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SoundDown Duo Acoustic Intertenancy Floor System for Lightweight Structures
Description

SoundDown Duo acoustic floor has been designed and tested to achieve industry-leading performance in both airborne and impact noise, through a range of frequencies and a variety of floor coverings, including tiles.

This two-layer floor/ceiling system achieves an STC rating of 64 dB, an IIC rating of 62 dB and incorporates a 60/60/60 fire rated ceiling. SoundDown Duo is installed in conjunction with a timber or lightweight steel structural frame and timber joists.

SoundDown Duo comprises:

  • Maglok 20mm DragonBoard
  • SoundDown acoustic flooring battens
  • Vermiculite lightweight acoustic granules
  • Maglok 20mm DragonBoard
  • SG8 timber joists
  • Rondo STPC ceiling mounts assembled with acoustic clips
  • Mammoth R1.8 polyester insulation
  • Rondo 129 Furring Channel
  • 2 layers of 13mm USG Firestop
Key Features
  • Exceeds building code for fire and sound
  • Can be partially constructed as a cassette
  • Fully compatible with standard lightweight building methods
  • Unmatched sound attenuation
  • STC Rating: 64dB
  • IIC Rating: 62dB
Scope of Use

SoundDown Duo is a load-bearing, acoustic and fire rated intertenancy floor/ceiling system:

  • Used in conjunction with a timber or lightweight steel structural frame
  • As an acoustic intertenancy midfloor
  • As a fire rated intertenancy midfloor — achieves a maximum fire resistance rating, from below, of 60/60/60 
  • FFL: 85mm
  • Suitable for use with any floor covering, including tiles
Limitations on Use
  • Plasterboard must be manufactured to AS/NZS 2988

As an acoustic intertenancy midfloor:

  • The selected plasterboard must be installed in accordance with all manufacturer's requirements, including sealing with the recommended sealant

As a fire rated intertenancy midfloor:

  • Plasterboard must achieve a minimum material group number rating of 1-S and achieve a fire resistance rating of 60/60/60
Statement of Building Code Compliance

If designed, installed and maintained in accordance with all Build Anatomy Limited requirements, SoundDown Solo will comply with or contribute to compliance with the following performance claims:

  • B1 Structure: B1.3.1, B1.3.2, B1.3.3 (a, b, c, e, f, i, j, l, m, o, r), B1.3.4 (a, b, c, d, e)
  • B2 Durability: B2.3.1 (a), B2.3.2 (a) 
  • C3 Fire affecting areas beyond the fire source: C3.4 (a, b) 
  • C6 Structural stability: C6.2 (a, b, c, d)
  • F2 Hazardous Building Materials: F2.3.1
  • G6 Airborne and impact sound: G6.3.1
  • H1 Energy efficiency: H1.3.1 (a), H1.3.2E

See PASS statement for full information.

Other Performance Attributes
  • Airborne noise – STC: 64dB
  • Impact noise – IIC: 62dB
Documents
Design Guide: Duo

2021

PASS Product Statement: Duo

19160

Specification Guide: Duo

2021

Installation Guide: Duo

2021

Brochure: SoundDown Solo + Duo
Additional Information: Maglok Dragonboard

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