JP-2026076019-A - Fire-resistant coating structure

Abstract

[Problem] To provide a fire-resistant coating structure that is less constrained by the order of construction. [Solution] The fire-resistant covering structure comprises a hole covering material 20 that covers the hole wall of a through hole 12H formed in the web 12 of the steel beam 10 and the web 12 on the outer circumference of the through hole 12H, an outer covering material 30 laminated on the hole covering material 20 on the axially outer side of the through hole 12H, and a box-shaped fire-resistant covering material (box-shaped covering material) 40 that surrounds the flange 14 and web 12 of the steel beam 10 and is positioned in contact with the outer covering material 30, with through holes formed in the hole covering material 20, the outer covering material 30 and the fire-resistant covering material, respectively, that communicate with each other. [Selection Diagram] Figure 1

Inventors

• 蛇石 貴宏
• 望月 久智
• 冨田 拓
• 青木 慧
• 齋藤 真美
• 花井 厚周
• 飯田 智裕
• 大橋 宏和
• 堀 正人
• 坂田 順二
• 坂上（久保木） 智絵

Assignees

• 株式会社竹中工務店
• 日本インシュレーション株式会社
• センクシア株式会社

Dates

Publication Date

20260511

Application Date

20241023

Claims (10)

1. A hole covering material that covers the hole wall of a through hole formed in the web of a steel beam and the outer circumference of the web of the through hole, An outer covering material laminated on the hole covering material on the axially outer side of the through hole, A box-shaped fire-resistant covering material is positioned surrounding the flange and web of the steel beam and in contact with the outer covering material, Equipped with, The hole covering material, the outer covering material, and the fire-resistant covering material each have through holes for inserting pipes that are in communication with each other. Fire-resistant coating structure.
2. The aforementioned hole covering material is An annular first hole covering material that covers the hole wall, A second hole covering material is positioned on the axial outer side of the through hole, in contact with the first hole covering material, and covers the web surface. It is equipped with The fire-resistant coating structure according to claim 1.
3. The aforementioned hole covering material is A third hole covering material covers the hole wall and protrudes from both sides of the web, A fourth hole covering material is laminated on the third hole covering material on the radially outer side of the through hole to cover the web surface, It is equipped with The fire-resistant coating structure according to claim 1.
4. At least one of the hole covering material and the outer covering material is The through hole is positioned in a compressed state along its axial direction. A fire-resistant coating structure according to any one of claims 1 to 3.
5. The outer covering material and the fire-resistant covering material are fixed to each other with fasteners. The fire-resistant coating structure according to claim 1.
6. The end faces of the upper and lower flanges of the steel beam and the fire-resistant covering material are separated. The fire-resistant coating structure according to claim 1.
7. A support member is positioned between the outer covering material and the lower flange of the steel beam. Or, The outer covering material is placed on the lower flange of the steel beam. The fire-resistant coating structure according to claim 1.
8. Multiple through holes are formed in the web. The first hole covering material is provided for each of the through holes. The second hole covering material and the outer covering material include: Multiple insertion holes are formed, The fire-resistant coating structure according to claim 2.
9. The first hole covering material is divided into multiple parts in the circumferential direction. The fire-resistant coating structure according to claim 2.
10. The aforementioned fire-resistant coating material is formed in multiple layers. The fire-resistant coating structure according to claim 1.

Description

This invention relates to a fire-resistant coating structure. Patent Document 1, listed below, describes a configuration in which a fire-resistant coating material is wrapped around a duct and inserted into a duct penetration hole in a steel beam. Japanese Patent Publication No. 2013-28982 This is an exploded perspective view showing an example of a fire-resistant coating structure according to an embodiment of the present invention.(A) is a cross-sectional view showing a fire-resistant covering structure according to an embodiment of the present invention, viewed from the longitudinal direction of the beam, and (B) is a cross-sectional view taken along the line B-B in (A).This is a cross-sectional view showing a modified example of a fire-resistant coating structure according to an embodiment of the present invention, in which a reinforcing member is placed in a through-hole.This is a perspective view showing a modified example of a fire-resistant coating structure according to an embodiment of the present invention, in which the hole-covering material is laminated in the radial direction of the through-hole.This is a cross-sectional view showing a modified example of a fire-resistant coating structure according to an embodiment of the present invention, in which the hole-covering material is laminated in the radial direction of the through-hole.This is a cross-sectional view showing a modified example of a fire-resistant covering structure according to an embodiment of the present invention, in which a wood covering material is used.This is a perspective view showing a modified example of the fire-resistant coating structure according to an embodiment of the present invention, in which a plurality of insertion holes are formed in the outer coating material.This is a perspective view showing an example of a circular covering material in a fire-resistant covering structure according to an embodiment of the present invention. The fire-resistant coating structure according to an embodiment of the present invention will be described below with reference to the drawings. Components indicated by the same reference numerals in each drawing are considered to be the same component. However, unless otherwise specified in the specification, each component is not limited to one, and multiple components may exist. Furthermore, explanations of redundant components and reference numerals in each drawing may be omitted. This disclosure is not limited to the following embodiments, and modifications can be made as appropriate within the scope of the purpose of this disclosure, such as omitting components, substituting different components, or combining one embodiment with various modifications. <Steel beams> Figure 1 shows an exploded perspective view of a fire-resistant covering structure according to an embodiment of the present invention. The steel beam 10 is an H-shaped steel beam having a web 12 and upper and lower flanges 14. A circular through-hole 12H for passing piping through is formed in this steel beam 10. Prior to inserting the piping through the through-hole 12H, the fire-resistant covering structure of the present invention is constructed in the steel beam 10. <Fire-resistant coating structure> As shown in Figure 2(A), the steel beam 10 supports the slab S. The fire-resistant coating structure according to the embodiment of the present invention is a structure for fire-coating both sides and the bottom surface of the steel beam 10 below the slab S. Furthermore, this fire-resistant coating structure is a structure for fire-coating the through-hole 12H formed in the steel beam 10. As shown in Figure 1, the fire-resistant coating structure comprises a perforated coating material 20, an outer coating material 30, and a box-shaped coating material 40. (pore covering material) The hole covering material 20 comprises a first hole covering material 22 and a second hole covering material 24. The first hole covering material 22 covers the hole wall of the through hole 12H in the steel beam 10 and is a fire-resistant covering material with the same thickness as the web 12. The first hole covering material 22 has a through hole 22H formed therein for pipe insertion. The insertion hole 22H is a circular hole when viewed from the direction along the axial direction L of the through hole 12H, and is positioned coaxially with the through hole 12H. Thus, the first hole covering material 22 is formed in an annular shape. As shown in Figure 2(A), the second hole covering material 24 is positioned in contact with the first hole covering material 22 on the outer side of the through hole 12H in the axial direction L, and is a fire-resistant covering material that covers the web surface 12 on the outer circumference of the through hole 12H. The second hole covering material 24 is positioned on both sides of the web 12. Thus, in the hole covering material 20, the first hole covering material 22 and the second hole covering material