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These gypsum wallboard system details are intended solely as technical support incident to the sale and use of National Gypsum Company products. They may be used as a reference by architects, engineers, other design professionals, contractors, building code officials, or other competent construction industry trade personnel considering the selection, specification and use of National Gypsum Company products in these systems.
Table of Contents Acoustical Terms and Concepts 1 Steel Stud Partitions with Framing 16" o.c. 5 Partitions with Lightweight Gypsum Board Steel Stud Partitions with Framing 24" o.c. Partitions with Lightweight Gypsum Board 13 19 25 Steel Stud Chase Walls 29 Shaftwall Partitions 33 Wood Stud Partitions with Framing 16" o.c. 41 Partitions with Lightweight Gypsum Board 47 Wood Stud Partitions with Framing 24" o.c.
Acoustical Terms and Concepts Transmission of Airborne Sound Sound Transmission Class Airborne sound is acoustical energy generated by a source and transmitted by vibration through the air. The vibrations create sound pressure fluctuations that are detected by a receiver. Sound is characterized by its frequency, which determines the pitch of the sound, and by the intensity of the pressure fluctuations, which determines how loud the sound is perceived to be.
Acoustical Terms and Concepts Guidelines for Optimum Performance and Sound Reduction Sound Isolation Construction Stagger gypsum board joints from one side of the partition to the other. Allow a 1/4" gap along all wall perimeter edges and completely seal 1/4" gap with acoustical sealant. Refrain from wall penetrations when possible. Limit necessary wall penetrations to one per stud cavity. Arrows denote flanking paths for sound. Seal all penetrations with acoustical sealant or putty pads.
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Ceiling Attenuation Class for Gridstone Ceiling Assemblies Figure 72 Figure 72 Sound Source CAC-41 Sound Source NGC 6000001 CAC-46 NGC 6098001 Ceiling: Suspended Grid with 2' x 4' x 5/16" Gridstone Hi-Strength Ceiling Panels Insulation: None Ceiling: Suspended Grid with 2' x4' x 1/2" Gridstone Ceiling Panels Insulation: None Figure 72 Figure 72 Sound Source CAC-44 Ceiling: Sound Source NGC 6013012 Suspended Grid with 2' x 2' x 1/2" Gridstone Ceiling Panels Insulation: None CAC-51 NGC 601
Ceiling Attenuation Class for Gridstone Ceiling Assemblies Figure 72 Sound Source CAC-53 Ceiling: NGC 6013014 Suspended Grid with 2' x 2' x 1/2" Gridstone Ceiling Panels Insulation: 3-1/2" glass fiber full coverage over ceiling 72
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