ES2914819A1 - Structural sheet system (Machine-translation by Google Translate, not legally binding) - Google Patents
Structural sheet system (Machine-translation by Google Translate, not legally binding) Download PDFInfo
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- ES2914819A1 ES2914819A1 ES202230128A ES202230128A ES2914819A1 ES 2914819 A1 ES2914819 A1 ES 2914819A1 ES 202230128 A ES202230128 A ES 202230128A ES 202230128 A ES202230128 A ES 202230128A ES 2914819 A1 ES2914819 A1 ES 2914819A1
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- structural sheet
- sheet metal
- structural
- metal system
- osb
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/43—Floor structures of extraordinary design; Features relating to the elastic stability; Floor structures specially designed for resting on columns only, e.g. mushroom floors
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
- E04C2/284—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating
- E04C2/296—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating composed of insulating material and non-metallic or unspecified sheet-material
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
- E04C2/32—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure formed of corrugated or otherwise indented sheet-like material; composed of such layers with or without layers of flat sheet-like material
- E04C2/322—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure formed of corrugated or otherwise indented sheet-like material; composed of such layers with or without layers of flat sheet-like material with parallel corrugations
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Building Environments (AREA)
Abstract
Description
DESCRIPCIÓNDESCRIPTION
Sistema de chapa estructuralStructural Sheet Metal System
SECTOR DE LA TÉCNICATECHNICAL SECTOR
La presente invención se refiere a un sistema de chapa estructural, destinado a ofrecer un sistema estructural de fácil y rápido montaje sin necesidad de hormigón en el proceso.The present invention relates to a structural sheet metal system, intended to offer a structural system that is easy and quick to assemble without the need for concrete in the process.
La invención va desde una variante de realización más sencilla, obtenida a partir de una chapa estructural, pasando por otras dos variantes más complejas consistentes en una chapa estructural reforzada con tableros de OSB (Oriented Strand Board/Tablero de viruta orientada) con o sin aislamiento interior.The invention ranges from a simpler embodiment variant, obtained from a structural sheet, through two other more complex variants consisting of a structural sheet reinforced with OSB boards (Oriented Strand Board) with or without insulation inside.
Se trata de un sistema de paños estructurales, horizontales o inclinados, a base de elementos de placas metálicas en onda. Todas las uniones en obra son atornilladas y/o remachadas.It is a system of structural panels, horizontal or inclined, based on wave metal plate elements. All on-site joints are screwed and/or riveted.
El sistema se puede complementar con la utilización de tableros OSB en la parte superior para el apoyo de solado, con omegas metálicas en la parte inferior para la colocación de falsos techos y con aislamiento interior.The system can be complemented with the use of OSB boards in the upper part to support the flooring, with metal omegas in the lower part for the placement of false ceilings and with interior insulation.
La invención se sitúa pues dentro del campo de los sistemas estructurales para la edificación, industria, almacenamiento, etc.The invention is therefore situated within the field of structural systems for building, industry, storage, etc.
El objeto de la invención es proporcionar un sistema ligero, fácil de montar, seguro para el trabajador, reutilizable, reciclable 100% y con gran capacidad de aislamiento térmico.The object of the invention is to provide a light system, easy to assemble, safe for the worker, reusable, 100% recyclable and with a high thermal insulation capacity.
ANTECEDENTES DE LA INVENCIÓNBACKGROUND OF THE INVENTION
En la actualidad los sistemas estructurales utilizados habitualmente en edificación se basan en estructuras de hormigón armado, prefabricados de hormigón (más habituales en edificación industrial), estructuras con muros portantes de fábrica, estructuras de acero o mixtas.Currently, the structural systems commonly used in construction are based on reinforced concrete structures, prefabricated concrete (more common in industrial construction), structures with load-bearing masonry walls, steel structures or mixed.
Existen otros como sistemas de estructuras de madera, con una presencia minoritaria.There are others such as systems of wooden structures, with a minority presence.
En los primeros casos se utiliza hormigón de manera total o parcial y son estructuras con un peso medio superior a los 300,00 kP/m2.In the first cases, concrete is used totally or partially and they are structures with an average weight greater than 300.00 kP/m2.
El consumo de materia es enorme y los procesos de ejecución son lentos, tanto por los procedimientos de trabajo “in situ” (salvo en el caso de prefabricados de hormigón armado) como por el propio proceso de fraguado que requiere el hormigón.The material consumption is enormous and the execution processes are slow, both due to the “in situ” work procedures (except in the case of prefabricated reinforced concrete) and due to the setting process itself that the concrete requires.
Asimismo, por regla general, estos sistemas estructurales convencionales no son fácilmente reciclables.Also, as a general rule, these conventional structural systems are not easily recyclable.
Por otro lado existen en el mercado elementos tipo panel sándwich para aislamiento, pero que no son elementos estructurales.On the other hand, there are sandwich panel-type elements for insulation on the market, but they are not structural elements.
En el presente caso se trata de un elemento estructural que, en su versión con aislamiento interior, se constituye como una solución excelente para los casos en los que es preciso un alto aislamiento térmico (envolventes térmicas, forjados, cámaras frigoríficas,...).In the present case it is a structural element that, in its version with internal insulation, constitutes an excellent solution for cases in which high thermal insulation is required (thermal envelopes, floors, cold rooms,...) .
EXPLICACIÓN DE LA INVENCIÓNEXPLANATION OF THE INVENTION
El sistema de chapa estructural que se preconiza resuelve de forma plenamente satisfactoria la problemática anteriormente expuesta, en base a una solución sencilla pero de gran eficacia.The structural sheet metal system that is recommended solves the aforementioned problems in a fully satisfactory way, based on a simple but highly effective solution.
Para ello, y de forma más concreta, de acuerdo con la variante de realización mas sencilla de la invención, se trata de una chapa de acero plegada en forma de W de espesor de1,5 mm.For this, and more specifically, according to the simplest embodiment of the invention, it is a steel sheet folded in a W shape with a thickness of 1.5 mm.
Esta chapa se apoya en la estructura portante vertical y puede reforzarse con tablero de OSB atornillado y/o remachado, así como con elementos de ignifugación, protección contra incendios (lana mineral, placas de yeso laminado,...) y aislamiento térmico. This sheet is supported by the vertical load-bearing structure and can be reinforced with an OSB board screwed and/or riveted, as well as fireproofing elements, fire protection (mineral wool, plasterboard,...) and thermal insulation.
Puede ser utilizado de manera conjunta con sistemas portantes metálicos o se puede aplicar combinada con otros sistemas de estructura portante dada su versatilidad y facilidad de montaje.It can be used together with metal load-bearing systems or it can be applied in combination with other load-bearing structure systems given its versatility and ease of assembly.
Si bien el modo de realización de estos objetos y el sistema estructural de la presente invención comparte algunos planteamientos con otros sistemas dentro del estado de la técnica, es el único sistema que presenta el siguiente conjunto de ventajas:Although the embodiment of these objects and the structural system of the present invention shares some approaches with other systems within the state of the art, it is the only system that presents the following set of advantages:
a) Reducción en los plazos de ejecución del sistema estructural.a) Reduction in the terms of execution of the structural system.
El sistema de la invención se fundamenta en la realización en taller de la chapa estructural, transporte a la obra y posterior montaje de la misma. De esta manera se estima que, para el caso de una estructura habitual de vivienda, el montaje de la estructura horizontal llevaría 1 día por planta. Si comparamos con un sistema convencional podemos estar hablando de un ahorro de 1 semana por planta.The system of the invention is based on the realization of the structural sheet in the workshop, transport to the work and subsequent assembly of the same. In this way, it is estimated that, in the case of a normal housing structure, the assembly of the horizontal structure would take 1 day per floor. If we compare with a conventional system we can be talking about a saving of 1 week per plant.
El procedimiento es sencillo:The procedure is simple:
Todos los elementos se hacen en fábrica.All elements are made in the factory.
Una vez que la cimentación y la estructura portante vertical (parte que no pertenece a este sistema) se encuentran perfectamente niveladas y con los elementos necesarios para recibir el sistema de la invención, se transportan todos los elementos a la obra y se van colocando conforme a un procedimiento y un orden perfectamente establecido de manera previa.Once the foundation and the vertical bearing structure (part that does not belong to this system) are perfectly level and with the necessary elements to receive the system of the invention, all the elements are transported to the work and placed according to a procedure and an order perfectly established in advance.
Se colocan las chapas onduladas, a las que se aplicará una unión mecánica al subsistema portante en los apoyos inferiores.The corrugated sheets are placed, to which a mechanical joint will be applied to the load-bearing subsystem at the lower supports.
Como paso final se incluirá un tablero, si así se desea para tener un apoyo plano, en la cara superior de las ondas, atornillado con tornillos autotaladrantes a las mismas.As a final step, a board will be included, if desired to have a flat support, on the upper face of the waves, screwed with self-drilling screws to them.
b) Reducción en la mano de obra necesaria en la ejecución de la estructura así como de los trabajos a realizar “in situ”. b) Reduction in the manpower required in the execution of the structure as well as the work to be carried out “in situ”.
El sistema se construye en taller, de manera protegida frente a los elementos climatológicos, lo que redunda en una reducción de plazos adicional en el caso de épocas de lluvias. Se reduce así los trabajos que son necesarios realizar en obra.The system is built in a workshop, protected from the elements, which results in an additional reduction in terms in the case of rainy seasons. This reduces the work that needs to be done on site.
El sistema se construye en taller por mano de obra muy cualificada y con maquinaria de precisión. El montaje en obra lo realiza personal especialmente cualificado, estimándose únicamente la necesidad de 3 personas en el caso más habitual: una persona que maneje la grúa y dos personas en el montaje. De esta manera se consigue reducir la mano de obra necesaria.The system is built in the workshop by a highly qualified workforce and with precision machinery. On-site assembly is carried out by specially qualified personnel, estimating only the need for 3 people in the most common case: one person to handle the crane and two people to do the assembly. This reduces the labor required.
c) Eliminación de la obra húmeda.c) Elimination of wet work.
El sistema elimina la necesidad de realizar una capa de compresión, suprimiéndose así la utilización de hormigón. Esto supone un gran avance tanto en reducción de peso, en reducción de plazo, reducción de personal en obra, incremento en la seguridad en obra y facilidad de montaje. La función de la capa de compresión se puede realizar con tableros de OSB. En el caso de necesidades especiales para zonas con cargas mayores se utilizarán refuerzos de textiles de fibra de carbono, tanto de disposición en malla como unidireccionales.The system eliminates the need for a compression layer, thus eliminating the use of concrete. This represents a great advance in terms of weight reduction, time reduction, reduction of personnel on site, increased safety on site and ease of assembly. The function of the compression layer can be performed with OSB boards. In the case of special needs for areas with higher loads, carbon fiber textile reinforcements will be used, both mesh and unidirectional.
d) Reducción del peso de la estructura y, como consecuencia, reducción en costes de cimentación.d) Reduction in the weight of the structure and, as a consequence, reduction in foundation costs.
El sistema, debido a la geometría de su onda, tiene unas características de resistencia estructural muy altas son un peso de entre 10 y 20 veces inferior a los sistemas estructurales habituales. Esta ventaja afecta también a la cimentación, reduciéndose el coste de la misma.The system, due to the geometry of its wave, has very high structural resistance characteristics and weighs between 10 and 20 times less than the usual structural systems. This advantage also affects the foundation, reducing its cost.
e) Reducción del riesgo para la seguridad y salud en obra en la fase de estructura.e) Reduction of the risk for safety and health at work in the structure phase.
Debido a su ligereza, el sistema puede ser manipulado en obra sin necesidad incluso de maquinaria (3 personas pueden mover una onda de 6 m. de largo por 0,5 m. de anchura sin dificultad) lo que redunda tanto en la rapidez de ejecución como en un incremento en la seguridad en obra.Due to its lightness, the system can be manipulated on site without even needing machinery (3 people can move a 6 m long by 0.5 m wide wave without difficulty), which results both in the speed of execution as in a increased safety on site.
Una vez colocado el sistema se puede caminar sobre el mismo, incrementándose la seguridad en obra.Once the system is in place, it can be walked on, increasing safety on site.
f) Sistema estructural totalmente reciclable.f) Totally recyclable structural system.
Al ser una estructura de acero, el sistema es totalmente reciclable.Being a steel structure, the system is fully recyclable.
g) Sistema estructural con un alto aislamiento térmico.g) Structural system with high thermal insulation.
Al tener aislamiento interior (en su variante mas compleja) espesores de aislante que van desde los 110 mm. hasta los 248 mm. de aislante, único sistema estructural con estas características en el mercado.By having internal insulation (in its most complex variant) insulation thicknesses ranging from 110 mm. up to 248mm. of insulation, the only structural system with these characteristics on the market.
BREVE DESCRIPCIÓN DE LOS DIBUJOSBRIEF DESCRIPTION OF THE DRAWINGS
Para complementar la descripción que seguidamente se va a realizar y con objeto de ayudar a una mejor comprensión de las características del invento, de acuerdo con un ejemplo preferente de realización práctica del mismo, se acompaña como parte integrante de dicha descripción, un juego de planos en donde con carácter ilustrativo y no limitativo, se ha representado lo siguiente:To complement the description that is going to be made below and in order to help a better understanding of the characteristics of the invention, according to a preferred example of its practical embodiment, a set of plans is attached as an integral part of said description. where, by way of illustration and not limitation, the following has been represented:
La figura 1.- Muestra una vista en perspectiva axonométrica de la variante de realización mas sencilla de la presente invención.Figure 1.- Shows an axonometric perspective view of the simplest embodiment variant of the present invention.
La figura 2.- Muestra una vista en sección/perfil del dispositivo de la figura 1.Figure 2.- Shows a section/profile view of the device in Figure 1.
La figura 3.- Muestra una vista lateral del dispositivo de las figuras anteriores.Figure 3.- Shows a side view of the device of the previous figures.
La figura 4.- Muestra una vista en perspectiva axonométrica de una segunda variante de realización del sistema de la invención, en el que la chapa se complementa con un tablero OBS superior e inferior y tornillos autotaladrantes.Figure 4.- Shows an axonometric perspective view of a second embodiment variant of the system of the invention, in which the sheet metal is complemented by a board. Top and bottom OBS and self-drilling screws.
La figura 5.- Muestra una vista en sección/perfil del dispositivo de la figura 4.Figure 5.- Shows a section/profile view of the device in figure 4.
La figura 6.- Muestra una vista lateral del dispositivo de las figuras 4 y 5.Figure 6.- Shows a side view of the device of figures 4 and 5.
La figura 7.- Muestra una vista en perspectiva axonométrica de una tercera variante de realización del sistema de la invención, en el que la chapa se complementa con un tablero OBS superior e inferior, tornillos autotaladrantes y un aislante interior.Figure 7.- Shows an axonometric perspective view of a third embodiment variant of the system of the invention, in which the plate is complemented by an upper and lower OBS board, self-drilling screws and an internal insulator.
La figura 8.- Muestra una vista en sección/perfil del dispositivo de la figura 7.Figure 8.- Shows a section/profile view of the device of figure 7.
La figura 9.- Muestra una vista lateral del dispositivo de las figuras 7 y 8.Figure 9.- Shows a side view of the device of figures 7 and 8.
REALIZACIÓN PREFERENTE DE LA INVENCIÓNPREFERRED EMBODIMENT OF THE INVENTION
A la vista de las figuras reseñadas, y de acuerdo con la variante de realización mas sencilla de la invención, la mostrada en las figuras 1 a 3 puede observarse como la invención se constituye a partir de una chapa de acero de un espesor del orden de 1,5 mm que se pliega en forma de “W”, que puede fabricarse en diferentes dimensiones, con una longitud siempre menor de los 6 metros, y que en la variante de realización elegido, a modo meramente ejemplario, presenta una altura que puede ir desde los 110 a los 248 mm y una anchura comprendida entre los 485 y los 742 mm, en donde el número de pliegues puede variar entre 2 y 3 por pieza.In view of the figures outlined, and according to the simplest embodiment of the invention, the one shown in figures 1 to 3, it can be seen how the invention is constituted from a steel sheet with a thickness of the order of 1.5 mm that folds into a "W" shape, which can be manufactured in different dimensions, with a length always less than 6 meters, and which in the variant of execution chosen, merely as an example, has a height that can go from 110 to 248 mm and a width between 485 and 742 mm, where the number of folds can vary between 2 and 3 per piece.
Tal y como se ha dicho anteriormente, esta chapa se apoya en la estructura portante vertical, de manera que, de acuerdo con la variante de las figuras 4 a 6, puede reforzarse con sendos tableros superior (3) e inferior (4) de OSB que se fijan a la misma mediante tornillos y/o remaches (2), tableros que el ejemplo de realización elegida presentan un espesor del orden de 15mm.As has been said previously, this sheet is supported by the vertical load-bearing structure, so that, according to the variant of figures 4 to 6, it can be reinforced with both upper (3) and lower (4) OSB boards. which are fixed to it by means of screws and/or rivets (2), boards that in the chosen embodiment have a thickness of the order of 15mm.
Esta estructura puede completarse, de acuerdo con la variante de realización de las figuras 7 a 9, con un núcleo interior (5), como elemento de ignifugación, protección contra incendios (lana mineral, placas de yeso laminado,...) y aislamiento térmico.This structure can be completed, according to the embodiment variant of figures 7 to 9, with an inner core (5), as a fireproofing element, protection against fires (mineral wool, plasterboard,...) and thermal insulation.
Este núcleo puede tener unos espesores que van comprendidos entre los 110 y los 248mm.This core can have thicknesses ranging between 110 and 248mm.
El sistema así descrito puede ser utilizado de manera conjunta con sistemas portantes metálicos o se puede aplicar combinada con otros sistemas de estructura portante dada su versatilidad y facilidad de montaje.The system thus described can be used in conjunction with metal bearing systems or it can be applied in combination with other bearing structure systems given its versatility and ease of assembly.
A partir de esta estructuración, una vez que la cimentación y la estructura portante vertical (parte que no pertenece a este sistema) se encuentran perfectamente niveladas y con los elementos necesarios para recibir el sistema de la invención, se transportan todos los elementos a la obra y se van colocando conforme a un procedimiento y un orden perfectamente establecido de manera previa.From this structuring, once the foundation and the vertical bearing structure (part that does not belong to this system) are perfectly level and with the necessary elements to receive the system of the invention, all the elements are transported to the work and they are placed according to a procedure and an order perfectly established in advance.
A continuación se puede optar por un montaje “in situ”, colocando las chapas onduladas, a las que se aplicará una unión mecánica al subsistema portante en los apoyos inferiores, de manera que, como paso final se incluirá un tablero, si así se desea para tener un apoyo plano, en la cara superior de las ondas, atornillado con tornillos autotaladrantes a las mismas, u optar por la opción más adecuada que es transportar el sistema armado desde fábrica en cualquiera de sus tres opciones: sistema de chapa estructural, sistema de chapa estructural y tablero OSB o sistema de chapa estructural, tablero OSB y aislamiento y/o material ignífugo.Next, you can opt for an “in situ” assembly, placing the corrugated sheets, to which a mechanical joint will be applied to the load-bearing subsystem at the lower supports, so that, as a final step, a board will be included, if desired. to have a flat support, on the upper face of the waves, screwed to them with self-drilling screws, or opt for the most appropriate option, which is to transport the assembled system from the factory in any of its three options: structural sheet metal system, of structural veneer and OSB board or structural veneer system, OSB board and insulation and/or fire retardant material.
Esta estructuración elimina la necesidad de realizar una capa de compresión, suprimiéndose así la utilización de hormigón, reduciendo el peso, plazos y personal en obra, además de incrementar la seguridad y facilitar el montaje.This structuring eliminates the need for a compression layer, thus eliminating the use of concrete, reducing weight, deadlines and personnel on site, as well as increasing safety and facilitating assembly.
La función de la capa de compresión se puede realizar con tableros de OSB. En el caso de necesidades especiales para zonas con cargas mayores se utilizarán refuerzos de textiles de fibra de carbono, tanto de disposición en malla como unidireccionales. The function of the compression layer can be performed with OSB boards. In the case of special needs for areas with higher loads, carbon fiber textile reinforcements will be used, both mesh and unidirectional.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES202230128A ES2914819A1 (en) | 2022-02-16 | 2022-02-16 | Structural sheet system (Machine-translation by Google Translate, not legally binding) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES202230128A ES2914819A1 (en) | 2022-02-16 | 2022-02-16 | Structural sheet system (Machine-translation by Google Translate, not legally binding) |
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| Publication Number | Publication Date |
|---|---|
| ES2914819A1 true ES2914819A1 (en) | 2022-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| ES202230128A Pending ES2914819A1 (en) | 2022-02-16 | 2022-02-16 | Structural sheet system (Machine-translation by Google Translate, not legally binding) |
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| US20210277653A1 (en) * | 2020-03-06 | 2021-09-09 | United States Gypsum Company | Composite structure including a structural panel and a metal support |
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| JPH08246590A (en) * | 1995-01-12 | 1996-09-24 | Kawasaki Steel Corp | Mounting structure for floor panel |
| US20080289292A1 (en) * | 2007-05-23 | 2008-11-27 | Patrick Henry Giles | Corrugated decking flooring system |
| US20090151278A1 (en) * | 2007-12-18 | 2009-06-18 | Cornerstone Specialty Wood Products, Llc | Flooring system and method for installing involving a corrugated member and a panel flooring member |
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| WO2019034730A1 (en) * | 2017-08-16 | 2019-02-21 | Thyssenkrupp Steel Europe Ag | Steel trapezoidal profiled element and use thereof |
| CN208981624U (en) * | 2018-11-01 | 2019-06-14 | 扬州工业职业技术学院 | A kind of close corrugated steel of overlap joint |
| GB2581240A (en) * | 2019-12-05 | 2020-08-12 | Sigmat Ltd | A structural member |
| US20210277653A1 (en) * | 2020-03-06 | 2021-09-09 | United States Gypsum Company | Composite structure including a structural panel and a metal support |
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