The timber sizes detailed here are UK standard sizes. The lengths are an approximation of the old Imperial sizes in feet, hence the 300mm increments. Dimensional lumber is a term used for lumber that is finished - planed and cut - to a. The Timber Merchant, in general won't stock the smaller sizes and will prefer to sell the longer lengths. Commercial softwood lumber dimension chart - nominal and actual sizes. Lumber Dimensions: Nominal vs Actual NOMINAL SIZE (INCHES), ACTUAL SIZE (INCHES), ACTUAL SIZE (MM). The tables below provide both the nominal and actual lumber dimensions for many common North American lumber sizes. Here is a convenient chart of nominal dimension lumber sizes and their actual dimensions: Nominal Measurement. However, there is a difference between the nominal size (what the lumber is referred to) and the actual size. When the board is first rough sawn from the log, it is a true 2×4. The likes of B and Q, Homebase, Wikes will have a small selection of sizes but a good builders merchant will have a better selection and Timber Merchants is preferable. Dimensional lumber is cut to a specific length, width, and depth. 2x4s are not actually 2 inches by 4 inches. You can also use a Planer Thicknesser to straighten up faults in timber If you can't find the exact sizes you need then it might be time to invest in a planer/thicknesser. It's also worth noting the moisture content of timber affects the dimensions The sizes are based imperial inch dimensions 2”x4” becoming 50 x 100mm. Actual lumber is sawn, planed, and smoothed, and it’s generally made ready for many applications. Before 1895, no standards existed for the grading and sizing of lumber, though two inches had evolved over time as the most common rough thickness for. We deal with it because its an industry standard. Actual lumber sizes are pieces of lumber that are cut to standard sizes and refers to depth and width, but not length. Ahh, the ancient battle between nominal and actual lumber sizing. The chart shows some of the differences I've come across. In reality, a 2×4 actual size measures 1-1/2 inches by 3-1/2 inches. ) D Outside diameter of round HSS (in. What are the Actual Finished sizes of PSE or PAR Timber?Īfter much trawling and measuring I've determined the finished timber sizes will be approximately: 2 Dimensions and Section Properties of Round HSS 6 Dimensions and Section Properties of Square HSS 10 Dimensions and Section Properties of Rectangular HSS b Nominal width minus 3 times the design wall thickness, t (in.) C Torsional shear constant of 3cross-section (in. Don’t forget PSE / PAR is planed down from these sizes and will be 3 to 5mm smaller AND not all these sizes are available all the time, everywhere.
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