Opal Tower: Concrete panel 'not cause of' crackStructural engineers investigating cracks in Sydney's Opal Tower reportedly think a prefabricated concrete panel was not inherently faulty.برج مسکونی اوپال در سیدنی Source: AAP Image/Mick TsikasPublished 31 December 2018 10:32amBy Peyman JamaliAvailable in other languagesSkip to article contentShare this with family and friendsCopy linkShareShare