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TIMBER FRAME COMBINATIONS

SEPARATING
WALLS
SEPARATING FLOORS
E-FT-1
E-FT-2
E-FT-4
E-FT-5
E-FT-7
E-FT-8
E-FT-3
E-FT-6
E-FC-2E-FS-1
E-WT-1 W 1 W 1
E-WT-2 W 1 W 1
E-WT-3 F F W 1 W 1
E-WT-4 F F W 1 W 1

EFFECTIVE FROM MIDNIGHT ON 21 JUNE 2018

KEY
F Only the separating floor requires pre-completion sound testing
W Only the separating wall requires pre-completion sound testing.
1 Lightweight steel and timber frame walls may be constructed above in-situ poured concrete floors. The lightweight walls built directly off the concrete floors may be registered as robustdetails® provided:
  • they meet all other requirements of the robustdetails®, including flanking constructions
  • the principles of the raft foundation junction are followed. As such, the concrete of the floor must have a mass of 365 kg/m2 (min), and a floating floor treatment must be provided.
Walls constructed to the soffit of in-situ poured concrete floors can not be registered as robust details™ and may be subject to pre-completion sound testing.

Decibel Ratings
E-xx-nn Building Regs
E-xx-nn + 3dB
E-xx-nn + 5dB
E-xx-nn + 8dB
Invalid Combination
Building Regs Combination
+ 3dB Combination
+ 5dB Combination

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