WO2008004754A1

WO2008004754A1 - Prefabricated pillar

Info

Publication number: WO2008004754A1
Application number: PCT/KR2007/002273
Authority: WO
Inventors: Heesung Jang
Original assignee: Heesung Jang
Priority date: 2006-07-04
Filing date: 2007-05-09
Publication date: 2008-01-10

Abstract

This is an invention about the prefabricated pillars of buildings. Pillars generally used in modern buildings are concrete pillars, reinforced concrete pillars, and steel framed reinforced concrete pillars. Reinforced pillars and steel framed reinforced concrete pillars are characterized by concrete stiffeners like a reinforcing rod or a steel frame. In order to manufacture such pillars, reinforcing rods or steel frames should first be placed properly, and then making molds around them, pouring concretes, curing concretes, removing molds should be done accordingly. This process, however, multiplies the work at the site and takes long time to cure the concrete. This invention of a prefabricated pillar is presented to make up for such demerits where the frame of a building(pillar and beam) can be completed only by assembling the prefabricated pillars and beams (H-beam) at the construction site. This invention of a prefabricated pillar generally is a square concrete pillar or a reinforced concrete pillar. There is an upper pillar connector(30) at the upper part of pillar and a lower pillar connector(40) at the lower part of pillar to combine prefabricated pillars vertically, and there is a beam connector(50) to combine a beam(70) with the pillar.

Description

Description PREFABRICATED PILLAR

Technical Field

[ 1 ] pillar of a building

Background Art

[2] This is an invention about a concrete pillar or a reinforced concrete pillar of building. The existing technology in this field is as follows.

[3] When erecting a reinforced concrete pillar in the construction process, reinforcing rods are first installed in the place to erect the pillar, mold is made around, concrete is poured and cured, and when it is dried, the molds are removed to complete the pillar.

Disclosure of Invention

Technical Problem

[4] Because the manufacturing methed of concrete pillar or reinforced concrete pillar mentioned above need the pillars to be made and concrete to be cured on site, the site requires a lot of manpower, and it takes a long time for the concrete to be cured. Technical Solution

[5] This invention can reduce the manpower needed and the construction time because pillars prefabricated at the factory are transferred to the construction site, and the pillars and the beams(usually in the form of letter H)are just put together to complete the frame of the building(pillar and beam).

Advantageous Effects

[6] 1) There is no need to make pillars at the construction site when using the prefabricated pillars. The beams should just be transported to the construction site and assembled. So it's possible to reduce manpower on site and reduce the construction time.

[7] 2) Pillars are manufactured by using machinery at factories. Compared to erecting pillars at the construction site with lots of manpower, it is possible to improve the quality of the pillars and lower the unit cost of manufacturing.

[8] 3) As pillars and beams are assembled, it is easy to remodel or deconstruct a bulding. It is even possible to recycle the pillars when deconstructing. Brief Description of the Drawings

[9] Drawing 1 is the squint drawing of a beam connected to a two-step prefabricated pillar using the type 1 connector.

[10] Drawing 2 is the squint drawing of type 1 connector.

[11] Drawing 3 is the squint drawing of a two-step prefaricated pillar using the type 1 connector. [12] Drawing 4 is the squint drawing of a vertically connected two-step prefabricated pillars using type 1 connector.

[13] Drawing 5 is the squint drawing of three beams connected to two two-step prefabricated pillars using type 1 connector connected vertically.

[14] Drawing 6 is the squint drawing of a one- step prefabricated pillar using type 1 connector.

[15] Drawing 7 is the squint drawing of a vertically connected two one-step prefabricated pillars using type 1 connector.

[16] Drawing 8 is the squint drawing of a beam connected to two one-step prefabricated pillars using type 1 connector connected vertically.

[17] Drawing 9 is the squint drawing of type 2 connector.

[18] Drawing 10 is the squint drawing of a two-step prefabricated pillar using type 2 connector.

[19] Drawing 11 is the squint drawing of three beams connected to two two-step prefabricated pillars using type 2 connector connected vertically.

[20] Drawing 12 is the squint drawing of type 3 connector.

[21] Drawing 13 is the squint drawing of a two-step prefabricated pillar using type 3 connector.

[22] Drawing 14 is the squint drawing of three beams connected to two two-step prefabricated pillars using type 3 connector connected vertically.

[23] Drawing 15 is the squint drawing of type 4 connector.

[24] Drawing 16 is the squint drawing of a two-step prefabricated pillar using type 4 connector.

[25] Drawing 17 is the squint drawing of three beams connected to two two-step prefabricated pillars using type 4 connector connected vertically.

[26] Drawing 18 is the squint drawing of type 5 connector.

[27] Drawing 19 is the squint drawing of a two-step prefabricated pillar using type 5 connector.

[28] Drawing 20 is the squint drawing of three beams connected to two-step prefabricated pillars using type 5 connector connected vertically.

[29] Drawing 21 is the squint drawing of type 6 connector.

[30] Drawing 22 is the squint drawing of type 7 connector.

[31] Drawing 23 is the squint drawing of type 1-3 connector(Transformation of type 1 connector into a connector where three beams can be connected)

[32] Drawing 24 is the the squint drawing of type 1-2 connector(Transformation of type

1 connector where two beams can be connected).

[33] Drawing 25 is the squint drawing of type l-2a connector(Type 1-2 connector transformed to be used only as a beam connector). [34] Drawing 26 is the squint drawing of a two-step prefabricated pillar using 1-2 and type 1 -2a connector. [35] Drawing 27 is the squint drawing of two vertically connected two-step prefabricated pillars using type 1-2 and type l-2a connector. [36] Drawing 28 is the squint drawing of two beams connected to two vertically connected two-step prefabricated pillars using type 1-2 and type l-2a connector. [37] Drawing 29 is the squint drawing of a beam.

[38] Drawing 30 is the squint drawing of a beam where a bolt insertion hole is made to fit the type 5 connector.

[39] Drawing 31 is the squint drawing of a type 1 vertical connecting bar.

[40] Drawing 32 is the squing drawing of a type 2 vertical connecting bar(Used for the two-step prefabricated pillar, with three bolt insertion holes). [41] Drawing 33 is the squint drawing of the frame of the two-step prefabricated pillar that is made by welding four type 1 vertical connecting bar and three type 3 connectors (Frame of the prefabricated pillars refer to the parts except the pillar body of the prefabricated pillar. It is the frame which the upper pillar connector, lower pillar connector, and the beam connector are connected to the vertical connecting bar). [42] Drawing 34 is the squint drawing of a two-step prefabricated pillar using type 1 vertical connecting bar and type 3 connector. [43] Drawing 35 is the squint drawing of the frame of a two-step prefabricated pillar that is made by welding four type 1 vertical connecting bars and three type 4 connectors. [44] Drawing 36 is the squint drawing of two-step prefabricated pillar using type 1 vertical connecting bar and type 4 connector. [45] Drawing 37 is the squint drawing of the frame of a two-step prefabrecated pillar where four type 2 vertical connecting bars and three type 6 connectors are joined with bolts and nuts. [46] Drawing 38 is the squint drawing of a two-step prefabicated pillar using type 2 vertical connecting bar and type 6 connector. [47] Drawing 39 is the squint drawing of the frame of a two-step prefabricated pillar where four type 2 vertical connecting bars and three type 7 connectors are joined with bolts and nuts. [48] Drawing 40 is the squint drawing of a two-step prefabricated pillar using type 2 vertically connecting the bar and type 7 connector. [49]

[50] (Description of signs in the main part of drawing)

[51] 30: Upper pillar connector.

[52] 40: Lower pillar connector.

[53] 50: Beam connector. [54] 60: Pillar body

[55] 70: Beam.

[56] 75; Added steel plate that connects the beam to type 5 connector.

[57] 81: Bolt insertion hole made on type 1 connector.

[58] 82: Bolt insertion hole made on type 2 connector.

[59] 83: Bolt insertion hole made on type 3 connector.

[60] 84: Bolt insertion hole made on type 4 connector.

[61] 85: Bolt insertion hole made on type 5 connector.

[62] 86: Bolt insertion hole on type 6 connector, which is to be connected with the vertical connecting bar(The hole is penetrated horizontally). [63] 87: Bolt insertion hole on type 7 connector, which is to be connected with vertical connectinb bar(The hole is penetrated horiontally). [64] 91: Bolt insertion hole made on both ends of the beam.

[65] 92: Bolt insertion hole made on the beam to fit type 5 connector.

[66] 95: Vertical connecting bar.

[67] 95a: Bolt insertion hole made on type 2 veritcal connecting bar(Bolt insertion hole, where type 2 vertical connecting bar and the connector is joined, is penetrated horizontally).

[68] 101 : Prefabricated pillar on the upper part.

[69] 102: Prefabricated pillar on the lower part.

Best Mode for Carrying Out the Invention [70] Generally in the case of concrete pillars or reinforced concrete pillars, it is hard to enlarge the height of the pillar, as the pillar is fixed to the floor of the building and the pillar is an one body(unity). [71] [72] The prefabricated pillar, however, is manufactured as an independent unit, so mobility is allowed. The height of the pillar can be enlarged by connecting pillars vertically, and the beams and the pillars can be connected by assembling. [73] [74] The prefabricated pillar has an inter-pillar connector both on the upper and lower part of the pillar to connect pillars vertically, as well as beam-pillar connector at the point where the beam and the pillar joins. [75] [76] The equipment, which connects pillar vertically, that is located on the upper pillar and connects the upper part of the pillar to the lower part of another pillar, is called the

'upper pillar connector'(30). [77] [78] The equipment, which connects pillar vertically, that is located on the lower pillar and connects the lower part of the pillar to the upper part of another pillar, is called the 'lower pillar connector' (40).

[79]

[80] The equipment that connects beams to pillars is called the 'beam connector'(50).

[81]

[82] The other parts of the prefabricated pillar that are made of concrete or reinforced concrete and fix the upper pillar connector, the lower pillar connector, the beam connector to the pillar, and combine all of these connectors to make the whole pillar a lump and support the load of the building, is called the 'pillar body'(60).

[83]

[84] However, the upper pillar connector or the lower pillar connector may play the role of connecting the upper or the lower part of a pillar to another pillar, as well as the role of the beam connector that connects beams to pillars.

[85]

[86] As explained above, the prefabricated pillar is classified into the pillar body and three kinds of connectors: the upper pillar connector, the lower pillar connector, and the beam connector. There is also an auxiliary equipment of the vertical connecting bar(95) that vertically connects the upper pillar connector, the beam connector, the lower pillar connector to reinforce the prefabricated pillar.

[87]

[88] Below are explanations of the connectors and the pillar body, the beam, the inter- pillar connection, the pillar-beam connection, and the vertical connecting bar.

[89]

[90] First, the connector serves to connecting prefabricated pillars to another pillar or a beam. Part of the connector is stuck to pillar body to fix the connector to pillar, and another part of the connector is protruded from the pillar body, And using this protruded part, it is possible to connect a pillar to a pillar, or a pillar to a beam.

[91] Various types of connector may be proper for these functions. However there are 7 typical types of connectors explained below based on drawings.

[92]

[93] 1. Type 1 connetor(Drawing 2)

[94] Type 1 connector is a plank made of metal or plastic with a pattern of mathematical sign of plus( + ). There are plural holes(81) along the edge penetrating the plank vertically.

[95] Type 1 connector is the kind that can be used by either the upper pillar connector, the lower pillar connector or the beam connector, depending on its position when connected to the pillar, [96] Since beams can be connected when the connecter is used for the upper pillar connector or the lower pillar connector, it plays the role of both the upper pillar connector and the beam connector, and the lower pillar connector and the beam connector.

[97]

[98] When connecting type 1 connector to the body of a prefabricated pillar, the central part of the connector is connected to the pillar body, and the four places having holes along the edge are protruded from the pillar body.

[99] When placing two prefabricated pillars that use type 1 connector to connect vertically, the lower pillar connector of the upper pillar and the upper pillar connector of the lower pillar come in contact with each other. Here prefabricated pillars can be connected upwards and downwards by adjusting the vertical holes (81) of both connectors to each other and by inserting bolts and fastening with nuts.

[100]

[101] When connecting a beam(70) to the prefabricated pillar that uses type 1 connector, connection is performed by putting one end of the beam on type 1 connector, adjusting bolt insertion holes made vertically in both connector and beam to each other, and inserting bolts and fastening with nuts.

[102]

[103] 2. Type 2 connector(Drawing 9)

[104] Type 2 connector is a structure made of metal or plastics in the pattern of musical sign of sharp(# ).

[105] When connecting type 2 connector to the body of the prefabricated pillar, the central part of the connector is connected to the pillar body and the bars on the edge are protruded from the pillar body. Here pillar-pillar or pillar-beam connection is performed by using the protruded bars and vertically made plural holes (82) made on bars.

[106]

[107] Pillar-pillar or pillar-beam connection using type 2 connector is the same as that using type 1 connector, so details shall be omitted.

[108]

[109] 3. Type 3 connector(Drawing 12)

[110] Type 3 connector is similar to, but strengthens, type 2 connector by combining each bars on the edge.

[I l l] The role and the use of type 3 connector is the same as that of type 1 connector, so details shall be omitted.

[112]

[113] 4. Type 4 connector(Drawing 15) [114] Type 4 connector looks like a quadrangle made of bars, with two bars protruding out of each four sides. Plural holes are made and penetrated vertically through the protruded bars.

[115] The role and the use of type 4 connector is the same as that of type 1 connector, so details shall be omitted.

[116]

[117] 5. Type 5 connector(Drawing 18)

[118] Type 5 connector uses H-beams as a connector.

[119] A H-beam in proper length is combined to the pillar body to be used as the upper pillar connector, the lower pillar connector or the beam connector.

[120] When connecting type 5 connector to the pillar body, some parts of the connector are protruded from the pillar body, and plural holes(85) are made and penetrated vertically through the protruded beam. Vertical connection of pillar-pillar or beam- pillar connection is performed by using these holes.

[121]

[122] Vertical connection of pillars using type 5 connector is the same as that of using type 1 connector.

[123] And beam-pillar connection using type 5 connector is the same as general connection between H-beams. So details shall be omitted.

[124]

[125] 6. Type 6 connector(Drawing 21)

[126] Type 6 connector has a bolt insertion holes(86) made through type 3 connector for connection with the vertical connecting bar. This connector is used when using type 2 vertical connecting bar as a stiffener for the prefabricated pillar.

[127]

[128] 7. Type 7 connector(Drawing 22)

[129] Type 7 connector has a bolt insertion holes(87) made through type 4 connector for the connection with the vertical connecting bar. This connector is used when using type 2 vertical connecting bar as a stiffener for the prefabricated pillar.

[130]

[131] Connectors above are composed so that four beams can basically be combined to a connector from all quarters (Except for type 5 connector that a beam must be connected to a connector).

[132]

[133] However, depending on the pillar, beams are connected to a pillar, not from all directions, but from two or three directions.

[134]

[135] Depending on the position of pillars, the pillar inside the building is generally connected with beams from all derections, the pillar on the outer wall is generally connected with beams from three directions, and the pillar in the coner is generally connected with beams from two directions.

[136]

[137] The type of connector con be changed depending on the number of beam that is connected to a connector.

[138] For example, there are type 1-3 connector(Drawing 23), type 1-2 connector(

Drawing 24) and type l-2a connector (Drawing 25).

[139] Type 1-3 connector is a transformation of type 1 connector, which allows the combining of a connector with three beams.

[140] Type 1-2 connector is a transformation of type 1 connector, which allows the combining of a connector with two beams.

[141] Type l-2a connector is a transformation of type 1-2 connector. Type 1-2 connector is to be installed on the upper or lower prefabricated pillar and used as upper pillar connector, the lower pillar connector or the beam connector, while type l-2a connector is to be installed on the center of the prefabricated pillar and used only as the beam connector.

[142]

[143] Connectors other than type 1 might be regarded as transformations of connector that can combine two or three beams. Since these connectors have the same principle as type 1-2, type 1-3 connector, which are transformations of type 1 connector, details shall be omitted.

[144]

[145] Second, pillar body(60) is generally a concrete square pillar or reinforced concrete square pillar.(In particular case, other forms such as cylinder is possible to prefabricated pillar, but its principle of manufacure is same as quadrangular pillar, so details shall be omitted).

[146]

[147] In the case where the pillar body is made of reinforced concrete, reinforcing bars are arranged appropriately in the pillar body to strengthen it. Since this is identical to the case of general reinforced concrete, details shall be omitted.

[148]

[149] Pillar body (60) combines the upper pillar connector, lower pillar connector, and beam connector, explained above, into a lump to fix them to the pillar. It also supports the load of building.

[150]

[151] There are prefabricated pillars with height of one-story building(hereafter called

"one-step prefabricated pillar"), but It is also possible to manufacture prefabricated pillars with height of two-storied building(hereafter called "two-step prefabricated pillar") and pillars even higher than that.

[152]

[153] One-step prefabricated pillar(see drawing 6) does not require separate beam connector, since upper pillar connector and lower pillar connector can play the role of beam connector. Not only prefabricated pillar used in buildings higher than two- stories(see drawing 3) should have upper pillar connector and lower pillar connecter installed at the both ends of pillar, but also the beam connector installed at the center of pillar or where pillar and beam meets.

[154]

[155] Connector and pillar body, parts of prefabricated pillar, have been explained above, and the process of manufacturing prefabricated pillar is as follows.

[156] As for concrete prefabricated pillar, upper pillar connector, lower pillar connector, and beam connector shall first be arranged properly at the place where pillar is to be made, mold shall then be made around the place of pillar body to pour concrete in, and finally concrete shall be cured before separating the mold from the pillar body to complete prefabricated pillar.

[157]

[158] As for reinforced concrete prefabricated pillar, upper pillar connector, lower pillar connector, and beam connector shall first be arranged properly at the place where pillar is to be made, and reinforcing bars shall be arranged properly to be included in the pillar body, mold shall then be made around the place of pillar body to pour concrete in, and finally concrete shall be cured before separating the mold from the pillar body to complete prefabricated pillar.

[159]

[160] Accordingly, to combine connectors with the pillar body, a part of connector should be stuck into the concrete of the pillar body (or united with the pillar body).

[161]

[162] Third, H-beam is generally used as beam(70). There are holes(91 or 92) at the both ends of the beam to insert bolts. When combining a connector with a beam, bolts should be inserted in these holes and tightened up by nuts.

[163]

[164] Fourth, following are easy explanations of the connections between prefabricated pillars and connections between a prefabricated pillar and a beam by drawings.

[165]

[166] Drawing 1 is the squint drawing of a two-step prefabricated pillar using type 1 connector combined with a beam.

[167] [168] Drawing from 3 to 8 are prefabricated pillars using a type 1 connector.

[169]

[170] Drawing 3 is a squint drawing of a two-step prefabricated pillar.

[171]

[172] Drawing 4 is a look of two two-step prefabricated pillars connected vertically.

[173]

[174] Drawing 5 is a look of three beams connected where two two-step prefabricated pillars are conected vertically. [175]

[176] Drawing 6 is a squint drawing of a one-step prefabricated pillar.

[177]

[178] Drawing 7 is a look of two one-step prefabricated pillars connected vertically.

[179] [180] Drawing 8 is a look of a beam connected where two one-step prefabricated pillars are connected vertically. [181]

[182] Drawing 10 and 11 are prefabricated pillars using a type 2 connector.

[183]

[184] Drawing 10 is a squint drawing of a two-step prefabricated pillar.

[185] [186] Drawing 11 is a look of three beams connected where two two-step prefabricated pillars are connected vertically. [187]

[188] Drawing 13 and 14 are prefabricated pillars using a type 3 connector.

[189]

[190] Drawing 13 is a squint drawing of a two-step prefabricated pillar.

[191] [192] Drawing 14 is a look of three beams connected where two two-step prefabricated pillars are connected vertically. [193]

[194] Drawing 16 and 17 are prefabricated pillars using a type 4 connector.

[195]

[196] Drawing 16 is a squint drawing of a two-step prefabricated pillar.

[197] [198] Drawing 17 is a look of three beams connected where two two-step prefabricated pillars are connected vertically. [199] [200] Drawing 19 and 20 are prefabricated pillars using a type 5 connector. [201]

[202] Drawing 19 is a squint drawing of a two-step prefabricated pillar.

[203]

[204] Drawing 20 is a look of three beams connected where two two-step prefabricated pillars are connected vertically . On this drawing there is a steel plate(75) put over between type 5 connector and beam(70) connected with bolts and nuts. [205] [206] Following are the esamples of prefabricated pillars at the coner of building where a connector and two beams are combined: [207] [208] Drawing 26 is a squint drawing of a two-step prefabricated pillar where type 1-2 connector are used as upper pillar connector and lower pillar connector. As a beam connector, a type l-2a connector is used. [209] [210] Drawing 27 is a squint drawing of two two-step prefabricated pillars using type 1-2 and type l-2a connectors, connected vertically. [211] [212] Drawing 28 is a squint drawing of two beams connected perpendicularly to where two two-step prefabricated pillars using type 1-2 and type l-2a connectors are connected vertically. [213] [214] The essential parts of prefabricated pillar like upper pillar connector, lower pillar connector, beam connector and pillar body are explained so far. From now on, vertical connecting bar(95), a stiffener of prefabricated pillar, is explained. [215] [216] Vertical connecting bar(95), made of metal or plastic, combines various connectors (upper pillar connector, beam connector, and lower pillar connector) vertically to prevent connectors from separating from the pillar body or transforming by the exterior force, or to strengthen the pillar body. [217] [218] It is possible to combine the vertical connecting bar with various connectors by welding or using bolts and nuts. [219] [220] According to these methods of connection, there are also two types of vertical connecting bar which are type 1 vertical connecting bar(drawing 31) and type 2 vetical connecting bar(drawing 32)(Section of vertical connecting bar can be a rectangle or an alphbet 'L' as well as a square. Here details are omitted as the principles are the same.

Only the vertical connecting bar with a square section is explained here). [221]

[222] A type 1 vertical connecting bar(drawing 31) does not have any extra equipment on it to combine itself with various connectors. Vertical connecting bar and various connectors could be combined through welding. [223] [224] A type 2 vertical connecting bar(drawing 32) has bolt insertion holes(95a) where vertical connecting bar and various connectors contact each other. [225] [226] In the case where a prefabricated pillar uses the type 2 vertical connecting bar, there are also bolt insertion holes(86 or 87) on various connectors to combine themselves with the vertical connecting bar. [227] [228] An example of combining a type 2 vertical connecting bar with various connectors is as follows. [229] Bolt insertion holes(95a) on a type 2 vertical connecting bar and those(86 or 87) on various connectors should be arranged and fitted with the bolts inserted and the nuts fastened. [230] [231] Following is an example of prefabricated pillars using a type 1 vertical connecting bar: [232] [233] Drawing 33 is a squint drawing of the frame of two-step prefabricated pillar made by welding a type 3 connector with a vertical connecting bar. [234] [235] Drawing 34 is a squint drawing of a two-step prefabricated pillar using a type 3 connector and a type 1 vertical connecting bar. [236] [237] Drawing 35 is a squint drawing of the frame of two-step prefabricated pillar made by welding a type 4 connector with a type 1 vertical connecting bar. [238] [239] Drawing 36 is a squint drawing of a two-step prefabrecated pillar using a type 4 connector and a type 1 vettical connecting bar. [240] [241] Following is an example of prefabricated pillars using a type 2 vertical connecting bar: [242] [243] Drawing 37 is a squint drawing of the frame of two-step prefabricated pillar, using type 6 connector and type 2 vertical connecting bar, commbined by bolts and nuts. [244]

[245] Drawing 38 is a squint drawing of a two-step prefabricated pillar using a type 6 connector and a type 2 vertical connecting bar. [246] [247] Drawing 39 is a squint drawing of the frame of two-step prefabricated pillar using a type 7 connector and a type 2 vertical connecting bar which are combined by bolts and nuts. [248] [249] Drawing 40 is a squint drawing of a two-step prefabricated pillar using a type 7 connector and a type 2 vertical connecting bar. [250] [251] To manufature a reinforced concrete prefabricated pillar using a vertical connecting bar, an upper pillar connector, a lower pillar connector and a beam connector should first be attached to vertical connecting bar, and then installing reinforcing rods in proper place, making molds around the place for pillar body, pouring concretes, curing concretes until dried, removing molds should be done accordingly. [252]

Industrial Applicability [253] It is possible to use this invention of prefabricated pillars for all kinds of buildings (especially for all kinds of buildings that use concrete). [254] [255]

Claims

[1] Concerning a concrete pillar or a a reinforced concrete pillar of a building, this pillar is mobile as it is manufactured as an independent unit. This is a prefabricated pillar characterized by parts such as; An upper pillar connector(30) is in the form of a plank or a bar that is stuck and fixed on the pillar at some parts with the remaining parts protruding out of the pillar body.

There are plural holes for bolt insertion on the protruded plank or the bar, and bolts and nuts should be used through these holes to combine the upper part of a concerned pillar with the lower part of an another pillar that is to be assembled above.

A lower pillar connector(40) is in the form of a plank or a bar that is stuck and fixed on the bottom of the pillar at some parts with the remaining parts protruding out of the pillar body. There are plural holes for bolt insertion on the protruded plank or the bar, and bolts and nuts should be used through these holes to combine the lower part of a concerned pillar with the upper part of an another pillar that is to be assembled below.

A beam connector(50) is in the form of a plank or a bar that is stuck and fixed in the pillar body at some parts where a concerned pillar and a beam are met with the remainig parts protruding out of the pillar body.

There are plural holes for bolt insertion on the protruded plank or the bar, and bolts and nuts should be used through these holes to combine the concerned pillar with the beam(70).

A pillar body(60) is made of concrete or reinforced concrete to fix an upper pillar connector, a lower pillar connector and a beam connector to the pillar while combining them as a lump, and supporting the load of a building.

[2] Concerning claim 1, this is a prefabricated pillar characterized by more than one vertical connecting bar(95) that combines an upper pillar connector, a beam connector, and a lower pillar connector vertically to reinforce the pillar.

[3] Concerning claim 1 and 2, this is a prefabricated pillar characterized by bolt insertion holes made on each of vertical connecting bar(95) and various connectors (an upper pillar connector, a lower pillar connector and a beam connector) at the place where vertical connecting bar and various connectors contact each other, in order to combine the vertical connecting bar with various connectors.

[4] Concerning claim 1 and 2, this is a prefabricated pillar characterized by the materials. Upper pillar connector, lower pillar connector, beam connector and vertical connecting bar are made of metal or plastic.