In a reinforced concrete retaining wall, a shear key is provided if th

1.	In a reinforced concrete retaining wall, a shear key is provided if the
A.	Shear stress in the vertical stem is excessive
B.	Shear force in the toe slab is more than that in the heel slab
C.	Retaining wall is not safe against sliding
D.	Retaining wall is not safe against overturning
Answer» D. Retaining wall is not safe against overturning

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