Patent Application
20070068091
Conventional building practice for residential and commercial buildings relies primarily on frame construction in which the frame is constructed on site from pieces which are individually cut to fit. It is a labor-intensive process and demands considerable skill from skilled workers.
Prefabricated building systems have become popular for many reasons, including (nonexclusively) ease and speed of assembly, beneficial strength characteristics, material selection, longevity of the finished structure, and cost. These prefabricated systems provide clear benefits over the conventional construction method of creating components and assembling a structure piece-by-piece at a construction site, as this conventional method requires a skilled crew and expensive equipment. Both of these requirements significantly add to cost of the structure and construction time. However, prefabricated (or “modular”) building systems typically have increased transport and shipping costs due to their typically cumbersome configurations and the fact that shipping costs are generally predicated on the volume of the materials shipped, rather than their weight. Further, modular building systems (especially those made of light gauge metal) generally do not provide rounded comers, though rounded comers may provide both structural and aesthetic benefits.
The parts of a steel frame building are typically built to order in accordance with architectural plans, then trucked to the building site and assembled piece-by-piece with the use of a truck-mounted crane. This type of construction has many advantages, but it is expensive because of the skilled crew and expensive equipment needed to assemble the building.
Some builders have reduced their material and labor costs by using light-weight steel channels in sizes equal or close to wood standards. This method permits the use of standard building components such as interior and exterior sheathing, insulation, doors, windows, stairs and similar components. Innovation has been responsible for an increased number of patents issued on modular building systems and components used in such systems. For example, many patents have been issued on building trusses. Sheppard, U.S. Pat. No. 4,616,453, discloses a light gauge steel building system and truss design. Wormser, U.S. Pat. No. 3,462,895, discloses a symmetrical shelter truss. Davenport, U.S. Pat. No. 4,435,940 discloses a metal building truss employing top and bottom cords made of channel steel material. Funk, U.S. Pat. No. Des. 297,864, discloses a bolt-together truss assembly employing channel steel members. Dividoff, U.S. Pat. No. 4,748,784, discloses a triangulated roof truss structure.
Many building systems employ specialized brackets for establishing connective joints between standardized, dimensional structural members. Brackets formed from sheet metal are popular for joining dimensional wood lumber. Such brackets are disclosed in Gilb, U.S. Pat. No. 5,372,448 and Southerland, U.S. Pat. No. 4,335,555. Two patents issued to Fritz, U.S. Pat. Nos. 4,9041,496 and 4,930,268, disclose building brackets. The former is a two-piece roof peak bracket and the latter, a two-piece post-to-roof beam bracket. Andrews, U.S. Pat. No. 4,773,192, discloses brackets used to connect structural members with interlocking or indexing shapes. Dufour, U.S. Pat. No. 4,974,387, discloses a prefabricated joint used to join steel trusses and dimensional steel members. McElhoe, U.S. Pat. No. 4,041,659, discloses a metal building structure employing tabs and brackets for securing structural steel members. Hale, U.S. Pat. No. 4,809,480 discloses a set of brackets used to join rafters, at the peak, to the columns and the columns to a supporting surface. Brown, U.S. Pat. No. 3,717,964, discloses a modular building frame system employing indexing tabs and stops to facilitate assembly. Gibson, U.S. Pat. No. 6,047,513 describes a steel construction system that purports to minimize parts through the use of connectors with variable geometry.
The patent art for building systems consists in large part of prefabricated systems. Trusses and frames are manufactured at a central site and shipped to the construction site. For example, Hays, U.S. Pat. No. 5,983,577, discloses a method for forming a modular building system using only nine prefabricated members and three multipurpose connectors, wherein the trusses and frames are prefabricated for later erection in the field. While saving costs by prefabrication, the cost of erecting the buildings is then significantly affected by the cost of transporting the prefabricated building components to the site. This cost is often relatively high because building fabrications, such as trusses, are typically cumbersome to transport and shipping costs are usually predicated on the volume of the materials shipped, rather than their weight. Prefabrication also limits the use of steel framing to producing multiple copies of one design and is generally not applicable to single applications of a specific architectural design.
A connector is disclosed for use in a building system. The three-dimensional aspect of the present invention's connectors offers an exceptional advantage over existing flat or two-dimensional connectors. For example, the connectors of the present invention can be used to connect to structural members or channel members. Generally the connectors attach to three sides of dimensional lumber and to all three sides, both flanges and the web, of the channel members, for example C-channels. As a result, the connectors offer additional connective strength and rigidity. Trusses using these unique three-dimensional connectors can be used in light-gauge construction for both commercial and residential purposes.
In a preferred embodiment, the connector comprises a sheet having a primary portion and a plurality of flanges. The sheet defines a perforation between the primary portion and the flange so that the flange may be bent relative to the primary portion, preferably hand, which may be done manually, using one's bare hands, hand tools, a combination of both hand tools and one's bare hands, or another mechanical device to assist one in bending after shipping.
a shows various connectors incorporated in a modular system, according to a preferred embodiment.
b shows a T connector in use in
A connector 100 for use in a modular system 10 may be configured as a T connector 100a (as shown in
The connector 100 may be manufactured as a two-dimensional sheet with a primary portion 102 and one or more flanges 104, as shown in
As shown in
In an example of operation, a plurality of connectors 100 may be delivered to a construction site as planar sheets, thereby minimizing shipping costs, and the flanges 104 may then be selectively bent in relation to the primary portions 102 to form three-dimensional connectors 100 having channels 110. The perforations 106 allow the flanges 104 to be bent by hand. As shown in
As shown in
As shown in
As shown in
T connectors 100a and cornice connectors 100b having angles configured to result in a truss 11 having a predetermined length and pitch may be combined into a set, and other T connectors 100a and cornice connectors 100b having angles configured to result in trusses having different predetermined lengths and pitches may be combined into different sets. A builder may then choose a set appropriate for the desired use.
The invention herein describes connector for use in joining structural members in erecting a building. The connector comprises a planar sheet having a primary portion and a flange. Said sheet contains a series of perforations between the primary portion and the flange the perforations of configurations and dimensions sufficient to allow a user to bend the flange relative to the primary portion by hand. Bending by hand may be done manually, using one's bare hands, hand tools, a combination of both hand tools and one's bare hands, or another mechanical device to assist one in bending after shipping.
Those skilled in the art appreciate that variations from the specified embodiments disclosed above are contemplated herein. The description should not be restricted to the above embodiments, but should be measured by the following claims.
This application claims priority under 35 U.S.C. 119(c) from U.S. Provisional Application No. 60/720124, filed Sep. 23, 2005, which application is incorporated herein by reference.
| Number | Date | Country | |
|---|---|---|---|
| 60720124 | Sep 2005 | US |
