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Home / Assemblies / UL C123
UL C1234-hr Fire RatingJoint System
Design

Wall-to-Wall Joint — Spray-applied System

UL-listed 4-hour fire-rated wall-to-wall joint system. Wall-to-Wall Joint, 1/2" max width, Spray-applied firestop material.

Cross-Section Diagram

1FIRE-RATED JOINTSECTION · NOT TO SCALE1 LAYERsee legend for ① ② ③
Legend
1Spray-applied firestop material(3/8")

Specifications

Fire Rating
4-Hour
Load Bearing
No
Total Thickness
Varies
Source / Publisher
UL (Underwriters Laboratories)
Design Number
C123
Assembly Type
Joint System
Test Standard
UL 2079
Construction Group
N/A
Number of Layers
1 layers

Applicable Codes

NFPA 5000IBC 2024 §714

Construction Summary

Wall-to-Wall Joint, 1/2" max width, Spray-applied firestop material

Material Layers

LayerMaterialThickness
1Spray-applied firestop material3/8"

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.