B
HomeLibrariesCopilotSearchProjectsBookmarks
FeedbackHelp Desk
Libraries
Building Codes
Code LibraryIBC — BuildingIRC — ResidentialIFC — FireIPC — PlumbingIMC — MechanicalIFGC — Fuel GasIECC — EnergyNEC — ElectricalModel Codes
Specifications
CSI SpecificationsDOT SpecsTransit SpecsUSACE
Standards
TransportationRailroadFire SafetyAccessibilityStructural
Tools & References
DiagramsAssembliesProductsCalculatorsChecklistsPermits
PricingLog in
Home / Assemblies / UL G105
UL G1051.5-hr Fire RatingColumnLoad-Bearing
Design

Wood Column — Fire-retardant treated wood cladding

UL-listed 1.5-hour fire-rated wood column assembly. Solid sawn timber column with Fire-retardant treated wood cladding, 1.5-hour fire rating.

Cross-Section Diagram

12COLUMN PROTECTIONSECTION · NOT TO SCALE2 LAYERSsee legend for ① ② ③
Legend
1Solid sawn timber column(12")
2Fire-retardant treated wood cladding(2.25")

Specifications

Fire Rating
1.5-Hour
Load Bearing
Yes
Total Thickness
16.5"
Source / Publisher
UL (Underwriters Laboratories)
Design Number
G105
Assembly Type
Column
Test Standard
CAN/ULC-S101
Construction Group
Non-Combustible
Number of Layers
2 layers

Applicable Codes

IBC 2021 §722NFPA 5000

Construction Summary

Solid sawn timber column with Fire-retardant treated wood cladding, 1.5-hour fire rating

Material Layers

LayerMaterialThickness
1Solid sawn timber column12"
2Fire-retardant treated wood cladding2.25"

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.