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Home / Assemblies / UL U289
UL U2894-hr Fire RatingWallLoad-BearingSTC 61
Steel StudMulti-Layer GypsumFiberglass BattResilient ChannelLoad-Bearing WallHigh STCDesign

Steel Stud Wall — 4 layers 5/8" Type X on resilient channels

UL-listed 4-hour fire-rated steel stud wall assembly. 6" steel studs at 24" o.c. with R-19 fiberglass batt, 4 layers of 5/8" Type X gypsum board each side on resilient channels.

Cross-Section Diagram

123456789101113.38"WALL ASSEMBLYSECTION · NOT TO SCALE11 LAYERSsee legend for ① ② ③
Legend
15/8" Type X gypsum board(5/8")
25/8" Type X gypsum board(5/8")
35/8" Type X gypsum board(5/8")
45/8" Type X gypsum board(5/8")
5Resilient channels at 24" o.c.(7/8")
66" steel studs at 24" o.c.(6.0")
7R-19 fiberglass batt
85/8" Type X gypsum board(5/8")
95/8" Type X gypsum board(5/8")
105/8" Type X gypsum board(5/8")
115/8" Type X gypsum board(5/8")

Specifications

Fire Rating
4-Hour
STC Rating
STC 61
Load Bearing
Yes
Total Thickness
11.875"
Source / Publisher
UL (Underwriters Laboratories)
Design Number
U289
Assembly Type
Wall
Test Standard
CAN/ULC-S101
Construction Group
Light Frame
Number of Layers
11 layers

Applicable Codes

IBC 2021 Table 722.1

Construction Summary

6" steel studs at 24" o.c. with R-19 fiberglass batt, 4 layers of 5/8" Type X gypsum board each side on resilient channels

Material Layers

LayerMaterialThickness
15/8" Type X gypsum board5/8"
25/8" Type X gypsum board5/8"
35/8" Type X gypsum board5/8"
45/8" Type X gypsum board5/8"
5Resilient channels at 24" o.c.7/8"
66" steel studs at 24" o.c.6.0"
7R-19 fiberglass batt—
85/8" Type X gypsum board5/8"
95/8" Type X gypsum board5/8"
105/8" Type X gypsum board5/8"
115/8" Type X gypsum board5/8"

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.