Foundation for sign posts and lamp posts - consists of cylindrical cage of steel bars buried vertically in the ground

摘要

Foundation for sign supporting posts, which is lighter and more economical than usual concrete bases, consists of an elongated cylindrical cage with several longitudinal bars 1 welded 4 to regularly spaced rings 2 to form a rigid frame. The unit is buried vertically in the ground leaving vertical bars protruding being threaded and housing internally threaded sleeves to accommodate post base plate holding down bolts etc. Lateral forces are resisted by passive wedges of soil emanating from each vertical member.