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Home / Assemblies / UL X313
UL X3131-hr Fire RatingColumnLoad-Bearing
Mineral WoolDesign

Steel Column — Spray-applied mineral fiber

UL-listed 1-hour fire-rated steel column assembly. Steel pipe column with Spray-applied mineral fiber, 1-hour fire rating.

Cross-Section Diagram

12COLUMN PROTECTIONSECTION · NOT TO SCALE2 LAYERSsee legend for ① ② ③
Legend
1Steel pipe column(16")
2Spray-applied mineral fiber(0.65")

Specifications

Fire Rating
1-Hour
Load Bearing
Yes
Total Thickness
17.3"
Source / Publisher
UL (Underwriters Laboratories)
Design Number
X313
Assembly Type
Column
Test Standard
ASTM E119
Construction Group
Non-Combustible
Number of Layers
2 layers

Applicable Codes

NFPA 5000IBC 2024 §722

Construction Summary

Steel pipe column with Spray-applied mineral fiber, 1-hour fire rating

Material Layers

LayerMaterialThickness
1Steel pipe column16"
2Spray-applied mineral fiber0.65"

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.