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Home / Assemblies / UL X117
UL X1173-hr Fire RatingBeamLoad-Bearing
Structural SteelDesign

Steel Beam — Gypsum board enclosure

UL-listed 3-hour fire-rated steel beam assembly. W-shape steel beam with Gypsum board enclosure, 3-hour fire rating.

Cross-Section Diagram

12BEAM PROTECTIONSECTION · NOT TO SCALE2 LAYERSsee legend for ① ② ③
Legend
1W-shape steel beam(24")
2Gypsum board enclosure(1.56")

Specifications

Fire Rating
3-Hour
Load Bearing
Yes
Total Thickness
27.12"
Source / Publisher
UL (Underwriters Laboratories)
Design Number
X117
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 Gypsum board enclosure, 3-hour fire rating

Material Layers

LayerMaterialThickness
1W-shape steel beam24"
2Gypsum board enclosure1.56"

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.