多项选择题
有关对城市桥梁工程模板支架搭设及拆除的安全措施的说法中，正确的是( )。
- A.脚手架与模板支架相连接时应采用连接件
B.施工中不得超载，不得在支架上集中堆放物料
C.严禁在脚手架上拴缆风绳、架设混凝土泵等设备
D.支架模板、脚手架拆除采用机械作业时应由专人指挥
E.支架模板、脚手架拆除必须由上而下逐层进行，严禁上下同时作业
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