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Home / Assemblies / UL N103
UL N1031.5-hr Fire RatingBeamLoad-Bearing
Design

Concrete Beam — Spray-applied fireproofing

UL-listed 1.5-hour fire-rated concrete beam assembly. Cast-in-place concrete beam with Spray-applied fireproofing, 1.5-hour fire rating.

Cross-Section Diagram

12BEAM PROTECTIONSECTION · NOT TO SCALE2 LAYERSsee legend for ① ② ③
Legend
1Cast-in-place concrete beam(19")
2Spray-applied fireproofing(1.1")

Specifications

Fire Rating
1.5-Hour
Load Bearing
Yes
Total Thickness
21.2"
Source / Publisher
UL (Underwriters Laboratories)
Design Number
N103
Assembly Type
Beam
Test Standard
ASTM E119
Construction Group
Concrete/Masonry
Number of Layers
2 layers

Applicable Codes

NFPA 5000IBC 2024 §722

Construction Summary

Cast-in-place concrete beam with Spray-applied fireproofing, 1.5-hour fire rating

Material Layers

LayerMaterialThickness
1Cast-in-place concrete beam19"
2Spray-applied fireproofing1.1"

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.