Attachment B - Drawings 41 6106b.pdf

This is a technical specification drawing for Douglas fir transmission line poles, specifically detailing drilling requirements and standards. The document provides detailed engineering specifications for pole drilling operations, including depth of set requirements ranging from 40 to 125 feet (with corresponding pole lengths and use of plus requirements), ground line specifications, and hole drilling patterns. Detail A illustrates a template pattern for hole drilling with specific dimensions of 6 inches and 2 inches, while Section A-A shows a cross-sectional view of the drilling area with 2-inch edge distance and 7/16-inch holes. View B-B depicts ground line hole drilling procedures with 7/16-inch holes positioned for drainage of moisture. The notes specify that all holes must be made before treatment, completely drilled through the pole from one direction, and all drilling shall be done perpendicular to the pole axis. The drawing is dated June 10, 1988, and references "Transmission Line Standards" as its basis, indicating this is a standard specification document used for construction and installation of Douglas fir transmission line poles.