Taper of Wood Poles.
Abstract
For accurate engineering analysis the shape or taper of a pole must be known. Both curvillinear and straight-line functions were fit to data from 617 southern pine poles and from 225 Douglas-fir and 57 western redcedar trees. The best estimate of geometry or shape of the outer surface of the poles was a straight line. The southern pine data along with data from 1,069 Douglas-fir poles and 1,719 western redcedar poles were further analyzed for the mean and upper and lower 95% tolerance intervals of the taper of the pole surfaces. There was a statistical difference in the tapers between length-class combinations in a given species. (Modified author abstract)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1974
- Accession Number
- AD0777824
Entities
People
- Billy Bohannan
- Hermann Habermann
- Joan E. Lengel
Organizations
- Forest Products Laboratory