JPH0572492B2 - - Google Patents
Info
- Publication number
- JPH0572492B2 JPH0572492B2 JP62113854A JP11385487A JPH0572492B2 JP H0572492 B2 JPH0572492 B2 JP H0572492B2 JP 62113854 A JP62113854 A JP 62113854A JP 11385487 A JP11385487 A JP 11385487A JP H0572492 B2 JPH0572492 B2 JP H0572492B2
- Authority
- JP
- Japan
- Prior art keywords
- slab
- column
- support plate
- concrete
- flat slab
- 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
- 210000002435 tendon Anatomy 0.000 claims description 26
- 239000004567 concrete Substances 0.000 claims description 15
- 230000002787 reinforcement Effects 0.000 claims description 15
- 239000011178 precast concrete Substances 0.000 claims description 8
- 239000011513 prestressed concrete Substances 0.000 claims description 4
- 238000009415 formwork Methods 0.000 description 8
- 238000010276 construction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Reinforcement Elements For Buildings (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、プレストレストコンクリート造のス
ラブを独立柱の柱頭部で支持するフラツトスラブ
の柱頭部構造に係り、特に柱頭部にキヤピタルを
なくしたフラツトスラブの柱頭部構造に関するも
のである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a column head structure of a flat slab in which a slab made of prestressed concrete is supported by the column head of an independent column, and particularly relates to a column head structure of a flat slab in which a capital is eliminated from the column head. It concerns the structure of the column head.
〔従来の技術〕
梁を用いないでスラブを直接柱で受ける形式の
フラツトスラブ構造は、目障りな梁がなく屋内空
間の有効利用ができ、配線、配管が容易である等
の利点があるため、倉庫や工場等に広く適用され
ている。[Conventional technology] A flat slab structure in which the slab is directly supported by pillars without using beams has advantages such as no obtrusive beams, efficient use of indoor space, and easy wiring and piping. It is widely applied in factories and factories.
しかしながら従来のフラツトスラブでは、柱頭
部におけるフラツトスラブの打抜き剪断（パンチ
ングシヤー）を主としてコンクリートの強度で対
抗させるため、柱頭部のスラブ支持領域にスラブ
厚さとほぼ同厚のコンクリート支版を付加したい
わゆるキヤピタルを設けている。 However, in conventional flat slabs, in order to counter the punching shear of the flat slab at the column head mainly by the strength of the concrete, a so-called capital is added to the slab support area of the column head with a concrete supporting plate of approximately the same thickness as the slab thickness. It is set up.
このためキヤピタルは屋内にドロツプハンチを
生じ、目障りであると同時に梁をなくしたフラツ
トスラブの屋内空間の有効利用、配線、配管工事
の容易等の有利性が十分活かされず、かつキヤピ
タルの型枠工事が面倒で工費および工期の低減が
阻まれるという問題があつた。
As a result, the capital has a drop-hanch indoors, which is an eyesore, and at the same time, the advantages of the flat slab without beams, such as the effective use of indoor space and the ease of wiring and piping work, are not fully utilized, and the formwork construction of the capital is troublesome. There was a problem that the reduction of construction cost and construction period was hindered.
本発明は上記従来技術の問題に鑑みこれを改善
すべくなされたものであつて、その目的とすると
ころは、フラツトスラブの強度を低下させること
なく従来の柱頭部のキヤピタルをなくし、前記フ
ラツトスラブの有利性が最大限活用できると共
に、柱頭部の型枠工事が単純化されて工期および
工費の短縮、低減を図ることができるフラツトス
ラブの柱頭部構造を提供することにある。 The present invention has been made in view of the above-mentioned problems of the prior art and has been made to improve the problems.The purpose of the present invention is to eliminate the conventional capital of the column head without reducing the strength of the flat slab, and to improve the advantages of the flat slab. To provide a flat slab column head structure which can make maximum use of its properties and simplify formwork work for the column head to shorten and reduce construction period and cost.
上記目的を達成するために本発明が採用した技
術手段は、プレストレストコンクリート造のスラ
ブの剪断耐力を柱頭部の支版で補強するフラツト
スラブの柱頭部構造において、前記支版を、フイ
ーレンデイールタイプのトラス筋の下半部を埋込
み、柱軸心を中心として放射状に配置した所定厚
のプレキヤスト支版で構成し、該支版の下面とフ
ラツトスラブ下面とを同一面にし前記トラス筋の
上半部をスラブコンクリートに埋込むようスラブ
コンクリートが打設してあると共に、前記フイー
レンデイールタイプのトラス筋は、前記フラツト
スラブに配筋された縦横二方向のテンドンに夫々
平行する直交二方向のものは、夫々前記プレキヤ
ストコンクリート版上面からの突出高さがテンド
ンの湾曲頂部より高く、かく支版外縁から柱面に
届く長さを有し、縦横二方向のテンドンに斜交す
る方向のトラス筋は、夫々テンドンの配筋を妨害
しない程度の支版上面からの突出高さと、支版外
縁から始まり柱面より適宜離隔した長さを有する
ことを特徴とするものである。
The technical means adopted by the present invention in order to achieve the above object is that in a flat slab column head structure in which the shear strength of a prestressed concrete slab is reinforced with a support plate of the column head, the support plate is replaced with a Vierendeihl type support plate. The lower half of the truss bar is embedded in a precast support plate of a predetermined thickness that is arranged radially around the column axis, and the lower surface of the support plate and the lower surface of the flat slab are flush with each other, and the upper half of the truss bar is embedded. Slab concrete is placed so as to be embedded in the slab concrete, and the Vierendeel type truss reinforcements are arranged in two orthogonal directions parallel to the vertical and horizontal tendons arranged in the flat slab, respectively. The truss bars have a protruding height from the top surface of the precast concrete slab that is higher than the curved top of the tendon, have a length that reaches from the outer edge of the support plate to the column surface, and are diagonal to the tendons in the vertical and horizontal directions, respectively. It is characterized by having a protruding height from the upper surface of the support plate to the extent that it does not interfere with the tendon reinforcement arrangement, and a length starting from the outer edge of the support plate and being appropriately spaced from the column surface.
本発明のスラツトスラブの柱頭部構造では、フ
イーレンデイールタイプのトラス筋の下半部を埋
込み、柱軸心を中心として放射状に配置した所定
厚のプレキヤスト支版を、該支版の下面とフラツ
トスラブの下面とを同一面にし前記トラス筋の上
半部をスラブコンクリートに埋込むようスラブコ
ンクリートが打設してあるので、従来キヤピタル
で対抗したフラツトスラブのパンチングをトラス
筋を放射状に配置した支版で対抗したものである
から、フラツトスラブの強度を低下することなく
従来の柱頭部のキヤピタルをなくすことができ
る。
In the column head structure of the slat slab of the present invention, a precast support plate of a predetermined thickness, in which the lower half of the Veerendeel type truss bar is embedded and arranged radially around the column axis, is connected to the lower surface of the support plate and the flat slab. Since the slab concrete is placed so that the upper half of the truss bars are embedded in the slab concrete with the lower surface flush with the bottom surface, the punching of the flat slab, which was conventionally countered by capital, can be countered by the support plate with truss bars arranged radially. Therefore, the conventional capital of the column head can be eliminated without reducing the strength of the flat slab.
また、フイーレンデイールタイプのトラス筋
は、前記フラツトスラブに配筋された縦横二方向
のテンドンに夫々平行する直交二方向のものは、
夫々前記プレキヤストコンクリート版上面からの
突出高さがテンドンの湾曲頂部より高く、かつ支
版外縁から柱面に届く長さを有し、縦横二方向の
テンドンに斜交する方向のトラス筋は、夫々テン
ドンの配筋を妨害しない程度の支版上面からの突
出高さと、支版外縁から始まり柱面より適宜離隔
した長さを有するので、柱を中心として作用する
フラツトスラブの剪断力に均一かつ有効に対応す
ることができるだけでなく、柱頭部の施工時にお
ける作業効率を低下させることもない。 In addition, the Vierendeel type truss bars are those in two orthogonal directions that are parallel to the vertical and horizontal tendons arranged on the flat slab, respectively.
Each truss bar has a protruding height from the top surface of the precast concrete slab that is higher than the curved top of the tendon, and has a length that reaches from the outer edge of the support plate to the column surface, and extends in a direction diagonally intersecting the tendon in two directions: Each has a protruding height from the top surface of the support plate that does not interfere with tendon reinforcement, and a length that starts from the outer edge of the support plate and is appropriately spaced from the column surface, so it is uniform and effective against the shearing force of the flat slab that acts around the column. Not only can this be applied, but the work efficiency during construction of the column head will not be reduced.
以下本発明を図面に示した一実施例に基づいて
詳細に説明する。
The present invention will be described in detail below based on an embodiment shown in the drawings.
第１図は本発明の柱頭部構造の平面図、第２図
は第１図の−線断面図、第３図は第１図の
−折線断面図、第４図は同上構造の斜視図であ
る。 Fig. 1 is a plan view of the column head structure of the present invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, Fig. 3 is a sectional view taken along the - line in Fig. 1, and Fig. 4 is a perspective view of the same structure. be.
図において１は鉄筋コンクリート造建物内部の
独立柱、２は建物各階層のフラツトスラブ、３は
フラツトスラブ２の剪断耐力を補強する柱頭部の
支版であつて、該支版３は炭素繊維を混入した強
化コンクリートのプレキヤストコンクリート版
で、その大きさは柱１のスパンの1/3〜1/4長さを
一辺とする正方形とし、厚さは所要強度を満足さ
せる厚さで、大凡スラブ厚さの1/4〜1/5とされ中
心部には予め柱１の貫通孔３ａが設けられてい
る。 In the figure, 1 is an independent column inside a reinforced concrete building, 2 is a flat slab on each floor of the building, and 3 is a support plate for the column head that reinforces the shear strength of the flat slab 2. The support plate 3 is reinforced with carbon fiber. This is a pre-cast concrete slab, and its size is a square with one side being 1/3 to 1/4 of the span of column 1, and the thickness is a thickness that satisfies the required strength, approximately the thickness of the slab. The diameter is 1/4 to 1/5, and a through hole 3a of the pillar 1 is previously provided in the center.
この支版３には梯子状のフイーレンデイールタ
イプのトラス筋４が下半部を該支版３に埋込まれ
て、柱１の軸心を中心として放射状に配置されて
いる。 In this support plate 3, ladder-shaped Vielendeel type truss bars 4 are embedded in the lower half of the support plate 3 and are arranged radially around the axis of the column 1.
図示例のトラス筋４は柱１軸心を中心として30
度間隔で12個設けられ、その内フラツトスラブ２
に配筋されたアンボンドタイプの縦横二方向のテ
ンドン５，５に夫々平行する直交二方向のトラス
筋４ａ，４ａは、夫々支版３上面からの突出高さ
ｈがテンドン５の湾曲頂部Ｐより高く、かつ支版
３の外縁３ｂから柱面１ａに届く長さｌを有し、
縦横二方向のテンドン５，５に斜交する方向の他
のトラス筋４ｂ…は、夫々テンドン５の配筋を妨
害しない程度の支版３上面からの突出高さh′が減
少され、かつ長さl′も柱面１ａから適宜離隔して
短縮されている。 The truss bar 4 in the illustrated example is 30 mm centered on the column 1 axis.
12 slabs are provided at degree intervals, of which 2 are flat slabs.
The unbonded type truss reinforcements 4a, 4a running in two orthogonal directions parallel to the vertical and horizontal tendons 5, 5, which are arranged in the vertical and horizontal directions, have a protruding height h from the top surface of the support plate 3, respectively, which is higher than the curved top P of the tendon 5. It is high and has a length l reaching from the outer edge 3b of the support plate 3 to the column surface 1a,
The other truss reinforcements 4b in the direction obliquely intersecting the tendons 5, 5 in the vertical and horizontal directions have their protruding heights h' from the upper surface of the support plate 3 reduced to the extent that they do not interfere with the reinforcement of the tendons 5, and are long. L' is also shortened and spaced appropriately from the columnar surface 1a.
上記の支版３は柱鉄筋を組上げた段階で柱貫通
孔１ａに柱鉄筋を通し柱頭部に設置して固定し、
次にフラツトスラブ２にプレストレスを導入する
アンボンドタイプのテンドン５を縦横に配筋す
る。この後柱型枠６、スラブ型枠７を組立て、柱
コンクリートおよびスラブコンクリートを打設す
る。スラブ型枠７は支版３下面とフラツトスラブ
２下面と同一面となるよう組立てられ、スラブコ
ンクリートは支版３上面から突出したトラス筋４
の上半部を埋込み所定厚さで打設される。 The above-mentioned support plate 3 is fixed by passing the column reinforcing bars through the column through hole 1a and installing it on the column head at the stage when the column reinforcing bars are assembled.
Next, unbonded tendons 5 that introduce prestress into the flat slab 2 are arranged vertically and horizontally. After this, the column formwork 6 and slab formwork 7 are assembled, and column concrete and slab concrete are poured. The slab formwork 7 is assembled so that the bottom surface of the support plate 3 and the bottom surface of the flat slab 2 are flush with each other, and the slab concrete is made of truss reinforcements 4 protruding from the top surface of the support plate 3.
The upper half of the concrete is embedded and cast to a predetermined thickness.
コンクリート硬化後、柱型枠６、スラブ型枠７
を取外し、アンボンドタイプのテンドン５にテン
シヨンを導入してフラツトスラブ２に吊上げ力を
発生せしめてこの工事は終了する。 After concrete hardens, column formwork 6 and slab formwork 7
This work is completed by removing the flat slab 2, introducing a tension into the unbonded type tendon 5, and generating a lifting force on the flat slab 2.
上記においてトラス筋４は上下半部ずつを支版
３とスラブ２に埋込まれるため、スラブ２と支版
３とは構造的に完全に一体化されトラス筋４の強
度がスラブ２に導入されると共に、フラツトスラ
ブ２の柱頭部下面はドロツプハンチなしに平坦と
なる。 In the above, the upper and lower halves of the truss bar 4 are embedded in the support plate 3 and the slab 2, so the slab 2 and the support plate 3 are structurally completely integrated, and the strength of the truss bar 4 is introduced into the slab 2. At the same time, the lower surface of the column head of the flat slab 2 becomes flat without a drop haunch.
また、本実施例では、支版３を炭素繊維入り強
化コンクリートのプレキヤストコンクリート版で
構成しているので、フラツトスラブの柱頭部に作
用する剪断力に一層有効に対抗することができ
る。 Furthermore, in this embodiment, since the support plate 3 is made of a precast concrete plate made of reinforced concrete containing carbon fibers, it is possible to more effectively resist the shearing force acting on the column head of the flat slab.
叙上のように本発明は、プレストレストコンク
リート造のスラブの剪断耐力を柱頭部の支版で補
強するフラツトスラブの柱頭部構造において、前
記支版を、フイーレンデイールタイプのトラス筋
の下半部を埋込み、柱軸心を中心として放射状に
配置した所定厚のプレキヤスト支版で構成し、該
支版の下面とフラツトスラブ下面とを同一面にし
前記トラス筋の上半部をスラブコンクリートに埋
込むようスラブコンクリートが打設してあると共
に、前記フイーレンデイールタイプのトラス筋
は、前記フラツトスラブに配筋された縦横二方向
のテンドンに夫々平行する直交二方向のものは、
夫々前記プレキヤストコンクリート版上面からの
突出高さがテンドンの湾曲頂部より高く、かつ支
版外縁から柱面に届く長さを有し、縦横二方向の
テンドンに斜交する方向のトラス筋は、夫々テン
ドンの配筋を妨害しない程度の支版上面からの突
出高さと、支版外縁から始まり柱面より適宜離隔
した長さを有することを特徴としたので、以下に
述べるような格別な効果を奏する。
As described above, the present invention provides a flat slab column head structure in which the shear strength of a prestressed concrete slab is reinforced with a support plate of the column head, in which the lower half of the Vierendeihl type truss bar is attached to the support plate. Embedded, the slab consists of a precast support plate of a predetermined thickness arranged radially around the column axis, and the lower surface of the support plate and the lower surface of the flat slab are flush with each other, and the upper half of the truss bar is embedded in the slab concrete. Concrete has been placed, and the Vierendeihl type truss reinforcements are in two orthogonal directions parallel to the vertical and horizontal tendons arranged in the flat slab, respectively.
Each truss bar has a protruding height from the top surface of the precast concrete slab that is higher than the curved top of the tendon, and has a length that reaches from the outer edge of the support plate to the column surface, and extends in a direction diagonally intersecting the tendon in two directions: They are characterized by having a protruding height from the top surface of the support plate that does not interfere with the tendon reinforcement, and a length that starts from the outer edge of the support plate and is appropriately spaced from the column surface, so it has the following special effects. play.
(1) フラツトスラブの強度を低下させることなく
従来の柱頭部のキヤピタルをなくすことがで
き、見た目の目障りがなく、かつ屋内空間が最
大限に有効利用できる。また、型枠工事が単純
化されると共に、支版はプレキヤストコンクリ
ートであるから作業性が向上し、さらには構造
が簡易なフイーレンデイールタイプのトラス筋
を使用しているので工期および工費を短縮、低
減することができる。(1) It is possible to eliminate the conventional capital on the column head without reducing the strength of the flat slab, and it is visually unobtrusive, and indoor space can be used to the maximum extent possible. In addition, formwork work is simplified, and workability is improved because the supports are made of precast concrete.Furthermore, the use of simple Vierendeel type truss bars reduces construction time and costs. Can be shortened or reduced.
(2) フイーレンデイールタイプのトラス筋は、柱
軸心を中心として放射状に配置されているの
で、プレキヤスト支版が剪断力に対して均一に
対応することができる。(2) Since the Vielendeel type truss bars are arranged radially around the column axis, the precast support plate can respond uniformly to shear forces.
(3) フラツトスラブに配筋された縦横二方向のテ
ンドンに夫々平行する直交二方向のトラス筋は
支版外縁から柱面に届く長さを有しているの
で、柱頭廻りに作用する剪断力に有効に対抗す
ることができる。(3) The truss reinforcements in two orthogonal directions that are parallel to the vertical and horizontal tendons arranged on the flat slab have a length that reaches from the outer edge of the support plate to the column surface, so they are effective against shearing force acting around the column capital. can be effectively countered.
(4) 縦横二方向のテンドンに斜交する方向のトラ
ス筋は、夫々テンドンの配筋を妨害しない程度
の支版上面からの突出高さと、支版外縁から始
まり柱面より適宜離隔した長さを有しているの
で、十分な剪断耐力を確保するものでありなが
ら、作業性を低下させることはない。(4) The truss reinforcements in the direction obliquely intersecting the tendons in the vertical and horizontal directions should have a protruding height from the top surface of the support plate that does not interfere with the reinforcement of the tendons, and a length that starts from the outer edge of the support plate and is appropriately spaced from the column surface. Since it has a sufficient shear strength, it does not reduce workability.
図面は本発明の一実施例を示し、第１図は本発
明の柱頭部構造の平面図、第２図は第１図の−
線断面図、第３図は第１図の−折線断面
図、第４図は同上構造の斜視図である。
１……柱、２……フラツトスラブ、３……プレ
キヤストコンクリート支版、４……フイーレンデ
イールタイプのトラス筋、５……テンドン。
The drawings show one embodiment of the present invention, FIG. 1 is a plan view of the column head structure of the present invention, and FIG.
FIG. 3 is a cross-sectional view taken along the line -- of FIG. 1, and FIG. 4 is a perspective view of the same structure. 1...Column, 2...Flat slab, 3...Precast concrete support slab, 4...Vierendeel type truss bar, 5...Tendon.
Claims (1)
断耐力を柱頭部の支版で補強するフラツトスラブ
の柱頭部構造において、前記支版を、フイーレン
デイールタイプのトラス筋の下半部を埋込み、柱
軸心を中心として放射状に配置した所定厚のプレ
キヤスト支版で構成し、該支版の下面とフラツト
スラブ下面とを同一面にし前記トラス筋の上半部
をスラブコンクリートに埋込むようスラブコンク
リートが打設してあると共に、前記フイーレンデ
イールタイプのトラス筋は、前記フラツトスラブ
に配筋された縦横二方向のテンドンに夫々平行す
る直交二方向のものは、夫々前記プレキヤストコ
ンクリート版上面からの突出高さがテンドンの湾
曲頂部より高く、かく支版外縁から柱面に届く長
さを有し、縦横二方向のテンドンに斜交する方向
のトラス筋は、夫々テンドンの配筋を妨害しない
程度の支版上面からの突出高さと、支版外縁から
始まり柱面より適宜離隔した長さを有することを
特徴とするフラツトスラブの柱頭部構造。1. In a flat slab column head structure in which the shear strength of a prestressed concrete slab is reinforced with a support plate at the column head, the support plate is embedded in the lower half of a Vielendeel type truss bar, and the column center is centered on the column axis. Consisting of precast support plates of a predetermined thickness arranged radially, slab concrete is placed so that the lower surface of the support plates and the lower surface of the flat slab are flush with each other, and the upper half of the truss bars is embedded in the slab concrete. , the Vierendeihl type truss reinforcements are arranged in two orthogonal directions parallel to the longitudinal and lateral tendons arranged on the flat slab, and the protrusion height from the top surface of the precast concrete plate corresponds to the curvature of the tendon. The truss reinforcements, which are higher than the top and have a length that reaches from the outer edge of the support plate to the column surface, and which are diagonal to the tendons in both vertical and horizontal directions, should protrude from the top surface of the support plate to the extent that they do not interfere with the reinforcement of the tendons. A column head structure of a flat slab characterized by having a height and a length that starts from the outer edge of the support plate and is appropriately spaced from the column surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11385487A JPS63280143A (en) | 1987-05-11 | 1987-05-11 | Capital part structure of flat slab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11385487A JPS63280143A (en) | 1987-05-11 | 1987-05-11 | Capital part structure of flat slab |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63280143A JPS63280143A (en) | 1988-11-17 |
| JPH0572492B2 true JPH0572492B2 (en) | 1993-10-12 |
Family
ID=14622737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11385487A Granted JPS63280143A (en) | 1987-05-11 | 1987-05-11 | Capital part structure of flat slab |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63280143A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050021611A (en) * | 2003-08-19 | 2005-03-07 | 송진규 | Apparatus for enhancing shear strength of column slab connection part and structure thereof using the same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5027312A (en) * | 1973-07-12 | 1975-03-20 | ||
| JPS57193652A (en) * | 1981-05-23 | 1982-11-29 | Takenaka Komuten Co | Precast concrete plate equipped with three-dimentional truss |
| JPS5856261U (en) * | 1981-10-14 | 1983-04-16 | 境 安貞 | Overflow prevention automatic shutoff valve device |
| JPS58153844A (en) * | 1982-03-09 | 1983-09-13 | 株式会社竹中工務店 | Execution of prestressed concrete synthetic floor plate |
| JPS60238553A (en) * | 1984-05-11 | 1985-11-27 | 鹿島建設株式会社 | Flat slab structure |
-
1987
- 1987-05-11 JP JP11385487A patent/JPS63280143A/en active Granted
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5027312A (en) * | 1973-07-12 | 1975-03-20 | ||
| JPS57193652A (en) * | 1981-05-23 | 1982-11-29 | Takenaka Komuten Co | Precast concrete plate equipped with three-dimentional truss |
| JPS5856261U (en) * | 1981-10-14 | 1983-04-16 | 境 安貞 | Overflow prevention automatic shutoff valve device |
| JPS58153844A (en) * | 1982-03-09 | 1983-09-13 | 株式会社竹中工務店 | Execution of prestressed concrete synthetic floor plate |
| JPS60238553A (en) * | 1984-05-11 | 1985-11-27 | 鹿島建設株式会社 | Flat slab structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63280143A (en) | 1988-11-17 |
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