Engineers are constantly trying to improve the materials and practices of design and construction. One such improvement occurred in built-up structural members in the mid-1930was castellated beam. The use of castellated beam for various structures is rapidly gaining appeal. This is due to the increased depth of the section without any additional weight, high strength-to-weight ratios and their lower maintenance and painting costs, increase in vertical bending stiffness, ease of service provision, and attractive appearance. However one consequence of the increased depth of the section is the...