The actual dimensions of a modern 2x4 is 1.75 by 3.5 inches.
A 2X6 is 5 1/2 inches wide. Incidentally it's 1 1/2 inches thick. Pre-WWII lumber was cut at stated dimensions, a 2x4 was actually 2 inches by 4 inches.
On paper = 2 dimensions Physical = 3 dimensions Examples: a square is 2 dimensions and a cube is 3 dimensions a circle is 2 dimensions and a ball is 3 dimensions
A ray can be in 2 dimensions, in 3 dimensions, or in fact in any number of dimensions.
2-D means 2 dimensions.
1 1/2 in. subtract 1/2 inch
The 2x4's I use measure 1 and a half by 3 and a half.
Is good whenever there is the potential for water/rot/insect problems.
Ah, the humble 2x4! Well, you see, a 2x4 piece of lumber actually measures 1.5 inches by 3.5 inches in size. It's like a little piece of nature's canvas, ready for you to create something beautiful with it. Just imagine all the wonderful things you can build with such a simple and versatile piece of wood.
The board-foot is a specialized unit of measure for the volume of lumber in the United States and Canada. It is the volume of a one-foot length of a board one foot wide and one inch thick.Board-foot can be abbreviated FBM (for "foot, board measure"), BDFT, or BF. Thousand board-feet can be abbreviated as MFBM, MBFT or MBF.In Australia and New Zealand the term super foot or superficial foot was used to mean the same.[1][2][3]One board-foot equals:1 ft × 1 ft × 1 in12 in × 12 in × 1 in30.48 cm x 30.48 cm x 2.54 cm144 in³1⁄12 ft³2360 cm³2.360 liters0.002360 cubic meters or steresBoard foot is the unit of measure for rough lumber (before drying and planing with no adjustments) or planed/surfaced lumber. An example of planed lumber is softwood 2x4 lumber one would buy at a large lumber retailer. The 2x4 is actually only 1+1⁄2 × 3+1⁄2 in (38 × 89 mm) but the board footage for the lumber when purchased wholesale could still be represented as full 2x4 lumber, although the "standard" can vary between vendors. This means that nominal lumber includes air space around the physical board when calculating board feet in some situations, while the true measurement of "board feet" should be limited to the actual dimensions of the board.For planed lumber, board-feet refer to the nominal thickness and width of lumber, calculated in principle on its size before drying and planing. Actual length is used.See dimensional lumber for a full discussion of the relationship of actual and nominal dimensions. Briefly, for softwoods, to convert nominal to actual, subtract ¼ inch for dimensions under 2 inches (51 mm); subtract ½ inch for dimensions under 8 inches (203 mm); and subtract ¾ inch for larger measurements. The system is more complicated for hardwoods.An Essex table is a tabulation of the number of board feet in lumber of varying dimensions.[4]
http://www.brownlumberservice.com/PDF/lumberweight.pdf
The actual dimensions of a modern 2x4 is 1.75 by 3.5 inches.
The **"actual size"** refers to the true, precise dimensions of a product or material after manufacturing, while the **"nominal size"** is the label or standard size used for identification and may differ slightly from the actual size due to trimming or finishing processes. For example, a 2x4 piece of lumber has a nominal size of 2 inches by 4 inches, but its actual size is typically 1.5 inches by 3.5 inches.
There are four different types of framing lumber. The common framing lumber are Spruce-Pine-Fir, Structural Southern Yellow Pine, Machine Stress Rated Lumber, Treated Southern Yellow Pine #2 and Better, and Bluwood.
A 2 by 4 (lumber) will have a weight based on the density of the wood. Pine, fir, redwood, treated or untreated will have different densities.
NEVER burn lumber in a fireplace. its been treated with chemicals and preservatives you dont want to breathe!
A 2X6 is 5 1/2 inches wide. Incidentally it's 1 1/2 inches thick. Pre-WWII lumber was cut at stated dimensions, a 2x4 was actually 2 inches by 4 inches.