b'Analysis of Minor VariationsB.1Variation to tested constructionThe proposed construction shall be a roof system as tested in FSZ 2411 when subject to the variations listed below; The pitch of the roof may vary from 45 degrees tested to a roof with a pitch of 8 to 75 degrees.The roof panel top steel skin shall vary from the tested Delta Trim roof profile to Delta Orb roof profile as shown in Figure 1 and 2. The panel shall be a minimum of 100mm thick as per Figures 2 and 4. Variation of fixings for panel to panel oThe fixing shall be the tested 13g x 25mm self-drilling steel screws, or larger/longer in size. oThe fixing shall be at least 200mm centres or closer.Variation of fixings for panel to frame, barge edges, top the valley gutter steel skin to top of panel, ridge cap. oThe fixing shall be the tested TEK 14g x 175mm Hex screws with cyclone clips, or larger/longer in size. oThe fixing shall be at least 200mm centres or closer.Variation of fixings for bottom of valley gutter steel skin to bottom of panel. oThe fixing shall be the tested stainless-steel rivet, or larger/longer in size. oThe fixing shall be at least 200mm centres or closer.The mineral wool under the valley gutter may be as tested 50mm or thicker, with a minimum density of 38kg/m2 as per Figure 6. Roof framing system may vary as follows;oThe framing may be arranged and specified to meet AS 1684 timber framing code or NASH standardsteel framed construction in a bushfire area. oFraming details at eaves shall exclude gaps greater than 3mm.The inclusion of the following sealants in all gaps including roof ribbing edges, joints on the upper and underside of the roof, valley gutter, barges, ridge, hips, and drip edges. oBoss FireSilicone-EMA sealant (as tested) or other fire-resistant silicone sealants such asSikasil 670 Fire Silicone Sealant.Roof pitch variation The proposed construction includes a roof that has a pitch that varies as follows: The pitch of the roof may vary from 45 degrees tested to a roof with a pitch of 8 to 75 degrees. WithreferencetoFSZ2411,theroofpitchwastestedat45degrees.Sustainedflamingorgap formation was not observed during the test.With reference to AS 1530.8.1-2018 clause 17.2, it requires roof systems with a steep pitch to be evaluated separately from roof systems with a shallow pitch. With reference to AS 1530.8.1-2018 clause 17.6, it stipulates that if the roof with a pitch of 45 degrees has been tested, the result shall apply to roofs with a gradient of more than 18 degrees and less than 75 degrees. The tested roof system in FSZ 2411 and the above discussion confirms that the proposed system meets this requirement. With reference to AS 1530.8.1-2018 clause 17.6, it also stipulates that the roof with a pitch of 18 degrees that has been tested, the result shall apply to roofs with a gradient up to 18 degrees. TheFCO-3545 Page 12 of 16 Copyright CSIRO 2024 This report may only be reproduced in full. Alteration of this report without written authorisation from CSIRO is forbidden.'