unsound wood

unsound wood

Same as decayed wood.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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"This time of year brings an increased risk of house fires from wood stoves and space heaters, as well as an increased number of cases of carbon monoxide poisoning from non-traditional heat sources, such as unsound wood stoves and oil/kerosene space heaters," says Murphy, who adds winter is especially hard on the state's homeless population, many of whom choose not to stay at shelters and instead walk the streets and sleep in homeless camps.
A grade one cant had zero to 15 percent unsound wood and yielded 83 percent pallet parts.
Three preliminary pallet cant grades were used to segregate the cants according to the volume of unsound wood. A total of 47,258 board feet of hardwood cants were graded and processed into pallet parts.
The National Hardwood Lumber Association (NHLA) provides grading criteria for Common Timbers and Industrial Blocking that indicate the allowance of unsound wood as long as strength for intended use is not impaired due to this defect (NHLA 2003).
These grade rules were developed based on the allowance of 30 percent or greater unsound wood in cants that roughly accommodate the profitability of pallet part yields for pallet manufacturers.
The cant grade was based on the percentage of unsound wood volume resulting from these defects.
X 1 in.; large dark discolored areas; and punky or unsound wood.
This grade will not permit any knots over 1/8 in.; splits, checks or shake; holes, gouges or other open areas deeper than 1/32 in.; bark or wane; punky or unsound wood; mineral streaks over 1/8 in, X 1 1/2 in.
diameter; unlimited birdseye; small areas of punky or unsound wood; and boards of any width up to 5 in.
This grade will not permit any knots over 2/8 in.; splits, checks or shake; holes, gouges or other open areas deeper than 1/32 in.; bark or wane; punky or unsound wood; mineral streaks over 1/8 in.
diameter, unlimited birdseye; small areas of punky or unsound wood; and beards of any width up to 5 in.
diameter; unlimited bird's-eye; small areas of punky or unsound wood; and boards of any width up to 5 in.