Best to research your local dimensions and always carry a measuring stick. If a third number is added onto the nominal dimensions, such as 2 x 4 x 96, it indicates the length of the wood. Every country is different, every country has its own standards and what it accepts as deviance from nominal. The typical nominal dimensions for wood, such as 2 x 4, refer to the thickness and the width of the wood. The original was designed for softwood.įor a more internationally-relevant guide to nominal/actual timber sizes, in imperial and metric: forget it. I used 6x2 and 4x4 and 8x2, as per the plans, but I could have used 4x1, 8x1 and 6x1 as the damned stuff is so strong. When did 2x4s Stop Being 2×4 The answer to this question is not entirely clear, but it seems that 2x4s stopped being two inches by four inches sometime in the late 20th century. It is a common size of lumber used in construction. It came out really nice - but it weighs about 100kg. A 2×4 is a board that is two inches by four inches. I made a replica of a park bench from the gardens in Melbourne, Australia. And it's not only the size which presents problems when designing.Īll our timber is tropical hardwood, so building things based on plans from Europe, the US/Canada can be fun. I carry a pocket-sized sliding gauge whenever I go timber shopping. Here in the tropical third world, 'officially' finished size 4x2 is 4" x 2" - as is rough sawn - but you are never sure.
Planed/finished dimensions are significantly smaller: 25 - 20, 40-35, 50-45, 100-90, 75-65.Īn NZ 4x2 (100x50) is 90x45 finished size, in the US it's 3.5x1.5 or 88x38 - significantly smaller than the NZ size '4x2'Ī UK 4x2 is 95x44 - so marginally different to the NZ one, but still a significant difference to the US size. Our rough-sawn dimensions (saying NZ, although I don't currently live there) are: I have some fittings designed for US 4x2, bought from a US retailer, the dimensions are a good 10mm smaller than our dressed 4x2 in NZ. US 4x2 is a very different size to Australian 4x2 or British 4x2 or NZ 4x2 or Malaysian 4x2.
Once the lumber is planned to actual size, then the edges are rounded to.
By planning the lumber on all four sides, the original 2×4 is now reduced to 1 inches by 3 1/2 inches. Click to expand.It depends which country you are in. In the late 1970’s today’s standard sized 1-1/2 x 3-1/2 dry 2×4 was created. 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.
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