Appearance
Color: In
yellow birch (B. alleghaniensis), sapwood is creamy yellow pale
while; heartwood is light reddish brown tinged with red. In sweet
birch (B. lenta), sapwood is light colored and heartwood is dark
brown tinged with red.
Grain: Medium
figuring, straight, closed grain, even texture. Occasional curly
grain or wavy figure in some boards.
Variations
Within Species And Grades: Yellow
birch, sweet birch, paper birch. Paper birch (B. papyrifera) is
softer and lower in weight and strength than yellow or sweet birch.
However, yellow birch is most commonly used for flooring. Boards can
vary greatly in grain and color.
Properties
Hardness/Janka: Janka:1260
(yellow); 2% softer than Northern red oak.
Dimensional
Stability: Average
(Yellow: 9.5; 10% less stabel than Northern red oak).
Durability:
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Workability
Sawing/Machining: Difficult
to work with hand tools, but good machining qualities.
Sanding: Sands
satisfactorily if the correct sanding sequence if
followed.
Nailing: No
known problems.
Finishing: May
be difficult to stain.
Comments: Orgin:
North America
Cost
Multiplier:
Availability
Moderately
available.
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