The thickness of the parapet wall, on the valley side of the roadway, is usually kept as
A. 20 cm
B. 40 cm
C. 60 cm
D. 80 cm
Answer:C
The thickness of the parapet wall, on the valley side of the roadway, is usually kept as
A. 20 cm B. 40 cm C. 60 cm D. 80 cm