The reinforced bars in China are characterized by a great variety,lower Strength,bad ductility of some reinforced bars.Therefore,the reinforced bars made in China are difficult to suit the needs of development of concrete structure.Based on the requirement of the concrete structure in the properties of the stressed reinforced bar,the existing reinforced bars are analyzed and compared in respect of strength,ductility,quality stability,anchorage property,constructure adaptibility and economics etc.On the basis of a national conditions and changes of constructure market,a series of proposals were put forward,such as spreading Ⅲ-grade reinforced bar,middle-high strength steel wire and stranded wire,development of Ⅱ,Ⅲ-grade small diameter reinforced bars,optimization or elimination of cold working reinforced bar and development of the technology concerning reinforced bar etc..
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