CONSTRUCTION OF LOW- AND MID-RISE BUILDINGS UTILIZING STRUCTURALLY HYBRID WALL, ROOF, OR FLOOR ASSEMBLIES
Disclosed is a system and method for constructing low- and mid-rise buildings combining structurally inter-dependent components of conventional Panelized construction and conventional Structural frame construction systems to achieve greater efficiencies of overall building energy use and structural performance than conventional applications of either system alone allows.
Current low- and mid-rise building construction (up to 5 floor levels for the purposes of this disclosure) overwhelmingly relies on one of two primary means of creating structural resistance to gravity loading in buildings: 1. Structurally distributive (commonly known as Stick-Built or Stick-Framing), and 2. Structurally framed with non-load bearing infill walls (commonly known as Column and Beam or Structural Frame). Both systems have been in ubiquitous use for centuries, with significant optimizations introduced with the advent of industrial processes in the early 20th Century and are currently fully optimized relative to the priorities of the times in which they were industrialized, specifically ease of erection and minimized cost. In general, the optimization of a system also defines that system's limitations, and in the specific case of these two building construction systems, those limitations significantly limit possible efficiencies relative to two primary 21st Century imperatives: reduction or elimination of Embodied Carbon and reduction or elimination of Operational Energy usage. For the purposes of this disclosure, Embodied Carbon is the sum of all energy expenditures necessary to manufacture, deliver, and assemble components of a building project, expressed in terms of Carbon expenditures necessary for these tasks. For the purposes of this disclosure, Operational Energy is the amount of energy of all types consumed in the ongoing operation of an occupied building.
Two economy-of-scale optimizations developed to increase the speed and constructional efficiency of Stick-Built construction are industrial processes known commonly as Panelized construction and Modular construction. In both Panelized and Modular processes, the act of Stick-Framing is simply moved into the controlled environment of a factory for significant portions of the building process. Panelized techniques create stick-framed segments of a Wall, Roof, or Floor assembly for on-site assembly, while Modular processes create stick-framed, structurally independent boxes comprised of complete Wall, Roof, or Floor assemblies. All optimizations and limitations of conventional stick-building remain fully intact in the final product of both processes. To maximize economies of scale, Panelized and Modular components are manufactured in permanent, centralized facilities of industrial scale and process, and as a direct consequence of this centralized manufacturing model, rely upon suppling building sites many hundreds of miles away for economic viability.
Stick Framing techniques, including Panelized and Modular construction techniques, are structurally distributive, i.e.: all members of all assemblies are structural and are sized and arrayed to carry and distribute gravity loads (weight) as a primary system attribute. Additionally, horizontal and vertical members provide attachment surfaces for interior and exterior closure materials of standard dimensions. Economies of scale in Panelized and Modular construction techniques generally favor larger and fewer and consequently heavier Panels and Modules, the primary constraint on size being physical and regulatory transport limitations from factory to job site. As a consequence of the above, Panelized and Modular construction techniques result in significant high Embodied energy intensities in the fabrication, movement, and installation of Panels and modules, as well as significant material intensities resulting from the need to resist the enormous stresses imposed on these Panels and modules during their fabrication, movement, transport, and installation.
Structural frame construction techniques concentrate gravity loads from horizontal and vertical surfaces into horizontal beams and vertical columns. Non-load bearing infill assemblies between columns are constructed in a manner similar to Stick-Framing, primarily to create vertical and horizontal attachment surfaces for interior and exterior closure materials. This system results in significant material intensities in the structural frame to resist gravity forces, without resulting in any significant offsetting efficiencies in Wall, Roof, or Floor assemblies because of the necessity of transferring the weight of interior and exterior finished surfaces, materials, and assemblies, as well as structural and live loads, directly to the horizontal and vertical members of the structural frame.
Given current, long-standing techniques and priorities of optimization, neither structurally distributive systems or structural frame systems can be re-optimized to 21st century priorities and remain as distinct systems without compromising overall structural integrity or incurring unacceptable cost penalties.
One important and readily quantifiable indicator of thermal performance (a primary component of Operational Energy usage intensity) of thermally exposed Wall, Roof, or Floor assemblies, together referred to as the ‘Thermal Envelope’, is called the ‘Framing Factor’. The Framing Factor represents the percentage of surface area of the Thermal Envelope where Framing members (load bearing or non-load bearing members providing attachment surfaces for interior and exterior closure materials) create a direct physical connection between the interior and exterior facing closure layers of Wall. Roof, or exposed Floor Assemblies. This direct connection is commonly referred to as a Thermal Bridge. Because Framing members are either poor thermal insulators (in the case of wood) or thermal conductors (in the case of steel), Thermal Bridging results in a significant degradation of the overall performance of the Thermal Envelope as regards its ability to resist transfer of thermal energy between interior and exterior environments. This degradation of overall Operational Energy usage performance can be up to 24% in a wood-framed wall assembly, and over 60% in a steel-framed wall assembly.
It is important to note that in context of reducing Operational Energy, it is not the absolute amount of wood or steel in a Wall, Floor, or Roof assembly, but the amount of wood or steel in a Wall, Floor, or Roof assembly acting as Thermal Bridges. In current legacy construction techniques, herein identified as structurally distributive systems and structural frame systems, these systems by their nature fundamentally require all Framing members to be Thermal Bridges. The contemplated hybrid system in this disclosure significantly reduces the overall amount of Framing members acting also as Thermal Bridges while achieving similar structural capabilities.
TECHNICAL FIELDThe present invention relates generally to the building construction industry and relates specifically to a building construction system and method for constructing low- and mid-rise buildings utilizing structurally inter-dependent Panelized building construction techniques combined with Structural Frame building construction techniques to effect a structurally hybridized system and method of construction.
SUMMARY OF THE INVENTIONThe current Invention proposes a new structurally hybrid system of inter-dependent Panels and Column and Beam Framing members. In a preferred embodiment, the current invention concerns itself with wood construction.
In the proposed new structurally hybrid system, Panels are optimized for 21st Century concerns, i.e.: minimization of overall Embodied Carbon and minimization of ongoing Operational Energy usage. As a result of these new optimizations, the Panelized construction components of the proposed hybrid system are significantly optimized in material disposition and cannot, by themselves, function structurally as an independent system. Additionally, Column and Beam Framing components of the proposed hybrid system are significantly reduced in material intensity, a system optimization which cannot, of itself, function structurally as an independent system. However, as an inter-dependent hybrid of optimized Structurally Distributive and optimized Structural Column and Beam systems, the proposed new structurally hybrid system of the current invention maintains equivalent overall structural properties with significant improvements in overall Operational Energy usage and significant reduction of overall Embodied Carbon intensity of Wall, Roof, or Floor assemblies as compared with current Structurally Distributive and Structural Column and Beam construction methodologies applied as discrete systems as described above.
In the proposed structurally hybrid system of the current invention, Wall, Roof, or Floor Panels, relieved of the necessity of being primary structural components, are optimized to minimize Thermal Bridging. An additional benefit is an overall reduction of material use intensity in Wall, Roof, or Floor Panel closure assemblies.
Additionally, in the proposed structurally hybrid system of the current invention, Structural Column and Beam components, relieved of the necessity of being primary structural components, are reduced in frequency, reducing Thermal Bridging where structural columns and beams within the Thermal Envelope assembly create zones of reduced thermal resistance. An additional benefit is an overall reduction of material use intensity in Column and Beam components.
In a preferred embodiment, an additional significant innovation of the current Invention is minimized Panel size. In the proposed hybrid system of the current invention, to reduce the Embodied Carbon usage penalty incurred by conventional industrial-scale manufacturing and construction practices, all Panels and inter-dependent structural Framing members necessary to fully enclose a complete exterior weather-tight Building Envelope, as well as all Panels and inter-dependent Framing members necessary to fully enclose interior dependent spaces (bathrooms, bedrooms, storage, mechanical, and the like) are sized to be readily manufactured, moved and erected by no more than 2 persons, with no specific expertise and without the aid of industrial-scaled machines or apparatuses such as cranes for lifting and placing of individual Panels and components.
In a preferred embodiment, reduced weight and size of individual system components, allowing non-industrial scale manufacturing, loading and unloading for shipping and transport, as well as on-site assembly, significantly reduces the overall Embodied Carbon profile of a building project: Manufacturing can temporarily occur close to the building site, in any available space of appropriate size, rather than in industrial-sized permanent facilities, resulting in reduced Carbon impact of long distance shipping from a centralized facility to a construction site, potentially many hundreds of miles away. Additionally, in a preferred embodiment, ordinary small power tools and low energy intensity processes are sufficient to produce, transport, and erect all building components, further reducing the Embodied Carbon profile of a given building project.
In contrast to current centralized and industrial-scaled manufacturing techniques for Panelized and Modular construction, the current invention contemplates an agile and multi-centered manufacturing approach, allowing dynamic and rapid creation, moving, expanding, contracting, and redeployment of manufacturing facilities as best fits immediate demand for this product across multiple regions and markets.
In a preferred embodiment, an additional benefit of reduced weight and size of individual building components is that many building sites, such as crowded urban areas, that are inaccessible to large, mechanized equipment become readily accessible to construction practices based on utilizing small-scale components which can be moved and erected manually by 2 persons, as described in this disclosure.
In a preferred embodiment of the current Invention, many interior components such as intermediate flooring (in multi-story configurations) and Interior partitioning assemblies may also be created as components utilizing the disclosed structural hybrid system and method, and of such size, weight, and configuration to maximize structural material use efficiency while designed to be readily assembled, shipped, and erected by no more than 2 persons without aid of industrial-scale lifting devices or apparatuses.
An additional benefit of a preferred embodiment is that it can, by its nature, be completely taken apart and moved, as well as partially taken apart and expanded or reconfigured, by no more than 2 persons, reusing all disassembled pieces allowing virtually waste-free disassembly and reconfiguration, without aid of industrial-scaled lifting devices or apparatuses.
Additionally, as a direct benefit of the decentralized and non-permanent nature of the herein described manufacturing model of the contemplated system and method, new manufacturing facilities can be quickly set up and made operational as a consequence of direct and immediate need, such as in response to a natural disaster.
It is important to note that the contemplated Wall, Roof, or Floor assemblies can be utilized as independent assemblies or as co-dependent assemblies in any combination without departing from the spirit and scope of the current invention as generally defined in this disclosure.
It will be apparent to those of ordinary skill in the art that the contemplated system and method of the current invention can be readily applied without limitation to a wide variety of building configurations, types, and occupancies currently utilizing Stick-Framed, Column and Beam, Panelized, and Modular systems and methodologies for low- to mid-rise construction projects, with attendant benefits as described above.
The subject matter which is regarded as the invention is particularly pointed out and distinctly claimed in the claims at the conclusion of the specification. While the present disclosure has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by one of ordinary skill in the art that many modifications and variations may be made therein without departing from the spirit and scope as generally defined in this disclosure. The descriptions of the various embodiments of the present invention have been presented for purposes of illustration only and are not intended to be exhaustive or prescriptive or for purposes of limitation. The scope of the present invention is therefore not defined by the brief description of the several views of the drawings of the invention, but by the Claims. The foregoing and other features and advantages of the invention are apparent from the following detailed description taken in conjunction with the accompanying drawings in which:
All numerical dimensions, quantities, or measuring systems recited in this specification describe a preferred embodiment only and are not intended as prescriptive or for purposes of limitation. Additionally, it will be readily apparent to one of average skill in the art that these dimensional references have metric analogues in those countries that commonly utilize a Metric measuring system.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTWhile the present disclosure has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by one of ordinary skill in the art that many modifications and variations may be made therein without departing from the spirit and scope as generally defined in this disclosure. The descriptions of the various embodiments of the present invention have been presented for purposes of illustration only and are not intended to be exhaustive or prescriptive or for purposes of limitation. Descriptions and Terminology used herein have been chosen to best explain the principles of the embodiments, the practical application or technical improvement over systems, methods, and techniques currently predominant in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein. The scope of the present invention is therefore not defined by the detailed description of the invention, but by the Claims.
Also, the grammatical articles “one”, “a”, “an”, and “the”, as used in this specification, are intended to include “at least one” or “one or more”, unless otherwise indicated. Thus, the articles are used in this specification to refer to one or more than one (i.e., to “at least one”) of the grammatical objects of the article. By way of example, “a component” means one or more components, and thus, possibly, more than one component is contemplated and can be employed or used in an implementation of the described processes, compositions, and products. Further, the use of a singular noun includes the plural, and the use of a plural noun includes the singular, unless the context of the usage requires otherwise.
Also, only structural materials, systems and assemblies are revealed in these drawings, but it will be readily apparent to one of average skill in the art that non-structural features such as, but not limited to, insulating materials, weather and water resistant layers, windows, doors, exterior and interior finish materials, as well as systems such as electrical, HVAC, and plumbing can be integrated or applied in a multiplicity of combinations with the materials, systems and assemblies illustrated to create complete, climate- and use-appropriate exterior Wall, Roof, or Floor assemblies as components of the overall exterior envelope of a building project, as well as use-appropriate interior Wall or Floor assemblies consistent with the scope and spirit of the described embodiments.
Also, various features and characteristics of the invention are described in this specification to provide an overall understanding of the disclosed Wall, Roof, or Floor components and method of assembly. It is understood that the various features and characteristics described in this specification can be combined in any suitable manner regardless of whether such features and characteristics are expressly described in combination in this specification. The Applicant expressly intends such combinations of features and characteristics to be included within the scope of this specification. As such, the claims can be amended to recite, in any combination, any features and characteristics expressly or inherently described in, or otherwise expressly or inherently supported by, this specification. Furthermore, the Applicant reserves the right to amend the claims to affirmatively disclaim features and characteristics that may be present in the prior art, even if those features and characteristics are not expressly described in this specification. Therefore, any such amendments will not add new matter to the specification or claims and will comply with written description and sufficiency of description requirements (e.g., 35 U.S.C. sctn. 112(a) and Article 123(2) EPC). The Wall, Roof, or Floor structures and methods disclosed in this specification can comprise, consist of, or consist essentially of the various features and characteristics described in this specification.
Also, any numerical dimensions, quantities, or measuring systems recited in this specification describe a preferred embodiment only and are not intended as prescriptive or for purposes of limitation. All referenced dimensions for dimensional lumber are referenced as nominal dimensions (in inches), as is customary in wood construction practices in countries utilizing the Imperial (feet and inches) measuring system. It is readily apparent to one of average skill in the art that these dimensional references have metric analogues in those countries that commonly utilize a Metric measuring system.
The disclosure set forth above may encompass multiple distinct examples with independent utility. Although each of these has been disclosed in its preferred form(s), the specific examples thereof as disclosed and illustrated herein are not to be considered in a limiting sense, because numerous variations are possible. To the extent that section headings are used within this disclosure, such headings are for organizational purposes only. The subject matter of the disclosure includes all novel and nonobvious combinations and sub-combinations of the various elements, features, functions, or properties disclosed herein. The preceding claims particularly point out certain combinations and sub-combinations regarded as novel and nonobvious. Other combinations and sub-combinations of features, functions, elements, or properties may be claimed in applications claiming priority from this or a related application. Such claims, whether broader, narrower, equal, or different in scope to the original claims, also are regarded as included within the subject matter of the present disclosure.
Claims
1. A hybrid system of structurally inter-dependent prefabricated Panel components and Column and Beam Framing components and method of their production and installation for creation of Wall, Floor, or Roof assemblies of low-rise and mid-rise buildings, including: a plurality of non-structural Wall, Floor, or Roof Panels and a plurality of non-structural Column and Beam Framing members, the mechanical affixment of Panels and Framing members creating structurally hybrid Wall, Floor, or Roof assemblies of equivalent structural properties to conventional stand-alone Stick-framed, Panelized, Modular, and Column and Beam systems and methods of building construction.
2. The hybrid system of claim 1, wherein a plurality of Panel components is of insufficient structural integrity to effect a structurally independent system.
3. The hybrid system of claim 1, wherein a plurality of Column and Beam Framing components is of insufficient structural integrity to effect a structurally independent system.
4. The hybrid system of claim 1, wherein the mechanical affixment of a plurality of Panel components and Column and Beam Framing members creates structurally hybrid Wall, Floor, or Roof assemblies of equivalent structural properties to conventional stand-alone systems.
5. The hybrid system of claim 1, wherein Panel components are prefabricated from pieces, parts, and connectors of standard dimension and ready retail availability.
6. The hybrid system of claim 1, wherein Column and Beam Framing components utilize pieces, parts, and connectors of standard dimension and ready retail availability.
7. The hybrid system of claim 1, wherein a reduced intensity of members subject to Thermal Bridging is effected.
8. The hybrid system of claim 1, wherein reduced component size and weight effects economies of manufacture, shipping, and assembly.
9. The hybrid system of claim 1, wherein completed buildings can be readily partially or fully unassembled and moved or reconfigured and reassembled in whole or in part.
10. The hybrid system of claim 1, wherein the system is applicable to exterior Wall, Roof, or Floor assemblies comprising the Thermal Envelope.
11. The hybrid system of claim 1, wherein the system is applicable to interior Wall, Floor, Intermediate Floor, or Ceiling assemblies defining interior functional areas and spaces.
12. The hybrid system of claim 1, wherein the method of manufacture, shipping, and assembly does not require large scale industrial processes, facilities, or equipment.
13. The Panel components of claim 2, wherein the method of their manufacture allows individual Panel components to be assembled manually by no more than one person.
14. The hybrid system of claim 1, wherein the movement of individual completed components for purposes of organization, loading and unloading, shipping, storage, and assembly can be effected manually by no more than 2 persons without the use of large-scale industrial processes, facilities, or equipment.
15. The hybrid system of claim 1, wherein manufacturing capabilities are effected through small-scale manufacturing facilities of low energy use intensity.
16. The hybrid system of claim 1, wherein expansion of total manufacturing capabilities may be effected by opening a plurality of new small-scale manufacturing facilities of low energy use intensities.
17. The hybrid system of claim 1, wherein rapid expansion of manufacturing capabilities is effected by opening a plurality of temporary small-scale manufacturing facilities of low energy use intensity, especially in response to immediate housing need scenarios, such as natural disasters.
18. The Panel components of claim 2, wherein the placing and mechanical affixment of individual completed Panel components within a hybrid system can be effected manually by no more than 2 persons without the use of large-scale industrial processes, facilities, or equipment.
19. The Column and Beam Framing components of claim 3, wherein the placing and mechanical affixment of individual Framing components within a hybrid system can be effected manually by no more than 2 persons without the use of large-scale industrial processes, facilities, or equipment.
20. The hybrid system of claim 1, wherein complete start-to-finish building assembly may be effected by “Do-It-Yourself” persons or entities, without specialized skills, tools, or industrial-scaled equipment.
Type: Application
Filed: Jul 27, 2023
Publication Date: Feb 1, 2024
Inventor: ROBERT BENNETT GILLIG (CAMBRIDGE, MA)
Application Number: 18/360,757