Measures and yields of products and residues 3331 



In producing these tables, Hanks (1977) used a kerf size of 10/64 for band- 

 saws and 17/64 for circular saws. For a different kerf size, adjust the sawdust 

 volume as follows: 

 Adjusted sawdust volume = sawdust volume in table x new kerf 



10/64 or 17/64 



(27-51) 



For mixed oak logs sawn with a circular saw in Missouri (Massengale 1971), 

 sawdust green weights ranged from 50 pounds for an 8-inch 8-foot-long log to 

 406 pounds for a 16-inch, 16-foot-long log (table 27-146). Massengale also 

 provided data on sawdust production per Mbf Doyle log scale (table 27-144) and 

 per Mbf lumber scale (table 27-145). 



For black oak sawn with a band saw, tallies of sawdust production by log size 

 and by tree size are in tables 27-147 through 27-149. Comparable data for 

 yellow-poplar are in tables 27-150 through 27-152. 



Bulk density. — The bulk density of sawdust depends in large part on the 

 wood species, the moisture content of the sawdust, and its degree of compac- 

 tion. Fresh sawdust has higher bulk density than air-dried sawdust; sawdust 

 which has been blown or packed into a container has higher bulk density than 

 sawdust which has merely fallen in by gravity. See tables 16-44 and 16-45 and 

 related discussion in section 16-3 for data. 



Table 27-1 — Solid content (wood and bark) per stacked standard cord) of 4- and 8-ft- 

 long rough hardwood pulpwood in three diameter classes (Redman 1957)' 



Bold mid-length diameter outside bark (inches) 

 Character Less than 6 6 to 12 More than 12 



of bolts 4 ft 8 ft 4 ft 8 ft 4 ft 8 ft 



— Cubic feet 



Straight 



Smooth 85 82 91 88 98 95 



Slightly rough 82 78 89 86 96 93 



Slightly rough and knotty 78 73 85 82 92 90 



Not straight 



Slightly crooked and rough 75 70 82 79 89 86 



Considerably crooked 70 65 79 75 85 82 



Crooked, rough and knotty 67 60 75 70 78 75 



Tops and branches 58 50 — — — — 



'Original data from: Forest Research Digest, Lake States Forest Experiment Station, May 1935. 

 (Mimeographed.) Values shown are for the standard cord, 4 by 4 by 8 ft. 



