Static structures (e.g. – buildings) – Openwork; e.g. – truss – trellis – grille – screen – frame – or... – Three-dimensional space-defining
Patent
1985-09-23
1986-12-09
Ridgill, Jr., James L.
Static structures (e.g., buildings)
Openwork; e.g., truss, trellis, grille, screen, frame, or...
Three-dimensional space-defining
52742, 405239, E04H 1212, E02D 522
Patent
active
046272119
ABSTRACT:
A combination support/spacer adapted for attachment to the periphery of a reinforcing cage--prior to the time that the cage is lowered into a pier hole. The support/spacer is configured in such a way as to be aptly referred to as a sled. The sled has a runner which is adapted to be in contact with the earth surrounding a pier hole, and said runner has a substantial flat face so that it provides wide-area contact with the earth. The runner has two ends, both of which are inclined upwardly with respect to the plane of the runner face. Both ends are turned up by the same amount, so that the sled may be mounted on a reinforcing cage without regard to a particular orientation, and so that the sled will perform equally well if the cage is being lowered or raised in the pier hole.
A longitudinal web extends from one end of the runner to the other end; the web serves to support the runner in its concave configuration, as well as to provide a base for two spaced tabs that are designed to make contact with a longitudinal member of the reinforcing cage. A pair of wings are preferably provided at approximately the mid point of the sled, and the wings extend high enough on the sled to make contact with an adjacent spiral loop when the tabs are in contact with a longitudinal rod. Small holes are provided in both the tabs and the wings so that tie wires may be passed through the holes in order to secure a sled at a desired position on a reinforcing cage. A plurality of such sleds positioned around and along a reinforcing cage will ensure that the cage is held away from the sides of a pier hole by a distance equal to the height of the sleds, both during insertion of the cage and during the pouring of concrete therearound. The sled is preferably made of a material like polypropylene, so that it may be safely imbedded in the resultant concrete pier without any risk of deterioration due to rust or corrosion.
REFERENCES:
patent: 790230 (1905-05-01), Stempel
patent: 1043782 (1912-11-01), Lindau
patent: 1708277 (1929-04-01), Martin
patent: 2612024 (1952-09-01), Hunsucker
patent: 3257767 (1966-06-01), Lassy
patent: 3471986 (1969-10-01), Swenson
patent: 3722164 (1973-03-01), Schmidgall
McHugh Charles W.
Ridgill, Jr. James L.
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