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Home / Assemblies / UL U262
UL U2624-hr Fire RatingWallLoad-BearingSTC 62
Steel StudMulti-Layer GypsumMineral WoolLoad-Bearing WallHigh STCDesign

Steel Stud Wall — 3 layers 5/8" Type X

UL-listed 4-hour fire-rated steel stud wall assembly. 2-1/2" steel studs at 24" o.c. with R-15 mineral wool batt, 3 layers of 5/8" Type X gypsum board each side.

Cross-Section Diagram

123456787.75"WALL ASSEMBLYSECTION · NOT TO SCALE8 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")
42-1/2" steel studs at 24" o.c.(2.5")
5R-15 mineral wool batt
65/8" Type X gypsum board(5/8")
75/8" Type X gypsum board(5/8")
85/8" Type X gypsum board(5/8")

Specifications

Fire Rating
4-Hour
STC Rating
STC 62
Load Bearing
Yes
Total Thickness
6.25"
Source / Publisher
UL (Underwriters Laboratories)
Design Number
U262
Assembly Type
Wall
Test Standard
CAN/ULC-S101
Construction Group
Light Frame
Number of Layers
8 layers

Applicable Codes

IBC 2024 Table 722.1IBC 2021 §722

Construction Summary

2-1/2" steel studs at 24" o.c. with R-15 mineral wool batt, 3 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"
35/8" Type X gypsum board5/8"
42-1/2" steel studs at 24" o.c.2.5"
5R-15 mineral wool batt—
65/8" Type X gypsum board5/8"
75/8" Type X gypsum board5/8"
85/8" 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.