ume predictions, but major changes would 
probably require a new equation. 
For some purposes it is desirable to con- 
vert the volume to equivalent cords. This 
conversion can be accomplished by dividing 
the cubic-foot volume of the poles (obtained 
by using the table or formula) by 92, which 
is the average number of cubic feet per cord 
of solid wood (79) plus bark (13). 
3 Gevorkiantz, S. R., and Olsen, L. P. Composite 
volume tables for timber and their application 
in the Lake States. U.S. Dept. Agr. Tech. Bul. 
1104, 51 pp. 1955. 
TABLE 1. -— Cubic-foot volume (including 
bark) of unpeeled red and jack pine poles 
Length | Top diameter outside bark (inches) 
(feet) 4 | 5 ie ee are 
10 1 Ao eG 2122 Ga on aak 
12 (oS 2 bina 5.0 
TANTO) O16 wo 6.2 
16). 285) 320442") 5 Gale 
1827 | 388 5206 ey toe 
20, (32) 44 5.8, 7/3) OO mOng 
22.) B51 ver) 8.5.) 103n mes 
25.) 444 N62 82) 10.2 12a 
30, 5.8 |. 8.2 10.6 13.8 16.2 malon 
351, 728 100.1318 16-70 Dorm ode 
40 9.0 12.4|162 20.3 248 2915 
45 -10.6.14.7:, 19.3. 24.0 2015350 
TABLE 2. — Product specifications used in this study 
Maximum | lop diameter | Min. circumfer- 
Product Length | crookor | Mside bark — ence over bark 
sweep’ /Min. Max. |6 feet from butt 
Feet Inches Inches Inches Inches 
Building poles 10 and 12 1.0 5 he None 
Building poles 14 and 16 1.5 5D 7.9 None 
Building poles 18 and 22 Z.0 5 thes None 
Telephone poles 20 and 25 2 5 7.9 None 
Telephone poles 50 a‘ 5) (es) 7H) 
Telephone poles 395 6 Bes 32 
Telephone poles 40 7 8.5 36 
Telephone poles 45 7 i 8.5 42 
1 Deviation from centerline. 
2 Centerline shall not fall outside body of pole. 
Octeber 1964 , 
| ROBERT E| LEASE, Forester 
~ North Central Region 
JOHN W. IBENZIE, [Research Forester 
Lake States Forest Experiment Station 
