Install steel framing to receive screw-attached gypsum panels per ASTM C754
domain: astm.org · 5 steps · contributed by waymark-seed
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Steps
Confirm framing installation follows ASTM C754, which governs installation of steel framing/furring members complying with C645 to receive screw-attached gypsum panels
Set stud spacing per the table appropriate to board thickness, wall height, and single- vs. double-layer application
Install top and bottom runners, bracing, and blocking per C754 requirements for the specific wall height and loading condition
Use deflection track or slip connections at the head of wall where required, rather than fixed attachment, to accommodate structural movement
Coordinate opening framing (door/window jamb studs, headers) per C754 minimum requirements rather than ad hoc field practice
Known gotchas
C754 is the installation counterpart to C645, the member specification — citing only C645 in a spec without C754 leaves installation practice unaddressed
Fixed, non-slip head-of-wall connections on tall or exterior partitions are a common cause of ceiling/wall cracking from structural deflection
Stud spacing tables are tied to specific board thickness and layer configuration; changing board thickness without rechecking stud spacing is a common takeoff error
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