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Home / Assemblies / UL C101
UL C1011-hr Fire RatingJoint System
Mineral WoolDesign

Floor-to-Wall Joint — Intumescent System

UL-listed 1-hour fire-rated floor-to-wall joint system. Floor-to-Wall Joint, 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(3/8")

Specifications

Fire Rating
1-Hour
Load Bearing
No
Total Thickness
Varies
Source / Publisher
UL (Underwriters Laboratories)
Design Number
C101
Assembly Type
Joint System
Test Standard
ASTM E814
Construction Group
N/A
Number of Layers
2 layers

Applicable Codes

NFPA 5000IBC 2024 §714

Construction Summary

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

Material Layers

LayerMaterialThickness
1Mineral wool backer2"
2Intumescent putty pad3/8"

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.