Past Quality Indexes were based on air-dried lumber
grade yields, but these yields can be affected by mill-specific factors.
Coastal Lumber also produces more than 110 million board feet of green and air-dried lumber
, and industrial-grade hardwoods for use in the pallet and railroad tie industries.
By kiln drying the lumber to reduce and control moisture content, Lindal decreases the chance for the twisting and warping that often occurs with green or air-dried lumber
. Kiln drying also reduces the weight while increasing strength, making your construction easier and freight costs lower.
The quality of the dried air-dried lumber
was good, i.e., there was very little checking or warp and honeycombing was not observed on boards that were subsequently cross-cut.
Even fairly well air-dried lumber
will shrink a little and split in the thicker dimensions.
Because the NIR spectrometer gathers information from the surface of the wood, this technology may be less useful for scanning air-dried lumber
, where significant gradients in MC can exist between the core and the surface layers.
is that which has been "stickered" and allowed to dry in an outside environment, down to a m.c.
The MC of the air-dried lumber
at the start of DH drying was obtained using a resistance-type moisture meter before the lumber was stacked in the kiln.
The majority of kiln drying operations have lower than normal kiln-dried lumber inventories and very little air-dried lumber
In air-dried lumber
cut from plantation conifers, twist increases with SOG and decreases with the distance of the board from the pith (Balodis 1972).
More than half of the weight of rough, air-dried lumber
is water or waste material.