Researching the cross section in order to increase the resistance of carrier element and putting the concrete tension strength in calculation

ABSTRACTIn this thesis, most economically convenient selection of cross section by comparingvarious rectangular cross section?s strength moments are researced. How much saving isgenerated relating to square, thin projecting rectangle cross section and changing innerand outer diameter proportions by cross section decrease and twist from the edges of thecircle are researced. How much saving is generated by using the material which willprovide uniform strength, importance of steel fence and it?s advantages. Thespecifications of plastic construction materials, the advantages of using fiber reinforcedpolymer beam and perlite.Moreover, the results of using both concrete curtain and column-beam system arecompared in a 40 storey concrete building.As a result, putting the concrete tension strength in calculations will cause importantdecrease steel among in tall buildings.Key Words: Resistance moment, the tensile strength of concrete.