The rectangular hole flange channel beam is a new cold-formed steel phase that can serve as an alternative to high-connection hollow flange channel beams. This monosymmetric channel section is constructed from torsionally flexible rectangular hole flanges joined to a web plate. Numerical evaluation provides greater flexibility in selecting net and flange detail size combinations to reach optimal design capacities. Although the shear behaviour of commonly used Lipped Channel Beam (LCB) and Welded Hole Flange Beam (HFB) sections with and without net openings has been studied using finite element analysis, the crippling web capacities and failure modes of beams are affected by loading and support conditions, section profile shapes and dimensions, material properties, and hollow type, sizes, and locations. Net crippling behaviour depends on the spacing of rivets, with smaller spacing sections providing greater capacity. Equations that are conservative for numerous spacing of rivets based on the modern design equations are to be proposed for better spacing of rivets and net holes.
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