Can you use Steel Member Design for Combined Stress to design a castellated beam?
PROKON does not have a design module dedicated to castellated beams. However, you can do some of the design checks using Steel Member Design for Combined Stress as follows:
- In the Section Database, go to the table for parallel flange (or taper flange) I-sections. Scroll to the bottom of the table and enter the overall section dimensions of the castellated section on a new line. For the web thickness, use an average value that will give the same overall cross-sectional area. The Section Database module will automatically calculate the section properties for the entered beam section. On the File menu, save the information as your new default database (this will make the new section available to all PROKON modules).
- Use this new section in you Single Beam Analysis, Frame Analysis or Sumo Structural Modeller model.
- Use Steel Member Design for Combined Stress to perform the member and section strength design checks for flexure and axial force.
- Use hand calculations for additional shear checks in the web.
- When entering the castellated beam section in the Section Database, you must enter it as a regular I-section. If you enter it as a custom section, Steel Member Design for Combined Stress will have insufficient information available to perform the design checks.
- The above procedure effectively models a section with a solid web. This should be a reasonable approach for flexural design. You need to check the performance of the open web in shear by hand calculations.
- Cross-check your design results with the supplier's database.