UL U3253-hr Fire RatingWallSTC 50
Steel StudMulti-Layer GypsumPartitionDesign
Shaft Wall — 2 layers 1" Type C
UL-listed 3-hour fire-rated shaft wall assembly. 2-1/2" CT studs at 24" o.c., 2 layers of 1" Shaftliner gypsum board each side.
Cross-Section Diagram
Legend
11" Shaftliner gypsum board(1")
21" Shaftliner gypsum board(1")
32-1/2" CT studs at 24" o.c.(2.5")
41" Shaftliner gypsum board(1")
51" Shaftliner gypsum board(1")
Specifications
Fire Rating
3-Hour
STC Rating
STC 50
Load Bearing
No
Total Thickness
6.5"
Applicable Codes
IRC R302.1IBC 2021 §722IBC 2021 Table 722.1
Construction Summary
2-1/2" CT studs at 24" o.c., 2 layers of 1" Shaftliner gypsum board each side
Material Layers
Important Notice
This assembly listing is for reference only. Always verify against the current UL Product iQ database before specifying in construction documents. Material substitutions may void the fire rating. Consult with a qualified fire protection engineer for project-specific requirements.