Static structures (e.g. – buildings) – Three-way corner construction – Barrier resting on top of vertical structures; e.g. – walls
Patent
1988-10-24
1989-10-31
Murtagh, John E.
Static structures (e.g., buildings)
Three-way corner construction
Barrier resting on top of vertical structures; e.g., walls
52299, 52721, 2482184, E04B 136
Patent
active
048768367
DESCRIPTION:
BRIEF SUMMARY
First of all, it must be borne in mind that in the public works and construction industry the possibility of using long-span beams constitutes an indispensable advantage, in particular in that it enables wide-mesh lattice floors to be constructed.
The present invention is generally concerned with the construction of long spans such as those found in large commercial premises and in industrial buildings, through the combination of, on the one hand, long-span beams, preferably of adhesively bonded laminate material or composite material, to the exclusion of metal materials and concrete, constituting the parallel sides of a lattice with conventional crossmembers and, on the other hand, supporting structural steelwork.
To be more specific, the present invention concerns an improved system for supporting and attaching long-span laminated or composite material beams on and to metal support posts, the system being designed to transfer the vertical reaction force to the weight of the beam into a buttress force in the corresponding post and so to create a horizontal longitudinal stress force in the beam which increases the permissible span for said beam.
The improved system in accordance with the invention is characterized in that each post is provided with at least one buttress leg member articulated at its lower end to an articulation shaft attached to the corresponding post and the upper end of which is provided with a two-wing channel on which bears a corner strengthening member attached to the end of a long-span beam through contact members on said corner strengthening member, whereby the vertical reaction force to the weight of the beam is converted to a buttress force on the axis of the corresponding buttress leg member which produces a horizontal longitudinal compression force in the corresponding long-span beam.
According to other characteristics of the invention: symmetrically disposed and articulated relative to the longitudinal axis of symmetry of the post and each adapted to receive a respective end of a long-span beam, whereby the two buttress forces in the two buttress leg members balance each other; receive the end of the end long-span beam of the structure, the second buttress leg member being replaced by a bracing member balancing the buttress force applied to the post by the buttress leg member.
Other characteristics and advantages of the present invention will emerge from the following description of it given by way of preferred example only and with reference to the appended diagrammatic drawings showing one possible embodiment of said invention.
In the drawings
FIG. 1 is a diagram showing in a particularly simple way the basic principle of the invention;
FIG. 2 is a detail view to a much larger scale showing in elevation the upper part of an intermediate post with two buttress leg members receiving the ends of two long-span beams;
FIG. 3 is a plan view of the aforementioned assembly;
FIG. 4 is a detail view to a larger scale showing in elevation the device for attachment and pivoting of the base of one of the buttress arm members to an intermediate post like that of FIGS. 2 and 3;
FIG. 5 is a detail view of the attachment and pivoting device from FIG. 4 shown in plan, partially cut away and in horizontal cross-section on the line V--V in said FIG. 4;
FIG. 6 is a view of the buttress arm member proper in transverse cross-section on the line VI--VI in FIG. 4;
FIG. 7 is a view in elevation of the upper end of the buttress arm member from FIGS. 4, 5 and 6, showing how it is adapted to receive the end of a long-span beam;
FIG. 8 is a plan view of the end of said arm member as shown in FIG. 7; and
FIG. 9 is a detail view in elevation showing how each of the end posts is adapted to compensate the lateral force exerted by long-span beam on the post in question.
Referring first of all to the diagram in FIG. 1 showing the principle of the invention, it will be remembered that the invention is generally concerned with constructing long span through combining: bonded laminate or composite material, to the
REFERENCES:
patent: 816158 (1906-03-01), Erickson
patent: 967471 (1910-08-01), Wanamaker
patent: 4260293 (1981-04-01), Peterson
Bourrier Pierre
Irigoyen Marc E.
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