Precast concrete manhole adjustable bolt slot for securing...

E - Fixed Constructions – 02 – D

Patent

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Details

94/12, 61/2.4

E02D 29/14 (2006.01) B28B 5/00 (2006.01) B28B 7/00 (2006.01)

Patent

CA 1270139

ABSTRACT OF THE DISCLOSURE An insert is provided herein for use as an adjustable fastener slot in manhole top sections and the like for mounting and securing a cover frame thereto. The insert includes an elongated plastic member having a hollow interior of a sub- stantially-T-shaped-cross-section defining a wide base portion and a narrow upper portion. The exterior periphery of the insert generally conforms to that cross-sectional configuration. The top surface of the insert is formed of an integral web of a thickness which is substantially less than the thickness of the remaining portion of the web body to facilitate the cutting away and removal of the web for insertion of a threaded member. The enlarged base portion of the insert slideably receives a first member. The narrower upper portion of the insert communicates with the base portion and extends to the web for receiving a second member which may be secured to the first member and which has a threaded upper portion. The base portion of the insert has an elongated hollow region of substantially uniform cross-section to permit the first member to be slideably positioned along the length thereof.

516475

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