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The board foot or board-foot is a unit of measurement for the volume of lumber in the United States and Canada [1].It equals the volume of a board that is one foot (30.5 cm) in length, one foot in width, and one inch (2.54 cm) in thickness, or exactly 2.359 737 216 liters.
The edge crush test is a laboratory test method that is used to measure the cross-direction crushing of a sample of corrugated board.It gives information on the ability of a particular board construction to resist crushing.
Wood cut from Victorian Eucalyptus regnans The harbor of Bellingham, Washington, filled with logs, 1972. Lumber is wood that has been processed into uniform and useful sizes (dimensional lumber), including beams and planks or boards.
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Designed experiments with full factorial design (left), response surface with second-degree polynomial (right) In statistics, a full factorial experiment investigates how multiple factors influence a specific outcome, called the response variable.
A small amount of this data is then used to calculate two monthly index figures, the Construction Cost Index and the Building Cost Index. Both indexes are calculated using a formula made up of fixed amounts of four components—Portland cement, 2x4 lumber, structural steel (steel beams), and labor.
This is because a wall with 2x4 wood stud framing spaced 16 inches develops significant resonances which are not mitigated by the cavity insulation. In contrast, adding standard fiberglass insulation to an otherwise empty cavity in light-gauge (25-gauge or lighter) steel stud partitions can result in a nearly 10 STC-point improvement.
Albert J. Swanson invented the "A" Speed Square in 1925 as a carpenter's layout tool. He later founded the Swanson Tool Company to mass produce his invention. [3] Today, the Swanson Tool Company still manufactures and distributes the Speed Square and other carpentry tools from its headquarters in Frankfort, Illinois.