Static structures (e.g. – buildings) – With component having discrete prestressing means – Beam – girder – or truss construction
Patent
1977-03-02
1978-04-25
Perham, Alfred C.
Static structures (e.g., buildings)
With component having discrete prestressing means
Beam, girder, or truss construction
52 39, 52494, 52506, 52707, 52710, E04B 138, E04C 310
Patent
active
040855562
ABSTRACT:
The device comprises, for anchoring each T-shaped fixing bolt in a concrete element, a passageway opening onto an outer face of the element and extended by a cavity which allows rotation of the head of the bolt through 90.degree.. A longitudinal reinforcement which is parallel to the outer face is located at a short distance from the outer face and near to the inner end of the passageways. The reinforcement has in the region of each passageway an opening for the passage of the head of the fixing bolt when this head extends in a direction parallel to the longitudinal axis of the reinforcement. Two retaining surfaces adjoining the opening retain the head of the bolt when it is perpendicular to the longitudinal axis of the reinforcement. Arch-shaped members are fixed to the surface of the reinforcement which is adjacent the outer face of the concrete element and have inclined branches which extend into the concrete in a direction opposed to the outer face to a sufficient depth to distribute the forces within the concrete element.
REFERENCES:
patent: 815364 (1906-03-01), Mihills
patent: 827613 (1906-07-01), Brown
patent: 868065 (1907-10-01), Barnes
patent: 874462 (1907-12-01), Walker
patent: 1114013 (1914-10-01), Millar
patent: 1155243 (1915-09-01), Jordahl
patent: 1339226 (1920-05-01), Schuster
patent: 2121213 (1938-06-01), Small
patent: 3114220 (1963-12-01), Maddox et al.
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