Taking an ultimate deflection more than 1 / 50 of calculating span as the determinant term , by the means of numerical analysis and regress equation respectively , this paper discusses the reasonable stretching controlling stress of usual span and reinforcement slabs for design reference 以極限撓度達到跨度的1 50作為延性破壞的判定指標,本文分別運用數(shù)值分析程序試算和回歸方程得出了常用跨度、常用配筋的中強( 1270mpa )螺旋肋鋼絲預(yù)應(yīng)力混凝土空心板的張拉控制應(yīng)力的取值,供設(shè)計參考。