Because a nominal 2x4 board is really 1-1/2 inches by 3-1/2 inches. . Rough lumber cannot be less than than 1/8" (3.2mm) thicker or wider than the nominal finished thickness or width, except that 20% of a shipment cannot be less than 2/32" (2.4mm) thicker or wider. Actual Size. S= bh 2 /6 (in. Carpenters extensively use dimensional lumber in framing wooden buildings. 2021-04-23 by Bucky Did you know that 24 is not actually 2 inches by 4 inches. Bars optional on sizes: 2x4 through 8x10; Lumber Size (BXS) Actual Dimension. 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. Under 8 inches: subtract 0.50 in. When the board is first rough sawn from the log, it is a true 2x4, but the drying process and planing of the board reduce it to the finished 1.5x3.5 size. Ultimately, the reason reason wood varies from the advertised size is due to the shrinking that occurs during the drying process. Standard Lumber Dimensions Table Weight of Roofing Materials The Actual Size is the actual measured size of the lumber. S2S means "surfaced two sides," and . However, there is a difference between the nominal size (what the lumber is referred to) and the actual size. 8/4 means approximately 2 thick. Same Day Shipping! The actual measurements are the final size. Dimensional lumber is cut to a specific length, width, and depth. However, the actual dimensions of the wood are 3/4 inch x 1 1/2 inch and the nominal size is 12. size / dimensions: 14.25x14.25x1.25. Dimensional lumber refers to softwood lumber that has been milled on all sides to common sizes . Actual size: dimensions at time of manufacture prior to pressure treatment. This leads to cost reduction and customer satisfaction." See the table below: Joist Size Nominal Size; 26: 1-1/2 x 5-1/2: 28: 1-1/2 x 7-1/4: . Dimensional lumber is lumber that is cut to standardized width and depth, often specified in millimetres or inches. Related Lumber Wood Engineering Data: Structural Wood Lumber Engineering Properties 5" and Larger 2) Area. Dimensional Lumber Decking Planks Here are the basic rules to keep in mind: Under 2 inches: subtract 0.25 in. Weight Per Foot. 3) Section. NOTE: Each 4x4 and 6x6 post sleeve fits over a 4x4 pressure-treated post or equivalent post mount. (Actual photo measures: 8x8 inches). The most commonly available dimension lumber sizes are 24 through 212. Dimensional lumber boards made of American softwoods are the building blocks . If the nominal dimension is less than 2 inches, the actual size will be reduced by inch. The tables below provide both the nominal and actual lumber dimensions for many common North American lumber sizes. That means a 1 x 4 board is actually 3/4 inches by 3 1/2 inches. A 2x4 is not actually 2" x 4". The "nominal" lumber size refers to the label that is placed on the timber that you purchase. But there is a caveat will calling a 2x4 a 2x4: It's not really two inches by four inches as its name implies. Common sizes include 24 (pictured) (also two-by-four and other variants, such as four-by-two in Australia, New Zealand, and the UK), 26, and 44. The larger 1x boards (1x8, 1x10, etc.) 6 x 6 5.50 x 5.50 140 x 140. size (b h) (mm) Surfaced. (5.5 in x 5.5 in x 108 in or 139 mm x 139 mm x 274 cm external dimensions) COLORS. Boards are referred to by their "Nominal Size", not the actual size. The usual lengths are 8', 10', 12', 14', and 16'. And there you go, a 12-foot Sitka spruce 22 weighs 5.28 pounds. Which is shorter than the nominal size. The actual size of a 2x4 is 1 inches by 3 inches. Actual lumber is sawn, planed, and smoothed, and it's generally made ready for many applications. Maybe you've noticed that lumber sizes are often misleading. Sawn Lumber Dimensions. The reason is that dressed lumber has been surfaced or planed smooth on four sides (called S4S). Our White Oak Dimensional Lumber is cut to exact sizes lists. Lumber prices have come crashing down in a new sign of how rising interest rates are deflating markets that boomed during the pandemic. A nominal 2x4 board starts out 1.56 in. The tables below provide both the nominal and actual sizes so many common North American lumber sizes. You might have seen the frame softwood boards or framing lumber that is being sold at any local hardware store or lumber . Shipping Info. The actual, or "dressed" dimensions when finished are always slightly smaller. Shop dimensional lumber and a variety of building supplies products online at Lowes.com. In modern lumber practices, the boards are no longer exactly 2 x 4 inches when first cut, but today's drying and planing methods still leave the board 1 1/2 inches thick and 3 1/2 inches wide. General rule converting nominal to actual softwood dimensions subtract 1/4 inch for dimensions under 2 inches (51 mm) subtract 1/2 inch for dimensions under 8 inches (200 mm) subtract 3/4 inch for larger dimensions John's Lumber stocks superior quality lumber ensuring the outcome of your project, be it a new home, an addition to your existing home, or a few shelves in the basement, rest assured John's has just the right lumber for your needs. To learn more about lumber dimensions for all sizes of boards, posts, beams, etc., see the American Softwood Lumber Standard. Here are the basic rules to keep in mind: Under 2 inches: subtract 0.25 in. Find My Store. A typical dimensional lumber designation might read as such: "2 in. Step 6 : Multiply the weight of the one foot section by the length of the board. Dimension lumber is solid sawn wood that is less than 89 mm (3.5 in) in thickness. Thicknesses apply to their corresponding . x 4 in. x 3-1/2 in. The law requires workshops to use the exact standard measurements for dimensional lumber so that consumers know what actual size they need when purchasing. The actual size of dimensional lumber is determined by using a tape measure or straight edge to measure the dimensions of the wood. We recognize such "sizes" as 2x4, 2x6, 4x4, 1x2, etc. Most lumber is sold in "nominal" (in name only) sizes such as 13, 24, 44 and2x2 lumber. During the finishing phase (includes drying and planing the board) the 2x4 has been reduced to 1.5" x 3.5". However, there is a difference between the nominal size (what the lumber is referred to) and the actual size. As stated earlier, their actual sizes are 1 1/2 inches and 3 1/2 inches. For anyone not in the lumber and construction industry, this can be confusing. Ready to be hung, weighs less than 1 pound! 1" x 5 1/2" 1" x 5.5" 1.78. n/a. A 2x4 is actually 3- inches by 1- . The chart below shows the actual dimensions of lumber when it is dry (when wet, it will be slightly larger). Modulus. This number indicates the size the wood was originally cut to. A 24 has been called a "2 by 4" since, wellforever. These pieces are NOT nominal widths. Surfaced. In the United States, common dimensional lumber sizes include 2 inches x 4 inches and 2 x 6 inches. 2-in x 8-in x 10-ft Southern Yellow . The difference between nominal and actual lumber is the thickness and width of a lumber board. S= bh 2 /6. Choose from maple (regular and curly), cherry, purpleheart, bubinga, poplar, walnut, padauk, cedar, basswood, canarywood and about 40 more species! The Difference Between Nominal and Actual Sizes. x 3.58 in. This is because lumber is surfaced or planed smooth on four sides (S4S). If your project calls for precise measurements, be sure to check your lumber before purchasing. But these sizes are not the actual 13 dimensions, 24 dimensions, 26 dimensions, 28 dimensions and 44 dimensions of the wood. Wood. Dimensional lumber actual size - Why the confusion? Here are the common sizes of lumber, and their actual sizes. Actual dimensions may vary slightly between grades. Construction softwood lumber is categorized into three different types based on nominal thickness: Boards: Less than 2" thick. Updated June 29, 2020 1x Board Sizes 1x4 and 1x6 boards lose 1/4 inch in thickness and 1/2 inch in width before leaving the mill. That means a 1x10 is actually 3/4 inch in thickness by 9 1/4 inches. Nominal Dimension. It's mostly used in the framing of houses but you'll also see it in just about any other construction or DIY project. Keep in mind that the size changes based on the width or thickness. . A 2x4, for example, is actually a. Depending on a variety of factors including lumber type, lumberyards will cut timber to various sizes and leave them out in the air to dry. For example: What are 28 actual dimensions? 4/4, 4/8. * We can ship it in lengths up to 8 feet. Product dimensions will vary depending on moisture content. AC2 2 x 14 x 16' Ground Contact Green Pressure Treated Lumber (Actual Size 1-1/2" x 13-1/4" x 16') Model Number: 1112019 Menards SKU: 1112019 Final Price: $135.49 . 5/4 means approximately 1-1/4 thick. etc. Here are the general rules that you can use to calculate softwood (SYP) dimensions. As you can see from the lumber dimensions chart above, there is a bigger difference between the nominal and actual size of larger lumber pieces. The same is the case for 14, 24 and 44, etc. In the case of a two-by-four, industry standards require the finished board to be 1.5 inches by 3.5 inches). 5-1/2. Hardwood lumber dimensional sizes are indicated below: 1 inch = 25.4 mm 1) S1S - Surfaced one Side 2) S2S - Surfaced two Sides Common Hardwood Species Oak Walnut Basswood Beech Birch Butternut Chestnut Cherry Elm Gum Hickory Maple Mahogany Yellow Poplar Hardwood Grades FAS - First and Second best grade - required for a natural or stained finish 6/4 means approximately 1-1/2 thick. Larger sizes may take longer to create as they are created on customer demand. 28 actual size. Modulus. The nominal measurements are a board's size before it has been planed smooth (surfaced) on all 4 sides. Prices, . Over 8 inches: subtract 0.75 in. 8 inches or greater. In some of the larger timbers, like the 2x8's, 2x10's, and 2x12's, we also stock longer lengths (some up to 24'), since these are often used as rafters or for floor joists, where longer is usually better. GRADE THICKNESS . It is truly one of the most versatile species of hardwood available and is routinely . 3-1/2. The true measurement of a 2x4 is actually about 1.5 x 3.5. Dimensional Lumber Sizes: Nominal vs. Actual . The sizes presented are based on commercially available lumber within the USA, so the data shown is in Imperial (Inches) units. This standard lists the nominal and minimum dressed sizes for all categories of structural and nonstructural lumber. As you can see from the lumber dimensions chart above, there is a bigger difference between the nominal and actual size of larger lumber pieces. 23 lumber actual size Written by Woodworking Team in Wood blog The actual size of 23 lumbe r is around 1 x 2 12. Dimensional lumber has been the building material of choice for centuries. The first two numbers (2 inches and 4 inches) are nominal widths and depths for the lumber. Though the nominal size of a 23 lumber is incorrect when measured, it's still referred to as 2-by-3 lumber in local hardware stores. (1) Dimension Lumber 2 thick and less than 14 wide is required to be dry with a moisture content of 19% or less. Actual (true) size 8x8 post caps will fit wood posts that are between 8" x 8" and 8. Board Foot A volume measurement of lumber, 1 board foot is equal to 144 cubic inches, to calculate multiply width in inches Take a piece of lumber that is 1.00 inch thick x 5.51 inches wide x 12.00 feet long. 1x Lumber Dimensions Nominal Size Actual Size 1x4 3/4 x 3-1/2 1x6 3/4 x 5-1/2 . Framed and double matted. We have seen a great reduction in checking as well as an overall improvement in product appearance. The nominal measurement is made before the lumber is surfaced. Commercial lumber dimensions - American Softwood Lumber Standards - nominal and actual sizes are indicated in the table below. Lumber > Timbers > Timber Sizes. The entire wood industry uses what is known as nominal sizes. size (b h) (in.) 6"x6" - Available only in Classic White. l= bh 3 /12 . The length of a 24 board can range from 6 to 24 feet. Manager, 84 Lumber, Rozzelles Ferry Road, Charlotte, NC. Under 8 inches: subtract 0.50 in. Max Length. Dimension Lumber grades are divided into the following classifications: (2x2 through 4x4, used where high-strength design values are required in light framing sizes, such as in engineered wood trusses.) Typically, the actual thickness of a wood board is 75% of the nominal thickness and the actual width of a wood board is around 85-95% of the width of the board. Nominal. Select 5/46 inch deck boards to fasten in a perpendicular pattern to joists spaced 12" or 16" on-center (OC), or diagonally on 12" OC joists. 2-in x 8-in x 14-ft Southern Yellow Pine S4S Kiln-dried Lumber Model #2P020814S4 1439 Actual Dimensions: 1.5-in x 7.25-in x 14-ft Wood Species: Dressing:. 10 3 mm 3: Moment. The two numbers used to describe a piece of dimensional lumbersay, a 24, refer to its standardized width and depth: 2 inches by 4 inches (though those aren't the actual dimensionsmore about that later). The following is a table describing common lumber sizes, and their actual sizes and weights (assuming the wood weighs . Measures: 14.25x14.25x1.25 inches. Over 8 inches: subtract 0.75 in. QR Code Link to This Post. 140. In reality, these measurements are not a true measurement of the lumber thickness or width. Actual size will be smaller than listed nominal size do to loss of material when run through planer. 4"x4" - Charcoal Black, Classic White, Gravel Path, Rope Swing, Vintage Lantern. 2x Board Sizes 6" x 6" x 108". 8 x 8 7.25 x 7.25 184 x 184. 0.44 pounds is the weight of a one foot section of 22 lumber made from Sitka spruce. Now look at a piece that is 1.24 inches thick x 6.49 inches wide and 12.99 feet long. The numbers given for the size of a piece of lumber when you buy it at the store are nominal lumber sizes or measurements. Free quotes of all work. . Woodworkers need to be aware that the source and processing method of their lumber will impact the actual dimensions of the boards. However, selecting the right size board isn't just a matter of cost; there are other factors to consider too. Some lumber might be sold in odd sizes such as 7 or 9 feet, but it is rare and might be available just from certain lumber retailers. Section Properties of Dimension Western Lumber Sizes: Nominal. It's also the most common lumber for building as it's ready to use and universally consistent in sizing. When the board is first rough sawn from . Here are the general "rules" for calculating softwood dimensions: Nominal vs Actual Dimension Rules. So the "nominal" name 2 x 4 is used to easily reference a commonly used piece of lumber, but the actual or "dressed" dimension of a 2 x 4 is 1 1/2 x 3 1/2. 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