Wood Classifications - Board Foot

Question 1

• timber sawn or split in the form of beams, boards, joists, planks


- smaller pieces of cut wood

Answer 1

Lumber

Question 2

• coniferous or cone bearing; needle-leafed tree

• can be used for fiber boards, papers


- ex: pine, cedar, cypress, fir, and redwood

Answer 2

Softwoods

Question 3

• deciduous or “broad-leafed” tree


- more dense, fire resistant


• for high end furniture

Answer 3

Hardwoods

Question 4

• method of drying wood in 6-9 months


- “air-drying or sun-drying”

Answer 4

Natural Drying

Question 5

• where lumber is artificially dried to correct moisture content

• used for more expensive lumber

• done in a dry kiln, 20-30 days

Answer 5

Kiln Drying

Question 6

• type of surfaced wood


- surfaced one side; for framing; ‘‘rough sawn”

Answer 6

S1S

Question 7

• type of surfaced wood


- surfaced two sides; used for framing

Answer 7

S2S

Question 8

• type of surface wood


- surfaced four sides; often used for parts with exposed sides and carving details


• “dressed wood”

Answer 8

S4S

Question 9

dimensions of a piece of wood before it is planed down to S1S, S2S or S4S

Answer 9

Nominal Size

Question 10

dimensions of lumber after it has been dressed

Answer 10

Actual Size

Question 11

• a piece of lumber (12” x 1” x 1’ - W x Thk. x L)

- refers to the nominal size of a dressed lumber

Answer 11

Board Foot

Question 12

formula for board ft.

Answer 12

No. of pcs. x (thickness x width x length (ft.) / 12’)

Question 13

specifications when buying lumber

Answer 13

No. of pieces, thickness” x width” x length’, total board foot, kind of lumber and finish