Column leg hardware and column leg structure using same

Column leg hardware (42) has: a bottom plate (42c) which is formed in a substantially plate-like shape and which has a thickness and rectangular front and back surfaces and a support base (42f) which has an upward height and which is located on the inside of the peripheral edge of the upper surface (42d) of the bottom plate (42c), and the column leg hardware (42) is configured in such a manner that the lower end of a column member (4) is joined to the upper surface (42g) of the support base (42f). First bolt insertion holes (42a) are respectively formed at the four corners of the rectangular shape of the bottom plate (42c). Second bolt insertion holes (42b) are formed at two positions of each of the four sides of the rectangular shape of the bottom plate (42c), the two positions being located closer to the longitudinal center of the side than the first bolt insertion holes (42a). Corner buildups (42r) are formed at both longitudinal ends of each of the side surfaces (42h) of the support base (42f) so as to fi