Appendix F- Acousitc Report · MCU21/0117.01

Cooroy Villas Pty Ltd
Environmental Traffic and Rail Noise Level Impact Assessment for Proposed Residential Unit Development,
54 Elm Street and 5 Pearl Street, Cooroy                                                                    Page 22 of 36

                      viii.           a row of at least 70mm x 35mm timber studs or 64mm steel studs at
                                                600mm centres, spaced at least 20mm from the masonry wall;
                                      and
                              (ii)      mineral insulation or glass wool insulation at least 50mm thick with a
                                        density of at least 11 kg/m3 positioned between studs; and
                              (iii)     One layer of plasterboard at least 10mm thick fixed to outside face of
                                        studs
                           OR
                           Single leaf of brick masonry at least 110mm thick with at least 13mm thick
                           render on each face
                           OR
                           Concrete brickwork at least 110mm thick
                           OR
                           In-situ concrete at least 100mm thick
                           OR
                           Precast concrete at least 100mm thick and without joints.
              o    Roof Rw 38:
                       ▪ concrete or terracotta tile or metal sheet roof with sarking, plasterboard ceiling
                           at least 10mm thick fixed to ceiling cavity, mineral insulation or glass wool
                           insulation at least 50mm thick with a density of at least 11 kg/m 3.
              o    Floors Rw 45:
                       ▪ concrete slab at least 100mm thick
                           OR
                           Tongued and grooved boards at least 19mm thick with:
                       ix.        timber joists not less than 175mm x 50mm; and
                           (ii)      mineral insulation or glass wool insulation at least 75mm thick with a
                                     density of at least 11kg/m3 positioned between joists and laid on
                                     plasterboard at least 10mm thick fixed to underside of joists; and
                           (iii)     mineral insulation or glass wool insulation at least 25mm thick with a
                                     density of at least 11kg/m3 laid over entire floor, including tops of joists
                                     before flooring is laid; and
                           (iv)      secured to battens at least 75mm x 50mm; and
                           (v)       the assembled flooring laid over the joists, but not fixed to them, with
                                     battens lying between the joists.
              o    Entry doors Rw 33:
                       ▪ fixed so as to overlap the frame or rebate of the frame by not less than 10mm,
                           fitted with full perimeter acoustically rated seals and constructed of –
                        x.        solid core, wood, particleboard or blockboard not less than 45mm thick;
                                  and/or
                           (ii)      acoustically laminated glass not less than 10.38mm thick.


TRAFFIC NOISE CONTROL

In accordance with the above the Unit 1 terrace exceeds the traffic noise limit criteria by 5.4 dB(A)
LA10,18H free field and the following facades exceed the 60 dB(A) L A10,18H facade corrected noise limit by
the nominated values:

     •    Unit 1 western facade, 6 dB(A) noise limit exceedance, requiring a noise reduction of 8.2 dB(A)
          when ground attenuation is disregarded;
     •    Unit 1 northern facade, 2.2 dB(A) noise limit exceedance, requiring a noise reduction of 4.6
          dB(A) when ground attenuation is disregarded;
     •    Unit 2 northern facade, 0.8 dB(A) noise limit exceedance, requiring a noise reduction of 3.6
          dB(A) when ground attenuation is disregarded.




David Moore & Associates Pty Ltd                                          Our reference: R23089.docx/D3819/Rev.0/17.01.24