Castellated Beams

Castellated Beams

A castellated beam is created by slicing an I-beam longitudinally along its web in a specific pattern. The goal here is to separate and rejoin the beam with a deeper web. Castellated beams offer increased depth compared to the original section, while maintaining nearly the same weight. The key advantage of these members is their ability to increase depth without adding weight, making them highly efficient for enhancing load-bearing capacity. They provide greater moment-carrying capacity without additional steel. Also, they are useful in situations with height limitations. However, these benefits also come with additional failure mechanisms and necessitating checks.

Since ProtaStructure 2025 onwards, you can now model, analyze and design castellated beams. In the attached document, you will explore how to insert a castellated beam, how to design a non-composite castellated beam and the detailing process. 


    • Related Articles

    • Working with Castellated Beam

      A castellated beam is created by slicing an I-beam longitudinally along its web in a specific pattern. The goal is to separate and then rejoin the beam with a deeper web. These beams are categorized based on the shape of the openings in the web ...
    • Working with Steel Frame

      The “Frame Member” option enables users to model steel beams, composite beams, girts, purlins, braces and frame groups (to model multiple frames). This allows users flexibility to model steel structures anywhere in the model. Frame member sections ...
    • Structural Modelling Overview

      Techniques for member creation and loading are described in this section. Also described here are those other modelling related functions contained on the “Member” pulldown. Additional modelling related topics can be found in the preceding Graphic ...
    • Steel Member Design

      Before the steel members can be designed, you have to model the steel members and perform the building analysis. Currently, ProtaStructure allows you to model and design for the following steel members: Steel Frame Steel Column Steel Brace Steel Girt ...
    • Working with RC Beams

      Different Type of RC Beam They are different types of reinforced concrete beam. The icons are accessible from the Modelling tab, RC Beam drop down list. Foundation Beam A foundation beam is a reinforced concrete beam modelled in ST0, which is always ...