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Flashcards in Structural Lumber Grading Deck (20)
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1
Q

several agencies certified to grade lumber by:

A

American Lumber Standards Committee

2
Q

grading is done at ___,

via ____.

A

the sawmill,

visual inspection/machine.

3
Q

2 primary classifications for softwood

A

yard lumber,

factory and shop lumber.

4
Q

yard lumber used for

A

structural + rough framing

5
Q

factory and shop lumber used for

A

doorframes, windows, finishing items.

6
Q

yard lumber subdivided into

A

boards/
dimension/
timber

7
Q

yard lumber groups used for structural purposes:

A

dimension + timber

8
Q

yard lumber:
2-4” thick, 2-4” wide.
ex. 2x2

A

1

9
Q

yard lumber:
2-4” thick, 4” wide
ex. 2x4

A

2

10
Q

group #2 is subdivided into:

A

“construction, standard, and utility.”

11
Q

yard lumber:
2-4” thick, 5”+ wide
ex. 2x6, 2x8

A

3

12
Q

yard lumber:
beams and stringers
≥5” width,
w depth not > width+2” .

A

4

13
Q

yard lumber:
posts and timbers.
≥5x5”,
w depth not > width+2” .

A

5

14
Q

to label allowable bending stress and modulus of elasticity.

A

machine-stress-rated lumber

15
Q

factory and shop lumber:
nominal thickness,
and graded per:

A

<1” nominal thickness,

graded per appearance/use.

16
Q

factory and shop lumber:

typ grades:

A

select/common

17
Q

factory and shop lumber:

select grades:

A

B&Better (free of knots)
C Select
D Select

18
Q

factory and shop lumber:

common grades:

A

no. 1 (commonly best)
no. 2
no. 3
no. 4
no. 5
* size/character of the knots.

19
Q

lumber is ordered and priced by

A

board foot.

20
Q

board foot

A

is a quantity of lumber,
= 12x12x1in thick.
by nominal size.