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USG Assembly Library — Fire-Rated & Acoustical Wall and Ceiling Specifications

Access the complete USG assembly database: UL-listed fire-rated designs, STC-rated acoustical assemblies, CAD details, and submittal-ready documentation for architects, engineers, and specifiers.

Why the Assembly Library

Specification Confidence Starts with Tested Assemblies

Every wall and ceiling assembly in this library has been tested by an independent, accredited laboratory and carries a verifiable third-party certification number. When you specify from the USG Assembly Library, you're not specifying aspirational performance — you're specifying tested, documented, enforceable performance that your AHJ will accept.

500+
UL Design Numbers
200+
STC-Rated Assemblies
CAD
Details Included
Specifying USG fire-rated assemblies

Search by UL Design Number, assembly type, fire rating, or STC value

Fire-Rated Walls Acoustical Walls Shaft Walls Ceiling Assemblies Floor/Ceiling Systems

Fire-Rated Wall Assemblies

View All 140+
Fire-Rated Wall

Non-Load-Bearing Interior Wall

2-hour fire-rated non-load-bearing steel stud partition with Sheetrock® Firecode® X panels. Standard commercial demising wall for offices and corridor separations.

2-Hr Fire Rating UL Design U419 STC 47
↓ Download Submittal
Fire-Rated Wall

Healthcare Patient Room Separation

1-hour fire-rated patient room separation wall meeting IBC Group I-2 requirements. Mold Tough® panels rated for healthcare environments, with smoke-seal at top track.

1-Hr Fire Rating IBC Group I-2 STC 50
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Fire-Rated Wall

Exterior Sheathing Fire Barrier

USG Securock® glass-mat sheathing system providing 2-hour fire resistance at the exterior building envelope. Meets NFPA 285 wall system testing for Type I-A and I-B construction.

2-Hr Barrier NFPA 285 Exterior
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Shaft Wall & Area Separation Systems

View All 60+
Shaft Wall

Elevator Shaft / Stairwell Enclosure

USG 1-inch Sheetrock® Shaft Wall Liner single-layer shaft wall system for elevator and stairwell enclosures up to 50 feet. Snap-stud framing — no scaffolding required on shaft side.

2-Hr Fire Rating UL V438 Up to 50 ft
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Area Separation

Multi-Family Area Separation Wall

USG 3-hour area separation wall system for townhome and multi-family wood-frame construction. Collapse protection header allows wall to remain standing even if adjacent unit structure fails.

3-Hr Fire Rating IBC § 706 Collapse Resistant
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Horizontal Shaft

Horizontal Shaft Wall Liner System

USG Horizontal Shaft Wall Liner system for mechanical shaft applications with horizontal C-H studs. Provides 2-hour fire resistance with continuous gypsum liner panels spanning between framing members.

2-Hr Fire Rating Mechanical Shafts Horizontal
↓ Download Submittal

Acoustical (STC-Rated) Wall Assemblies

View All 90+
Acoustical Wall

Hotel Guest Room Party Wall — STC 60

Sheetrock® SoundBreak XP double-stud assembly with staggered framing and 3.5" batt insulation. Exceeds IBC STC 50 minimum for luxury hotel markets where noise complaints carry brand liability.

STC 60 Double Stud 1-Hr Fire
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Acoustical Wall

Open-Plan Office Speech Privacy — STC 50

Single-stud Sheetrock® SoundBreak XP assembly meeting minimum IBC residential and office occupancy STC requirements. Balances acoustic performance, cost, and framing efficiency.

STC 50 Single Stud IBC Minimum
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Acoustical Ceiling

Resilient Channel Ceiling — STC 55 / IIC 52

Double-layer Sheetrock® panels on resilient channels below wood joist floor system. Combined fire and acoustic rated ceiling for multi-family residential dwelling separations.

STC 55 IIC 52 1-Hr Fire
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Can't Find the Assembly You Need?

Our technical team can design a custom assembly for your specific fire rating, STC, and structural requirements — with full documentation for AHJ review.

Request Custom Assembly Design