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Home / Assemblies / UL X221
UL X2211.5-hr Fire RatingBeamLoad-Bearing
Design

Wood Beam — Gypsum board enclosure

UL-listed 1.5-hour fire-rated wood beam assembly. PSL beam with Gypsum board enclosure, 1.5-hour fire rating.

Cross-Section Diagram

12BEAM PROTECTIONSECTION · NOT TO SCALE2 LAYERSsee legend for ① ② ③
Legend
1PSL beam(20")
2Gypsum board enclosure(0.62")

Specifications

Fire Rating
1.5-Hour
Load Bearing
Yes
Total Thickness
21.24"
Source / Publisher
UL (Underwriters Laboratories)
Design Number
X221
Assembly Type
Beam
Test Standard
ASTM E119
Construction Group
Non-Combustible
Number of Layers
2 layers

Applicable Codes

NFPA 5000IBC 2024 §722

Construction Summary

PSL beam with Gypsum board enclosure, 1.5-hour fire rating

Material Layers

LayerMaterialThickness
1PSL beam20"
2Gypsum board enclosure0.62"

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.