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Home / Assemblies / UL X100
UL X1001-hr Fire RatingBeamLoad-Bearing
Structural SteelDesign

Steel Beam — Spray-applied cementitious fireproofing

UL-listed 1-hour fire-rated steel beam assembly. W-shape steel beam with Spray-applied cementitious fireproofing, 1-hour fire rating.

Cross-Section Diagram

12BEAM PROTECTIONSECTION · NOT TO SCALE2 LAYERSsee legend for ① ② ③
Legend
1W-shape steel beam(15")
2Spray-applied cementitious fireproofing(0.51")

Specifications

Fire Rating
1-Hour
Load Bearing
Yes
Total Thickness
16.02"
Source / Publisher
UL (Underwriters Laboratories)
Design Number
X100
Assembly Type
Beam
Test Standard
ASTM E119
Construction Group
Non-Combustible
Number of Layers
2 layers

Applicable Codes

IBC 2024 §722NFPA 5000

Construction Summary

W-shape steel beam with Spray-applied cementitious fireproofing, 1-hour fire rating

Material Layers

LayerMaterialThickness
1W-shape steel beam15"
2Spray-applied cementitious fireproofing0.51"

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.