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Home / Assemblies / GA WP1201
GA WP12011-hr Fire RatingWallLoad-BearingSTC 39
Steel StudGypsum BoardLoad-Bearing WallDesign

GA Wood Stud Partition — 1 layer 5/8" Type X

Gypsum Association file WP1201 — 1-hour fire-rated wood stud partition. GA file WP1201: 3-5/8" steel studs at 24" o.c., 1 layer of 5/8" Type X gypsum board each side.

Cross-Section Diagram

1232.75"WALL ASSEMBLYSECTION · NOT TO SCALE3 LAYERSsee legend for ① ② ③
Legend
15/8" Type X gypsum board(5/8")
23-5/8" steel studs at 24" o.c.
35/8" Type X gypsum board(5/8")

Specifications

Fire Rating
1-Hour
STC Rating
STC 39
Load Bearing
Yes
Total Thickness
4.31"
Source / Publisher
GA (Gypsum Association)
Design Number
WP1201
Assembly Type
Wall
Test Standard
ASTM E119
Construction Group
Light Frame
Number of Layers
3 layers

Applicable Codes

NFPA 5000IBC 2024 §722

Construction Summary

GA file WP1201: 3-5/8" steel studs at 24" o.c., 1 layer of 5/8" Type X gypsum board each side

Material Layers

LayerMaterialThickness
15/8" Type X gypsum board5/8"
23-5/8" steel studs at 24" o.c.—
35/8" Type X gypsum board5/8"

Important Notice

This assembly listing is for reference only. Always verify against the current GA Fire Resistance Design Manual database before specifying in construction documents. Material substitutions may void the fire rating. Consult with a qualified fire protection engineer for project-specific requirements.