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Home / Assemblies / UL C117
UL C1172-hr Fire RatingJoint System
Mineral WoolDesign

Wall-to-Wall Joint — Intumescent System

UL-listed 2-hour fire-rated wall-to-wall joint system. Wall-to-Wall Joint, 1-1/2" max width, Intumescent putty pad with mineral wool backer.

Cross-Section Diagram

12FIRE-RATED JOINTSECTION · NOT TO SCALE2 LAYERSsee legend for ① ② ③
Legend
1Mineral wool backer(2")
2Intumescent putty pad(1/4")

Specifications

Fire Rating
2-Hour
Load Bearing
No
Total Thickness
Varies
Source / Publisher
UL (Underwriters Laboratories)
Design Number
C117
Assembly Type
Joint System
Test Standard
UL 2079
Construction Group
N/A
Number of Layers
2 layers

Applicable Codes

IBC 2021 §714IBC 2021 §715

Construction Summary

Wall-to-Wall Joint, 1-1/2" max width, Intumescent putty pad with mineral wool backer

Material Layers

LayerMaterialThickness
1Mineral wool backer2"
2Intumescent putty pad1/4"

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.