A.406kN B.306kN C.206kN D.106kN
A.3.5~4.5MN/m B.5.5~6.5MN/m C.6.5~7.5MN/m D.7.5~8.5MN/m
A.7.5~8.5MN/m B.8.5~9.5MN/m C.9.5~10.5MN/m D.11~11.5MN/m