Delta MW and EPS-FR Panel Awning and Patio Roof System Revision 1-4 23 (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 sandwich panel which is located within 900 mm of a site boundary shall be Panel Type I and consist solely of non-combustible components (subject to (d)) including: (i) DeltaTrim-MW or DeltaOrb-MW panels (ii) Steel fixtures, gutters and the like (iii) Steel columns, beams, purlins and the like (iv) Metallic flashing (d) The following restrictions shall apply to Panel Type I: (i) Each lamina shall be non-combustible. For clarity this includes low carbon steel (see AS1530.1 test in Section C.2) or mineral wool (see AS1530.1 test in Section C.1). As permitted under Section 3.3.2, low carbon steel from any manufacturer may be used and the steel may include a surface finish not exceeding 1 mm thickness with a spread of flame index no greater than 0. (ii) Each adhesive layer may not exceed 1 mm in thickness and the total combined thickness of adhesive layers shall not exceed 2 mm. (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 ). 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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