NASFA L-Header Field Guide
L-Shaped Header Field Guide, North American Steel Framing Alliance
What it measures
Design and detailing guidance for L-shaped headers over openings in cold-formed steel framing.
Why it matters for a panel envelope
Openings are where a panel system is weakest and where most field questions arise.
Guardian Shield™
Listed among the Shield™ specification's design references. Structural headers for openings are integrated into the panels at the factory.
Source · 3-Part Specification, 1.3 B; Technical Product Description · Guardian documents
Written by Data Subsystems, for Guardian Structural Technologies. Last updated .
Drafted from Guardian Structural product literature and published building-science sources. Awaiting Guardian technical review. Confirm any figure against the current product documents or ask us before you rely on it in a design.
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