JP2011058202A - Structure and building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure capable of inexpensively enhancing fire-resistance performance of a structural member and suppressing an increase in dimensions of a member, and a building. <P>SOLUTION: An infrared reflectance of an outer surface of a metal plate 2 for a column is increased to 0.4 or more. Thus, when a fire breaks out near the column, the infrared rays and radiant heat of the fire are reflected from the metal plate 2, and an increase in the temperature of the column 1 can be delayed to enable an improvement in the fire-resistance performance of the column 1. Additionally, since the omission of a fire resistive covering material and a decrease in thickness dimension can be achieved, the whole dimensions including the finishing of the column 1 can be suppressed, and an indoor space etc. can be effectively utilized. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a structure and a building, and more particularly to a structure that can enhance the fire resistance of a structure that is required to have fire resistance and fire resistance, such as a ship.

  For example, in the case of a building, generally, structural steel materials are required to have higher fire resistance depending on the place where they are used. For example, when used as a pillar or beam of a high-rise building, fire resistance performance of 1 hour is required from the first floor to the fourth floor counted from the top floor, and similarly counted from the fifth floor to the 14th floor In, the fire resistance performance of 2 hours is required, and similarly, the fire resistance performance of 3 hours is required at the 15th floor and above. Moreover, in the steel structure, fireproof performance such as fireproof performance for 30 minutes is required depending on the place used other than the above.

Specifically, in the case of a pillar, it is non-damaged for a given time (it does not cause damage such as deformation, melting, or destruction that would hinder structural strength in the event of a fire, or decrease in yield strength due to excessive temperature rise) Is required).
The strength of steel in buildings using structural steel materials will drop to about 2/3 of the normal temperature strength at 400 ° C. In the case of refractory steel, the strength of about 2/3 of the normal temperature strength at 600 ° C should be secured. However, it is desirable to prevent the strength of these steel materials from decreasing as much as possible in the event of a fire.

  Conventionally, as a fireproof structure in a structural material such as a building, for example, a rock wool material or the like is sprayed on the surface of a pillar to form a fireproof coating, or a fireproof coating material is wound, and the heat insulation effect of the fireproof coating material is used. A structure in which the temperature rise of the column is suppressed to prevent a decrease in strength is common (see, for example, Patent Documents 1 and 2). In addition, a method may be employed in which the heat capacity is increased by increasing the thickness or cross section of the column, and the temperature rise of the column is suppressed to prevent a decrease in strength. In any case, it is customary to attach a finishing material to the surface of the fireproof coated column due to aesthetic problems.

Japanese Patent Application Laid-Open No. 7-300912 JP 2002-70207 A

  However, in the conventional fireproof structure, the fireproof coating material is expensive, and in order to ensure the predetermined fireproof performance, the thickness dimension of the fireproof coating material is increased, and the overall size of the member is increased. There are also inconveniences.

  The objective of this invention is providing the structure and building which can improve the fireproof performance of a structural member cheaply, and can suppress the expansion of a member dimension.

The structure of the present invention includes a structural member having a predetermined cross-sectional area and a cross-sectional shape, and a first metal plate provided so as to cover at least a part of the outer surface of the structural member. The infrared reflectance of the outer surface is set to 0.4 or more.
According to the present invention, by increasing the infrared reflectance of the first metal plate covering the outer surface of the structural member to 0.4 or more, the radiant heat of the fire can be reflected by the first metal plate. The temperature rise of the structural member can be delayed, and the fire resistance performance of the structural member can be enhanced. In addition, the conventional fireproof covering material can be omitted or the thickness dimension thereof can be reduced, the expansion of the overall dimension of the structural member can be suppressed, and the effective use of the indoor space and the like can be achieved. Can do.

At this time, in the structure of the present invention, it is preferable that the outer surface of the first metal plate is plated, polished, or attached with a metal foil.
According to such a configuration, the infrared reflectance can be easily increased by plating the outer surface of the first metal plate, performing a polishing process, or attaching a metal foil. By reflecting radiant heat, the temperature rise of itself can be delayed, and as a result, the temperature rise of the structural member can be delayed.

Furthermore, in the structure of the present invention, it is preferable that the first metal plate has a thickness of 0.06 mm or more and 0.4 mm or less.
According to such a configuration, workability is ensured by setting the thickness of the first metal plate to 0.06 mm or more, and cost increase due to weight increase can be suppressed by making the thickness of 0.4 mm or less. The cost can be reduced and the fire resistance of the structural member can be improved.

In the structure of the present invention, a finishing material that covers the outer surface side of the first metal plate is provided on the outer side of the structural member, and at least one of the inner and outer surfaces of the finishing material has an outer surface. It is preferable that a second metal plate having an infrared reflectance of 0.4 or more is provided.
According to such a configuration, by providing the second metal plate on at least one of the inner and outer surfaces of the finishing material, even if the finishing material dries and shrinks and cracks occur, the second metal plate provides flame shielding. It is possible to prevent the structural member from being directly blown by a flame. Furthermore, by increasing the infrared reflectance of the surface of the second metal plate to 0.4 or more, the radiant heat of the flame can be reflected to further delay the temperature rise of the structural member.

At this time, in the structure of the present invention, it is preferable that the outer surface of the second metal plate is plated, polished, or attached with a metal foil.
According to such a configuration, it is possible to easily increase the infrared reflectance by plating the outer surface of the second metal plate, performing a polishing process, or attaching a metal foil. By reflecting the radiant heat, the temperature rise of itself can be delayed, and as a result, the temperature rise of the structural member can be more reliably delayed.

Furthermore, in the structure of the present invention, it is preferable that the second metal plate has a thickness of 0.06 mm or more and 0.4 mm or less.
According to such a configuration, workability can be ensured by setting the thickness of the second metal plate to 0.06 mm or more, and cost increase due to weight increase can be suppressed by making it 0.4 mm or less. The cost can be reduced and the fire resistance of the structural member can be improved.

In the structure of the present invention, a heat insulating material is provided between the outer surface of the structural member and the first metal plate and at least one of the outer surfaces of the first metal plate. Is preferred.
According to such a configuration, by providing the heat insulating material on the outer surface side of the structural member or the outer surface side of the first metal plate, the heat insulating performance of the heat insulating material and the flame shielding performance of the first metal plate are exhibited, and the structure The temperature rise of the member can be further delayed.

In the structure of the present invention described above, the structural member is a column member, a beam member or a reinforcing member each formed in a long bar shape, and the column member, the beam member or the reinforcing member is made of reinforced concrete, metal May be made of a metal, a composite structure of metal and concrete, or may be made of wood, and the structural member is a wall material, a floor material or a roof material each formed in a flat plate shape, and the wall material, the floor material Alternatively, the roofing material may be made of reinforced concrete, metal, a composite structure of metal and concrete, or wooden.
According to such a configuration, the outer surface of the long bar-shaped member such as a column member, a beam member, or a brace member is surrounded by the first metal plate, or a wall member, a floor member, a roof member, or the like is used. By covering the indoor side surface of the flat plate member with the first metal plate, the temperature rise of these various structural members can be reliably delayed.

On the other hand, the building of the present invention is characterized in that the main structure is constituted by any one of the structures.
According to such a building, the fireproof performance of the building can be improved because the main structure is constituted by the structural member having improved fireproof performance as described above. Furthermore, the conventional fireproof covering material can be omitted or the thickness dimension thereof can be reduced, and the expansion of the overall dimension of the structural member can be suppressed, and the indoor space can be effectively used.

  As described above, according to the structure and the building of the present invention, it is possible to omit or reduce the expensive fireproof coating material, and to improve the fireproof performance of the structural member relatively inexpensively. Furthermore, since the fireproof covering material can be omitted or made thinner, the overall dimensions of the structural member can be suppressed and the indoor space can be effectively used.

It is sectional drawing which shows the structure of 1st Embodiment of this invention. It is sectional drawing which shows the structure of 2nd Embodiment of this invention. It is sectional drawing which shows the structure of 3rd Embodiment of this invention. It is sectional drawing which shows the structure of 4th Embodiment of this invention. It is sectional drawing which shows the structure of 5th Embodiment of this invention. It is sectional drawing which shows the structure of 6th Embodiment of this invention. It is sectional drawing which shows the structure of 7th Embodiment of this invention. It is sectional drawing which shows the structure of 8th Embodiment of this invention. It is sectional drawing which shows the structure of 9th Embodiment of this invention. It is sectional drawing which shows the structure of 10th Embodiment of this invention. It is sectional drawing which shows the structure of 11th Embodiment of this invention. It is sectional drawing which shows the structure of 12th Embodiment of this invention. It is a graph of the fireproof performance test result which concerns on the Example of this invention.

Hereinafter, each embodiment of the present invention will be described with reference to the drawings.
In the second and subsequent embodiments, the same constituent members as those described in the first embodiment and the constituent members having the same functions are denoted by the same reference numerals as those in the first embodiment. Those descriptions are omitted or simplified.

[First Embodiment]
As a structure of the first embodiment of the present invention, a pillar structure of a building will be described with reference to FIG.
The column structure of the present embodiment includes a column 1 as a structural member made of a square steel pipe, and a column metal plate 2 as a first metal plate provided to cover the outer surface of the four circumferences of the column 1. Yes.
The pillar metal plate 2 is attached to the outer surface of the pillar 1 via an appropriate attachment member, and a gap space S with a predetermined interval is formed between the pillar 1 and the pillar metal plate 2. The column metal plate 2 also functions as a finishing material for the column 1 so that the appearance of the column 1 can be improved. The column metal plate 2 may be provided in close contact with the outer surface of the column 1.

  Moreover, the infrared reflectance of the outer surface of the metal plate 2 for pillars is set to 0.4 or more (1.0 or less). When the infrared reflectance is increased to 0.4 or more, in the event of a fire that occurs in the vicinity of a pillar, the infrared and radiant heat of the fire is reflected by the pillar metal plate 2 and the temperature rise of the pillar 1 is delayed. it can. Conversely, when the infrared reflectance is less than 0.4, the reflection performance is hardly exhibited. In addition, as a more desirable value of the infrared reflectance of the metal plate 2 for pillars, it will be 0.8 or more and 1.0 or less. Here, an outer surface having an infrared reflectance of 0.8 or more can be easily secured practically by surface treatment such as metal plating or polishing, and 1.0 is the theoretical upper limit.

Although it does not specifically limit as a process which raises the infrared reflectance of the outer surface of the metal plate 2 for pillars, The following surface treatments are applicable.
First, a plating treatment for applying metal plating such as zinc plating, tin plating, nickel plating, or the like to the outer surface of the metal plate 2 for pillars is applicable. Further, the outer surface of the pillar metal plate 2 may be polished, or the outer surface of the pillar metal plate 2 may be subjected to a surface treatment for attaching a metal foil such as stainless steel or aluminum having a high infrared reflectance. . By performing such various surface treatments, the infrared reflectivity of the columnar metal plate 2 can be increased from about 0.8 to about 0.95, thereby reflecting infrared rays and radiant heat in the event of a fire, thereby improving the columnar metal. The temperature rise of the plate 2 itself and the pillar 1 can be delayed.

  Moreover, the metal plate 2 for pillars attached to the outer surface side of the pillar 1 is formed with a plate thickness of 0.06 mm or more and 0.4 mm or less. Thus, by making the thickness of the metal plate for pillars 2 to be 0.06 mm or more, the handleability of the metal plate for pillars 2 is improved compared to the case where the thickness is less than this, and workability can be ensured. By setting it to 0.4 mm or less, an increase in cost due to an increase in weight can be suppressed. In other words, when the thickness of the columnar metal plate 2 is less than 0.06 mm, the rigidity is lowered, not only the handling property is lowered, but also the manufacturing cost is increased. A more desirable value for the thickness of the columnar metal plate 2 is 0.15 mm or more and 0.4 mm or less. Here, a metal plate having a plate thickness of 0.15 mm or more can be easily obtained in the market.

[Second Embodiment]
FIG. 2 shows a column structure as a structure according to the second embodiment of the present invention. The column structure of the present embodiment is different from the first embodiment shown in FIG. 1 in that a gap space S between the column 1 and the column metal plate 2 is formed wider. The material 2 and the infrared reflectance of the outer surface of the columnar metal plate 2 are the same as those in the first embodiment.
According to the column structure of the present embodiment, the gap space S between the column 1 and the column metal plate 2 is widened. Therefore, even if the temperature of the column metal plate 2 rises in the event of a fire, the heat insulation effect of the gap space S Therefore, the heat transfer to the pillar 1 can be suppressed, and the temperature rise of the pillar 1 can be further delayed.

[Third Embodiment]
FIG. 3 shows a column structure as a structure according to the third embodiment of the present invention. The column structure of the present embodiment is different from the first and second embodiments in that it has a finishing material 3, the material of the column 1 and the column metal plate 2, and the outer surface of the column metal plate 2. The infrared reflectance and the like are the same as those in the above embodiments. In the present embodiment, the pillar metal plate 2 is provided in close contact with the outer surface of the pillar 1.
In the column structure of the present embodiment, a finishing material 3 made of gypsum board or the like is provided so as to cover the outer surface side of the column 1. The finishing material 3 is fixed to the outer surface of the column metal plate 2 via a base material 4 made of a lightweight steel frame or the like. By covering the pillar 1 and the pillar metal plate 2 with such a finishing material 3 without gaps, the heat from the fire can be shut off by the finishing material 3 and the temperature rise of the pillar 1 and the pillar metal plate 2 is delayed. Thus, it is possible to prevent the pillar 1 and the pillar metal plate 2 from being directly heated by the flame until the finishing material 3 is cracked or dried and shrinks to form a gap. In addition, the radiant heat from the finishing material 3 is reflected by the metal plate 2 for the pillar, and even if the finishing material 3 collapses, the radiant heat of the fire is reflected by the metal plate 2 for the pillar, thereby delaying the temperature rise of the pillar 1 Can be made.

[Fourth Embodiment]
FIG. 4 shows a column structure as a structure according to the fourth embodiment of the present invention. The column structure of the present embodiment is different from the third embodiment in that a finishing material metal plate 5 as a second metal plate is provided on the inner surface side of the finishing material 3. And the structure of the metal plate 2 for pillars is the same as that of each said embodiment.
The finishing material metal plate 5 is fixed to the inner surface of the finishing material 3 with a screw or the like (not shown), and the finishing material 3 side surface of the finishing material metal plate 5 is the same as the outer surface of the column metal plate 2. The infrared reflectance is set to 0.4 or more (1.0 or less) by the treatment, and the plate thickness is formed to 0.06 mm or more and 0.4 mm or less. By providing such a metal plate 5 for a finishing material, infrared rays and radiant heat of a fire can be reflected by the metal plate 5 for a finishing material, and the temperature rise of the column 1 and the metal plate 2 for a column can be delayed. Furthermore, even if the finishing material 3 is dried and contracted to cause cracks, the finishing material metal plate 5 exhibits flame shielding properties, preventing the pillar 1 and the pillar metal plate 2 from being directly struck by a flame. The temperature rise of 1 can be delayed.

[Fifth Embodiment]
FIG. 5 shows a column structure as a structure according to the fifth embodiment of the present invention. The column structure of the present embodiment is different from the fourth embodiment in that the finishing material metal plate 5 as the second metal plate is provided on the outer surface side of the finishing material 3, and the other configuration. Is the same as in the above embodiments.
In the column structure of the present embodiment, by attaching the finishing material metal plate 5 to the outer surface side of the finishing material 3, the infrared rays and radiant heat of the fire are reflected by the finishing material metal plate 5, and the finishing material 3, the pillar 1 and The temperature rise of the columnar metal plate 2 can be delayed. Moreover, even if the finishing material 3 is dried and contracted to cause cracks, the finishing material metal plate 5 exhibits flame shielding properties, and the column 1 and the column metal plate 2 can be prevented from being directly blown by flame. Moreover, when the finishing material 3 is a wooden etc., it can reinforce with the metal plate 5 for finishing materials, and the fall of the finishing material 3 can be prevented.
In the fourth embodiment, a finishing material metal plate 5 is provided on the inner surface side of the finishing material 3 as a second metal plate. In the fifth embodiment, finishing is performed on the outer surface side of the finishing material 3 as a second metal plate. Although the metal plate 5 for the material is provided, the second metal plate may be provided on both the inner and outer surfaces of the finishing material 3, and thus the second metal plate is provided on both the inner and outer surfaces of the finishing material 3, thereby further improving the fire resistance performance. Can be improved.

[Sixth Embodiment]
FIG. 6 shows a column structure as a structure according to a sixth embodiment of the present invention. The column structure of the present embodiment is different from the fourth embodiment in that a heat insulating material 6 is provided between the column 1 and the column metal plate 2, and the other configurations are the same as in the above embodiments. It is the same as the form.
The heat insulating material 6 is attached so as to cover the outer surface side of the pillar 1, and the pillar metal plate 2 is attached to the outer surface of the heat insulating material 6. The heat insulating material 6 may be one that is attached to the outer surface of the column 1 by spraying using its viscosity, or a molded dry heat insulating plate or the like is fixed to the outer surface of the column 1 with screws or stud bolts and fixing brackets. It may be fixed by a tool. Thus, by providing the heat insulating material 6 between the pillar 1 and the metal plate 2 for a pillar, the heat insulation performance of the heat insulating material 6 and the flame shielding performance of the metal plate 2 for a pillar are demonstrated, and the temperature of the pillar 1 at the time of a fire The rise can be delayed.

  Furthermore, as the heat insulating material 6, those having fire resistance in addition to heat insulation and those having self-extinguishing properties at a high temperature of 300 ° C. or higher are preferable. As such a heat-insulating material having a self-extinguishing property, a rock wool board is preferable because it is inexpensive, but other than the rock wool board, for example, a ceramic board or the like may be used. Self-extinguishing is the property of burning while exposed to a flame but extinguishing when separated from the flame. For example, in the method A defined in JIS K 6911, after removing the flame, the test piece can be burnt within 180 seconds, and the burned length can be 25 mm or more and 100 mm or less.

[Seventh Embodiment]
FIG. 7 shows a column structure as a structure according to a seventh embodiment of the present invention. The column structure of the present embodiment is different from the sixth embodiment in that the column 1 is made of reinforced concrete, and other configurations are the same as those of the above embodiments.
In the column structure of the present embodiment, a column metal plate 2 is provided on the outer surface side of a column 1 made of reinforced concrete via a heat insulating material 6.

[Eighth Embodiment]
FIG. 8 shows a column structure as a structure according to an eighth embodiment of the present invention. The column structure of the present embodiment is different from the sixth embodiment in that the column 1 is made of wood, and the other configurations are the same as those of the respective embodiments.
In the column structure of the present embodiment, a column metal plate 2 is provided on the outer surface side of a wooden column 1 via a heat insulating material 6.

[Ninth Embodiment]
FIG. 9 shows a column structure as a structure according to the ninth embodiment of the present invention. The column structure of the present embodiment is different from that of the fourth embodiment in that the finishing material 3 is fixed by an adhesive 7, and the other configurations are the same as those of the respective embodiments.
In the column structure of this embodiment, the adhesive 7 is interposed between the column metal plate 2 on the outer surface of the column 1 and the metal plate 5 on the inner surface of the finishing material 3, and the column 7 is used by the adhesive 7. The metal plate 2 and the finishing metal plate 5 are fixed. The adhesive 7 is provided on the four surfaces of the pillar 1 so that two rows (total of eight rows) extend in the longitudinal direction of the pillar 1. The adhesive 7 is not particularly limited as long as it can adhere the metal plate 2 for pillars and the metal plate 5 for finishing materials. Also, the bonding location is not particularly limited as long as the finishing material 3 can be fixed to the pillar 1.

[Tenth embodiment]
FIG. 10 shows a column structure as a structure according to the tenth embodiment of the present invention. The column structure of the present embodiment is different from the fourth embodiment in that the column 1 is made of H-section steel, and the other configurations are the same as those of the above embodiments.
In the column structure of the present embodiment, the column 1 is an H-shaped steel having a pair of flanges 1A and a web 1B extending over the flanges 1A, and the column metal plate 2 is along the outer surface of each flange 1A. At the same time, the end portions of the flanges 1 </ b> A are connected to each other and extend in parallel with the web 1 </ b> B, and are provided in a rectangular shape surrounding the pillar 1.

[Eleventh embodiment]
FIG. 11 shows a column structure as a structure according to an eleventh embodiment of the present invention. The column structure of the present embodiment is different from that of the tenth embodiment in that the finishing material 3 is supported by the square studs 8, and other configurations are the same as those of the respective embodiments.
In the column structure of the present embodiment, corner studs 8 are provided between the column metal plate 2 and the finish metal plate 5 at positions corresponding to the end portions of the flanges 1A of the column 1, and a total of four corner studs 8 are provided. The finishing material 3 is supported by.

[Twelfth embodiment]
FIG. 12 shows a column structure as a structure according to a twelfth embodiment of the present invention. The column structure of the present embodiment is different from the eleventh embodiment in that the column metal plate 2 is provided along the entire peripheral surface of the column 1, and other configurations are the same as those of the embodiments described above. It is the same.
In the column structure of the present embodiment, the column metal plate 2 is provided along each surface of the pair of flanges 1A and the web 1B of the column 1 made of H-shaped steel.

Hereinafter, as an example of the present invention, a result of a heating test using the column structure will be described with reference to FIG.
As a test body, as shown in FIG. 6, a column metal plate 2 is provided on the outer surface of the column 1 via a heat insulating material 6, and a column metal plate 2 is simply provided outside the column 1 and the outside thereof. A comparison test on the column inner surface temperature (that is, the column back surface temperature) against a fire was carried out against the one provided with the heat insulating material 6, that is, the one not provided with the column metal plate 2 outside the heat insulating material 6 (comparative example). .
In the case of the sixth embodiment and the comparative example, both are made of a rock wool plate as the heat insulating material, the plate thickness is 40 mm, and the plate metal plate 2 is a thin plate thickness of 0.11 mm. A steel plate having an infrared reflectance of 0.86 was used by galvanizing the outer surface of the steel plate. As the finishing material 3, a rock wool sound absorbing plate was used.
Heating is performed continuously from the outside of the finishing material 3 in accordance with a standard heating curve (fire reaching 945 ° C. in 1 hour as defined by the Building Standards Act (ISO834)), and the column 1 is not damaged or shielded. The time when the thermal properties were impaired was measured. The test results are shown in the graph of FIG.
As shown by the solid line in FIG. 13, when the column metal plate 2 is installed outside the heat insulating material 6, the temperature rise time can be delayed by about 40% compared to the comparative example shown by the broken line. .

In addition, this invention is not limited to the said embodiment, Including other structures etc. which can achieve the objective of this invention, the deformation | transformation etc. which are shown below are also contained in this invention.
For example, in the above-described embodiment, the pillar 1 of the building has been illustrated and described. However, the structure of the present invention is not limited to the pillar 1, and may be a long bar-like member such as a beam member or a brace member. Moreover, it may be a flat plate shape such as a wall material, a floor material, or a roof material. Moreover, as a use of a structure, you may utilize for vehicles, such as not only a building but another structure and a ship.

Moreover, in the said embodiment, as the metal plate 2 for pillars and the metal plate 5 for finishing materials, metal plates of arbitrary materials, such as a steel plate, a stainless steel plate, an aluminum alloy plate, can be utilized.
Moreover, in the said embodiment, by making the finishing material 3 into a metal plate, the finishing material 3 can also serve as the finishing material metal plate 5, and the finishing material metal plate 5 can be omitted. For example, in FIGS. 3 to 12, the finishing material 3 is a finishing material 3 made of a metal plate, and the outer surface of the finishing material 3 made of a metal plate is subjected to plating treatment or polishing treatment, and the infrared reflectance thereof. If it is raised to 0.4 or more, the metal plate 5 for finishing material can be omitted. Further, a thin metal plate such as a stainless steel plate (or foil) or a film may be attached to the surface of the finishing material 3 without performing processing for increasing the infrared reflectance of the finishing material 3. Thus, it is cheaper and more economical to use the finishing material 3 and the finishing material metal plate 5 attached thereto.

  DESCRIPTION OF SYMBOLS 1 ... Column (structural member), 2 ... Metal plate for columns (1st metal plate), 3 ... Finishing material, 4 ... Base material, 5 ... Metal plate for finishing material (2nd metal plate), 6 ... Heat insulation material.

Claims (10)

A structural member having a predetermined cross-sectional area and cross-sectional shape;
A first metal plate provided to cover at least a part of the outer surface of the structural member,
The first metal plate has a structure in which an infrared reflectance of an outer surface thereof is set to 0.4 or more. The structure of claim 1,
A structure, wherein an outer surface of the first metal plate is plated, polished, or attached with a metal foil. The structure according to claim 1 or 2,
The first metal plate has a thickness of 0.06 mm or more and 0.4 mm or less. In the structure according to any one of claims 1 to 3,
On the outside of the structural member, a finishing material that covers the outer surface side of the first metal plate is provided,
2. A structure according to claim 1, wherein a second metal plate having an infrared reflectance of 0.4 or more is provided on at least one of the inner and outer surfaces of the finishing material. The structure according to claim 4,
A structure having a plating finish, a polishing treatment, or a metal foil attached to an outer surface of the second metal plate. The structure according to claim 4 or 5,
The second metal plate has a thickness of 0.06 mm or more and 0.4 mm or less. The structure according to any one of claims 1 to 6,
A structural body characterized in that a heat insulating material is provided between the outer surface of the structural member and the first metal plate and at least one of the outer surfaces of the first metal plate. The structure according to any one of claims 1 to 7,
The structural member is a column material, a beam material or a reinforcement material each formed in a long bar shape, and the column material, the beam material or the reinforcement material is made of reinforced concrete, metal, a composite structure of metal and concrete. A structure characterized by being made of wood or wood. The structure according to any one of claims 1 to 7,
The structural member is a wall material, floor material or roof material each formed in a flat plate shape, and the wall material, floor material or roof material is made of reinforced concrete, metal, a composite structure of metal and concrete, or A structure characterized by being made of wood.   A main structure is constituted by the structure according to any one of claims 1 to 9.

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