Abstract: Shower pans are provided with a perimeter wall defining a perimeter of the shower pan and a plurality of generally triangular support wall sections. One wall of the support wall sections is opposed to the perimeter wall and defines therebetween a perimeter channel of the shower pan. Other pairs of walls of the support wall sections are opposed to one another and define drain channels which fluid-connect the perimeter channel to the drain port. The other walls of the support wall sections have upper edges which establish an apex of the shower pan near the central drain port and slope downwardly and outwardly from the apex to the perimeter channel. The drain channels are sloped downwardly and inwardly from the perimeter channel to the central drain port.