Static structures (e.g. – buildings) – With component having discrete prestressing means – Anchorage
Patent
1997-11-21
1998-10-06
Canfield, Robert
Static structures (e.g., buildings)
With component having discrete prestressing means
Anchorage
5222314, 52 922, 52 931, 52 1, 521671, 522933, 52713, 5274521, 527413, E02D 2750, H04H 914
Patent
active
058159991
ABSTRACT:
A method and apparatus for strengthening a frame building with extension rebars clamped to the foundation rebar and extending between the studs and through the double plate between the rafters, includes a clamp that automatically corrects for building shrinkage. The clamp includes a steel shear plate on top of the double that has a central hole for passage of the extension rebar and a pair of steel plates clamped to the extension rebar. The bottom edges of the steel plates are angled from the surface of the surface of the shear plate and a spring biased wedge in the gap maintains tension of the extension rebar. Rafters may also be secured to the extension rebar by hooking a metal strap steel over a horizontal rebar on the rafters.
REFERENCES:
patent: 5384993 (1995-01-01), Phillips
patent: 5448861 (1995-09-01), Lawson
patent: 5535561 (1996-07-01), Schuyler
patent: 5570549 (1996-11-01), Lung et al.
patent: 5664389 (1997-09-01), Williams
Canfield Robert
Castle Linval B.
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