Attachment 7 - Acoustic Report

9.2.5       Entry Doors
The entry door construction recommendations from QDC MP4.4 are included in the table below.
Note that these are not the only allowable methods of construction for the development, and
alternative constructions to achieve the required Rw ratings may also be provided. QDC Noise
Categories are nominated in Table 14.

                                     Table 17: QDC typical entry door construction

    QDC
                 Entry
   Noise                                               Minimum Entry Door Treatments
                Door Rw
  Category
                            Fixed so as to overlap the frame or rebate of the frame by not less than 10mm, fitted with
                            the full perimeter acoustically rated seals and constructed of –
        2            33
                            (i) solid core, wood, particleboard or blockboard not less than 45mm thick; and/or
                            (ii) acoustically laminated glass not less than 10.38mm thick.
                            Fixed so as to overlap the frame or rebate of the frame, constructed of –
                            (i) wood, particleboard or blockboard not less than 33mm thick; or
                            (ii) compressed fibre reinforced sheeting not less than 9mm thick; or
        1            28
                            (iii) other suitable material with a mass per unit area not less than 24.4kg/m2; or
                            (iv) solid core timber door not less than 35mm thick fitted with full perimeter acoustically
                            rated seals.
        0            N/A    Standard Construction


9.2.6       Floors
The exposed floor construction recommendations from QDC MP4.4 are included in the table below.
Note that these are not the only allowable methods of construction for the development, and
alternative constructions to achieve the required Rw ratings may also be provided. QDC Noise
Categories are nominated in Table 14.

                                    Table 18: QDC typical exposed floor construction

    QDC
   Noise         Floor Rw                                  Minimum Floor Treatments
  Category
                             Concrete slab at least 100mm thick
                             OR
                             Tongued and grooved boards at least 19mm thick with:
                             (i) 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
        2             45     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.
     0/1             N/A     Standard Construction

Refers to floors of habitable rooms which are part of the external façade of the building i.e. rooms
which overhang the level below.




 2019253 R01A Lot 2 & 3 Myall Street, Cooroy RTN ENV.docx © Acoustic Works 2019                                  Page 26