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Home / Assemblies / UL U174
UL U1741-hr Fire RatingWallLoad-BearingSTC 33
Wood StudGypsum BoardLoad-Bearing WallDesign

Wood Stud Wall — single layer 5/8" Type C

UL-listed 1-hour fire-rated wood stud wall assembly. 2x6 wood studs at 24" o.c., single layer of 5/8" Type C gypsum board each side.

Cross-Section Diagram

1236.75"WALL ASSEMBLYSECTION · NOT TO SCALE3 LAYERSsee legend for ① ② ③
Legend
15/8" Type C gypsum board(5/8")
22x6 wood studs at 24" o.c.(5.5")
35/8" Type C gypsum board(5/8")

Specifications

Fire Rating
1-Hour
STC Rating
STC 33
Load Bearing
Yes
Total Thickness
6.75"
Source / Publisher
UL (Underwriters Laboratories)
Design Number
U174
Assembly Type
Wall
Test Standard
CAN/ULC-S101
Construction Group
Light Frame
Number of Layers
3 layers

Applicable Codes

IBC 2021 Table 722.1IRC R302.1

Construction Summary

2x6 wood studs at 24" o.c., single layer of 5/8" Type C gypsum board each side

Material Layers

LayerMaterialThickness
15/8" Type C gypsum board5/8"
22x6 wood studs at 24" o.c.5.5"
35/8" Type C 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.