底筋长度=净长+2*max（支座宽/2，5d）+2*6.25d（一级钢筋）+搭接根数=（净长-2*50）/间距+1面筋长度=净长+2*la+2*6.25d（一级钢筋）+搭接根数=（净长-2*50）/间距+1la:...[查看详情]
申请装修立省30%
