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Pole Specifications (Southern Pine)
Minimum diameter at breast height (outside bark)1 of trees to meet American National Standard specification for various classes of southern pine poles.
| Pole Length (Feet) | Dist. Butt to ground line | Pole Class | ||||||
|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | ||
| Minimum Top Circum. (In.) | ||||||||
| 27 | 25 | 23 | 21 | 19 | 17 | 15 | ||
| Minimum Top Diameter (In.) | ||||||||
| 8.6 | 8.0 | 7.3 | 6.7 | 6.0 | 5.4 | 4.8 | ||
| Feet | Inches (Dbh-ob) | |||||||
| 20 | 4 | 11.2 | 10.5 | 9.8 | 9.0 | 8.3 | 7.6 | 7.0 |
| 25 | 5 | 12.1 | 11.4 | 10.7 | 9.9 | 9.2 | 8.3 | 7.8 |
| 30 | 5 1/2 | 13.2 | 12.3 | 11.6 | 10.7 | 9.9 | 9.0 | 8.5 |
| 35 | 6 | 14.1 | 13.2 | 12.3 | 11.4 | 10.5 | 9.8 | 9.0 |
| 40 | 6 | 14.8 | 13.9 | 13.0 | 12.1 | 11.2 | 10.3 | 9.6 |
| 45 | 6 1/2 | 15.6 | 14.6 | 13.6 | 12.7 | 11.8 | 10.9 | 10.1 |
| 50 | 7 | 16.3 | 15.2 | 14.1 | 13.2 | 12.3 | 11.4 | 10.5 |
| 55 | 7 1/2 | 16.8 | 15.7 | 14.6 | 13.7 | 12.7 | 11.8 | – |
| 60 | 8 | 17.4 | 16.3 | 15.2 | 14.1 | 13.0 | 12.1 | – |
| 65 | 8 1/2 | 17.9 | 16.6 | 15.6 | 14.6 | 13.6 | – | – |
| 70 | 9 | 18.4 | 17.4 | 16.3 | 15.0 | 13.9 | – | – |
| 75 | 9 1/2 | 19.0 | 17.7 | 16.6 | 15.6 | – | – | – |
| 80 | 10 | 19.5 | 18.3 | 17.0 | 15.9 | – | – | – |
| 85 | 10 1/2 | 19.9 | 18.6 | 17.4 | – | – | – | – |
| 90 | 11 | 20.3 | 19.2 | 17.7 | – | – | – | – |
| 95 | 11 | 20.6 | 19.5 | 18.1 | – | – | – | – |
1 D.B.H = Minimum Circumference 6' from butt/(.88 X 3.1416)
Source: Hawes, E. T. 1947. A method of determining southern pine pole classes from d.b.h. Jour. Forestry 45: 204,205 illus.
pole_specifications.txt · Last modified: 2012/05/23 19:42 by 128.192.48.37
