Patent ID: 7431383

Claim:
A construction machine comprising: a lower traveling body; an upper rotating body rotatably disposed on the lower traveling body, the upper rotating body including an upper frame with a bottom plate having a machined attachment hole, an inner periphery of which is machined so as to be substantially perpendicular to the bottom plate and extends substantially perpendicular to the bottom plate; and a perpendicular member comprising a supporter for supporting an element at a certain distance above the bottom plate, wherein said supporter is disposed on the bottom plate in such a manner that a lower end of the supporter is welded substantially perpendicular to the bottom plate while being engaged with said bottom plate at said machined attachment hole, wherein said attachment hole extends completely through the bottom plate, a lower end of the supporter being welded to the bottom plate while being completely inserted through and engaged with said attachment hole, whereby the height of the perpendicular member can be adjusted.