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Home / Assemblies / UL X259
UL X2591-hr Fire RatingColumnLoad-Bearing
Structural SteelDesign

Steel Column — Intumescent coating

UL-listed 1-hour fire-rated steel column assembly. HSS round steel column with Intumescent coating, 1-hour fire rating.

Cross-Section Diagram

12COLUMN PROTECTIONSECTION · NOT TO SCALE2 LAYERSsee legend for ① ② ③
Legend
1HSS round steel column(16")
2Intumescent coating(0.07")

Specifications

Fire Rating
1-Hour
Load Bearing
Yes
Total Thickness
16.14"
Source / Publisher
UL (Underwriters Laboratories)
Design Number
X259
Assembly Type
Column
Test Standard
ASTM E119
Construction Group
Non-Combustible
Number of Layers
2 layers

Applicable Codes

IBC 2021 §722IBC 2024 §722

Construction Summary

HSS round steel column with Intumescent coating, 1-hour fire rating

Material Layers

LayerMaterialThickness
1HSS round steel column16"
2Intumescent coating0.07"

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.