STAAD.Pro HelpDesignD. Design CodesD8.Indian CodesD8.D. Indian Codes - Steel Design per IS 802 - 1995 D8.D. Indian Codes - Steel Design per IS 802 - 1995 STAAD.Pro is capable of performing steel design based on the Indian code IS 802 1995 Use of Structural Steel in Overhead Transmission Line Towers - Code of Practice. D8.D.1 General CommentsThis section presents some general statements regarding the implementation of Indian Standard code of practice (IS:802-1995 – Part 1) for structural steel design for overhead transmission line towers in STAAD. The design philosophy and procedural logistics for member selection and code checking are based upon the principles of allowable stress design. D8.D.2 Allowable StressesThe member design and code checking in STAAD.Pro are based upon the allowable stress design method as per IS:802 (1995). It is a method for proportioning structural members using design loads and forces, allowable stresses, and design limitations for the appropriate material under service conditions. 8D.D.3 Stability RequirementsSlenderness ratios are calculated for all members and checked against the appropriate maximum values. The following are the default values used in STAAD.Pro.8D.D.4 Minimum Thickness RequirementAs per Clause7.1 of IS: 802-1995 minimum thickness of different tower members shall be as follows:8D.D.5 Code CheckingThe purpose of code checking is to verify whether the specified section is capable of satisfying applicable design code requirements. The code checking is based on the IS:802 (1995) requirements. Axial forces at two ends of the members are utilized for the code checking calculations. 8D.D.6 Member Selection STAAD.Pro is capable of performing design operations on specified members. Once an analysis has been performed, the program can select the most economical section, that is, the lightest section, which satisfies the applicable code requirements. The section selected will be of the same type (either angle or channel) as originally specified by the user. Member selection may be performed with all angle or channel sections and user-provided tables. Selection of members, whose properties are originally provided from user specified table, will be limited to sections in the user provided table. 8D.D.7 Tabulated Results of Steel DesignAn example of a TRACK 2.0 output for a compression member is shown here:8D.D.8 Design Parameters8D.D.9 Calculation of Net Section FactorThe procedure for calculating the net section factor for an angle section is as follows:8D.D.10 Example ProblemA transmission line tower is subjected to different loading conditions. Design some members as per IS-802 and show detailed calculation steps for the critical loading condition. Parent Topic: D8.Indian Codes