In reinforced concrete floors, the movement joints should normally be spaced at a maximum spacing of ____________

In reinforced concrete floors, the movement joints should normally be

1.	In reinforced concrete floors, the movement joints should normally be spaced at a maximum spacing of ____________
A.	6 m
B.	4.5 m
C.	7.5 m
D.	9 m
Answer» D. 9 m