JP2525050Y2 - Synthetic fireproof coating structure - Google Patents
Synthetic fireproof coating structureInfo
- Publication number
- JP2525050Y2 JP2525050Y2 JP5756890U JP5756890U JP2525050Y2 JP 2525050 Y2 JP2525050 Y2 JP 2525050Y2 JP 5756890 U JP5756890 U JP 5756890U JP 5756890 U JP5756890 U JP 5756890U JP 2525050 Y2 JP2525050 Y2 JP 2525050Y2
- Authority
- JP
- Japan
- Prior art keywords
- fire
- steel column
- resistant coating
- sprayed
- coating structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Panels For Use In Building Construction (AREA)
- Building Environments (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 この考案は、プレキャストコンクリート板と吹付け耐
火被覆材との取合部を、バックアップ材等を用いない納
まりとした合成耐火被覆構造に関する。[Detailed description of the invention] [Industrial application field] This invention relates to a composite fire-resistant coating structure in which a joint portion between a precast concrete plate and a sprayed fire-resistant coating material is housed without using a backup material or the like.
従来のプレキャストコンクリート板（以下PC板と称
す）と吹付け耐火被覆による合成耐火被覆によって、火
災時における鉄骨柱の温度上昇を所定時間防止するに
は、例えば第４図、第５図に示すような構造が採られて
いた。In order to prevent the temperature of a steel column from rising during a fire for a predetermined time by a conventional fire-resistant coating made of a precast concrete plate (hereinafter referred to as a PC plate) and a sprayed fire-resistant coating, for example, as shown in FIGS. 4 and 5 Structure was adopted.
図において、鉄骨柱１とPC板２に固着されたバックア
ップ材３との間には、力骨と称する丸鋼４とメタルラス
５とが取付けられて、吹付け下地が形成され、これらの
外周に耐火被覆材６が、所定厚みに吹付けられて断熱層
を形成していた。In the figure, between a steel column 1 and a back-up material 3 fixed to a PC board 2, a round steel 4 and a metal lath 5, which are referred to as power bones, are attached to form a spray base, and these are formed on the outer periphery thereof. The refractory coating 6 was sprayed to a predetermined thickness to form a heat insulating layer.
ここで、前記吹付け下地を固定するためのバックアッ
プ材３がPC板２に固着される理由は、もしバックアップ
材３を欠如し、耐火被覆材６だけがPC材２に付着した構
造とすると、火災時における加熱によってPC板が反り、
吹付け耐火被覆との間に大きな空隙が生じ、熱風や火炎
が耐火被覆層で囲まれた空間７内に侵入して鉄骨柱１を
加熱するため、高性能を要求される例えば３時間耐火条
件を維持することができない。そのためにバックアップ
材３の使用は必要不可欠となる。Here, the reason why the backup material 3 for fixing the spray base is fixed to the PC plate 2 is that if the backup material 3 is omitted and only the fireproof coating material 6 is attached to the PC material 2, PC board warps due to heating during a fire,
A large gap is formed between the sprayed refractory coating and hot air or flame enters the space 7 surrounded by the refractory coating layer to heat the steel column 1, so that high performance is required, for example, for 3 hours. Cannot be maintained. Therefore, the use of the backup material 3 is indispensable.
しかし、このバックアップ材取付けは耐火被覆工事を
行う前に完了しておかねばならない作業であるが、その
取付けのためには予めPC板にアンカー金物を所定のピッ
チで精度良く埋設しておく必要があり、一方、バックア
ップ材にはこのアンカー金物に係合するボルト孔等を精
度の良いピッチで設けておかねばならないため施工精度
が要求され、また耐熱接着剤を施す等、多くの労力が費
やされるといった問題があった。However, the installation of this backup material is a work that must be completed before the fire-resistant coating work is performed, but in order to install it, it is necessary to bury anchor hardware in the PC board at a predetermined pitch with high precision. On the other hand, the backup material must be provided with bolt holes and the like that engage with the anchor hardware at a high-precision pitch, so construction accuracy is required, and a lot of labor is spent, such as applying a heat-resistant adhesive. There was such a problem.
この考案は、このような従来の作業性の問題にかんが
みてなされたものであって、吹付け下地の内の荒目の金
網縁端部を予めPC板に埋設してバックアップ材を不要と
する納まり構造とすること等により、上記課題を解決す
ることを目的としている。This invention has been made in view of such a conventional workability problem, and embeds a rough wire mesh edge portion of a sprayed base in a PC board in advance to eliminate a backup material. The purpose of the present invention is to solve the above-mentioned problem by adopting a fitting structure.
この考案は、上記目的を達成するために、プレキャス
トコンクリート板に予め端縁部を埋設した荒目の金網
と、鉄骨柱に所定の間隔でプレキャストコンクリート板
方向に延在するごとくその端部を溶着した多数の力骨に
取り付けたメタルラスとを重ねた吹付け下地に、前記鉄
骨柱と一体的に耐火被覆材を所定厚みに吹付けてなる合
成耐火被覆構造としたものである。In order to achieve the above-mentioned object, this invention welds a rough metal mesh in which an edge is buried in a precast concrete plate in advance, and welds the end to a steel column as if it extends in the direction of the precast concrete plate at a predetermined interval. A composite fire-resistant coating structure is formed by spraying a refractory coating material to a predetermined thickness integrally with the steel column on a spray base on which a metal lath attached to a large number of power bones is overlapped.
本考案は、上記のような構成としたので、鉄骨柱とPC
板とは直接連結されておらず荒目の金網とメタルラスと
が位置的にすこしずれて重なっているだけなので、地震
時等に相互に大きな外力を及ぼし合わないのでPC板や耐
火被覆を破損させたりすることはない。Since the present invention has the above configuration, the steel column and the PC
It is not directly connected to the board, and the rough wire mesh and metal lath just overlap slightly apart in position. No.
すなわち、上記のような構造とすることによって、火
災時にPC板に反り等が生じても、吹付け耐火被覆材との
境界面に集中的に大きな空隙が生じることなく、分散し
た小亀裂となり火炎が直接、前記空間７内へ侵入するこ
とがなくなる。従って鉄骨柱の温度は許容値以内に維持
することが出来、合成耐火被覆としての性能を満足する
構造となる。In other words, by adopting the above structure, even if the PC board warps in the event of a fire, a large crack is not concentrated on the boundary surface with the sprayed refractory coating material, and the small cracks are dispersed, resulting in a flame. Does not directly enter the space 7. Therefore, the temperature of the steel column can be maintained within the allowable value, and the structure satisfies the performance as the synthetic refractory coating.
以下、本考案を図面を参照して説明する。第１〜第３
図は本考案に係る一実施例を示す図である。なお、従来
例と同一の部材については同一符号を付し、重複する説
明を省く。Hereinafter, the present invention will be described with reference to the drawings. First to third
FIG. 1 is a diagram showing an embodiment according to the present invention. The same members as those in the conventional example are denoted by the same reference numerals, and redundant description will be omitted.
図において、10は一方の端縁部10aを予めPC板２内に
埋設した荒目の金網であって、本実施例においては太さ
3.2mm程度の鉄線（軟鋼線）を約100mmメッシュに編組し
たものである。また、この金網は、鉄骨柱１がＨ形鋼で
あればウエブ両端のフランジ間隔にほぼ等しい間隔を保
つ２枚１組よりなる。In the figure, reference numeral 10 denotes a coarse wire mesh in which one edge 10a is embedded in the PC board 2 in advance, and in this embodiment, the thickness is 10 mm.
It is made by braiding an iron wire (mild steel wire) of about 3.2 mm into a mesh of about 100 mm. If the steel column 1 is an H-section steel, the wire mesh is made up of a pair of two pieces that keep a distance substantially equal to the distance between the flanges at both ends of the web.
11は鉄骨柱１のフランジ部に所定の間隔でPC板２方向
に延在するごとく、その端部を溶着した力骨で、実施例
では太さ9mmの丸鋼を450mm以下のピッチで設けている。
この力骨11にメタルラス12を取付け吹付け下地を形成
し、この下地と鉄骨柱１の外周とへ一体的に例えばロッ
クウール等の耐火被覆材６を所定厚みに吹き付けて、耐
火被覆層を形成する。Reference numeral 11 denotes a power bone having its ends welded to the flange portion of the steel column 1 at predetermined intervals so as to extend in the direction of the PC board 2. In the embodiment, 9 mm-thick round steel is provided at a pitch of 450 mm or less. I have.
A metal lath 12 is attached to the power bone 11 to form a spray base, and a fire-resistant coating material 6 such as rock wool is sprayed integrally to the base and the outer periphery of the steel column 1 to a predetermined thickness to form a fire-resistant coating layer. I do.
以上の耐火構造とすることにより、火災時にPC板２に
反りが生じても、荒目の金網10の端縁部10aはPC板内に
埋設されており、且つ力骨11に取り付けられたメタルラ
ス12とは位置的にすこしずれて重なり合っているだけな
ので耐火被覆材６は伸縮可能であり、従ってPC板２と吹
付け耐火被覆材６との境界面に大きな空隙が生じること
はなく、分散した小亀裂となるので火炎が直接、空間７
内へ侵入することはない。すなわち、鉄骨柱１は直接、
火炎に接触しないので鉄骨の温度上昇は許容値以内に維
持することができ、例えば３時間耐火被覆としての高性
能を満足する耐火構造ととすることができる。With the above fire-resistant structure, even if the PC board 2 warps in the event of a fire, the edge 10a of the coarse wire mesh 10 is buried in the PC board and the metal lath Since the position is slightly different from the position 12 and overlaps, the refractory coating 6 is stretchable, so that there is no large gap at the interface between the PC board 2 and the sprayed refractory coating 6 and the refractory coating 6 is dispersed. The flame is directly in the space 7 because it becomes a small crack.
It does not penetrate inside. That is, the steel column 1 is directly
Since it does not come into contact with the flame, the temperature rise of the steel frame can be maintained within an allowable value, and for example, a refractory structure satisfying high performance as a refractory coating for 3 hours can be obtained.
以上、説明したように本考案によれば、高性能を要求
される３時間耐火被覆などの工法においても従来のよう
なバックアップ材を用いる必要はなく、バックアップ材
の取付け精度を保つための工事の手間が省略でき、工期
も短縮できる等の効果が得られる。As described above, according to the present invention, there is no need to use a conventional backup material even in a method such as a three-hour fire-resistant coating that requires high performance. Effects such as labor can be omitted and the construction period can be shortened.
第１図は本考案に係る一実施例の斜視断面図、第２図は
実施例における耐火被覆材吹付け下地を示す立面図、第
３図は第１図の上面図、第４図は従来例の斜視断面図、
第５図は第４図の上面図である。 １……鉄骨柱、２……プレキャストコンクリート板（PC
板）、６……耐火被覆材、10……金網、11……力骨、12
……メタルラス。FIG. 1 is a perspective sectional view of one embodiment according to the present invention, FIG. 2 is an elevation view showing a fire-resistant coating material spray base in the embodiment, FIG. 3 is a top view of FIG. 1, and FIG. Conventional perspective sectional view,
FIG. 5 is a top view of FIG. 1 ... steel column, 2 ... precast concrete plate (PC
Plate), 6 ... fireproof covering material, 10 ... wire mesh, 11 ... power bone, 12
...... Metal lath.
Claims (1)
を埋設した荒目金網と、鉄骨柱に所定の間隔でプレキャ
ストコンクリート板方向に延在するごとくその端部を溶
着した多数の力骨に取り付けたメタルラスとを重ねた吹
付け下地に、前記鉄骨柱と一体的に耐火被覆材を所定厚
みに吹付けてなる合成耐火被覆構造。The present invention is characterized in that a pre-cast concrete plate is provided with a rough wire mesh whose edges are buried in advance, and a plurality of power bones whose ends are welded to a steel column at predetermined intervals in the direction of the pre-cast concrete plate. A composite fire-resistant coating structure in which a fire-resistant coating material is sprayed to a predetermined thickness integrally with the steel column on a sprayed base on which a metal lath is superimposed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5756890U JP2525050Y2 (en) | 1990-05-31 | 1990-05-31 | Synthetic fireproof coating structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5756890U JP2525050Y2 (en) | 1990-05-31 | 1990-05-31 | Synthetic fireproof coating structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0416203U JPH0416203U (en) | 1992-02-10 |
| JP2525050Y2 true JP2525050Y2 (en) | 1997-02-05 |
Family
ID=31582396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5756890U Expired - Lifetime JP2525050Y2 (en) | 1990-05-31 | 1990-05-31 | Synthetic fireproof coating structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2525050Y2 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6314895B2 (en) * | 2015-04-06 | 2018-04-25 | Ｊｆｅスチール株式会社 | Composite covered fireproof structure of steel column and its construction method |
| JP6432493B2 (en) * | 2015-11-30 | 2018-12-05 | Ｊｆｅスチール株式会社 | Composite covered fireproof structure of steel column and its construction method |
| JP6544297B2 (en) * | 2016-05-26 | 2019-07-17 | Ｊｆｅスチール株式会社 | Composite-coated refractory structure of steel column and its installation method |
| JP6817052B2 (en) * | 2016-12-13 | 2021-01-20 | Ｉｈｉ運搬機械株式会社 | Fireproof coating construction method |
| JP6508289B2 (en) * | 2017-10-27 | 2019-05-08 | Ｊｆｅスチール株式会社 | Construction method of composite coated fireproof structure of steel frame column |
| JP6819650B2 (en) * | 2018-05-14 | 2021-01-27 | Ｊｆｅスチール株式会社 | Synthetic coating fireproof structure of steel columns and its construction method |
| JP7112951B2 (en) * | 2018-12-14 | 2022-08-04 | 株式会社竹中工務店 | How to build a fire wall |
| JP6947235B2 (en) * | 2019-02-05 | 2021-10-13 | Ｊｆｅスチール株式会社 | Synthetic coating fireproof structure of steel pipe columns |
| JP7210360B2 (en) * | 2019-03-29 | 2023-01-23 | 株式会社エーアンドエーマテリアル | Lath material support and construction method of spray coating material using the same |
-
1990
- 1990-05-31 JP JP5756890U patent/JP2525050Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0416203U (en) | 1992-02-10 |
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