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Home / Assemblies / UL C135
UL C1354-hr Fire RatingJoint System
Design

Through-Penetration Firestop — Cementitious System

UL-listed 4-hour fire-rated through-penetration firestop system. Through-Penetration Firestop, 1-1/2" max width, Cementitious mortar fill.

Cross-Section Diagram

1FIRE-RATED JOINTSECTION · NOT TO SCALE1 LAYERsee legend for ① ② ③
Legend
1Cementitious mortar fill(5/8")

Specifications

Fire Rating
4-Hour
Load Bearing
No
Total Thickness
Varies
Source / Publisher
UL (Underwriters Laboratories)
Design Number
C135
Assembly Type
Joint System
Test Standard
UL 2079
Construction Group
N/A
Number of Layers
1 layers

Applicable Codes

NFPA 5000IBC 2021 §715

Construction Summary

Through-Penetration Firestop, 1-1/2" max width, Cementitious mortar fill

Material Layers

LayerMaterialThickness
1Cementitious mortar fill5/8"

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.