BICSI recommends that any trench ________ or more deep must be shored to prevent cave in.

BICSI recommends that any trench ________ or more deep must be shored to prevent cave in.
A . 1.2 m (4 ft)
B . 1.5 m (5 ft)
C . 1.7 m (5.5 ft)
D . 1.83 m (6 ft)
E . 2.1 m (7 ft)

View Answer

Answer: B