A centering device between two adjacent tubular members, such as pre-cast concrete structures used in a manhole assembly, may comprise a guide member having a sidewall and a crosspiece member. The guide member may be installed on an end of a first tubular member. The second tubular member may be stacked on top of the first tubular member. The guide member may center the first and second tubular members and may prevent horizontal displacement of the first tubular member with respect to the second tubular member.