Patent ID: 9476218
Filing Date: 2016-10-25
CPC Classification: E02D,E04B,E04C,E04H

Claim Text:
1. A column base fitting comprising: a bottom plate formed to be a plate shape having a square shape, both surfaces of upper and lower, and thickness, and; a support base being inside from a periphery part of the upper surface of the bottom plate and having a height upward, wherein an upper surface of the support base is configured to be jointed on a lower end of a column member, wherein three bolt insertion holes are formed in each four corner portions of the bottom plate, wherein each center position of the three bolt insertion holes is located at a position, in which a gravity center of a triangle consisting of lines connecting each center of the bolt insertion holes comes to a position corresponding to a corner part of the support base, and wherein each of said three bolt insertion holes is formed to have approximately the same diameter, wherein the three bolt insertion holes are a first bolt insertion hole formed in each four corner portions of the bottom plate and second bolt insertion holes formed at positions closer to a center part than the first bolt insertion hole in each two adjacent sides to the corner portion, and wherein a step recess portion lower than a height of the bottom plate is formed on a lower surface side of the bottom plate and outside in the horizontal direction from the second bolt insertion hole.