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Engineering Light Gauge Metal Framing Box Header Spans: Load Paths, Engineering Principles, and Span Limitations
"Light gauge metal framing box header spans govern the structural capacity of door and window openings in load-bearing cold-formed steel construction. A box header—typically constructed by nesting two C-shape studs back-to-back or configuring channels with track to form a closed rectangular cross-section—transfers gravity and lateral loads from above wall openings down to the vertical jamb studs, requiring precise engineering calculations compliant with American Iron and Steel Institute standards to prevent excessive deflection or structural failure. Introduction to Cold-Formed Steel Box Headers In modern light gauge metal (LGM) framing, also..."
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