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Recovery
Sawn recovery is the output of timber products
of particular grades produced from a log, as a percentage
of log volume. The difficulties in producing useful timber
dimensions from round logs, and waste due to product-related
defects, mean sawn recovery rates can vary widely. For products
that require a high proportion of heartwood or clearwood,
recoveries from small diameter or defective logs may be as
low as 10–15 per cent. When softwoods are sawn for structural
timber, the presence of sapwood, small knots or other non-structural
defects is not as important. In these cases, larger diameter
softwoods can yield recoveries as high as 60 per cent.
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