Static structures (e.g. – buildings) – Module or panel having discrete edgewise or face-to-face... – Having integral key
Reexamination Certificate
1995-11-03
2001-07-03
Friedman, Carl D. (Department: 3635)
Static structures (e.g., buildings)
Module or panel having discrete edgewise or face-to-face...
Having integral key
C052S590200, C052S591200, C052S637000, C052S646000, C052S648100, C052S653100
Reexamination Certificate
active
06253520
ABSTRACT:
This invention relates to interlocking, quick assembly, load bearing, six-way, structural steel trusses fabricated from stamped, structural grade sheet metals and structural shapes for use in construction systems; and companion application Ser. No. 08/430,806, filed Apr. 26, 1995, now U.S. Pat. No. 5,746,038 which is hereby made a part of this disclosure.
Materials used for the various components of this invention will be selected from available commercial products. Selection of specific materials will be flexible to adjust for market conditions and availability of new products.
Members of this patent are structurally specialized to react to specific positive and negative forces. They are interchangeable with members described in “CONSTRUCTION COMPONENTS and ASSEMBLY SYSTEM”. Other members may be factory welded to structural beams and columns to facilitate field assembly.
This specification provides several innovative advancements to the arts related physical characteristics inherent to structural steel, protection from shear, damage from high winds and large forces, manufacture of products having undercuts on six or more polyhedron faces, assembly, and the best use of very high strength metals. It does increase, but not greatly extend or increase the ratio of truss depth to span and protection from four-hour, unsprinkled fire exposures. These advancements are:
Quick couple and assembly connections are not used in structural members except in panels and sections acting as a composite beam between two supports. Connectors are not capable of resisting bending and shear forces parallel to both primary axes of the panels. Manufactured buildings fail due to connector failures rather than failures in the metal skin or in structural support members. Specifications herein describe a four-way steel structural truss assemblage where outside forces are distributed into truss members in six directions via connectors. Connectors are protected from excessive bending, deformation, and shear. Plates penetrate intermediate walls to provide the means for direct force transference between members in six directions and to provide connectors of greater strength than primary members.
Long span structures are currently made from rigid, heavy members capable of withstanding compressive forces even though outside forces will normally result in tensile forces in those members. Structural engineers have paradigms and fears of compressive forces in thin plate or bar members in long span structures because connection of the bottom members with supporting members may induce compressive forces in members that would result in failure. This specification provides a protective device to prevent such compression, which will make the best use of high tensile strength structural steels.
Structural trusses, made of beams, bars, and angles, do not provide a ventilating system to dispel heat from fire. Steel structural systems carry higher insurance rates and may be a hazard to firemen due to failures during fires. This specification reduces the hazard by providing for convection currents to discharge the heat to the outside.
SUMMARY OF THE INVENTION
A structure is made from cold rolled shapes and/or shaped from structural grade sheet metals or structural shapes for use in structural, load bearing construction. The structure is comprised of interlocking box trusses containing core members held by web members and pairs of parallel spaced chord members as well as facing units. Each web member and each chord member has at least one major axis, upper and lower transverse edge faces, side transverse edge faces, opposing primary faces, and edges; and each web member and each chord member has a plurality of alternating, tapering, and projecting teeth and transverse strikes on transverse edge faces and at least one of the opposing primary faces. Each projecting tooth has a shape of a truncated pyramid with a taper on three sides of an inverted trapezoid base and with orthographic projection of a greater side, and has facets joined with at least one primary face at obtuse angles, a distance between the facets at the juncture with the primary face being less than at other respective facets Chord members are aligned and interconnected with respective chord members of adjacent box trusses. Web members interlock with pairs of interconnected parallel spaced chord members at upper and lower transverse edge faces and with pairs of other interconnected web members of adjacent aligned box trusses at side transverse edge faces. The before mentioned facing units are deformed by wedges between the facing units and anti-compression rigid frame core members. Members are locked together when teeth of web members interlock with teeth of two adjacent aligned chord members and with teeth of two other adjacent aligned web members, thereby forming joins of groups of three and forming hollow polyhedron shaped and aligned box trusses. And where each of the box trusses are comprised of four web members and two parallel spaced chord members, and the web members are perpendicular to each other.
REFERENCES:
patent: 2691242 (1954-09-01), Young et al.
patent: 2882714 (1959-04-01), Gagle et al.
patent: 3264021 (1966-08-01), Artman
patent: 3591212 (1971-07-01), Rhyne
patent: 3670449 (1972-06-01), Lemign et al.
patent: 3924376 (1975-12-01), Tsurumi
patent: 3992834 (1976-11-01), Valenzano
Sweets Industrial File, structural Metals, 1996 by Dodge Corp. USA.
Sweets Architectural File, structural Metals, 1996 by Dodge Corp. USA. (2 way & 4 way trusses, short span and long span) (Also space frames -see letter).
Friedman Carl D.
Horton Yvonne M.
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