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Home / Assemblies / UL C114
UL C1141-hr Fire RatingJoint System
Design

Wall-to-Wall Joint — Cementitious System

UL-listed 1-hour fire-rated wall-to-wall joint system. Wall-to-Wall Joint, 3/4" max width, Cementitious mortar fill with ceramic fiber backer.

Cross-Section Diagram

12FIRE-RATED JOINTSECTION · NOT TO SCALE2 LAYERSsee legend for ① ② ③
Legend
1Ceramic fiber backer(1")
2Cementitious mortar fill(1/2")

Specifications

Fire Rating
1-Hour
Load Bearing
No
Total Thickness
Varies
Source / Publisher
UL (Underwriters Laboratories)
Design Number
C114
Assembly Type
Joint System
Test Standard
CAN/ULC-S115
Construction Group
N/A
Number of Layers
2 layers

Applicable Codes

IBC 2024 §714IBC 2021 §715

Construction Summary

Wall-to-Wall Joint, 3/4" max width, Cementitious mortar fill with ceramic fiber backer

Material Layers

LayerMaterialThickness
1Ceramic fiber backer1"
2Cementitious mortar fill1/2"

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.