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Home / Assemblies / UL U124
UL U1241-hr Fire RatingWallLoad-BearingSTC 56
Wood StudGypsum BoardMineral WoolResilient ChannelLoad-Bearing WallHigh STCDesign

Wood Stud Wall — single layer 5/8" Type X on resilient channels

UL-listed 1-hour fire-rated wood stud wall assembly. 2x4 wood studs at 24" o.c. with R-21 mineral wool batt, single layer of 5/8" Type X gypsum board each side on resilient channels.

Cross-Section Diagram

123457.13"WALL ASSEMBLYSECTION · NOT TO SCALE5 LAYERSsee legend for ① ② ③
Legend
15/8" Type X gypsum board(5/8")
2Resilient channels at 24" o.c.(7/8")
32x4 wood studs at 24" o.c.(3.5")
4R-21 mineral wool batt
55/8" Type X gypsum board(5/8")

Specifications

Fire Rating
1-Hour
STC Rating
STC 56
Load Bearing
Yes
Total Thickness
5.625"
Source / Publisher
UL (Underwriters Laboratories)
Design Number
U124
Assembly Type
Wall
Test Standard
CAN/ULC-S101
Construction Group
Light Frame
Number of Layers
5 layers

Applicable Codes

IBC 2021 §722IBC 2024 §722NFPA 5000

Construction Summary

2x4 wood studs at 24" o.c. with R-21 mineral wool batt, single layer of 5/8" Type X gypsum board each side on resilient channels

Material Layers

LayerMaterialThickness
15/8" Type X gypsum board5/8"
2Resilient channels at 24" o.c.7/8"
32x4 wood studs at 24" o.c.3.5"
4R-21 mineral wool batt—
55/8" 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.