B
HomeLibrariesCopilotSearchProjectsBookmarks
FeedbackHelp Desk
Libraries
Building Codes
Code LibraryIBC — BuildingIRC — ResidentialIFC — FireIPC — PlumbingIMC — MechanicalIFGC — Fuel GasIECC — EnergyNEC — ElectricalModel Codes
Specifications
CSI SpecificationsDOT SpecsTransit SpecsUSACE
Standards
TransportationRailroadFire SafetyAccessibilityStructural
Tools & References
DiagramsAssembliesProductsCalculatorsChecklistsPermits
PricingLog in
Home / Assemblies / UL U343
UL U3433-hr Fire RatingWallSTC 58
Steel StudMulti-Layer GypsumResilient ChannelPartitionHigh STCDesign

Shaft Wall — 3 layers 1" Type C on resilient channels

UL-listed 3-hour fire-rated shaft wall assembly. 3-5/8" CT studs at 24" o.c., 3 layers of 1" Shaftliner gypsum board each side on resilient channels.

Cross-Section Diagram

1234567810.50"WALL ASSEMBLYSECTION · NOT TO SCALE8 LAYERSsee legend for ① ② ③
Legend
11" Shaftliner gypsum board(1")
21" Shaftliner gypsum board(1")
31" Shaftliner gypsum board(1")
4Resilient channels at 24" o.c.(7/8")
53-5/8" CT studs at 24" o.c.(3.625")
61" Shaftliner gypsum board(1")
71" Shaftliner gypsum board(1")
81" Shaftliner gypsum board(1")

Specifications

Fire Rating
3-Hour
STC Rating
STC 58
Load Bearing
No
Total Thickness
10.5"
Source / Publisher
UL (Underwriters Laboratories)
Design Number
U343
Assembly Type
Wall
Test Standard
ASTM E119
Construction Group
Concrete/Masonry
Number of Layers
8 layers

Applicable Codes

IBC 2024 Table 722.1IBC 2021 §722

Construction Summary

3-5/8" CT studs at 24" o.c., 3 layers of 1" Shaftliner gypsum board each side on resilient channels

Material Layers

LayerMaterialThickness
11" Shaftliner gypsum board1"
21" Shaftliner gypsum board1"
31" Shaftliner gypsum board1"
4Resilient channels at 24" o.c.7/8"
53-5/8" CT studs at 24" o.c.3.625"
61" Shaftliner gypsum board1"
71" Shaftliner gypsum board1"
81" 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.