Hydraulic and earth engineering – Foundation – Columnar structure
Patent
1993-09-28
1996-08-06
Friedman, Carl D.
Hydraulic and earth engineering
Foundation
Columnar structure
521696, 526494, 52677, 249 83, 405256, E02D 530
Patent
active
055427855
ABSTRACT:
A spacer (20) is mounted on a lateral rebar tie (13) of a reinforcement cage (11) of a poured concrete foundation support. The spacer (20) includes a pair of interlocking wheel members (21 and 22) which lock the wheel members (21 and 22) together in a mated interlocked relationship rotatably mounted about a lateral tie (13) of the reinforcement cage (11) to form the spacer (20). As the reinforcement cage (11) is inserted into an excavated shaft, the outer side wall (32) of the spacer (20) engages and rolls along the side wall thereof. The engagement of the side wall of the excavated shaft by the spacers (20) centers the reinforcement cage within the excavated shaft and maintains the reinforcement cage in its centered position as the excavated shaft is filled with concrete.
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"Centraligner Pier Sleds" by Pieresearch, 2 pages, 1990.
Friedman Carl D.
Lowtech Corporation, Inc.
Wilkens Kevin D.
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