B
HomeLibrariesCopilotSearchProjectsBookmarks
FeedbackHelp Desk
Libraries
Building Codes
Code LibraryIBC — BuildingIRC — ResidentialIFC — FireIPC — PlumbingIMC — MechanicalIFGC — Fuel GasIECC — EnergyNEC — ElectricalModel Codes
Specifications
CSI SpecificationsDOT SpecsTransit SpecsUSACE
Standards
TransportationRailroadFire SafetyAccessibilityStructural
Tools & References
DiagramsAssembliesProductsCalculatorsChecklistsPermits
PricingLog in
Home / Assemblies / UL N142
UL N1424-hr Fire RatingBeamLoad-Bearing
Design

Concrete Beam — Spray-applied fireproofing

UL-listed 4-hour fire-rated concrete beam assembly. Post-tensioned concrete beam with Spray-applied fireproofing, 4-hour fire rating.

Cross-Section Diagram

12BEAM PROTECTIONSECTION · NOT TO SCALE2 LAYERSsee legend for ① ② ③
Legend
1Post-tensioned concrete beam(24")
2Spray-applied fireproofing(2.5")

Specifications

Fire Rating
4-Hour
Load Bearing
Yes
Total Thickness
29"
Source / Publisher
UL (Underwriters Laboratories)
Design Number
N142
Assembly Type
Beam
Test Standard
ASTM E119
Construction Group
Concrete/Masonry
Number of Layers
2 layers

Applicable Codes

IBC 2024 §722NFPA 5000

Construction Summary

Post-tensioned concrete beam with Spray-applied fireproofing, 4-hour fire rating

Material Layers

LayerMaterialThickness
1Post-tensioned concrete beam24"
2Spray-applied fireproofing2.5"

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.