b'Association of Hydraulic Services Consultants AustraliaResearch Foundation 4.Certification I hereby certify that the roof drainage capacity calculation results presented in this report was carried out in accordance with AS1562.1:2018 and AHSCA Research Foundation protocols. A/Professor Terry Lucke - Research CorodinatorMark Alexander, PhD, FIEAust CPEng EngExec NER APEC Engineer IntPE(Aus)AHSCA Foundation Cha irman:Date: 20 thAugust 2020Date: 20 thAugust 2020 *Disclaimer:Calculations were performed using dimensions obtained from AutoCAD drawings provided to the AHSCA by Delta Panels Pty Ltd for this purpose. No measurements of actual roof sheeting products were performed for this report. The maximum allowable roof sheeting lengths provided in this report are based on calculations oftheoreticalhydraulicdrainagecapacityonly.Thedesignerandinstallermustprovide allowances for thermal expansion according to AS1562.1:2018 and other relevant design codes. These may significantly reduce the allowable roof sheeting lengths provided in this report. The AHSCAdoesnotguaranteetheaccuracyorvalidityof thecalculation proceduresgivenin AS1562.1: 2018.Page 8 of 10'