Accession Number : AD0777824
Title : Taper of Wood Poles.
Descriptive Note : Forest Service general technical rept.,
Corporate Author : FOREST PRODUCTS LAB MADISON WIS
Personal Author(s) : Bohannan,Billy ; Habermann,Hermann ; Lengel,Joan E.
Report Date : 1974
Pagination or Media Count : 11
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)
Descriptors : *Wood, *Stresses, Tolerances(Mechanics), Statistical analysis, Loads(Forces), Least squares method, Engineering, Standards, Measurement
Subject Categories : Wood, Paper and Related Forestry Products
Distribution Statement : APPROVED FOR PUBLIC RELEASE