ADJUSTABLE MANHOLE FRAME AND METHOD OF CONSTRUCTION AND INSTALLATION

摘要

ADJUSTABLE MANHOLE FRAME AND METHOD OF CONSTRUCTION AND INSTALLATION An adjustable cast iron or ductile iron manhole frame and method of construction utilizing a formed concrete base or a base of brick and cement mortar that supports both the frame and the pavement. The height and angle of the frame are determined by the method of construction which sets the height and angle of the formed concrete base. The frame is further adapted to receive and hold the manhole cover, and the frame includes an arched section to hold it securely to the concrete base or to filler material when in a raised position.