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Home / Assemblies / UL P101
UL P1011.5-hr Fire RatingFloor/CeilingLoad-BearingSTC 65
ConcreteHigh STCDesign

Concrete Slab Floor/Ceiling — single layer None

UL-listed 1.5-hour fire-rated concrete slab floor/ceiling assembly. Cast-in-place concrete slab, single layer of None ceiling.

Cross-Section Diagram

1234FLOOR/CEILING ASSEMBLYSECTION · NOT TO SCALE4 LAYERSsee legend for ① ② ③
Legend
1Floor covering(varies)
22-1/2" lightweight concrete on steel deck(2-1/2")
3Cast-in-place concrete slab(6.0")
4None(0")

Specifications

Fire Rating
1.5-Hour
STC Rating
STC 65
Load Bearing
Yes
Total Thickness
7.5"
Source / Publisher
UL (Underwriters Laboratories)
Design Number
P101
Assembly Type
Floor/Ceiling
Test Standard
ASTM E119
Construction Group
Concrete/Masonry
Number of Layers
4 layers

Applicable Codes

IBC 2021 §722IBC 2024 Table 722.1

Construction Summary

Cast-in-place concrete slab, single layer of None ceiling

Material Layers

LayerMaterialThickness
1Floor coveringvaries
22-1/2" lightweight concrete on steel deck2-1/2"
3Cast-in-place concrete slab6.0"
4None0"

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.