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Flashcards in Wood 2 Deck (51)
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1

tough fibrous cellular substance that makes up most of the stems and branches of trees beneath the bark.

wood

2

softwood and hardwood

two types of wood

3

conifers (evergreens) which have needles instead of leaves , ex. pine

softwoods

4

broad-leaved trees or deciduous trees.

hardwoods

5

sapwood and heartwood

structure of wood

6

sapwood

softer,younger outer portion of a tree, usually lighter in color

7

heartwood

older,harder central portion of a tree, darker than sapwood. Central core of the log

8

decay,checks,knots,shakes,pitchpockets,wane,warping

defects of wood

9

caused by the attack of fungi

decay

10

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

checks

11

cracks between and parallel to the annual rings.

shakes

12

irregular growth in the body of a tree which interrupt the smooth curve of the grain.

knots

13

well-defined openings between annual rings.

pitchpockets

14

lack of wood on the edge or corner of a piece

wane

15

caused by unequal shrinkage of the board.

warping

16

crook,bow,cup,twist

types of warping

17

distortion of the board. Long edge is convex or concave

crook

18

face is convex or concave longitudinal

bow

19

convex or concave across the board

cup

20

one corner is raised

twist

21

plainsawing,quartersawing,riftsawing

methods of sawing wood

22

lumber cut tangent to the annual rings. rings at an angle 0 to 45 degrees

plainsawing

23

wood cut radially to the annual rings or growth parallel to te rays. angle 45 degrees to 90 degrees.

quartersawing

24

30 to 60 degrees angle to the center of the timber.

riftsawing

25

woods suitable for use as a building material

timber

26

timber product manufactured by sawing, etc.

lumber

27

lumber that is surfaced with planing machine to attain a smooth surface and uniform size. s2s,s4s

dressed lumber

28

saw,edged and trimmed but not surfaced

rough lumber

29

lumber seasoned in a kiln

kiln dried

30

seasoned by exposure to the atmosphere

air dried/sun dried