b'Association of Hydraulic Services Consultants AustraliaResearch Foundation 4. CertificationI 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 tothe AHSCA by Delta Panels Pty Ltd for this purpose. No measurements of actual roof sheetingproducts were performed for this report. The maximum allowable roof sheeting lengths provided in this report are based on calculationsoftheoreticalhydraulicdrainagecapacityonly.Thedesignerandinstallermustprovideallowances 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. TheAHSCAdoesnotguaranteetheaccuracyorvalidityof thecalculation proceduresgiveninAS1562.1: 2018.Page 8 of 10'