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Flashcards in Wood Deck (31)
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1

tough fibrous cellular substances that makes up most of the stems and branches pf trees beneath the bark

Wood

2

from conifer trees that have needles instead of leaves

Softwood

3

From broad-leaved or deciduous trees

Hardwood

4

the softer, younger outer part of a tree

Sapwood

5

the older, harder central portion of a tree

Heartwood

6

cracks or lengthwise separation across the annual rings of growth caused by irregular shrinkage during drying

Checks

7

cracks bet and parallel to the annual rings

Shakes

8

irregular growths w/ interrupt the smooth curve of the grain

Knot

9

well defined openings bet annual rings containing solid or liquid pitch

Pitchpockets

10

lack of wood on the edge or corner of a piece

Wane

11

caused by the attack of fungi

Decay

12

any variation w/ the plane surface caused by unequal shrinkage of the board

Warping

13

lumber cut tangent to the annual rings

0 - 45 degrees

Plain Sawing

14

wood cut radially to the annual rigns of growth parallel to the rays

45 - 90 degress

Quarter Sawing

15

wood is cut at a 30 - 60 degree angle to the center of the timber

Rift Sawing

16

lumber less than 2" thk and less than 8" wide

Strips

17

wood suitable as a building material

Timber

18

a manufactured timber product

Lumber

19

lumber that is surfaced w/ a planing machine to attain a smooth surface

Dressed Lumber

20

lumber that is saw, trimmed, and edged but not surfaced

Rough Lumber

21

lumber seasoned in a kiln under controlled conditions

Kiln Dried

22

wide pieces of lumber 2" - 5" thk

Planks

23

pieces more than 2" and less than 5" in any dimension

for strength rather than appearance

Dimension Lumber

24

pieces 5" or more on the smallest dimension

Timber

25

pieces less than 2" thk and at least 8" wide

graded for appearance rather than strength

Board Lumber

26

size of lumber when it is cut from the log

Nominal Size

27

lumber is sold in lengths from _ up to _ in increments of _

6' - 20'

2'

28

makes wood liable to the attack of insects and fungi and unfit for use

Moisture

29

what happens when the moisture content percentages are below the fiber saturation point?

Shrinkage of wood

30

process of removing moisture from green wood

Seasoning