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Home / Assemblies / UL U301
UL U3012-hr Fire RatingWallSTC 50
Steel StudMulti-Layer GypsumPartitionDesign

Steel Stud Wall — 2 layers 5/8" Type X

UL-listed 2-hour fire-rated steel stud wall assembly. 6" steel studs at 16" o.c., 2 layers of 5/8" Type X gypsum board each side.

Cross-Section Diagram

123458.50"WALL ASSEMBLYSECTION · NOT TO SCALE5 LAYERSsee legend for ① ② ③
Legend
15/8" Type X gypsum board(5/8")
25/8" Type X gypsum board(5/8")
36" steel studs at 16" o.c.(6.0")
45/8" Type X gypsum board(5/8")
55/8" Type X gypsum board(5/8")

Specifications

Fire Rating
2-Hour
STC Rating
STC 50
Load Bearing
No
Total Thickness
8.5"
Source / Publisher
UL (Underwriters Laboratories)
Design Number
U301
Assembly Type
Wall
Test Standard
UL 263
Construction Group
Light Frame
Number of Layers
5 layers

Applicable Codes

IRC R302.1IBC 2024 §722

Construction Summary

6" steel studs at 16" o.c., 2 layers of 5/8" Type X gypsum board each side

Material Layers

LayerMaterialThickness
15/8" Type X gypsum board5/8"
25/8" Type X gypsum board5/8"
36" steel studs at 16" o.c.6.0"
45/8" Type X gypsum board5/8"
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.