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Home / Assemblies / UL U274
UL U2741.5-hr Fire RatingWallSTC 56
Steel StudMulti-Layer GypsumFiberglass BattPartitionHigh STCDesign

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

UL-listed 1.5-hour fire-rated steel stud wall assembly. 6" steel studs at 24" o.c. with R-11 fiberglass batt, 2 layers of 5/8" Type X gypsum board each side.

Cross-Section Diagram

12345610.00"WALL ASSEMBLYSECTION · NOT TO SCALE6 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 24" o.c.(6.0")
4R-11 fiberglass batt
55/8" Type X gypsum board(5/8")
65/8" Type X gypsum board(5/8")

Specifications

Fire Rating
1.5-Hour
STC Rating
STC 56
Load Bearing
No
Total Thickness
8.5"
Source / Publisher
UL (Underwriters Laboratories)
Design Number
U274
Assembly Type
Wall
Test Standard
UL 263
Construction Group
Light Frame
Number of Layers
6 layers

Applicable Codes

IBC 2021 Table 722.1

Construction Summary

6" steel studs at 24" o.c. with R-11 fiberglass batt, 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 24" o.c.6.0"
4R-11 fiberglass batt—
55/8" Type X gypsum board5/8"
65/8" 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.