![]() ![]() ![]() A summary of the six published design values?including bending (Fb), shear parallel to grain (Fv), compression perpendicular to grain (Fc-perp), compression parallel to grain (Fc), tension parallel to grain (Ft), and modulus of elasticity (E and Emin) can be found in Structural Properties and Performance published by WoodWorks.Ĭanada has grading rules that maintain a standard among mills manufacturing similar woods to assure customers of uniform quality. Design Values for Wood Construction, which is a supplement to the ANSI/AF&PA National Design Specification? for Wood Construction, provides these lumber design values, which are recognized by the model building codes. The applicable standards are based on results of tests conducted in cooperation with the USDA Forest Products Laboratory. Current standards are set by the American Lumber Standard Committee, appointed by the Secretary of Commerce.ĭesign values for most species and grades of visually graded structural products are determined in accordance with ASTM standards, which consider the effect of strength reducing characteristics, load duration, safety and other influencing factors. These standards have changed over the years to meet the changing needs of manufacturers and distributors, with the goal of keeping lumber competitive with other construction products. The move to set national standards for lumber in the United States began with publication of the American Lumber Standard in 1924, which set specifications for lumber dimensions, grade, and moisture content it also developed inspection and accreditation programs. Therefore, they vary considerably in strength, utility and value. Individual pieces of lumber exhibit a wide range in quality and appearance with respect to knots, slope of grain, shakes and other natural characteristics. Structural Wood Lumber Engineering Properties | Modulus of Elasticity of Wood | Wood Engineering Design Data.Keep in mind that this chart is for softwood dimensional lumber sizes (not hardwoods) which are very common and mainly what I use for my woodworking projects.Ĭlick here for a free printable PDF version that you can easily print and hang up in your workshop, office, or other handy place! *If you have already subscribed, you can find this printable in the Free Printable Library.Structural Wood Lumber Engineering Properties 5" and Larger ![]() I decided to put together the below handy chart of actual lumber sizes for any new DIYers who are just learning about woodworking and how to build and also as a quick reference for myself and anyone else that needs to figure out building measurements. The difference has to do with the sawmill process and shrinkage of the wood. Logically, 1×2 would mean the wood is 1 inch x 2 inches right? However, the actual dimensions of the wood are 3/4 inch x 1 1/2 inch and the nominal size is 1×2. What does 1×8 mean? How wide is 1×2 lumber? And when I first started learning about woodworking I didn’t know what they meant either. I’ve received some questions from readers about what those lumber sizes actually mean. On all of my building tutorials, I list out the wood sizes that are needed for the DIY project under the materials needed.
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