USG Structural Solutions

A New Level
Of Performance

USG Structural Panels are high-strength, reinforced concrete panels for use in noncombustible construction. Lighter than precast or poured concrete, USG Structural Panels install like wood sheathing and are mold-, moisture- and termite-resistant. Providing a faster, easier and more efficient way to build floors.

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USG Structural Panel Applications

Physical and Mechanical PropertiesTest StandardApproximate Values Standard (Metric)
NoncombustibilityASTM E136-12 (unmodified)
CAN/ULC-S114
Passed
Passed
Surface-burning characteristics
(flame spread/smoke developed)
ASTM E84, CAN/ULC S1020/0
Weight (3/4in. [19mm] thickness)ASTM D10375.3 lb./ft.2 (26 kg/m2)
Mold resistanceASTM D3273, ASTM G2110, 0
Termite resistanceAWPA Standard E1-139.8
Low VOC emissionsCDHP/EHLB/Standard Method V1.1-2010aCompliant
Concentrated loadASTM E661550 lb. (2.45 kN) static 0.108 in. (2.7 mm) max. deflection @ 200 lb. (0.89 kN)
Water absorptionbASTM C1185, Sec. 5.2.3.1 <15.0%
Linear variation with change in moisture
(25% to 90% relative humididty)
ASTM C1185, Sec. 8<0.10%

(a) Reference Standard: California Department of Public Health CDPH/EHLB/Standard Method Version 1.1, 2010 (Emission testing method for CA Specification 01350).

(b) Absorption measured from equilibrium conditioning followed by immersion in water for 48 hours.

Fire-Resistant-Rated Systems

SystemHour RatingUL DesignHighlights
Floor/Ceiling 1 hour G556
  • Min 6”C-joist, bare USGSP allows for variety of floor finishes
  • Without affecting fire-resistance
Floor/Ceiling 2 hour H505
  • Min 8”C-joist, bare USGSP allows for variety of floor finishes
  • Without affecting fire-resistance
Roof/Ceiling 1 hour P561
  • No Thermal Barrier needed – Saves Time
Roof/Ceiling 2 hour P573
  • 48” O.C. Joist Spacing
  • No Thermal Barrier needed
  • The only noncombustible nail base for shingle applications
Modular System 2 hour H501
  • The only noncombustible floor/ceiling assembly for modular assemblies.

Subfloor Systems – Acoustical Performance

UL Designa Hour Rating Floor Finish Underlayment Channel Type USG Sheetrock® Brand Firecode® C Core STC/FSTC IIF/FIIC
G556 (1 hour) Carpet & Pad RC-1 5/8 in. – 1 layer 56 65
G556 (2 hours) Carpet & Pad USG Levelrock® DWSSd 5/8 in. – 1 layer 60b 79b
G556 (2 hours) Engineered Wood USG Fiberock® DWSSd 5/8 in. – 1 layer 62b 53–56b
G556 (2 hours) Ceramic Tile USG Fiberock® DWSSd 5/8 in. – 1 layer 56–61b 52–59b
G556 (2 hours) Carpet & Pad RC-1 5/8 in. – 2 layers 57b 68–69b

(a) Designs use USG Structural Panel Concrete Subfloor.

(b) FSTC / FIIC are field acoustical tests in accordance with ASTM and ASTM E1004.

(c) USG Durock Brand Tile Membrane and an acoustical mat are to be used as part of the underlayment system.

(d) DWSS: Drywall suspension system.

Product Evaluation Report Category Applications Properties Evaluated
Subfloor
Walls
Approved Fasteners
Uniform Load
Diaphragm Shear
Shear Walls
Floor Anchorage
USG Structural Panel Concrete Subfloor PER-13067 Mid-Rise
Custom Home
Modular
Theater
Mezzanine
Product Evaluation Report Category Applications Properties Evaluated
Low-slope Roofs
Steep-Slope Roofs
Balconies
Canopies
Approved Fasteners
Uniform Load
Diaphragm Shear
Wind Up Lift
Nail-Base
Balcony Membranes
USG Structural Panel Concrete Roof Deck PER-14076 Mid-Rise
Custom Home
Mezzanine
Product Evaluation Report Category Applications Properties Evaluated
Basement Wall
Crawl Space
Cellars
Storm Shelters
Approved Fasteners
Uniform Load
Shear Walls
Waterproofing
Membrane
USG Structural Panel Foundation Wall PER-15092 Mid-Rise