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That side is the short side for B0, B2, B4, etc., and the long side for B1, B3, B5, etc. There are 11 sizes in the A series, designated A0–A10, all of which have an aspect ratio of a b = 2 ≈ 1.41421 …. Ī series A size chart illustrating the ISO A series The following international paper sizes are included in Cascading Style Sheets (CSS): A3, A4, A5, B4, B5. There are different series, as well as several extensions.
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ISO paper sizes are all based on a single aspect ratio of the square root of 2, or approximately 1:1.41421. Each ISO paper size is one half of the area of the next larger size in the same series. It is based on the German DIN 476 standard for paper sizes. The international paper size standard is ISO 216. Of course, lengths are customized for each job.See Switching costs, Network effects and Standardization for possible reasons for differing regional adoption rates of the ISO standard sizes. A wide range of depths are available, far too many to list here, so please contact your local manufacturer for more information on their offerings - in general depths start at 6" and go up to 30" and beyond. Standard widths are specified in the above publication, but can be customized as needed. The following table comes from the American Institute of Timber Construction's Standard Specification for Structural Glued Laminated Timber of Hardwood Species publication.ĪNSI/AITC A190.1-1992 allows for any width and depth of glue laminated timber. It is advisable to check with your contractor or lumber supplier before finalizing design details so you aren't surprised by what you receive. However, in some cases, like the big-box hardware stores, the boards come in dimensional widths similar to softwood widths. In most cases, hardwood boards come in random widths to be ripped to size by the woodworker. For instance, hardwood trim that ends up being just over 1" thick (surfaced on 2 sides) is called a five-quarter (5/4) board. In North America, hardwood lumber is usually specified using the quarter system, where a board is identified by its thickness in quarters of an inch. Surfaced refers to a finishing process that smooths the lumber to remove all saw marks. Hardwood lumber is sized based on how many sides are surfaced. According to NIST Publication P20, actual lengths must be at least equal to the nominal length, but can be up to 3" longer than the nominal length. Softwood lumber comes in a number of standard lengths as listed in the table below. North American Standard 8-by Timber (Surfaced 4 Sides, S4S) NOMINAL SIZE (INCHES) North American Standard 6-by Timber (Surfaced 4 Sides, S4S) NOMINAL SIZE (INCHES) a nominal 8x8 timber has a minimum finished size of 7.25" x 7.25"), most timbers over 7" are finished with 1/2" removed. While NIST Publication PS20 indicates that nominal 7" to 15" thick timbers should have 3/4" removed for a finished dimension (e.g. Softwood lumber that has a thickness over 5" is called timber. North American Standard 4-by Lumber NOMINAL SIZE (INCHES) North American Standard 2-by Lumber NOMINAL SIZE (INCHES) North American Standard 1-by Lumber NOMINAL SIZE (INCHES) In the United States, softwood lumber is governed by the National Institute of Standards American Softwood Lumber Standard (PS 20). Softwood lumber is generally used for framing walls and floors.