JPH08402Y2 - Steel column base hardware - Google Patents

Steel column base hardware

Info

Publication number
JPH08402Y2
JPH08402Y2 JP1993030715U JP3071593U JPH08402Y2 JP H08402 Y2 JPH08402 Y2 JP H08402Y2 JP 1993030715 U JP1993030715 U JP 1993030715U JP 3071593 U JP3071593 U JP 3071593U JP H08402 Y2 JPH08402 Y2 JP H08402Y2
Authority
JP
Japan
Prior art keywords
column base
mortar
anchor bolt
column
concrete
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
Application number
JP1993030715U
Other languages
Japanese (ja)
Other versions
JPH066504U (en
Inventor
英成 松尾
邦昭 佐藤
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.)
Kajima Corp
Hitachi Metals Ltd
Original Assignee
Kajima Corp
Hitachi Metals Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kajima Corp, Hitachi Metals Ltd filed Critical Kajima Corp
Priority to JP1993030715U priority Critical patent/JPH08402Y2/en
Publication of JPH066504U publication Critical patent/JPH066504U/en
Application granted granted Critical
Publication of JPH08402Y2 publication Critical patent/JPH08402Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Description

【考案の詳細な説明】[Detailed description of the device]

【0001】[0001]

【産業上の利用分野】本考案は、鉄骨造または鉄骨鉄筋
コンクリート造建築物に用いる鉄骨柱脚金物に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel column pedestal used for a steel structure or a steel reinforced concrete building.

【0002】[0002]

【従来の技術】図2(a)、(b)に示す従来の鉄骨柱
脚は、柱脚部に作用するせん断力に対し、抵抗力を確保
する方法として二つの方法がある。第1の方法は、図2
(a)に示すように、柱脚部に発生する柱3の軸力Nと
曲げモーメントMによって発生する基礎コンクリート
(以下単にコンクリートといい、各図の断面はハッチン
グを省略する)5の圧縮反力Ncの柱脚金物1の底面と
の間の摩擦力μNcで確保する方法である。
2. Description of the Related Art In the conventional steel column base shown in FIGS. 2A and 2B, there are two methods for securing resistance against the shearing force acting on the column base. The first method is shown in FIG.
As shown in (a), the compression reaction of the basic concrete (hereinafter simply referred to as concrete, hatching is omitted in each figure) 5 generated by the axial force N and the bending moment M of the column 3 generated in the column base portion 5 This is a method of ensuring the frictional force μNc between the bottom of the pillar pedestal 1 and the force Nc.

【0003】また第2の方法は、前記摩擦効果に加えて
図2(b)に示すように、柱脚金物1のアンカーボルト
穴とアンカーボルト2との間隙にモルタル4等を注入
し、柱3側から伝達されるせん断力Qを柱脚金物1、さ
らに柱脚金物1のアンカーボルト穴とアンカーボルト2
の間隙に注入されたモルタル4等を介してアンカーボル
ト2に伝達し、アンカーボルト2によってせん断抵抗力
を確保するものである。
In the second method, in addition to the above-mentioned friction effect, as shown in FIG. 2 (b), mortar 4 or the like is injected into the gap between the anchor bolt hole and the anchor bolt 2 of the column base metal fitting 1 to form a column. The shearing force Q transmitted from the 3 side is the column base metal fitting 1, and the anchor bolt holes and anchor bolts 2 of the column base metal fitting 1
It is transmitted to the anchor bolt 2 via the mortar 4 and the like injected into the gap, and the anchor bolt 2 secures shear resistance.

【0004】[0004]

【考案が解決しようとする課題】ところがこれらの方法
は、いずれも建物の条件によっては、柱脚部に作用する
せん断力に抵抗できるだけの大きなせん断抵抗力を確保
することができないという問題点がある。
However, all of these methods have a problem that depending on the building conditions, it is not possible to secure a large shear resistance force capable of resisting the shear force acting on the column base. .

【0005】すなわち、第1の方法の柱脚部のコンクリ
ート5の圧縮反力Ncの柱脚底面との摩擦力μNcによ
ってせん断抵抗力を確保する方法では、図3(a)に示
すように、建物6の外周部にある外柱3a、または図3
(b)に示すような間口が狭く高さの高い建物6の柱3
bでは、地震時等に柱脚部に大きな引抜力Tが働き、図
4に示すように柱脚部に作用する曲げモーメントMによ
るコンクリート5の圧縮反力Ncを、引抜側の軸力Nが
打ち消し、コンクリート5に圧縮反力Ncが作用しない
場合がある。この場合、コンクリート5の圧縮反力Nc
が0(ゼロ)となるので、柱脚金物1の底面1aとコン
クリート上面5aとの摩擦力μNcを期待できず、柱脚
に作用するせん断力Qに対する抵抗力を確保できない。
That is, in the first method of securing the shear resistance force by the frictional force μNc of the compression reaction force Nc of the concrete 5 of the column base with the bottom face of the column base, as shown in FIG. 3 (a), The outer pillar 3a on the outer periphery of the building 6, or FIG.
Pillar 3 of building 6 with narrow frontage and high height as shown in (b)
In b, a large pull-out force T acts on the column base at the time of an earthquake or the like, and as shown in FIG. 4, the compression reaction force Nc of the concrete 5 due to the bending moment M acting on the column base is changed to the axial force N on the pull-out side. In some cases, the compression reaction force Nc does not act on the concrete 5 by canceling it. In this case, the compression reaction force Nc of the concrete 5
Is 0 (zero), the frictional force μNc between the bottom surface 1a of the column base metal 1 and the concrete upper surface 5a cannot be expected, and the resistance force against the shearing force Q acting on the column base cannot be secured.

【0006】また第2の方法は、前述のように、柱脚金
物1のアンカーボルト穴とアンカーボルト2との間隙に
モルタルを注入し、柱側から伝達されるせん断力Qを柱
脚金物1、さらに柱脚金物1のアンカーボルト穴とアン
カーボルト2との間隙にあるモルタル4等を介してアン
カーボルト2に伝達し、アンカーボルト2によってせん
断抵抗力を確保するものである。ところがこの方法も、
図5に示すように、主に柱脚金物1の端部から注入され
るモルタル4を、ボルト穴とアンカーボルト2との間隙
に完全に封入することが施工的に非常に難しく、実際の
建築物においては、せん断抵抗力を確保できない場合が
ある。 従ってこの方法は、建築物の安全性確保という
点で問題を有している。
In the second method, as described above, mortar is injected into the gap between the anchor bolt hole of the column base metal 1 and the anchor bolt 2, and the shearing force Q transmitted from the column side is applied to the column base metal 1. Further, it is transmitted to the anchor bolt 2 through the mortar 4 or the like in the gap between the anchor bolt hole of the column base metal fitting 1 and the anchor bolt 2, and the shear resistance is secured by the anchor bolt 2. However, this method also
As shown in FIG. 5, it is extremely difficult in construction to completely enclose the mortar 4, which is mainly injected from the end of the column base metal fitting 1, in the gap between the bolt hole and the anchor bolt 2, which is an actual construction. In some cases, the shear resistance may not be secured. Therefore, this method has a problem in ensuring the safety of the building.

【0007】本考案は、これら従来の問題点を解決すべ
く、鉄骨造または鉄骨鉄筋コンクリート造建築物の柱脚
に、常に一定の安定したせん断抵抗力を確保することが
できる柱脚金物を提供するものである。
In order to solve these conventional problems, the present invention provides a column base metal member capable of always securing a constant and stable shear resistance force to a column base of a steel frame structure or a steel frame reinforced concrete structure. It is a thing.

【0008】[0008]

【課題を解決するための手段及び実施例】本考案の柱脚
金物7は、実施例を示す図1のように、柱3に固着する
底板7dの底面7fに十字状の底面側突出部7aを設
け、その一条の長さDをアンカーボルトの直径の4.5
倍以上、突出長さhを0.45倍以上とし、かつ底板7
dの十字で仕切られた各区域にはアンカーボルト穴7e
とモルタル注入口7bとモルタル排出口7cとを設け、
鋳造または鍛造または鋼材の組立てにてなる鉄骨柱脚金
物である。この場合、底板7dの外周側はモルタル用の
型枠(図示せず)により囲まれているので、十字状の底
面側突出部7aと型枠との間でモルタルが充満される。
As shown in FIG. 1 showing an embodiment, a column base metal fitting 7 of the present invention has a cross-shaped bottom side projection 7a on a bottom surface 7f of a bottom plate 7d fixed to the column 3. And the length D of the line is 4.5 of the anchor bolt diameter.
More than twice, the protruding length h is 0.45 times or more, and the bottom plate 7
Anchor bolt hole 7e in each area divided by the cross of d
And a mortar inlet 7b and a mortar outlet 7c,
It is a steel column pillar metal fitting made by casting, forging, or assembling steel. In this case, since the outer peripheral side of the bottom plate 7d is surrounded by a mold (not shown) for mortar, the mortar is filled between the cross-shaped bottom surface side protruding portion 7a and the mold.

【0009】[0009]

【作用】図1に示す本考案実施例鉄骨柱脚金物を用い、
図5に示す従来の柱脚部を引用し、従来の柱脚金物1を
本考案の柱脚金物7に置き換えて、コンクリートと結合
する方法並びに手順を述べる。 (1)中心部モルタル5bにより形成され、柱脚金物7
の底面側突出部7aの中央部下面に密着するような部分
的な平面5aを有し、アンカーボルト2を埋設したコン
クリート5を製作する。 (2)コンクリート5の養生が終わった後、柱3に取り
付けた柱脚金物7をコンクリート5上に据え付け、アン
カーボルト2によって柱脚金物7を仮り締めする。 (3)柱脚金物7に設けたモルタル注入口7bよりモル
タル4を圧入し、モルタル排出口7cからモルタル4が
排出されたことを確認し、モルタル4の充填を完了す
る。 (4)モルタル4の養生後、アンカーボルト2の本締め
を行なう。本考案による柱脚金物7を使用して上記の手
順で施工を行なえば、柱脚金物7の底面7fおよび底面
側突出部7aの側面に完全に密着したコンクリート5を
確保できる。
[Operation] Using the steel column pillar metal fittings of the present invention shown in FIG.
Referring to the conventional column base shown in FIG. 5, the conventional column base metal 1 is replaced with the column base metal 7 of the present invention, and the method and procedure for connecting with concrete will be described. (1) A pedestal metal fitting 7 formed of a central mortar 5b
Concrete 5 in which the anchor bolt 2 is embedded and which has a partial flat surface 5a that comes into close contact with the lower surface of the central portion of the bottom surface side protruding portion 7a is manufactured. (2) After the curing of the concrete 5 is completed, the column base metal fitting 7 attached to the column 3 is installed on the concrete 5, and the column base metal structure 7 is temporarily tightened by the anchor bolt 2. (3) The mortar 4 is press-fitted from the mortar injection port 7b provided in the column base metal 7, and it is confirmed that the mortar 4 is discharged from the mortar discharge port 7c, and the filling of the mortar 4 is completed. (4) After curing the mortar 4, the anchor bolts 2 are fully tightened. If the construction is carried out by using the pillar pedestal 7 according to the present invention in the above-mentioned procedure, the concrete 5 completely adhered to the bottom surface 7f of the pedestal metal fitting 7 and the side surface of the bottom surface side protruding portion 7a can be secured.

【0010】そして従来の第1の方法による問題点であ
った、軸力Nが引抜側に作用してコンクリート5の圧縮
反力Ncが0(ゼロ)の場合でも、柱脚部に作用するせ
ん断力Qに対する抵抗力を確保できる。 すなわち、柱
3から伝達されるせん断力Qは、柱脚金物7の底面側突
出部7aを介してコンクリート5に伝達できる。
Even when the compressive reaction force Nc of the concrete 5 is 0 (zero) due to the axial force N acting on the pull-out side, which is a problem with the first conventional method, the shear acting on the column base is generated. The resistance to the force Q can be secured. That is, the shearing force Q transmitted from the column 3 can be transmitted to the concrete 5 via the bottom surface side protrusion 7 a of the column base metal 7.

【0011】また従来の第2の方法による問題点、すな
わちモルタルが柱脚金物のアンカーボルト穴との間隙に
完全に充填されず、せん断抵抗力を確保できないという
問題点も同様の理由で解消できる。
The problem with the second conventional method, that is, the problem that the mortar is not completely filled in the gap between the stud and the anchor bolt hole and the shear resistance cannot be secured, can be solved for the same reason. .

【0012】なお、柱脚金物7の底面側突出部7aの一
条の長さD(図1参照)をアンカーボルト2の直径d
(図5参照)の4.5倍以上とした理由は以下のとおり
である。図2(b)の従来の柱脚部においては、アンカ
ーボルト穴に充填されたモルタル4の許容圧縮力から柱
脚部のせん断抵抗力Qcが数1により決まる。
It should be noted that the length D (see FIG. 1) of one line of the bottom projection 7a of the column base metal fitting 7 is defined as the diameter d of the anchor bolt 2.
The reason why it is 4.5 times or more (see FIG. 5) is as follows. In the conventional column base portion of FIG. 2B, the shear resistance force Qc of the column base portion is determined by the equation 1 from the allowable compression force of the mortar 4 filled in the anchor bolt holes.

【0013】[0013]

【数1】 [Equation 1]

【0014】ただし d :アンカーボルトの直径 t :柱脚金物の底板の厚み n :コンクリートの圧縮側に配置されたボルトの本数 Fc:コンクリートの基準強度Where d is the diameter of the anchor bolt, t is the thickness of the bottom plate of the column pedestal, n is the number of bolts arranged on the compression side of concrete, and Fc is the standard strength of concrete.

【0015】本考案による柱脚金物7を用いた場合の理
論的な柱脚部のせん断抵抗力Qcは、数3および数5の
いずれか小さい方の値となる。
The theoretical shear resistance Qc of the column base portion when the column base metal member 7 according to the present invention is used is the smaller value of the equations 3 and 5.

【0016】[0016]

【数2】 [Equation 2]

【0017】せん断抵抗力は数2を考慮すれば数3とな
る。また、支圧抵抗力は数4を考慮すれば数5となる。
The shear resistance is given by equation 3 when equation 2 is taken into consideration. Further, the bearing resistance is given by equation 5 when equation 4 is taken into consideration.

【0018】[0018]

【数3】 (Equation 3)

【0019】[0019]

【数4】 [Equation 4]

【0020】[0020]

【数5】 (Equation 5)

【0021】ただし D :柱脚金物の底面側突出部の
一条の長さ h :柱脚金物の底面側突出部の突出長さ t0 :柱脚金物の底面側突出部の厚み
However, D: the length of a line of the protrusion on the bottom side of the column base metal fitting h: the length of the protrusion of the bottom side projection of the column base metal structure t 0 : the thickness of the bottom side protrusion of the column base metal structure

【0022】従って、本考案によるせん断抵抗力Qcを
従来のそれと同等以上確保するためには、数6の条件が
必要である。
Therefore, in order to secure the shear resistance Qc of the present invention equal to or more than that of the conventional one, the condition of the equation 6 is necessary.

【0023】[0023]

【数6】 (Equation 6)

【0024】ここで、数1において、従来の一般式の柱
脚金物1における下限の条件 t≒d,n=2を考慮す
ると、数6の上方側の式より数7の上方側の式の不等式
が、数6の下方側の式より数7の下方側の式の不等式が
それぞれ成立する。
In consideration of the lower limit condition t≈d, n = 2 in the column base metal fitting 1 of the conventional general formula in the formula 1, the upper formula of the formula 7 is more than the upper formula of the formula 6. As for the inequality, the inequality of the equation on the lower side of the equation 7 is satisfied than that of the equation on the lower side of the equation 6.

【0025】[0025]

【数7】 (Equation 7)

【0026】すなわち、底面側突出部7aの一条の長さ
Dが、アンカーボルト2の直径dの4.5倍以上、また
その突出長さhがアンカーボルト2の直径dの0.45
倍以上ある本考案による柱脚金物7を使用すれば、いか
なる条件下の柱脚部でも、常に従来と同等以上のせん断
抵抗力Qcを確保することができる。
That is, the length D of one line of the bottom side protruding portion 7a is at least 4.5 times the diameter d of the anchor bolt 2, and the protruding length h is 0.45 of the diameter d of the anchor bolt 2.
By using the pedestal metal fitting 7 according to the present invention, which is more than twice as long, it is possible to always secure the shear resistance Qc equal to or more than the conventional one in the pedestal portion under any condition.

【0027】またさらに、本考案による柱脚金物7を使
用すれば、コンクリート5と柱脚金物7の底面7fとの
密着が完全となるので、柱脚部の大きな性能の一つであ
る回転剛性M/θ(図2(a)参照、M:柱脚部に発生
する曲げモーメント、θ:柱脚の回転角)を高くするこ
とができる(コンクリート5と柱脚金物7の密着は回転
剛性を高める上での大きな要素である)。これは、上部
架構の部材サイズを小さくすることができることにつな
がり、建築物の原価低減を可能にするものである。
Furthermore, if the column base metal fitting 7 according to the present invention is used, the concrete 5 and the bottom surface 7f of the column base metal fitting 7 are completely adhered to each other, so that the rotation rigidity which is one of the great performances of the column base metal part. M / θ (see FIG. 2 (a), M: bending moment generated in the column base, θ: rotation angle of the column base) can be increased (contact between concrete 5 and column base metal fitting 7 provides rotational rigidity). Is a big factor in raising). This leads to a reduction in the member size of the upper frame, and enables cost reduction of the building.

【0028】[0028]

【考案の効果】本考案の効果としては、以下の2点が挙
げられる。 (1)いかなる条件下の建物においても、常に一定のし
かも従来と同等以上のせん断抵抗力を保有する柱脚を確
保できる。 (2)柱脚金物底面とコンクリートの密着が完全に行な
われるので、高い回転剛性を有する柱脚が確保でき、建
物の上部架構部材の小型化による原価低減が可能であ
る。
The effects of the present invention include the following two points. (1) In a building under any condition, it is possible to secure a column base that always has a constant shear resistance that is equal to or higher than the conventional one. (2) Column base Since the bottom surface of the metal fitting and the concrete are completely adhered to each other, a column base having high rotational rigidity can be secured, and the cost can be reduced by downsizing the upper frame member of the building.

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

【図1】(a)および(b)は各々本考案の実施例を示
す正面図および底面図である。
1A and 1B are respectively a front view and a bottom view showing an embodiment of the present invention.

【図2】(a)および(b)は従来の柱脚部を示す断面
図である。
2A and 2B are cross-sectional views showing a conventional column base portion.

【図3】(a)および(b)は建物の柱に引抜力が作用
した状態を示す説明図である。
3A and 3B are explanatory views showing a state in which a pulling force is applied to a pillar of a building.

【図4】従来の柱脚部の例を示す断面図である。FIG. 4 is a sectional view showing an example of a conventional column base portion.

【図5】従来の柱脚部の例を示す断面図である。FIG. 5 is a cross-sectional view showing an example of a conventional column base portion.

【符号の説明】[Explanation of symbols]

1 柱脚金物 1a 底面 2 アンカーボルト 3 柱 3a 柱 3b 柱 4 モルタル 5 基礎コンクリート 5a 基礎コンクリート上面 5b 中心部モルタル 6 建物 7 柱脚金物 7a 底面側突出部 7b モルタル注入口 7c モルタル排出口 7d 底板 7e アンカーボルト穴 7f 底面 D 柱脚金物底面側突出部の一条の長さ d アンカーボルトの直径 h 柱脚金物底面側突出部の突出長さ t0 柱脚金物底面側突出部の厚み M 曲げモーメント N 軸力 NC 圧縮反力 μNC 摩擦力 Q せん断力 T 引抜力 θ 柱脚の回転角1 Column Base Metal 1a Bottom 2 Anchor Bolt 3 Column 3a Column 3b Column 4 Mortar 5 Foundation Concrete 5a Foundation Concrete Top 5b Center Mortar 6 Building 7 Column Base Metal 7a Bottom Side Projection 7b Mortar Inlet 7c Mortar Outlet 7e Bottom Plate Anchor bolt hole 7f Bottom surface D Length of a row of protrusions on the bottom side of column pedestal d Diameter of anchor bolt h Length of protrusion of bottom side protrusion of column pedestal metal t 0 Thickness of bottom side protrusion of column pedestal metal M Bending moment N rotation angle of the axial force N C compression reaction force [mu] N C frictional force Q shearing force T pullout force θ column base

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭60−258345(JP,A) 実開 昭58−100903(JP,U) 特公 昭52−44133(JP,B2) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-60-258345 (JP, A) Sekikai-Sho 58-100903 (JP, U) JP-B-52-44133 (JP, B2)

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】 底板の底面に十字状の底面側突出部を設
け、その一条の長さをアンカーボルトの直径の4.5倍
以上、突出長さを0.45倍以上とすることにより柱か
ら伝達される剪断力に対抗する抵抗力を確保すると共
モルタルの充填を確実容易にし、柱脚金物と基礎コ
ンクリートとの完全密着により、高い回転剛性を図るた
底板の十字で仕切られた各区域にアンカーボルト穴と
モルタル注入口とモルタル排出口とを設け、鋳造または
鍛造または鋼材の組立てにてなることを特徴とする鉄骨
柱脚金物。
1. A pillar is provided by providing a cross-shaped bottom surface side protruding portion on the bottom surface of the bottom plate, and the length of one of the protrusions is 4.5 times or more the diameter of the anchor bolt and 0.45 times or more the protruding length. Or
It is necessary to secure the resistance force against the shear force transmitted from the
In addition, it facilitates the filling of mortar easily,
Achieves high rotational rigidity by fully adhering to the inner cleat.
Steel column base hardware, characterized in that the anchor bolt hole and mortar inlet and mortar outlet provided in each area partitioned by the cross of fit bottom plate, made at the assembly of casting or forging or steel.
JP1993030715U 1993-06-08 1993-06-08 Steel column base hardware Expired - Lifetime JPH08402Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1993030715U JPH08402Y2 (en) 1993-06-08 1993-06-08 Steel column base hardware

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1993030715U JPH08402Y2 (en) 1993-06-08 1993-06-08 Steel column base hardware

Publications (2)

Publication Number Publication Date
JPH066504U JPH066504U (en) 1994-01-28
JPH08402Y2 true JPH08402Y2 (en) 1996-01-10

Family

ID=12311347

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1993030715U Expired - Lifetime JPH08402Y2 (en) 1993-06-08 1993-06-08 Steel column base hardware

Country Status (1)

Country Link
JP (1) JPH08402Y2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101366054B1 (en) * 2012-05-08 2014-02-27 문지은 Pc block construction method for architecture foundation

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5244133A (en) * 1975-10-06 1977-04-06 Nec Corp Microprogram control system
JPS58100903U (en) * 1981-12-28 1983-07-09 旭化成株式会社 Pillar base hardware

Also Published As

Publication number Publication date
JPH066504U (en) 1994-01-28

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