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Home / Assemblies / UL X283
UL X2834-hr Fire RatingColumnLoad-Bearing
Structural SteelDesign

Steel Column — Concrete encasement

UL-listed 4-hour fire-rated steel column assembly. HSS round steel column with Concrete encasement, 4-hour fire rating.

Cross-Section Diagram

12COLUMN PROTECTIONSECTION · NOT TO SCALE2 LAYERSsee legend for ① ② ③
Legend
1HSS round steel column(14")
2Concrete encasement(3.5")

Specifications

Fire Rating
4-Hour
Load Bearing
Yes
Total Thickness
21"
Source / Publisher
UL (Underwriters Laboratories)
Design Number
X283
Assembly Type
Column
Test Standard
CAN/ULC-S101
Construction Group
Non-Combustible
Number of Layers
2 layers

Applicable Codes

IBC 2024 §722NFPA 5000

Construction Summary

HSS round steel column with Concrete encasement, 4-hour fire rating

Material Layers

LayerMaterialThickness
1HSS round steel column14"
2Concrete encasement3.5"

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.