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Home / Assemblies / UL N157
UL N1571.5-hr Fire RatingColumnLoad-Bearing
ConcreteDesign

Concrete Column — None (concrete cover)

UL-listed 1.5-hour fire-rated concrete column assembly. Precast concrete column with None (concrete cover), 1.5-hour fire rating.

Cross-Section Diagram

12COLUMN PROTECTIONSECTION · NOT TO SCALE2 LAYERSsee legend for ① ② ③
Legend
1Precast concrete column(13")
2None (concrete cover)(2.25")

Specifications

Fire Rating
1.5-Hour
Load Bearing
Yes
Total Thickness
17.5"
Source / Publisher
UL (Underwriters Laboratories)
Design Number
N157
Assembly Type
Column
Test Standard
UL 263
Construction Group
Concrete/Masonry
Number of Layers
2 layers

Applicable Codes

NFPA 5000IBC 2021 §722

Construction Summary

Precast concrete column with None (concrete cover), 1.5-hour fire rating

Material Layers

LayerMaterialThickness
1Precast concrete column13"
2None (concrete cover)2.25"

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.