PRINCIPAL SOURCES OF WASTE IN THE FOREST 



165 



FIG. 91. Slabs cut from logs in process of converting them into lumber at the 



sawmill. Formerly wasted these slabs are now re-manufactured into lath and 



box lumber and also used for paper pulp and for fiber boards. 



to edging and trimming lumber in the sawmills, and seasoning and 

 remanufacturing. These losses may be summarized as follows: 



PERCENTAGE OF 



TOTAL WOOD 

 WOODS LOSSES VOLUME WASTED 



Stumps 3.0 



Tops, limbs and branches 12.5 



Defective and decayed trunks and boles shattered in felling 5.5 

 Miscellaneous, as improper log lengths, transportation loss 



en route to destination, decay in storage, etc 2.0 



Total 23.0 



MANUFACTURING LOSSES 



Bark 8 



Saw kerf 10 



Slabs 9 



Edgings and trimmings 8 



Seasoning 4 



Remanufacture 3 



Miscellaneous 1 



Total 43 



Total woods and manufacturing losses 66 



Thus, only about one-third of the trees actually felled in the woods 

 is converted into some usable commodities. 





