller. Most lumber is described using nominal dimensions but is actually smaller in reality. This fact makes no difference in the building industry because architects and contractors are (hopefully) aware of this discrepancy.
What is the actual size of 2x4 lumber?
A piece of surfaced (sanded smooth) 2×4 lumber actually measures 1½ inches thick and 3½ inches wide. In rough-cut condition, a 2×4 is slightly less than 2 inches thick and approximately 4 inches wide.

When did a 2x4 become a one and a half by three and a half?
In 1964, size standards, maximum moisture content, and naming were agreed upon. The nominal 2x4 thus became the actual 1-½ x 3-½ inch board. People in the industry were able to sell “2x4s” with 34% less volume at a lower price to compete with alternatives.
Why did 2x4 get smaller?
Now, most timber is milled and planed to give it a little more of a finished look, and a little more of a consistent size and profile. Because of this extra milling, a 2x4 no longer measures a full 2 inches by four inches.
How did a 2x4 become 1.5x3 5?
The 2x4 refers to the rough-cut green wood: it shrinks during drying, then the dried wood is planed smooth, so the finished lumber is supposed to end up at 1.5"x3. 5". While it doesn't really shrink that much, the mills get more usable finished 2x4's from a given tree if they cut them slightly smaller to begin with.
How wide are old 2x4?
During the late 1940s or early 1950s, builders in many areas of North America switched to planed 2x4s that measure 1.5" x 3.5".
Why is lumber not the actual size?
The "nominal" cross-section dimensions of a piece of lumber, such as 2 X 4 or 1 X 6, are always somewhat larger than the actual, or dressed, dimensions. The reason is that dressed lumber has been surfaced or planed smooth on four sides (called S4S). The nominal measurement is made before the lumber is surfaced.
When did they start using nominal lumber?
Early concepts called for rough lumber to be of full nominal size, often in the dry condition. After World War I, the increasing demand for construction lumber led to the first national size standard in 1924. This was revised in 1926, 1928, 1939, and 1953, while still another revision is proposed for adoption in 1964.
What is the difference between framing lumber and dimensional lumber?
Light framing lumber is 2 inches to 4 inches thick and 4 inches wide. Structural light framing is 2 inches to 4 inches thick and 2 inches to 4 inches wide. Dimensional lumber and studs are 2 inches to 4 inches thick and 2 inches to 4 inches wide.
What's the longest 2x4 you can buy?
DimensionsActual Product Length (ft.)20 ft1.5 inActual Product Width (in.)3.5 in2x4Nominal Product Length (ft.)20 ft2 inNominal Product Width (in.)4 in
What is the longest 2x6 you can buy?
Subject: RE: Long lumber? 2x4 20' is typically longest length. 2x6-2x12 you can get up to 28' in a full service lumber yard.
What's the difference between a stud and a 2x4?
Wood frame walls begin with boards that are cut and planed to a standard size. Those are called "studs" and are referenced by the width and thickness of the end of the board. "2x4" is referring to a board that has a nominal size of 2 inches by 4 inches. The nominal size is not the actual size.
Why is a 2x4 called a 2x4?
0:031:01Why is a 2x4 not a 2 by 4 Video - YouTubeYouTubeStart of suggested clipEnd of suggested clipHi my name is mark Donovan from home Edition plus comm. You ever wonder why when you buy a 2x4. AndMoreHi my name is mark Donovan from home Edition plus comm. You ever wonder why when you buy a 2x4. And you actually measure it it doesn't measure 2 inches by 4 inches but instead about one and a half
What is a 2x4 slang?
a 24-ounce can of beer. I've got some 2x4s in the fridge. See more words with the same meaning: alcohol.
What is a 2x4 slang?
a 24-ounce can of beer. I've got some 2x4s in the fridge. See more words with the same meaning: alcohol.
Are 2x6 really 2x6?
2x Board Sizes 2x4 and 2x6 boards lose 1/2 inch in thickness and 1/2 inch in width before leaving the mill. That means a 2 x 4 board is actually 1-1/2 inches by 3-1/2 inches. The larger 2x boards (2x8, 2x10, etc.) lose 3/4 inch in width.
How long is the average 2x4?
2x4 - 8: 96” These come in handy for projects where I'm building something around a 4x8 sheet of plywood. With both boards being the same length, I can sometimes save myself a few cuts with the saw (see below).
What is actual length of 2x4x8?
Hence, what started out as a 2 x 4 now measures 1 1/2 inches x 3 1/2 inches....Actual Dimensions and Nominal Dimensions.Nominal MeasurementActual (inches)Actual (mm)2 x 41-1/2 x 3-1/238 x 892 x 61-1/2 x 5-1/238 x 1402 x 81-1/2 x 7-1/438 x 1842 x 101-1/2 x 9-1/438 x 2359 more rows•Mar 27, 2020
What size 2x4 was used in the 1940s?
During the late 1940s or early 1950s, builders in many areas of North America switched to planed 2x4s that measure 1.5" x 3.5".
What size bandsaw do I use to build a house in Vermont?
Here in rural Vermont, builders are still sometimes building new homes with rough-cut full-dimension 2x4s (or, more commonly, 2x6s) cut on a bandsaw mill. I built several homes like that in the 1980s.
When did round wire nails start?
The modern round wire nails began replacing square cut nails shortly before 1900. Between 1850 an 1870 sawmills retooled from up and down saws to circular saw. So check your rough sawn boards. Up and down saws leave straight lines nearly perpendicular to the board.
Can you tell the date of a building by sizing the wall studs?
Alan, Unfortunately there is no reliable way of fixing the date of a building by sizing the wall studs. You will have much better luck looking at the architectural style or, as most towns in Ontario have very good archives, checking for references to it or it's neighbours there.
When did the size of a 2x4 change?
Size standards, maximum moisture content, and nomenclature were agreed upon only as recently as 1964. The nominal 2x4 thus became the actual 1½ x 3½, imperceptibly, a fraction of an inch at a time. It was a 34 percent reduction in actual volume; as those in the trade would say, it's “selling air.”
What does a 2x6 mean?
Re: What is 2x4, 2x6 board? It's actually a little less than two inches once it's finished, but it started that way, yes. It's close to two inches thick and four or six inches wide.
Why is a 2x6 not 2x6?
The "nominal" cross-section dimensions of a piece of lumber, such as 2 X 4 or 1 X 6, are always somewhat larger than the actual, or dressed, dimensions. The reason is that dressed lumber has been surfaced or planed smooth on four sides (called S4S). The nominal measurement is made before the lumber is surfaced.
How big is a 2x4?
A 2x4 is actually 3-½ inches by 1-½ inches. Many of you know this, but why is this a thing? You don’t go to Subway and pay for a $5-footlong expecting to get 11 inches (although many of you will argue this is the case). And it’s not just a 2x4: A 1x4 is actually ¾ inches by 3-½ inches; a 4x4 is actually 3-½ inches by 3-½ inches.
What is a 2x4 lumber?
The most well-known piece of lumber is the 2x4, pronounced two-by-four. It’s mostly used in the framing of houses but you’ll also see it in just about any other construction or DIY project. But there is a caveat will calling a 2x4 a 2x4: It’s not really two inches by four inches as its name implies. A 2x4 is actually 3-½ inches by 1-½ inches.
Why is there a discrepancy in lumber size?
Put simply, the discrepancy in sizing comes from the need for the lumber industry to stay competitive with other market alternatives during times of scarcity.
What caused the shortage of wood in the lumber industry?
The demand for pallets and crates for the war caused a shortage in wood for the lumber industry. Builders began to use alternatives to wood such as concrete block and engineered products (like plywood). People in the forest industry were under immense pressure to figure out how to become more efficient and compete.
What are the actual dimensions of a 2x4?
Believe it or not, a 2x4 board does NOT measure 2" x 4"! The actual dimensions of a 2x4 are 1 ½" thick and 3 ½" wide. What?!? Why is a 2x4 not 2" x 4"?
Why is the size of a 2x4 shrinking?
Over time, the size of a 2x4 shrunk in order to compete with other building materials. Mills were trying to get more boards out of a single log, and charge the same price. Eventually, the actual size of a 2x4 was standardized at 1 1/2" x 3 1/2" to keep the dimensions consistent throughout the industry.
What does cupping mean on a 2x4 board?
If it's shaped like a potato chip, it's cupping! This is more common in wider boards, but it doesn't hurt to check. Once you have the best 2x4 lumber picked out, you can get it cut down into shorter lengths at the store to make it easier to get it home.
How long are 2x4 studs?
2x4 studs are typically 8 feet long, to match the standard length of a sheet of plywood or drywall. You can also find 2x4 studs that are 92 ⅝" long, which allows builders to account for the thickness of the boards that run along the top and bottom of the wall. Pay attention to the lengths listed on the lumber bin when buying 2x4s ...
What is a 2x4 stud?
2x4 studs are one of the cheapest and easiest sources of lumber for beginning woodworkers. But if you've never built anything before, there's a lot to learn! In this guide, I'll answer all your questions about the humble 2x4 and help you get started on your next project!
How to cut 2x4 without power tools?
If you want to cut a 2x4 without power tools, try a miter box with a hand saw. The slots in the box will help guide the saw to create a straight cut while you pull the teeth back and forth across the board. You can learn more about how to use a miter box here!
What is a cross cut on a 2x4?
A cross cut severs the fibers across the grain, making the 2x4 board shorter. This is the most common type of cut, and can be made with most saws. A rip cut slices down the length of the board with the grain. This makes a thinner board, and is commonly used to take off the rounded corners of standard 2x4 lumber.
What is the nominal size of a 2x8?
At least around here, anyway. Once you go up to x8 the dimensions are 3/4" under nominal, so a 2x8 or 1x8 is 7-1/4" and x10 is 9-1/4" etc...
What is the standard size for 4 sided planers?
Standardized machining, if all the 4 sided planers are using the same tooling it's cheaper so the standard is set at 1-1/2" x 3-1/2" etc. and most importantly 2. Standardized lift sizes for shipping. Ad an eight in both directions and suddenly you're shipping few units/load.