Static structures (e.g. – buildings) – With component having discrete prestressing means – Axially loaded vertical structure
Reexamination Certificate
2005-02-08
2005-02-08
Friedman, Carl D. (Department: 3635)
Static structures (e.g., buildings)
With component having discrete prestressing means
Axially loaded vertical structure
C052S223140, C052S749100, C052S223500
Reexamination Certificate
active
06851231
ABSTRACT:
A precast post-tensioned segmental pole system capable of supporting a load is provided. The pole system includes a plurality of pole segments that use connectors and strands to anchor them together. The strands extend within a cavity formed in the pole segments and are external to the wall structure of the pole segments. The strands may be coupled between both of the pole segments, or be anchored to a connector. The connector includes an upper piece that is coupled to one pole segment, and a lower piece that is coupled to the other pole segment. Upper and lower pieces interlock with each other to join the pole segments to one another. The strands are placed in tension so that pole system is capable of withstanding forces imposed by the load.
REFERENCES:
Erickson Air-Crane, published in 2001.
Spun Concrete Distribution Poles—An Alternative by Fouad H. Fouad, Ph.D. et al., published in Transmission & Distribution, dated Apr. 1992, pp. 52-58.
HYPERCON Partnership for High-Performance Concrete Technology, Building and Fire Research Laboratory Program, dated Aug. 15, 2001, pp. 1-10.
Prestressed Concrete Poles: State-of-the-Art by Thomas E. Rodgers, Jr., published in PCI Journal, dated Sep.-Oct., 1984, pp. 52-103.
Behavior and Design of Static Cast Prestressed Concrete Distribution Poles by Barry T. Rosson, Ph.D., P.E. et al, published in PCI Journal, dated Sep.-Oct., 1996, pp. 94-107.
Guide for the Design and Use of Concrete Poles, by the Concrete Pole Task Committee, Tadros Associates, LLC, undated, pp. 1-49.
Performance of Spun Prestressed Concrete Poles During Hurricane Andrew by Fouad H. Fouad, Ph.D., P.E. et al., published in PCI Journal, dated Mar.-Apr., 1994, pp. 102-110.
Improving the Durability and Performance of Spun-Cast Concrete Poles by Walter H. Dilger, Ph.D., P. Eng., published in PCI Journal, dated Mar.-Apr., 1996, pp. 68-89.
Foster E. Terence
Hansen Audra L.
Tadros Maher K.
Yehia Sherif A.
Friedman Carl D.
Katcheves Basil
Shook Hardy & Bacon L.L.P.
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