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Home / Assemblies / UL N121
UL N1212-hr Fire RatingBeamLoad-Bearing
ConcreteDesign

Concrete Beam — Spray-applied fireproofing

UL-listed 2-hour fire-rated concrete beam assembly. Precast concrete beam with Spray-applied fireproofing, 2-hour fire rating.

Cross-Section Diagram

12BEAM PROTECTIONSECTION · NOT TO SCALE2 LAYERSsee legend for ① ② ③
Legend
1Precast concrete beam(17")
2Spray-applied fireproofing(1.15")

Specifications

Fire Rating
2-Hour
Load Bearing
Yes
Total Thickness
19.3"
Source / Publisher
UL (Underwriters Laboratories)
Design Number
N121
Assembly Type
Beam
Test Standard
UL 263
Construction Group
Concrete/Masonry
Number of Layers
2 layers

Applicable Codes

IBC 2021 §722NFPA 5000

Construction Summary

Precast concrete beam with Spray-applied fireproofing, 2-hour fire rating

Material Layers

LayerMaterialThickness
1Precast concrete beam17"
2Spray-applied fireproofing1.15"

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.