A piece of 1 x 4 pine for example actually measures 3 4 inch thick and 3 1 2 inch wide while a 2 x 4 framing stud is actually about For example if you see 2 x 4 tag and you ll measure the actual size of the wood its 1 x 3 . What does 1 8 mean

Voluntary Product Standard PS 20-05 American Softwood Lumber Standard.

Woodworking The actual measurements are the final size. The term dimensional lumber came into popular use around the beginning of the 20th century to distinguish lumber cut to pre-determined sizes from other types of wood such as corded wood for fireplaces.During this period the building industry sought to control costs and minimize waste by developing standard sizes and grades for building timber. All data is in imperial units Inches . Updated June 29 2020. 1x4 and 1x6 boards lose 1 4 inch in thickness and 1 2 inch in width before leaving the mill. Originally 2 4 is cut exactly as 2 4 but after the wood is dried it shrinks in size. Start by cutting an end to remove any end checks. Dimension lumber can be purchased as dry or The nominal measurements are a board s size before it has been planed smooth surfaced on all 4 sides. Logically 1 2 would mean the wood is 1 inch x 2 inches right I cut successive 1 chunks off an end until the last cut off piece can t be broken when flexed by hand.

The difference has to do with the sawmill If your project calls for precise measurements be sure to check your lumber before purchasing. Dimensional lumber is cut to a specific length width and depth. Once the first end in good then cut the piece s rough length 1 longer than its finished length. 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. However there is a difference between the nominal size what the lumber is referred to and the actual size. If you are new to buying softwood and hardwood lumber for craft projects or home improvement work one of the first things you notice is that the dimensions by which the wood is sold called the nominal measurements are not the same as the actual measurements. The tables below provide both the nominal and actual sizes so many common North American lumber sizes. And when I first started learning about woodworking I didn t know what they meant either. Commercial Lumber Sizes Chart Table. When you purchase lumber from the store you ll notice that the actual wood dimensions are slightly smaller then what s on the tag.

That means a 1 x 4 board is actually 3 4 inches by 3 1 2 inches. Let s Size Some Wood 1 Rough crosscut your rough lumber. 2x4s are not actually 2 inches by 4 inches. How wide is 1 2 lumber Mechanical Tolerance Variations of Lumber Per. Here are the common sizes of lumber and their actual sizes. The following data is standard reference and size data for commercially available lumber within the USA. Dimensional Lumber and Modern Building . However the actual dimensions of the wood are 3 4 inch x 1 1 2 inch and the nominal size is 1 2. Lumber sizes are usually given in nominal measurements.

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