wft = nominal lumber width (ft)
win = nominal lumber width (in)
t = nominal lumber thickness (in)
L = nominal lumber length (ft)
Note the use of inches vs. feet.
Default values for a piece of lumber with dimensions 2" x 4" x 6'.
The board feet for lumber 3 inches thick, 2 inches wide and 12 ft long - can be calculated as
BF = (3 in) (2 in) (12 ft) / 12
= 6 board feet
- as indicated in the table above.
Engineering related topics like Beaufort Wind Scale, CE-marking, drawing standards and more.
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Resistance, voltage and current in electrical parallel circuits.
Common sizing of glue-laminated timber.
Species of hardwood vs. softwood.
Sizing of hardwood lumber.
Lumber and surface finishing abbreviations.
Weights of green, kiln dried and pressure treated lumber boards.
No. 1 and No. 2 Grade of Douglas fir and maximum span floor joists - imperial units
Calculate miter saw protractor angles for skirting and decorative mouldings work.
Strength classes, bending stress and mean density of hardwood and softwood
Commercial softwood lumber dimension chart - nominal and actual sizes.
Rough lumber, surfaced lumber (dressed), worked lumber, shop and factory lumber and yard lumber.
Nominal and minimum-dressed lumber sizes.
Basic size, area, moments of inertia and section modulus for timber - metric units.
Weight supported by a double or triple wood headers.
Densities of various wood species - apple, ash, cedar, elm and more.
Weight of green and air-dried fire wood.
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