System and method for reinforced concrete construction
AssigneesEnnis H. Proctor, Donald C. Proctor, Donald C. Page
InventorJohn A. Wilnau
Life of this patent
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Abstract
A system for constructing the structural framework of a building or other structure of reinforced concrete is characterized by column and beam forms of sheet metal which remain in place as permanent parts of the framework after being filled with concrete. These forms are preferably factory-assembled, together with the necessary internal metal reinforcing skeletons, and shipped to the building site ready for erection of the column forms and interconnection thereof by the beam forms. Novel provisions are made, by means of walers and tensioned steel bands, for initially compressing opposed side walls of the forms to concave curvatures so that they are returned to essential flatness by the hydrostatic pressure of the fluid concrete.
Claims6
A system for building a structural framework on a foundation, comprising
- (a) a plurality of elongated metal shells of rectangular cross section,
- (b) means for securing certain of said shells to the foundation in horizontally spaced vertical positions defining the columns of the framework,
- (c) others of said shells being supported on said column shells in horizontally extending relation defining the beams of the framework,
- (d) means permanently securing adjacent ends of said beam shells together and to the adjacent said column shells with the interiors of adjacent said shells in interconnecting relation,
- (e) a plurality of reinforcing bars extending the full length of the interior of each of said shells,
- (f) means holding said reinforcing bars within each said shell in predetermined spaced relation with each other and with the inner surface of said shell,
- (g) reinforcing bars extending in bridging relation across each joint between adjacent said shells and in connected relation with said reinforcing bars within said adjacent shells,
- (h) said beam shells being open along the upper sides thereof to receive fluid concrete in sufficient quantity to fill the interiors thereof and of said column shells below said beam shells and to cooperate with said reinforcing bars in retaining said shells in rigidly interconnected relation defining the structural framework,
- (i) means compressing the opposed side walls of each of said beam shells to predetermined concave curvatures, and
- (j) said compressing means having:
- (aa) predetermined limited yield characteristics providing for substantial flattening of said side walls in response to the hydrostatic pressure of fluid concrete substantially filling said beam shells;
- (bb) waler means engaging each of said opposed side walls of said column shells,
- (cc) a plurality of band means of limited yieldability spaced vertically in encircling relation with said column shells and said waler means, and
- (dd) means holding said band means in predetermined tension calculated to balance the hydrostatic pressure developed by fluid concrete substantially filling said column shells with said opposed side walls substantially flat.
The method of constructing a structural framework comprising
- (a) mounting a plurality of elongated metal shells of rectangular cross section in horizontally spaced vertical positions defining the columns of the framework,
- (b) said column shells being substantially totally closed along all four sides thereof,
- (c) securing a plurality of other elongated rectangular metal shells on said column shells in horizontally extending relation defining the beams of the framework with the interiors of adjacent said beam and column shells in interconnecting relation,
- (d) said beam shells being open along the upper sides thereof to receive fluid concrete,
- (e) mounting a plurality of reinforcing bars within each of said shells to extend the full length of each said shell in predetermined spaced relation with each other and with the inner surface of said shell,
- (f) connecting reinforcing bars in bridging relation across each joint between adjacent said shells,
- (g) compressing the opposed side walls of each of said beam shells to predetermined concave curvatures by predetermined yieldable force calculated to balance the hydrostatic pressure developed by fluid concrete substantially filling said bean shells with said side walls substantially flat,
- (h) filling said interconnected shells with fluid concrete until said compressed shell side walls are substantially flat, and
- (i) compressing opposed side walls of each of said column shells to predetermined concave curvatures by predetermined yieldable force calculated to balance the hydrostatic pressure developed by fluid concrete filling all of said shells substantially to the tops of said beam shells with said beam shell side walls substantially flat.
Dependencies are inferred from the claim text.