DeltaDualCore™ Panel Awning Systems Revision 1-12 26 (a) Two or more sides (making up at least one third of the awning perimeter) shall be “open”; that is the roof covering shall be more than 500 mm from another building or allotment boundary on at least two sides without enclosing these sides with a wall, privacy screen or the like within 500mm of the edge of the roof covering. A boundary along a road or public space such as parklands, lakes, rivers and the like (where the construction of buildings is unlikely) may be considered open regardless of proximity to the boundary subject to no vertical obstruction (wall, privacy screen or the like) within 500 mm of the edge of the roof covering. (b) The awning structure shall not provide direct vertical support to any part of the adjacent Class 1 building. (c) The portion of the awning system which is located within 900 mm of a site boundary shall consist solely of non-combustible components (subject to (d)) including: (i) Mineral wool (ii) Pre-finished steel sheeting with combustible surface finish not exceeding 1 mm thickness and with a spread of flame index no greater than 0 in accordance with NCC Clause H3D2(1)(e). (iii) Steel fixtures, gutters and the like (iv) Steel columns, beams, purlins and the like (v) Metallic flashing (d) As each sandwich panel used in the DeltaDualCore™ system constitutes a bonded laminate, the following restrictions shall apply to the portion of the roof system that is within 900mm of the site boundary: (i) The lamina’s shall be restricted to steel facings with mineral wool core, each of which has been tested to AS1530.1 and are deemed non-combustible (refer to AS1530.1 fire test certificates in Section Appendix A). (ii) Each adhesive layer may not exceed 1 mm in thickness and the total combined thickness of adhesive layers may not exceed 2 mm (refer to Section Appendix E which confirms adhesive layer thicknesses are within the required limits). (iii) The spread of flame index and the smoke developed index of the bonded laminated material as a whole shall not exceed 0 and 3 respectively (refer to AS1530.3 test certificates given in Section Appendix D). (iv) Only the portion of each DeltaDualCore™ panel containing a mineral wool core shall comply with items i) to iii) in accordance with NCC H3D2(1)(g) (the panel is not intended to comply with NCC H3D2(1)(g) as a whole). 4.5 Methodology The method of assessment is qualitative and quantitative to justify the risk and mitigate the hazard as identified in section 4.2. Performance requirements are addressed comparatively in accordance with BCA A2G2(1)(b) and A2G2(2)(d). Firstly, the DtS base case used for comparison must be established. The DtS base case shall present an equivalent DtS building which provides an acceptable benchmark against which to assess the proposed performance solution. The DtS base case will consist of a Class 1 house with a DtS Class 10a structure attached to the house. The comparison case will consist of an identical Class 1 house, at an identical distance from the site boundary, with the proposed Class 10a structure attached to the house. Refer to Figure 4-3.
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