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Home / Assemblies / UL U316
UL U3161-hr Fire RatingWallLoad-Bearing
MasonryGypsum BoardLoad-Bearing WallDesign

Concrete Block Wall — single layer 5/8" Type X

UL-listed 1-hour fire-rated concrete block wall assembly. 12" CMU with Grouted cells, single layer of 5/8" Type X gypsum board each side.

Cross-Section Diagram

123414.38"WALL ASSEMBLYSECTION · NOT TO SCALE4 LAYERSsee legend for ① ② ③
Legend
15/8" Type X gypsum board(5/8")
212" CMU(11.625")
3Grouted cells
45/8" Type X gypsum board(5/8")

Specifications

Fire Rating
1-Hour
Load Bearing
Yes
Total Thickness
12.875"
Source / Publisher
UL (Underwriters Laboratories)
Design Number
U316
Assembly Type
Wall
Test Standard
UL 263
Construction Group
Concrete/Masonry
Number of Layers
4 layers

Applicable Codes

IBC 2024 Table 722.1IBC 2021 §722

Construction Summary

12" CMU with Grouted cells, single layer of 5/8" Type X gypsum board each side

Material Layers

LayerMaterialThickness
15/8" Type X gypsum board5/8"
212" CMU11.625"
3Grouted cells—
45/8" 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.