A carriage guiding post in a transfer lifter, is a four-sided support post of an approximately square shape in cross section the support post having carriage guiding rail recesses provided in three of the four sides thereof, and a counter weight guiding rail track provided on the remaining side of the support post, the carriage guiding rail recesses and the counter weight guiding rail all extend continuously throughout the length of the support post, wherein the counter weight guiding rail track is a rib projecting from a central region of the side of the support post and extends lengthwise thereof, the rib having an approximately isosceles triangle shaped cross section.