Searching for: glulam utility pole design guide and/or tapered rectangular bending member design-cantilever. Have AITC Handbook, ANSI O5.1 and ANSI O5.2, ASCE 111 and NESC.
Three ASTM standards are related to wood poles and piles (primarly round). The main standard, designated D3200 ,refers to two other standards: ASTM D25, Standard Specification for Round Timber Piles and ASTM D2899, Standard Pracitice for Establishing Design Stresses for Round Timber Piles