某厂房设计降雨强度q=478L/(s·h㎡),屋面径流系数w=0.9,拟用屋面结构形成的矩形凹槽做排水天沟,其宽B=0.6m,高H=0.3m,设计水深h取0.15m,天沟水流速度V=0.6m/s,则天沟的最大允许汇水面积应为以下何项?()
A.125.52㎡ B.251.05㎡ C.1255.23㎡ D.2510.46㎡正确答案C
某厂房设计降雨强度q=478L/(s·h㎡),屋面径流系数w=0.9,拟用屋面结构形成的矩形凹槽做排水天沟,其宽B=0.6m,高H=0.3m,设计水深h取0.15m,天沟水流速度V=0.6m/s,则天沟的最大允许汇水面积应为以下何项?()
A.125.52㎡ B.251.05㎡ C.1255.23㎡ D.2510.46㎡正确答案C