Abstract: A kit for forming a hopper bottom of a particulate material storage container comprises a generally conical lower section having a tapering diameter from a first end to the second end such that the second end is sized diametrically smaller, and a plurality of arcuate cone segments each defining an inclined concavely curved wall following a generally circular curvature, all of which can collectively form a hopper cone. The arcuate cone segments are connected in an annulus in which the walls of the arcuate cone segments collectively form a generally conical second cone section having a tapering diameter from one end to an opposite end which has a diameter substantially equal to that of the second end of the first cone section. Afterwards, the opposite end of the formed second cone section is connected to the first end of the first cone section so as to form the hopper cone.