Why????
Question:why do thay call a 2x4 a 2x4 when its really a 1x3 dont make much sence
Answers:
Because " Back In The Old Days" it really did measure 2 X 4.the name was not changed just to maintain the old standards and avoid confusion.
Because it was a 2 x 4 before the shrinkage. If they measured wood after shrinkage, it could be off one way or another.
A drywall add half an inch on each side of stud.
They DID used to be that exact size, but it is actually 1 1/2 X 3 1/2 for a very long time now.
Guess what. 4X8 ply isn't always that size either!
When a 2X4 is cut at the sawmill, it actually IS a rough cut 2X4. After planing to make it smooth and kiln drying removes most of the moisture from it the board ends up 1 1/2 X 3 1/2.
If you look at an old 2X4 that actually measures @ 2X4, you will notice that it is rough, with the saw marks still evident. People prefer to work with planed lumber- at least I do.
Interestingly, if a board's saw cuts are straight, it dates to about the 1870, when mills changed from beam saws to circular blades.
The wood is cut to 2" x 4", as it dries it shrinks...usually only about 1/4" per side. If your 2x4 measures 1x3, you are getting ripped off.
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