When did 2×4 dimensions change?
This pressured further compromise because thinner 2x4s were a way to compete in price with wood alternatives. Size standards, maximum moisture content, and nomenclature were agreed upon only as recently as 1964. The nominal 2×4 thus became the actual 1½ x 3½, imperceptibly, a fraction of an inch at a time.
Why have 2×4 gotten smaller?
The simple reason why 2×4 is not 2 inches by 4 inches is that lumber mills trim off rough or warped surfaces of a 2×4 to give it a more polished and finished look. By planning the lumber on all four sides, the original 2×4 is now reduced to 1 ½ inches by 3 1/2 inches.
Why is dimensional lumber not actual size?
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. The reason is that dressed lumber has been surfaced or planed smooth on four sides (called S4S). The nominal measurement is made before the lumber is surfaced.
How did a 2×4 become 1.5×3 5?
The 2×4 refers to the rough-cut green wood: it shrinks during drying, then the dried wood is planed smooth, so the finished lumber is supposed to end up at 1.5″x3. 5″. While it doesn’t really shrink that much, the mills get more usable finished 2×4’s from a given tree if they cut them slightly smaller to begin with.
Why is a 2×4 not really 2×4?
DIMENSIONAL LUMBER: In the past, when a timber was called a 2×4 [or “two-by-four”], it actually measured 2 inches by 4 inches. Because of this extra milling, a 2×4 no longer measures a full 2 inches by four inches. Instead, a 2×4 is really only 1 1/2″ by 3 1/2″.
Does the size of a 2×4 change?
Without the rough edges, what went in as a 2-by-4 planks of rough-sawn wood is now a tongue-tripping 1.5-by-3.5, having lost approximately ¼-inch on all sides to the planer and drying processes. “Once upon a time, 2-by-4s really were 2 inches by 4 inches,” Stephens says.
Why is lumber smaller than the size it says?
Typically, that rough cut is smaller than the nominal dimensions because modern technology makes it possible to use the logs more efficiently. For example, a “2×4” board historically started out as a green, rough board actually 2 by 4 inches (51 mm × 102 mm).
What does a 2×4 actually measure?
The true measurement of a 2×4 is actually about 1.5×3. 5. When the board is first rough sawn from the log, it is a true 2×4, but the drying process and planning of the board reduce it to the finished 1.5×3. 5 size.
What does it mean to be called a 2 by 4?
Frequency: A length of lumber that is 2 inches thick and 4 inches wide, or that is trimmed to slightly smaller dimensions.
When did lumber dimensions change from actual to nominal?
Early concepts called for rough lumber to be of full nominal size, often in the dry condition. After World War I, the increasing demand for construction lumber led to the first national size standard in 1924. This was revised in 1926, 1928, 1939, and 1953, while still another revision is proposed for adoption in 1964.
Why are 2×6 not 2×6?
It’s lumber that is “dressed” is when it looses it’s actual size. And that’s not including the heat treating and/or kiln drying processes too. In short, 2×6 are referred to as 2×6 because it’s easier to say and understood throughout the industry that we are only referring to its nominal dimensions vs its actual.
Are 2x4x8 actually 8 feet long?
2×4 – 8′ Lengths Although not quite as common as the pre-cut studs I described above, my local Home Depot has a fairly good selection of 2x4s that measure 8 feet (96”).
What do they call a 2×4 in Europe?
I cant speak for the hole of europe, but at least in Norway a “2×4″ is 48×98 mm. If you go to a lumberyard, you buy 48×98 as everything is measured in metric, but in the daily speach most people still use the term 2×4, 2×8 aso. The Inch measurement is in use as long as we speak about size on TV(40″) and cartyres (15”).
Why is a 4×4 actually 3.5×3 5?
no, it is just a bit over 3.5″x3. 5″ for clearance. 2×4 and 4×4 boards are no longer the actual number, but as you state–they are 1/2″ LESS. the base fits nicely to a standard 4×4.
How much will a 2×4 shrink?
While the 8′ length won’t change much as the wood dries, the 2″ width and 4″ height (cross-section of the grain) will shrink considerably. Because of this shrinkage, a typical 2×4 will usually measure out to around 1-1/2″ x 3-1/2″.