单项选择题
如图所示铰接悬臂行车道板、承受公路-Ⅱ级荷载
A.a1=44cm,b1=84cm B.a1=84cm,b1=44cm C.a1=44cm,b1=44cm D.a1=84cm,b1=84cm
A.2448 B.3604 C.1994 D.2794
A.149.56kPa B.157.96kPa C.172.34kPa D.184.1kPa