JP2733340B2 - Method of supporting concrete casting formwork for construction work - Google Patents

Method of supporting concrete casting formwork for construction work

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Publication number
JP2733340B2
JP2733340B2 JP26025889A JP26025889A JP2733340B2 JP 2733340 B2 JP2733340 B2 JP 2733340B2 JP 26025889 A JP26025889 A JP 26025889A JP 26025889 A JP26025889 A JP 26025889A JP 2733340 B2 JP2733340 B2 JP 2733340B2
Authority
JP
Japan
Prior art keywords
resin
thermoplastic resin
support tube
layer
formwork
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 - Fee Related
Application number
JP26025889A
Other languages
Japanese (ja)
Other versions
JPH03125756A (en
Inventor
徳 石井
英樹 森
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
UBE NITSUTO KASEI KK
Original Assignee
UBE NITSUTO KASEI KK
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Filing date
Publication date
Application filed by UBE NITSUTO KASEI KK filed Critical UBE NITSUTO KASEI KK
Priority to JP26025889A priority Critical patent/JP2733340B2/en
Publication of JPH03125756A publication Critical patent/JPH03125756A/en
Application granted granted Critical
Publication of JP2733340B2 publication Critical patent/JP2733340B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Description

【発明の詳細な説明】 《産業上の利用分野》 本発明は、コンクリート構造物を構築する際に土木,
建築工事で使用されるコンクリート打設型枠の支持方法
に関する。
DETAILED DESCRIPTION OF THE INVENTION << Industrial Application Field >> The present invention relates to the construction of a concrete structure,
The present invention relates to a method for supporting a concrete casting formwork used in construction work.

《従来の技術》 周知のように、土木,建築工事において、コンクリー
ト構造物を構築する際に、コンクリートを打設する空間
を確保するために型枠が使用されている。
<< Prior Art >> As is well known, when constructing a concrete structure in civil engineering and construction work, a formwork is used to secure a space for placing concrete.

この種の型枠は、一般的に、平板状の型枠板を構築し
ようとする構造物の外形に合わせて設置し、型枠板の外
面にバタ材などと呼ばれている型枠支持管を縦横に添設
して、型枠板を立設状態に支持している。
This type of formwork is generally installed according to the outer shape of the structure on which a flat formwork plate is to be constructed, and a formwork support tube called a flutter material or the like is provided on the outer surface of the formwork plate. Are attached vertically and horizontally to support the form plate in an upright state.

このような用途に用いられる型枠支持管としては、従
来、鉄パイプやアルミパイプなどが主に用いられていた
が、高重量,腐蝕性などの取扱上および使用上の問題か
ら、近時、軽量にして高剛性,弾性回復率,耐腐蝕性を
有する繊維強化熱硬化性樹脂(以下、FRPと称する)製
のものが提供されている。
Conventionally, iron pipes and aluminum pipes have been mainly used as formwork supporting pipes used in such applications. However, due to problems in handling and use such as high weight and corrosiveness, recently, A lightweight, fiber-reinforced thermosetting resin (hereinafter referred to as FRP) having high rigidity, elastic recovery, and corrosion resistance is provided.

ところで、本出願人は、軽量な型枠支持管として、中
間層にFRPを配し、内層および被覆層に、FRPと接着性を
有する熱可塑性樹脂を配して、これらを一体化した三層
構造のものを実願昭63−47357号で既に提案している。
By the way, the present applicant has arranged a three-layer structure in which FRP is disposed in the intermediate layer, a thermoplastic resin having adhesiveness to FRP is disposed in the inner layer and the coating layer, and these are integrated as a lightweight form supporting tube. A structure has already been proposed in Japanese Utility Model Application No. 63-47357.

この出願にかかる型枠支持管のより具体的な構造は、
中間層の熱硬化性樹脂として不飽和ポリエステル樹脂、
内層および被覆層の熱可塑性樹脂としてABS樹脂が使用
され、これらの両層が未硬化状の不飽和ポリエステル樹
脂中の架橋性単量体であるスチレンとの接触によって、
熱硬化性樹脂の加熱硬化後にFRPと内層および被覆層と
が強固に接着して、三層が複合一体化し、曲げ,圧縮な
どの物性に優れたものが得られ、型枠支持管として充分
に実用に耐え得るものである。
More specific structure of the formwork support tube according to this application is as follows:
Unsaturated polyester resin as a thermosetting resin for the intermediate layer,
ABS resin is used as the thermoplastic resin of the inner layer and the coating layer, and both of these layers are brought into contact with styrene which is a crosslinkable monomer in the uncured unsaturated polyester resin,
After the thermosetting resin is cured by heating, the FRP and the inner layer and the coating layer are firmly adhered to each other, and the three layers are integrated into a single body, resulting in excellent physical properties such as bending and compression. It can be put to practical use.

しかしながら、この構造の支持管は、工事現場で実際
に採用されるコンクリートの打設方法によって以下に説
明する技術的課題があった。
However, the support pipe of this structure has the following technical problems depending on the concrete placement method actually used in the construction site.

《発明が解決しようとする課題》 すなわち、型枠を用いたコンクリートの打設工法で
は、型枠中に充填したコンクリート内の空気を脱泡さ
せ、締め固めるために、型枠に高周波バイブレータを装
着し、型枠に振動を与える方法がある。
《Problems to be solved by the invention》 That is, in the concrete casting method using a formwork, a high-frequency vibrator is attached to the formwork in order to deaerate and compact the air in the concrete filled in the formwork. Then, there is a method of giving vibration to the mold.

この場合、高周波バイブレータは、型枠支持管に直接
装着されたり、あるいは、型枠板と支持管との間に装着
されるが、いずれにしてもバイブレータを起動すると、
支持管が振動し、支持管が縦横に配置されているので、
被覆層同士が接触している個所に摩擦熱が発生する。
In this case, the high-frequency vibrator is directly attached to the form support tube, or, is mounted between the form plate and the support tube, but in any case, when the vibrator is activated,
Since the support tube vibrates and the support tube is arranged vertically and horizontally,
Friction heat is generated at places where the coating layers are in contact with each other.

このような摩擦熱が発生すると、支持管の被覆層が部
分的に溶融し、相互に接着することになり、コンクリー
トが硬化した後に型枠を撤去する際に、人力での取外し
が困難になり、無理に引剥がすと、被覆層が剥離し、FR
Pが露出し、作業上および耐久性上の問題が生じた。
When such frictional heat is generated, the coating layer of the support pipes partially melts and adheres to each other, which makes it difficult to remove the formwork manually after the concrete has hardened when removing the formwork. , Forcibly peel off, the coating layer peels off, FR
P was exposed, causing problems in work and durability.

そこで、本発明者らは、このような問題を解決できる
支持方法を鋭意検討し、本発明を完成したものであり、
その目的とするところは、高周波バイブレータの振動に
よって融着することがない建設工事用コンクリート打設
型枠の支持方法を提供することにある。
Therefore, the present inventors have intensively studied a supporting method that can solve such a problem, and have completed the present invention.
It is an object of the present invention to provide a method for supporting a concrete casting formwork for construction work, which is not fused by the vibration of a high-frequency vibrator.

《課題を解決するための手段》 上記目的を達成するために、本発明は、熱可塑性樹脂
からなる内層と、この内層を囲繞する繊維強化熱硬化性
樹脂からなる中間層と、この中間層の外周を被覆する熱
可塑性樹脂からなる被覆層とを備え、前記熱可塑性樹脂
が前記熱硬化性樹脂と化学的親和性を有している三層構
造の支持管を型枠板の外側に沿って設置し、この型枠板
を支持する方法であって、前記支持管は外周部分が部分
的に相互に接触するように前記型枠板の外側に縦横に設
置されるとともに、前記支持管の前記被覆層の少くとも
最外層の熱可塑性樹脂を相互に相溶性がないもので構成
したことを特徴とする。
<< Means for Solving the Problems >> In order to achieve the above objects, the present invention provides an inner layer made of a thermoplastic resin, an intermediate layer made of a fiber-reinforced thermosetting resin surrounding the inner layer, A coating layer made of a thermoplastic resin covering the outer periphery, a support tube having a three-layer structure in which the thermoplastic resin has a chemical affinity with the thermosetting resin is formed along the outside of the mold plate. And supporting the form plate, wherein the support tube is installed vertically and horizontally on the outside of the form plate so that an outer peripheral portion thereof partially contacts each other, and It is characterized in that at least the outermost layer of the thermoplastic resin of the coating layer is composed of mutually incompatible ones.

本発明の方法に使用できる三層構造の型枠支持管は、
型枠板にこれを縦横に当接させて設置し、型枠板を支持
する際に、縦横の支持管の外周部が部分的に接触した状
態で、高周波バイブレータによって振動する80〜130回
/秒程度で振動させられて、接触面同士が摩擦熱によっ
て溶融しても、相互に相溶性を有せず、冷却後において
相互に融着しない熱可塑性樹脂を、縦ないしは横に配置
される支持管のいずれか一方の、少くとも最外層の被覆
層に用いる。
The three-layered form support tube that can be used in the method of the present invention is
This is set in contact with the form plate vertically and horizontally, and when supporting the form plate, the vibrator is vibrated by a high-frequency vibrator 80 to 130 times with the outer peripheral portions of the vertical and horizontal support pipes partially in contact. Vibration in about a second, even if the contact surfaces are melted by frictional heat, they are not compatible with each other, and a thermoplastic resin that does not fuse with each other after cooling is placed vertically or horizontally. Used for at least the outermost coating of either one of the tubes.

本発明の方法に使用する型枠支持管の被覆層の最外層
の熱可塑性樹脂の組合わせとしては、被覆層全体を同一
の熱可塑性樹脂とすることも併せて考慮すると、ABS
(アクリルニトリル。ブタジエン・スチレン)樹脂と、
PC(ポリカーボネイト)樹脂との組合わせが望ましい。
As a combination of the thermoplastic resin of the outermost layer of the coating layer of the form support tube used in the method of the present invention, ABS also considering that the entire coating layer is made of the same thermoplastic resin.
(Acrylonitrile, butadiene / styrene) resin,
Combination with PC (polycarbonate) resin is desirable.

《発明の作用効果》 本発明の建設工事用コンクリート打設型枠の支持方法
は、型枠板の外側に部分的に相互に接触した状態で縦横
に設置される支持管の少くとも最外層の被覆層の樹脂
を、相溶性がないもので構成するのでコンクリートを打
設したときに、脱泡のために高周波バイブレータなどに
よって振動を与えても、縦横の支持管の接触部分におい
て相互に融着することがない。
<< Effects of the Invention >> The method for supporting a concrete casting formwork for construction work according to the present invention comprises a method of supporting at least the outermost layer of a support pipe installed vertically and horizontally in a state of being partially in contact with the outside of the formwork plate. Since the resin of the coating layer is made of incompatible resin, even if concrete is cast, vibration is applied by a high-frequency vibrator or the like to remove bubbles. Never do.

よって、本発明方法によれば、高周波バイブレータを
使用するコンクリートの打設工事にも、FRPを主体とす
る三層構造の軽量な型枠支持管を使用することが可能に
なって、型枠組立て工期の短縮化や、労力の低減が図れ
る。
Therefore, according to the method of the present invention, it is possible to use a lightweight three-layered formwork supporting pipe mainly composed of FRP also for concrete placing work using a high-frequency vibrator, and formwork assembly. The construction period can be shortened and labor can be reduced.

《実施例》 以下、この発明の好適な実施例について添付図面を参
照にして詳細に説明する。
Embodiment Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

第1図は、この発明にかかる建設工事用コンクリート
打設型枠の支持方法で用いる支持管の一例を示してい
る。
FIG. 1 shows an example of a support pipe used in the method for supporting a concrete casting formwork for construction work according to the present invention.

同図に示す支持管1は、物性に対する材料の使用効率
を考慮して矩形状の断面としたものを例示しており、支
持管1は、熱可塑性樹脂からなる内層2と、この内層2
を囲繞し、長尺状の補強繊維に未硬化状の熱硬化性樹脂
を含浸して硬化させたFRPからなる中間層3と、この中
間層3の外周を被覆する熱可塑性樹脂からなる被覆層4
の三層構造から構成されている。
The support tube 1 shown in the figure has a rectangular cross section in consideration of the efficiency of use of the material with respect to physical properties. The support tube 1 has an inner layer 2 made of a thermoplastic resin and an inner layer 2 made of a thermoplastic resin.
And an intermediate layer 3 made of FRP cured by impregnating a long reinforcing fiber with an uncured thermosetting resin, and a coating layer made of a thermoplastic resin covering the outer periphery of the intermediate layer 3. 4
It has a three-layer structure.

上記内層2の熱可塑性樹脂には、中間層3のFRPのマ
トリックス樹脂の組成物と化学的親和性を有し、FRPの
硬化後に接着する必要があることから、例えば、中間層
3の熱硬化性樹脂としてスチレンを含む不飽和ポリエス
テル樹脂を使用するときは、スチレンを誘導体成分とし
て含む、ABS樹脂,AAS樹脂,AS樹脂,AES樹脂,PS樹脂、あ
るいはPC樹脂などが用いられる。
Since the thermoplastic resin of the inner layer 2 has a chemical affinity with the composition of the matrix resin of FRP of the intermediate layer 3 and needs to be bonded after the FRP is cured, for example, the thermosetting of the intermediate layer 3 When an unsaturated polyester resin containing styrene is used as the conductive resin, an ABS resin, an AAS resin, an AS resin, an AES resin, a PS resin, a PC resin, or the like containing styrene as a derivative component is used.

中間層3の補強繊維としては、ガラス繊維、炭素繊維
などの無機繊維や、芳香族ポリアミド繊維,ポリエステ
ル繊維,ビニロン繊維,ナイロン繊維などの合成繊維な
ど長繊維状で高強度、低伸度のものが挙げられる。
As the reinforcing fibers for the intermediate layer 3, long fibers such as inorganic fibers such as glass fibers and carbon fibers, and synthetic fibers such as aromatic polyamide fibers, polyester fibers, vinylon fibers, and nylon fibers have high strength and low elongation. Is mentioned.

また、熱硬化性樹脂としては、不飽和ポリエステル樹
脂,エポキシ樹脂,フェノール樹脂,などが挙げられ
る。
Examples of the thermosetting resin include an unsaturated polyester resin, an epoxy resin, and a phenol resin.

さらに、最外周の被覆層4の熱可塑性樹脂としては、
内層2の樹脂と同様に中間層3と化学的親和性および接
着性を有し、かつ、縦あるいは横に使用する支持管1の
被覆層4同士を接触させて高周波バイブレータで振動さ
せても相互に接着しないか、あるいは、接着しても容易
に剥がせるいわゆる相溶性を有しない樹脂が用いられ
る。
Further, as the thermoplastic resin of the outermost coating layer 4,
Like the resin of the inner layer 2, it has chemical affinity and adhesiveness with the intermediate layer 3, and even if the coating layers 4 of the support tube 1 used vertically or horizontally are brought into contact with each other and vibrated by a high-frequency vibrator, A resin having no so-called compatibility that does not adhere to the resin or that can be easily peeled off even if it adheres is used.

以下により具体的な実施例について説明する。 Hereinafter, specific examples will be described.

実施例1 第2図は、三層構造の支持管1を製造する工程を示し
ている。
Example 1 FIG. 2 shows a process for manufacturing a support tube 1 having a three-layer structure.

同図に示す製造工程では、まず、押出機10よりABS樹
脂を押出して内寸40mm,外寸43mmの矩形状の角型パイプ
(内層2)を連続的に製造し、この外周に単糸径が23.5
μmで目付が4.4g/mのガラス繊維ロービング11を所要本
数、スチレンを架橋性単量体として含む不飽和ポリエス
テル樹脂浴12に導いて熱硬化性樹脂を含浸し、絞りノズ
ル13で絞り形成して外寸49mmの矩形状の未硬化状物14を
得、これを被覆押出機15に連通して溶融状のABS樹脂で
被覆した。
In the manufacturing process shown in the figure, first, an ABS resin is extruded from an extruder 10 to continuously manufacture a rectangular square pipe (inner layer 2) having an inner size of 40 mm and an outer size of 43 mm. Is 23.5
A required number of glass fiber rovings 11 having a basis weight of 4.4 g / m and a non-saturated polyester resin bath 12 containing styrene as a crosslinkable monomer were impregnated with a thermosetting resin, and formed by squeezing with a squeezing nozzle 13. Thus, a rectangular uncured material 14 having an outer dimension of 49 mm was obtained. The uncured material 14 was communicated with a coating extruder 15 and covered with a molten ABS resin.

引き続いて、被覆したABS樹脂を水槽16で冷却固化し
た後、これを熱湯層17に導いて硬化させた。
Subsequently, the coated ABS resin was cooled and solidified in a water bath 16 and then led to a hot water layer 17 to be cured.

一方、上記ABS樹脂被覆の型枠支持管1と組合わせて
使用する他方の型枠支持管1′として、このABS樹脂に
代えてPC樹脂によって被覆したものを得た。
On the other hand, the other form support tube 1 'used in combination with the form support tube 1 coated with the ABS resin was obtained by coating with a PC resin instead of the ABS resin.

このようにして製造された2つの支持管1,1′は、中
間層3のガラス繊維体積含有率が54%、角形パイプの内
層2と、FRP中間層3およびABS樹脂あるいはPC樹脂の被
覆層4とが一体化した外寸50mmのものであった。
The two support tubes 1 and 1 'thus manufactured have an intermediate layer 3 having a glass fiber volume content of 54%, a rectangular pipe inner layer 2, an FRP intermediate layer 3 and a coating layer of ABS resin or PC resin. 4 and 50 mm in external dimensions.

この支持管1,1′を実用に即してテストするために、
型枠板として1800×1800mmの平板状の板材5を使用し、
本実施例のABS樹脂被覆による支持管1をまず縦方向に3
00mm間隔で配置し、この縦方向の支持管1上にPC樹脂被
覆による支持管1′を横方向に2本1組で600mmの間隔
で配置し、これらの縦横の支持管1,1′の交差部を固定
金具6により締め付けた。(第3図参照) しかる後、この横方向の支持管1′にコンクリート締
固め用の高周波バイブレータ(ハヤシバイブレータ、HK
M5CSK)を取り付け、インバータの出力周波数を240HZと
して、バイブレータの振動数7200rpmで3分間振動させ
た。
In order to test this support tube 1,1 'in practical use,
Using a flat plate material 5 of 1800 x 1800 mm as a form plate,
First, the support tube 1 coated with the ABS resin of this embodiment is
The support tubes 1 ′ coated with PC resin are horizontally arranged on the vertical support tubes 1 at intervals of 600 mm. The intersection was fastened by the fixture 6. (See Fig. 3) After that, a high-frequency vibrator (Hayashi vibrator, HK
M5CSK), the output frequency of the inverter was set to 240 Hz, and the vibrator was vibrated at a frequency of 7200 rpm for 3 minutes.

そして、固定金具6を取外して、支持管1,1′の縦横
交差部の被覆層4同士の融着状態を観察したところ、若
干の融着痕跡が認められたものの、両者はほとんど接着
することなく容易に人力で分離することができた。
Then, the fixing bracket 6 was removed, and the fusion state of the coating layers 4 at the vertical and horizontal intersections of the support tubes 1 and 1 'was observed. As a result, some traces of fusion were observed, but both were almost adhered. And could be easily separated manually.

なお、本実施例では、ABS樹脂被覆層とPC樹脂被覆層
とをそれぞれカラーマスターバッチを添加して黒色およ
びグレー色に着色した。これによって縦横の支持管1,
1′の使分けが簡単にできた。
In this example, the ABS resin coating layer and the PC resin coating layer were each colored black and gray by adding a color master batch. This allows the vertical and horizontal support tubes 1,
1 ′ was easily used.

比較例1 上記実施例1に代えて、実施例1で得たABS樹脂被覆
の支持管1を縦横の双方に使用して板材5を支持し、上
記実施例1と同様に高周波バイブレータによる縦横支持
管1,1の交差部の融着状態をテストした。
Comparative Example 1 In place of Example 1, the ABS resin-coated support tube 1 obtained in Example 1 was used in both the vertical and horizontal directions to support the plate material 5, and the vertical and horizontal support using a high-frequency vibrator as in Example 1 above The state of fusion at the intersection of tubes 1,1 was tested.

その結果、交差部のABS樹脂同士は、強固に融着し、
人力では引き離すことが困難であり、テコを利用して引
き離したところ、縦方向の支持管1交差部のABS樹脂被
覆層は、直径約20mmに亘って剥離して、母材が破壊状態
になった。
As a result, the ABS resin at the intersection is fused strongly,
It is difficult to separate them with human power, and when they are separated using a lever, the ABS resin coating layer at the intersection of the vertical support tube 1 peels off over a diameter of about 20 mm, and the base material is broken. Was.

また、PC樹脂被覆のものを縦横に配置した場合にも、
上記と同様に母材が破壊状態になった。
Also, when the PC resin coating is arranged vertically and horizontally,
The base material was destroyed in the same manner as above.

【図面の簡単な説明】[Brief description of the drawings]

第1図は本発明方法で使用する型枠支持管の一例を示す
斜視図、第2図は同支持管の製造工程を示す説明図、第
3図は本発明の型枠支持方法の一例を示す説明図であ
る。 1,1′……支持管 2……内層 3……中間層 4……被覆層 5……板材 6……固定金具
FIG. 1 is a perspective view showing an example of a formwork support tube used in the method of the present invention, FIG. 2 is an explanatory view showing a manufacturing process of the formwork tube, and FIG. 3 is an example of a formwork support method of the present invention. FIG. 1, 1 '... support tube 2 ... inner layer 3 ... intermediate layer 4 ... coating layer 5 ... plate material 6 ... fixing bracket

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】熱可塑性樹脂からなる内層と、この内層を
囲繞する繊維強化熱硬化性樹脂からなる中間層と、この
中間層の外周を被覆する熱可塑性樹脂からなる被覆層と
を備え、前記熱可塑性樹脂が前記熱硬化性樹脂と化学的
親和性を有している三層構造の支持管を型枠板の外側に
沿って設置し、この型枠板を支持する方法であって、前
記支持管は外周部分が部分的に相互に接触するように前
記型枠板の外側に縦横に設置されるとともに、前記支持
管の前記被覆層の少くとも最外層の熱可塑性樹脂を相互
に相溶性がないもので構成したことを特徴とする建設工
事用コンクリート打設型枠の支持方法。
An inner layer made of a thermoplastic resin, an intermediate layer surrounding the inner layer made of a fiber-reinforced thermosetting resin, and a coating layer made of a thermoplastic resin covering an outer periphery of the intermediate layer; A method of installing a support tube having a three-layer structure in which the thermoplastic resin has a chemical affinity with the thermosetting resin along the outside of the form plate, and supporting the form plate, The support tube is installed vertically and horizontally on the outside of the form plate so that the outer peripheral portion partially contacts each other, and the thermoplastic resin of at least the outermost layer of the coating layer of the support tube is compatible with each other. A method for supporting a concrete casting formwork for construction work, characterized in that the method is constituted by one having no structure.
【請求項2】上記支持管のうち縦または横方向に配置さ
れるいずれか一方の少くとも最外層の熱可塑性樹脂がAB
S樹脂で構成され、かつ、他方の支持管の少くとも最外
層の熱可塑性樹脂がPC樹脂で構成されていることを特徴
とする請求項1記載の建設工事用コンクリート打設型枠
の支持方法。
2. The thermoplastic resin of at least one of the outermost layers of one of the support tubes arranged in the vertical or horizontal direction is AB.
2. A method according to claim 1, wherein at least the outermost thermoplastic resin of the other support pipe is made of PC resin. .
JP26025889A 1989-10-06 1989-10-06 Method of supporting concrete casting formwork for construction work Expired - Fee Related JP2733340B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26025889A JP2733340B2 (en) 1989-10-06 1989-10-06 Method of supporting concrete casting formwork for construction work

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26025889A JP2733340B2 (en) 1989-10-06 1989-10-06 Method of supporting concrete casting formwork for construction work

Publications (2)

Publication Number Publication Date
JPH03125756A JPH03125756A (en) 1991-05-29
JP2733340B2 true JP2733340B2 (en) 1998-03-30

Family

ID=17345551

Family Applications (1)

Application Number Title Priority Date Filing Date
JP26025889A Expired - Fee Related JP2733340B2 (en) 1989-10-06 1989-10-06 Method of supporting concrete casting formwork for construction work

Country Status (1)

Country Link
JP (1) JP2733340B2 (en)

Also Published As

Publication number Publication date
JPH03125756A (en) 1991-05-29

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