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Home / Assemblies / UL U319
UL U3191.5-hr Fire RatingWallSTC 55
Steel StudGypsum BoardFiberglass BattResilient ChannelPartitionHigh STCDesign

Shaft Wall — single layer 1" Type C on resilient channels

UL-listed 1.5-hour fire-rated shaft wall assembly. 2-1/2" CT studs at 24" o.c. with R-11 fiberglass batt, single layer of 1" Shaftliner gypsum board each side on resilient channels.

Cross-Section Diagram

123456.88"WALL ASSEMBLYSECTION · NOT TO SCALE5 LAYERSsee legend for ① ② ③
Legend
11" Shaftliner gypsum board(1")
2Resilient channels at 24" o.c.(7/8")
32-1/2" CT studs at 24" o.c.(2.5")
4R-11 fiberglass batt
51" Shaftliner gypsum board(1")

Specifications

Fire Rating
1.5-Hour
STC Rating
STC 55
Load Bearing
No
Total Thickness
5.375"
Source / Publisher
UL (Underwriters Laboratories)
Design Number
U319
Assembly Type
Wall
Test Standard
ASTM E119
Construction Group
Concrete/Masonry
Number of Layers
5 layers

Applicable Codes

IBC 2024 Table 722.1NFPA 5000IBC 2021 Table 722.1

Construction Summary

2-1/2" CT studs at 24" o.c. with R-11 fiberglass batt, single layer of 1" Shaftliner gypsum board each side on resilient channels

Material Layers

LayerMaterialThickness
11" Shaftliner gypsum board1"
2Resilient channels at 24" o.c.7/8"
32-1/2" CT studs at 24" o.c.2.5"
4R-11 fiberglass batt—
51" Shaftliner gypsum board1"

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.