public void TestMethod1()
        {
            var t1 = new Technical_Demand();

            t1.Write_Info2TXT();
            var t2 = new CrossSection();

            t2.calculate_girder_parament(ref t1);
            t2.Write_Info2TXT();
            var t3 = new longitudinal_lateral_connection();

            t3.get_parameters(ref t1, ref t3, ref t2);
            t3.Write_Info2TXT();
        }
        public void TestMethod1()
        {
            var t1 = new Technical_Demand();

            t1.Write_Info2TXT();
            var t2 = new CrossSection();

            t2.calculate_girder_parament(ref t1);
            t2.calculate_stiffener_info(t2.girder_web_height, t2.girder_web_thickness);
            t2.Write_Info2TXT();
            var t3 = new longitudinal_lateral_connection();

            t3.get_parameters_truss(ref t1, ref t3, ref t2);
            t3.Write_Info2TXT();
        }