The Service Of Creating A Report On The State Of The Roof Structure And Roof Statics On Public Buildings In Kragujevac: Elementary School "Mirko Jovanović", Elementary School "Moma Stanojlović", Elementary School "Svetozar Marković", Elementary School "Vuk Stefanović Karadžić" And Elementary School "19.Oktobar" And Assessment Of The Required Strength Of Roof Fn Systems For The Needs Of Public Buildings: Elementary School "Mirko Jovanović" And Elementary School "Moma Stanojlović."