Wood Grain Structure & Methods of Sawing Flashcards
1
Q
- type of wood grain structure
- fibers running in the same direction as the main axis of the tree
A
Straight grain
2
Q
- type of wood grain structure
- grains are in successive layers and in opposite direction
A
Interlocked grain
3
Q
- type of wood grain structure
- constantly in orientation so that a line parallel to their direction appears as wavy lines
A
Wavy or Curly grain
4
Q
- type of wood grain structure
- when a straight-grained log is not sawn along its vertical axis
A
Diagonal grain
5
Q
- type of wood grain structure
- fibers follow a spiral course with a left or right-handed twist
A
Spiral grain
6
Q
- type of wood grain structure
- has fibers at directions that are varying from the log’s vertical axis
A
Irregular grain
7
Q
- type of grain structure according to how lumber is sawn
- wood is cut parallel to the grain direction and tangent to growth rings
A
Plain/Tangential or Flat grain
8
Q
- type of grain structure according to how lumber is sawn
- wood is cut parallel to the grain direction but through the radius of growth rings
A
Quarter or Radial grain
9
Q
- type of grain structure according to how lumber is sawn
- board is cut across the grain (perpendicular to the grain direction and growth rings)
A
End grain
10
Q
- method of sawing lumber
- most common method, it produces the highest quantity of usable lumber- “sawing around”
- minimum waste/ cost, minimum stability
A
Plain Sawing
11
Q
- method of sawing lumber
- cuts the log in quarters, then slices each quarter into boards, either by cutting from two flat sides or by gang-sawing (parallel cuts)
A
Quarter Sawing
12
Q
- method of sawing lumber
- annual rings are typically between 30 - 60 degrees- has unique linear appearance
- maximum waste/ cost, medium stability
A
Rift Sawing
13
Q
- method of sawing lumber
- “sawing through and through”
- produces much wider boards than other methods
- mixed grains
A
Live Sawing
