Sawn, trimmed and edged lumber. The faces are rough with saw marks.
Rough lumber smoothed by surfacing machines. Subcategories based on the number of sides and edges that have been smoothed.
- S1S - Surfaced on 1 Sides
- S2S - Surfaced on 2 Sides
- S3S - Surfaced on 3 Sides
- S4S - Surfaced on 4 Sides
- S1E - Surfaced 1 Edge
- S2E - Surfaced 2 Edges
- S1S1E - Surfaced 1 Side and 1 Edge
- S1S2E - Surfaced 1 Side and 2 Edges
Note that S4S lumber planed and surfaced all four sides will be noticeably less than in its nominal dimension.
Surfaced lumber that has been matched and patterned.
Shop and Factory Lumber
Millwork lumber - used for molding, door jambs and windows frames.
Structural Lumber or Yard Lumber
Yard lumber used for house framing, sheathing, concrete forms.
Yard lumber or structural softwood lumber is subdivided in
- Boards - no more than 1 inch thick and 4-12 inches wide
- Planks - more than 1 inch thick and more than 6 inches wide
- Timbers - width and thickness greater than 5 inches
Engineering related topics like Beaufort Wind Scale, CE-marking, drawing standards and more.
Calculate angles with a straight board across carpenter's square.
Board feet is used as a volume measurement of lumber.
Common sizing of glue-laminated timber.
Comparing sandpaper grit size and surface roughness.
Species of hardwood vs. softwood.
Sizing of hardwood lumber.
Douglas Fir in horizontal roof rafters and maximum spans.
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.
Nominal and minimum-dressed lumber sizes.
Basic size, area, moments of inertia and section modulus for timber - metric units.
Properties of structural lumber.
Bending and compression strength of wood species used in beams.
Densities of various wood species - apple, ash, cedar, elm and more.
Weight of green and air-dried fire wood.