A.15~20mm B.15~25mm C.20~30mm D.20~25mm
A.6m,12m B.5m,12m C.6m,18m D.5m,18m
A.沉降縫、伸縮縫和防震縫 B.施工縫、伸縮縫和防震縫 C.變形縫、伸縮縫和防震縫