Design aids for transmission line towers

This paper presents tables to aid the design of transmission line tower structures. The slenderness ratios and the corresponding compression capacities are tabulated for generally rolled and available equal and unequal angle sections. The net areas and the corresponding tension capacities are provided in the tables. Usually adopted bolt connections are considered in net area computations. The concepts and procedure to generate these tables and their limitations are described. The scanning procedures to use these tables in selecting an appropriate angle section with connection details are explained and illustrated with sample design problems. The normal trial and error procedure for sample design problems are compared and the advantages of design procedure using the tables are discussed.