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Two times two is four. If you mean lumber, it is a piece of wood that is about 1-3/4" by 1-3/4".
A 2 x 4 is piece of lumber typically used in framing houses. A 2 x 4 actually measures 1-1/2" x 3-1/2" - as the wood dries it shrinks until it reaches this nominal size. Typically lengths for 2x4s are 8' and 12'. This lumber is typically made from a soft wood, like pine. When used as the verticals of framed walls, they are called "studs".
1 1/2"x 5 1/2"
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There are different sizes when framing lumber. The most common size of framing lumber is 2 by 4.
http://www.brownlumberservice.com/PDF/lumberweight.pdf
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Two times two is four. If you mean lumber, it is a piece of wood that is about 1-3/4" by 1-3/4".
Is good whenever there is the potential for water/rot/insect problems.
A 2 x 4 is the most common size stud. Some people will use 2 x 6 lumber to increase insulation values or when your walls get over 10" in height.
In the USA: 2" X 4" and 2" X 6". In, say, Germany or Austria it is 10 cm X 10 cm (approx 4" X 4"). ;-)
It is not a standard finished commodity lumber size. Most likely the member you are looking at is a 2x8, which measures 1-1/2" x 7-1/4".
It depends upon the species as weights can very greatly, even among softwoods, such as pine, fir, or especially cedar or cypress. Additionally, moisture content and treatments can impact the finished weight. Southern Yellow pine, fresh cut varys from 36 lbs/cubic foot (20% moisture) to 53 lbs/cubic foot for fresh cut (green). Pressure treating also adds additional moisture, thus weight. If the lumber is from a lumber yard, not treated, kiln dried, dimensional pine lumber would typically weigh 37 lbs / cubic foot, so a 16' 2 x 4, actually 16' 1.5" x 3.5" would be: 1.5 X 3.5 X 192 = 1008 cubic inches 1728 cubic inches in a cubic foot so: 1008 / 1728 = 0. 583 cubic feet weight of pine = 37 lbs/cubic foot X 0.583 = 21.58 lbs for a 16' 2" x 4". or 1 1/2" = 0.125 cubic feet 3 1/2" = 0.292 cubic feet .125 X .292 X 16 = 0.583
We went to the lumber yard to pick up some 2 x 4s.
A 2 x 4 is piece of lumber typically used in framing houses. A 2 x 4 actually measures 1-1/2" x 3-1/2" - as the wood dries it shrinks until it reaches this nominal size. Typically lengths for 2x4s are 8' and 12'. This lumber is typically made from a soft wood, like pine. When used as the verticals of framed walls, they are called "studs".