Structural Lumber Moisture Flashcards
1
Q
Moisture Content:
definition
A
water weight in wood,
compared to weight in oven dried wood.
2
Q
moisture content affects:
A
shrinkage,
weight,
strength.
and overall withdrawal resistance of nails.
3
Q
fiber saturation point.
A
cell walls
are completely saturated,
but no water in cells.
4
Q
avg moisture content of all wood
A
30%
5
Q
above 30% moisture content
A
dimensionally stable
6
Q
below 30% moisture content
A
shrink
7
Q
ideally, moisture content @ install is equal to:
A
humidity to which it will be exposed
8
Q
dry lumber moisture content:
A
≤ 19%
9
Q
kiln dried lumber moisture content:
A
≤ 15%
10
Q
wood shrinks most
A
perpendicular to grain
11
Q
position in log where piece is cut affects:
A
shrinkage characteristics
