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 N148
UL N1481.5-hr Fire RatingColumnLoad-Bearing
Design

Concrete Column — Spray-applied fireproofing

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

Cross-Section Diagram

12COLUMN PROTECTIONSECTION · NOT TO SCALE2 LAYERSsee legend for ① ② ③
Legend
1Cast-in-place concrete column(18")
2Spray-applied fireproofing(1.18")

Specifications

Fire Rating
1.5-Hour
Load Bearing
Yes
Total Thickness
20.36"
Source / Publisher
UL (Underwriters Laboratories)
Design Number
N148
Assembly Type
Column
Test Standard
ASTM E119
Construction Group
Concrete/Masonry
Number of Layers
2 layers

Applicable Codes

IBC 2024 §722IBC 2021 §722

Construction Summary

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

Material Layers

LayerMaterialThickness
1Cast-in-place concrete column18"
2Spray-applied fireproofing1.18"

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.