(A-4) Simple gap between concrete units with no movement of the wall (E-1)One concrete unit extracted- (E-2)More than one concrete unit extracted- (F-1)One concrete unit out of layer- (F-2)More than one concrete unit out of layer- (G-1)Concrete units need to be rearranged- ArrangementG-1 Gap A-3 Gap A-4 More than one cracked concrete unit One concrete unit out of layer- cracked D-3 disintegrated D-6

Gap concrete-surface-cracks