Select correct shaft wall system components and current governing standard
domain: gypsum.org · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Confirm shaft wall components (C-H studs, J-runners, gypsum liner panels, face layers) match the manufacturer's tested and listed assembly
Reference current ASTM C1396/C1396M (which now covers gypsum backing board, coreboard, and shaftliner board) rather than the withdrawn ASTM C442
Verify liner panel thickness (commonly 1 in.) and installation orientation match the listed design
Coordinate stud gauge and spacing with the structural and fire-design requirements, not just standard partition framing practice
Confirm the assembly's fire-resistance rating comes from a specific tested design using these exact components
Known gotchas
ASTM C442, the older shaft wall board specification, was withdrawn in 2005 — specifying it on current drawings can cause submittal rejections; use C1396 or the applicable manufacturer system instead
Shaft wall systems are proprietary tested assemblies; mixing components from different manufacturers can void the fire listing
Liner panel damage or improper insertion into the H-stud is a common field defect that compromises the fire rating
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