#2x10 actual size full

Rafter Spacing, Center to Center, OC (inches) Live Load 20 lbs/ft2 (956 N/m2) Maximum Span (ft – in) This was revised in 1926, 1928, 1939, and 1953, while still another revision is proposed for adoption in 1964. After World War I, the increasing demand for construction lumber led to the first national size standard in 1924.

#2x10 actual size full

When did lumber dimensions change from actual to nominal?Įarly concepts called for rough lumber to be of full nominal size, often in the dry condition. The length of the boards is generally exactly what you order, though we usually only stock pieces of even lengths. In this case, the planing is necessary for a smoother surface, so that the board could be used for interior applications. If your project calls for precise measurements, be sure to check your lumber before purchasing.Ī 1×6, for example, actually measures 3/4″ x 5 1/2″. The actual measurements are the final size. The nominal measurements are a board’s size before it has been planed smooth (surfaced) on all 4 sides. What is the difference between nominal and actual sizes in lumber? The nominal measurement is made before the lumber is surfaced. The reason is that dressed lumber has been surfaced or planed smooth on four sides (called S4S). 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. Why is dimensional lumber not actual size?

How wide is a 2 x10 board?Ĭommon Dimensional Lumber Sizes Dimensional Lumber: Nominal Size vs. That means a 2×10 is actually 1 1/2 inch in thickness by 9 1/4 inches. What is the actual size of 2×10 pressure treated?Ģx Board Sizes The larger 2x boards (2×8, 2×10, etc.) lose 3/4 inch in width.