JP2018012953A - How to install equipment - Google Patents

Abstract

[PROBLEMS] To improve the size of equipment.
An installation method of equipment material for installing equipment material in a through hole of a structural member to which a fireproof coating is applied, wherein the fireproof coating is applied to the structural member by spraying from one side in the penetration direction of the through hole. One fireproof coating construction process, a removal process for removing the fireproof coating formed on the small surface of the through hole by the first fireproof coating construction process, and a second that sprays the fireproof coating on the structural member from the other side in the penetration direction It has a fireproof coating construction process and an equipment material installation process for installing the equipment material through the through hole.
[Selection] Figure 7

Description

  The present invention relates to an installation method for equipment.

  In a structural member (for example, a steel beam) constituting a structure such as a building, there may be a case where a through-hole for inserting an equipment material (air conditioning or ventilation pipe or the like) is provided. In addition, for such structural members, in order to protect against temperature rise (high temperature) due to fire, etc., it is legally obliged to install fireproof covering materials such as spray rock wool over the specified thickness. Yes.

JP 2007-198029 A

  When fireproof coating is applied to structural members with through-holes, if the fireproof coating with the same thickness as other parts is formed on the small surface of the through-hole, the effective diameter of the through-hole is reduced and penetration is possible. The diameter of the equipment material is limited. On the other hand, when the diameter of the through-hole is increased, the structural performance is greatly deteriorated due to the cross-sectional defect, and measures such as providing a reinforcing material are required.

  This invention is made | formed in view of this subject, The place made into the objective enlarges the effective diameter of a through-hole, without enlarging a through-hole, and the magnitude | size of the equipment material installed in a through-hole It is to improve.

In order to achieve such an object, the installation method of the equipment material according to the present invention is an installation method of the equipment material in which the equipment material is installed in the through hole of the structural member to which the fireproof coating is applied, in the through direction of the through hole. A first refractory coating construction step for spraying the refractory coating on the structural member from one side; and a removal step for removing the refractory coating formed on the small edge surface of the through-hole by the first fireproof coating construction step. And a second fireproof coating construction process for spraying the fireproof coating on the structural member from the other side in the penetration direction, and a facility material installation process for installing the equipment material through the through hole. It is characterized by.
According to such an installation method of the equipment material, the fireproof coating on the small opening surface of the through hole can be formed thin (in other words, the effective diameter of the through hole can be increased), and the size of the equipment material can be improved.

In this installation method of the equipment material, before the equipment material installation step, the fireproof coating on the small surface of the through hole is set to a first coating thickness, and the fireproof coating other than the small surface of the through hole is formed on the first surface. It is desirable to have a refractory coating management process that manages as a second coating thickness that is greater than one coating thickness.
According to the installation method of such an equipment material, the fireproof coating thicknesses of portions other than the facet surface and the facet surface can be respectively confirmed.

In order to achieve the above object, the installation method of the equipment material of the present invention is an installation method of the equipment material for installing the equipment material in the through hole of the structural member to which the fireproof coating is applied, A first fireproof coating construction step for spraying the fireproof coating on the structural member from one side of the direction, and a second fireproof coating construction step for spraying the fireproof coating on the structural member from the other side of the penetration direction And an equipment material installation process for installing the equipment material through the through-hole, and spraying on the small surface of the through-hole by the first fireproof coating construction process and the second fireproof coating construction process The thickness of the refractory coating is a first coating thickness, and the thickness of the refractory coating sprayed to a portion other than the facet of the through hole is a second coating thickness that is thicker than the first coating thickness. To do.
According to such an installation method of equipment material, the fireproof coating on the small-mouth surface of the through hole can be easily formed thin, and the size of the equipment material can be improved.

In this installation method of equipment, the first coating thickness is the fireproof coating thickness of the structural member whose fireproof performance has been confirmed by experiment, and the second coating thickness is the structural member defined by law. The thickness of the fireproof coating may be.
According to such an installation method for equipment, the first coating thickness can be set small while ensuring fire resistance.

In this installation method of the equipment material, it is preferable that the through hole is circular, and the first coating thickness is managed at a location of three or more divisions of the circumference of the through hole.
According to such an installation method for equipment, the first coating thickness can be managed with high accuracy.

In this installation method of equipment, the first covering thickness is managed by using a checking tool that penetrates into the fireproof coating to check the thickness, and the checking tool is left in the fireproof coating. It is desirable to execute the equipment material installation step.
According to the installation method of such an equipment material, it can be confirmed that a predetermined coating thickness is easily ensured visually even after the completion of construction.

It is desirable that the installation method of the equipment material includes a shaping step of pressing and shaping the fireproof coating formed on the small surface of the through hole after the second fireproof coating construction step.
According to such an installation method of equipment materials, the shape of the fireproof coating on the small edge surface can be improved.

  According to the present invention, it is possible to improve the size of the equipment material.

It is a front view which shows the structure of the steel beam 10 used for this embodiment. It is AA sectional drawing of FIG. It is a schematic flowchart of the construction method of a steel beam and equipment material. It is a flowchart which shows the fireproof coating formation and the installation method of an equipment material in a comparative example. FIG. 5A to FIG. 5E are process cross-sectional views of the fireproof coating formation and the installation method of equipment materials in a comparative example. It is a flowchart which shows the fireproof coating formation in this embodiment, and the installation method of an equipment material. FIG. 7A to FIG. 7E are process cross-sectional views of the fireproof coating formation and the installation method of equipment material in the present embodiment.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  In the following embodiments, an example in which the installation method for equipment according to the present invention is applied to a steel beam (corresponding to a structural member) of a steel structure building will be described.

=== Embodiment ===
<< About the structure of steel beams >>
FIG. 1 is a front view showing a configuration of a steel beam 10 used in the present embodiment. FIG. 2 is a cross-sectional view taken along the line AA of FIG. In the following description, when the steel beam 10 is viewed from the front as shown in FIG. 1, the vertical direction is the vertical direction (vertical direction), the horizontal direction is the longitudinal direction, and in FIG. The direction that becomes the width direction of the flange is simply shown as the width direction.

  As shown in FIGS. 1 and 2, the steel beam 10 of the present embodiment is provided below the slab 20, and has a plate-like upper flange 12 and a lower flange 14 that are spaced apart from each other and face each other, This is an H-shaped steel in which a plate-like web 16 that connects the upper flange 12 and the lower flange 14 up and down at the center in the width direction is integrated. In order to insert equipment materials such as air conditioning or ventilation ducts and piping sleeve pipes, the web 16 penetrates in the width direction, that is, from the surface 16a on one side of the web 16 to the surface 16b on the other side. A hole 18 is provided. That is, the width direction (the thickness direction of the web 16) in the steel beam 10 corresponds to the penetration direction of the through hole 18. As shown in the figure, the height of the steel beam 10 (the so-called beam) is H, and the diameter of the through hole 18 is h.

<< About fireproof coating >>
In the steel beam 10 as described above, in order to improve the fire resistance, the building standard law stipulates that the surface is covered with a fireproof covering material (for example, spray rock wool) to a specified thickness. For example, in the case of spray rock wool (hereinafter simply referred to as rock wool), it is prescribed that the cover is 25 mm for 1 hour fire resistance, 45 mm for 2 hour fire resistance, and 60 mm for 3 hour fire resistance. ing.

  However, if the fireproof coating having the above-described thickness is provided also on the small face 18a of the through hole 18, the effective diameter of the through hole 18 becomes small. When the diameter of the through-hole 18 is increased, the structural performance is greatly deteriorated due to the cross-sectional defect, and measures such as providing a reinforcing material are required.

  Therefore, in the present embodiment, the coating thickness (corresponding to the first coating thickness) of the fireproof coating on the small face 18a of the through hole 18 is set to be larger than the coating thickness (corresponding to the second coating thickness) of the fireproof coating other than the small face 18a. It is designed to be thin. Thereby, the effective diameter of the through-hole 18 is expanded without increasing the diameter of the through-hole 18, and the size of the equipment material (equipment piping 40 described later) installed in the through-hole 18 is improved.

<< About construction method >>
FIG. 3 is a schematic flow diagram of a method for constructing steel beams and equipment materials.

  First, the steel beam 10 having the through hole 18 as shown in FIGS. 1 and 2 is manufactured at a factory (S10). Then, the manufactured steel beam 10 is transported to the construction site (S20), and the steel beam 10 is built together with a pillar or the like at the construction site (S30). Then, the slab 20 is provided on the steel beam 10 like FIG. 1, FIG.

  Thereafter, a fireproof coating material (fireproof coating 30 to be described later) such as rock wool is formed on the surface of the steel beam 10, and equipment material (equipment piping 40 to be described later) is installed in the through hole 18 (S40).

<Fireproof coating formation and installation of equipment>
(Comparative example)
FIG. 4 is a flowchart showing a fireproof coating formation and installation method of equipment material in a comparative example, and FIGS. 5A to 5E are process cross-sectional views of the fireproof coating formation and equipment material installation method in a comparative example. 5A to 5E, the left side is a cross-sectional view along the width direction, and the right side is a cross-sectional view along the longitudinal direction (a cross section at the center position in the width direction of the steel beam 10).

  First, fireproof coating 30 (rock wool) is sprayed from one side in the width direction (the surface 16a side of the web 16) to the steel beam 10 provided as shown in FIG. 5A (FIG. 4: S401). Thereby, as shown in FIG. 5B, the fireproof coating 30 is formed on the surface 16a side (one side in the width direction) of the steel beam 10. Here, the fireproof coating 30 is formed with a coating thickness of 25 mm that is fireproof for 1 hour.

  Next, the fireproof coating 30 is sprayed onto the steel beam 10 from the other side in the width direction (the surface 16b side of the web 16) (FIG. 4: S402). Thereby, as shown in FIG. 5C, the fireproof coating 30 is also formed on the surface 16 b side (the other side in the width direction) of the steel beam 10. The fireproof coating 30 having a thickness equivalent to that of the other portions is formed on the small facet 18a of the through hole 18 by steps S401 and S402. In addition, the fireproof coating 30 is sprayed perpendicularly to the small face 18a of the through hole 18 as necessary.

  After the fire-resistant coating 30 is applied to the steel beam 10 in this manner, the fire-resistant coating 30 on the general portion (web 16, upper flange 12, lower flange 14) and the small end surface 18a of the through hole 18 is applied as necessary. The heel is pressed and shaped (FIG. 4: S403).

Thereafter, as shown in FIG. 5D, the opening diameter (effective diameter: hereinafter referred to as D) of the through-hole 18 after the formation of the fireproof coating 30 is measured and confirmed (FIG. 4: S404). Thereby, the coating thickness of the fireproof coating 30 on the facet 18a can be calculated. That is, since the diameter of the through hole 18 before the formation of the fireproof coating 30 is h (see FIGS. 1 and 2), if the coating thickness of the fireproof coating 30 on the facet 18a is d,
d = (h−D) / 2 (Equation 1)
It becomes. Then, it is confirmed that the calculated coating thickness d is a specified thickness (for example, 25 mm) or more.

  Finally, as shown in FIG. 5E, the equipment pipe 40 'is inserted into the through hole 18 to install the equipment pipe 40' (S405).

  In the case of this comparative example, the fireproof coating 30 having substantially the same thickness as other parts is also formed on the small face 18a of the through hole 18. As a result, the effective diameter of the through hole 18 is reduced, and the size (diameter) of the equipment pipe 40 'is also reduced.

  Further, the calculation of the coating thickness of the fireproof coating 30 in the comparative example (Equation 1) is based on the premise that the fireproof coating 30 is applied to the small face 18a of the through hole 18 with a uniform thickness. For this reason, for example, when the center position of the through-hole 18 and the center position of the opening after the formation of the fireproof coating 30 are shifted, even if the coating thickness d is equal to or greater than the specified thickness from the result of Equation 1, There may be a portion thinner than the thickness. Therefore, there is a possibility that the coating thickness cannot be reliably managed.

(This embodiment)
FIG. 6 is a flowchart showing a fireproof coating formation and installation method of equipment material in the present embodiment, and FIGS. 7A to 7E are process cross-sectional views of the fireproof coating formation and equipment material installation method in the present embodiment. . 7A to 7E, the left side is a cross-sectional view along the width direction, and the right side is a cross-sectional view along the longitudinal direction (a cross section of the central portion of the steel beam 10 in the width direction).

  First, fireproof coating 30 (rock wool) is sprayed from one side in the width direction (penetration direction) (surface 16a side of the web 16) to the steel beam 10 provided as shown in FIG. 7A (FIG. 6: S41). ). Thereby, as shown in FIG. 7B, the fireproof coating 30 is formed on the surface 16a side (one side in the width direction) of the steel beam 10.

  Here, as shown in FIG. 7C, the fireproof coating 30 attached to the small face 18a of the through hole 18 in step S41 is removed by the operator's hand (FIG. 6: S42). The removal of the fireproof coating 30 is not limited to the operator's hand, and may be performed using a tool or the like.

  Next, the fireproof coating 30 is sprayed onto the steel beam 10 from the other side in the width direction (penetration direction) (the surface 16b side of the web 16) (FIG. 6: S43). As a result, as shown in FIG. 7D, the fireproof coating 30 is also formed on the surface 16b side (the other side in the width direction) of the steel beam 10. In step S42, since the fireproof coating 30 on the small face 18a of the through hole 18 is removed, the coating thickness of the fireproof coating 30 on the small face 18a after step S43 is the small face 18a after step S402 of the comparative example. It becomes smaller (thinner) than the coating thickness of the fireproof coating 30. That is, the coating thickness of the fireproof coating 30 on the small-mouthed surface 18a of the through hole 18 is formed thinner than the coating thickness of the portion other than the small-sized surface 18a. However, the coating thickness of the fireproof coating 30 on the small-mouthed surface 18a is not less than a thickness (for example, 10 mm) that is confirmed to be able to ensure fireproof performance by a fireproof experiment. Thereby, coating thickness can be set small, ensuring fireproof performance.

  After the formation of the fireproof coating 30, the fireproof coating 30 on the small face 18a of the through hole 18 is pressed and shaped (FIG. 6: S44). Thereby, the shape of the fireproof coating 30 on the small face can be improved. If necessary, the general part (web 16, upper flange 12, lower flange 14) is also pressed and shaped.

  Thereafter, a confirmation tool 32 for confirming the thickness is implanted in the fireproof coating 30 on the small face 18a of the through hole 18 (FIG. 6: S45). In this embodiment, as shown to FIG. 7E, the confirmation tool 32 is implanted in the location (three places) which divided the circumference of the through-hole 18 into three. In FIG. 7E, the confirmation tool 32 (black triangle) is an image of the state of implantation, and does not represent the configuration (shape) of the confirmation tool 32. The confirmation tool 32 has a penetration portion (for example, a pin-shaped portion) having a length (here, 10 mm) that has been confirmed to be able to ensure fire resistance performance by a fire resistance experiment. If the penetration part of this confirmation tool 32 is penetrated into the fireproof coating 30 of the small-mouthed surface 18a and the tip does not contact the small-mouthed surface 18a, it can be confirmed that the coating thickness of the fireproof coating 30 is larger than 10 mm. The position where the confirmation tool 32 is implanted is not limited to three, and may be two or four or more. Since the coating thickness can be accurately managed as the number of confirmation points increases (the number of points where the confirmation tool is implanted), it is desirable that the number is at least three. Thereby, the coating thickness can be managed more accurately than in the comparative example.

  Moreover, you may implant the confirmation tool (however, the length of a penetration part is 25 mm) similar to the confirmation tool 32 also in the general part (web 16, the upper flange 12, the lower flange 14). Thereby, the coating thickness of the fireproof coating 30 on the small edge surface 18a can be managed as 10 mm, the coating thickness of the fireproof coating 30 other than the small edge surface 18a can be managed as 25 mm, and the fireproof coating 30 on the portions other than the small edge surface 18a and the small edge surface 18a. The coating thickness of each can be confirmed.

  Finally, as shown in FIG. 7F, the facility piping 40 is installed by inserting (penetrating) the facility piping 40 into the through hole 18 (S46). Although the description of the confirmation tool 32 is omitted in FIG. 7F, the installation piping 40 is installed with the confirmation tool 32 left on the fireproof coating 30. Thus, by leaving the confirmation tool 32, it can be easily confirmed that a predetermined coating thickness (here, 10 mm) is ensured visually even after the completion of construction.

  As described above, in this embodiment, the fireproof coating 30 (rock wool) is sprayed from one side in the width direction (surface 16a side) to the steel beam 10 provided with the through holes 18 (step S41). The first fireproof coating process), the step S42 (removal process) for removing the fireproof coating 30 formed on the small face 18a of the through hole 18, and the fireproof coating 30 (rock wool from the other side in the width direction (surface 16b side)) ) And step S46 (equipment placement step) in which the equipment pipe 40 is disposed through the through hole 18.

  Thereby, the coating thickness of the fireproof coating 30 on the small face 18a of the through hole 18 can be made thinner than that of the comparative example, and the effective diameter of the through hole 18 can be enlarged as compared with the comparative example. Therefore, the size (diameter) of the equipment pipe 40 installed in the through hole 18 can be made larger than the size (diameter) of the equipment pipe 40 ′ of the comparative example.

=== About Other Embodiments ===
The above embodiment is for facilitating the understanding of the present invention, and is not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and it is needless to say that the present invention includes equivalents thereof. In particular, even the embodiments described below are included in the present invention <about steel beams>
In the above-described embodiment, the structural member is the steel beam 10. However, the present invention is not limited to this, and the structural member may be any structural member that has a surface that needs to be fireproofed and that has a through hole. For example, the present invention can be applied to other fireproof covering structural members using a metal material such as stainless steel or aluminum alloy. For example, it is applicable also to a pillar. In the above-described embodiment, the cross-sectional shape of the structural member (steel beam 10) is H-shaped, but is not limited thereto, and may be I-shaped or T-shaped.

<Fireproof coating material>
In the above-described embodiment, the fireproof coating 30 is sprayed rock wool. However, the present invention is not limited to this, and other fireproof coating materials such as ceramics and gypsum may be used.

<About construction method of fireproof coating material>
In the above-described embodiment, after the fireproof coating 30 is sprayed on one side (the surface 16b side) of the steel beam 10, the fireproof coating 30 attached to the small edge surface 18a of the through hole 18 is removed. Is not limited. For example, in step 402 of the comparative example (FIG. 4), when the coating thickness of the facet 18a is adjusted to be the same as that of other parts by spraying perpendicularly to the facet 18a, this You may make it abbreviate | omit spraying. That is, the amount (per unit covering area) of the refractory coating 30 sprayed on the small face 18a by the blasting of the refractory coating 30 twice from one side and the other side in the width direction of the steel beam 10 is each sprayed. Therefore, the amount of fireproof coating 30 sprayed on one side of the steel beam 10 (per unit covering area) may be reduced. In addition, in the above-mentioned two times of spraying, the fireproof coating 30 hits perpendicularly other than the facet 18a and hits the facet 18a obliquely, so the amount of the fireproof cover 30 sprayed on the facet 18a by itself is (other Less than part). By doing in this way, the coating thickness of the fireproof coating 30 of the small face 18a can be easily formed thinner than other parts (parts other than the small face 18a).

<About through holes>
In the above-described embodiment, the shape of the through hole 18 is circular, but is not limited thereto. For example, an ellipse may be sufficient and a polygon may be sufficient. In the above-described embodiment, the number of through holes 18 formed in the steel beam 10 is one. However, the number is not limited to this, and a plurality of through holes 18 may be formed.

DESCRIPTION OF SYMBOLS 10 Steel beam 12 Upper flange 14 Lower flange 16 Web 16a Surface 16b Surface 18 Through-hole 18a Small-mouthed surface 20 Slab 30 Fireproof coating (rock wool)
32 Checking tool 40 Equipment piping

Claims (7)

A facility material installation method for installing facility material in a through-hole of a structural member to which a fireproof coating is applied,
A first fireproof coating construction step of spraying and constructing the fireproof coating on the structural member from one side in the penetration direction of the through hole;
A removal step of removing the fireproof coating formed on the small surface of the through-hole by the first fireproof coating construction step;
A second fireproof coating construction step of spraying the fireproof coating on the structural member from the other side of the penetration direction;
An equipment material installation step of installing the equipment material through the through hole; and
The installation method of the equipment material characterized by having. It is the installation method of the equipment material of Claim 1, Comprising:
Before the equipment material installation step, the fireproof coating on the small surface of the through hole is the first coating thickness, and the fireproof coating other than the small surface of the through hole is a second coating thickness that is thicker than the first coating thickness. As a fireproof coating management process to manage as
The installation method of the equipment material characterized by this. A facility material installation method for installing facility material in a through-hole of a structural member to which a fireproof coating is applied,
A first fireproof coating construction step of spraying and constructing the fireproof coating on the structural member from one side in the penetration direction of the through hole;
A second fireproof coating construction step of spraying the fireproof coating on the structural member from the other side of the penetration direction;
An equipment material installation step of installing the equipment material through the through hole; and
Have
The thickness of the refractory coating sprayed on the small surface of the through hole in the first fireproof coating construction step and the second fireproof coating construction step is defined as the first coating thickness, and sprayed on other than the small surface of the through hole. The thickness of the fireproof coating is a second coating thickness greater than the first coating thickness,
The installation method of the equipment material characterized by this. It is the installation method of the equipment material of Claim 2 or 3,
The first coating thickness is the fireproof coating thickness of the structural member whose fireproof performance has been confirmed by experiments,
The second coating thickness is a fireproof coating thickness of the structural member defined by law,
The installation method of the equipment material characterized by this. It is the installation method of the equipment material in any one of Claim 2 thru | or 4, Comprising:
The through hole is circular,
Managing the first coating thickness at a location of three or more divisions of the circumference of the through-hole,
The installation method of the equipment material characterized by this. It is the installation method of the equipment material according to claim 5,
For the management of the first coating thickness, a confirmation tool is used to check the thickness by penetrating the fireproof coating,
In the state where the confirmation tool is left on the fireproof coating, the equipment material installation step is executed.
The installation method of the equipment material characterized by this. It is the installation method of the equipment material in any one of Claims 1 thru | or 6, Comprising:
After the second refractory coating construction step, it has a shaping step of holding down and shaping the refractory coating formed on the small surface of the through hole,
The installation method of the equipment material characterized by this.

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