KR102177745B1 - Column type PC frame for rooftop - Google Patents

Abstract

The present invention relates to a column-type rooftop PC frame formed by mounting PC girders on corbel members protruding from a side surface of PC columns and placing slab members on the top thereof, and more specifically, to a column-type rooftop PC frame which can minimize the number of PC members per type regardless of planar shape by the use of the PC columns, can facilitate construction while reducing the burden of transportation and lifting, and can economically construct a rooftop structure. The column-type rooftop PC frame of the present invention comprises: multiple PC columns installed on the top of a rooftop floor slab in a building and having at least one corbel member protruding from a side surface; PC girders installed between the PC columns and mounted on the top of the corbel members; and slab members constructed on the top of the PC girders or the corbel members of the PC columns. The slab members consist of: a PC slab placed on the top of the PC girders and having a stepped part protruding from the outer edge of the top surface to the same height as the top surface of the slab members; and field concrete placed inside the stepped part on top of the PC slab.

Description

Column type PC frame for rooftop}

The present invention relates to a columnar rooftop PC frame formed by mounting a PC girder on a corbel member protruding from the side of a PC column and placing a slab member on the top, and more specifically, the type regardless of the planar shape by using the PC column. It is about a column-type rooftop PC frame that can minimize the number of PC members per unit, is easy to construct, and can economically construct a rooftop structure with less burden of transportation and lifting.

Rooftop structures are provided for elevator halls, machine rooms, and staircase rooms on the rooftops of buildings such as apartments, offices, various government offices and commercial facilities.

In general, the building itself is often kept the same plane for all floors, so that the construction is repeated for each floor by a large formwork such as gangfoam. However, the rooftop structure cannot be constructed as a large formwork because the lower layer and the planar shape are different. Accordingly, it is mainly constructed using the conventional formwork by the RC method.

However, this conventional method has a problem that it is difficult to secure quality. In addition, since the rooftop structure is constructed after most of the frame construction is completed, there is a difficulty in supplying manpower for the process or supplying concrete for on-site casting.

Accordingly, a method for constructing a rooftop structure by assembling a PC wall has been developed, as in Korean Patent Publication No. 10-2002-0089635 (name of the invention: Construction method of an apartment rooftop).

However, this conventional PC method is a factor that increases the cost compared to the existing RC method because the quantity of PC members is relatively increased.

In addition, the conventional PC construction method has a large self-weight of the PC member, which is difficult to lift, and since the tower crane is disassembled and withdrawn at the time of construction of the rooftop floor, the tower crane may not be used in many cases, making it difficult to construct the rooftop floor.

In addition, the rooftop structure has a low height of one or two floors, and the shape and size of each site and level are different, so the number of PC member types is excessive, while the number of required members for each type is inevitable. Therefore, unless modularization of architectural design is accompanied, there is a problem that the efficiency of PCization is very low, there is difficulty in material management, and workability is also poor.

In order to solve the above problems, the present invention can minimize the number of PC members for each type regardless of the planar shape when constructing a rooftop structure by a PC member, and a pillar-type rooftop PC frame that is easy to install while having a small weight burden. Want to provide.

The present invention according to a preferred embodiment is to be installed on the upper part of the floor slab of the roof of a building, a plurality of PC pillars having at least one cobel member protruding from the side; A PC girder installed between a plurality of PC posts and mounted on the top of the cobell member; And a slab member installed on the top of the PC degeor or the cobel member of the PC column. Consisting of, wherein the slab member is mounted on the upper portion of the PC girder, and is composed of a PC slab with a stepped portion having the same height as the upper surface of the slab member formed on the outer edge of the upper surface, and field concrete poured into the stepped portion of the upper portion of the PC slab, and the The upper surface of the PC girder is provided so that the second anchor bolt protrudes, and the PC slab has a second through hole through which the second anchor bolt passes, and the PC slab passes through the second through hole and protrudes to the top of the PC slab. It provides a columnar rooftop PC frame, characterized in that the PC slab is fixed to the PC girder by fastening the fastening nut to the second anchor bolt.

In the present invention according to another preferred embodiment, a first anchor bolt is provided to protrude from the upper surface of the cobell member, and a first through hole through which the first anchor bolt passes is formed at an end of the PC girder, and the first through hole is formed. It provides a columnar rooftop PC frame, characterized in that the PC girder is fixed to the cobell member by fastening a fastening nut to the first anchor bolt protruding from the top of the PC girder through the ball.

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The present invention according to another preferred embodiment of the present invention is that the PC pillar is formed in a square in cross section, a pillar body in which a cobel member protrudes from the side, and a plurality of the lower end protruding from the lower portion of the pillar body It consists of a transition plate provided to be spaced apart from the main muscle and the pillar body, and is coupled to the lower end of the plurality of major muscles, and has a third through hole formed between the main muscle positions, and the vertical reinforcement pre-formed on the floor slab is the first of the transition plate. It provides a pillar-type rooftop PC frame, characterized in that it is fixed and coupled to the three through holes.

The present invention according to another preferred embodiment provides a columnar rooftop PC frame, characterized in that the lower portion of the PC column is temporarily fixed to the floor slab (1) by a reinforcing angle.

The present invention according to another preferred embodiment is a column type, characterized in that the PC beam is provided in the mounting groove formed on the upper portion of the PC girder by protruding protruding jaws at both ends between a pair of facing PC girders. Provides a rooftop PC frame.

According to the present invention, for the construction of a rooftop structure, it is possible to provide a columnar rooftop PC frame formed by mounting a PC girder on a corbel member protruding from the side of a PC column and placing a slab member on the top.

In particular, since the corbel type PC column with the corbel member protruding on the side is used, most of the planar shape can be implemented with only a few modules, minimizing the type of PC member required and maximizing the PCization efficiency of the rooftop structure. have.

In addition, since a PC post, which has a very light weight compared to a PC wall, is used, the burden of transporting and lifting the PC member is small, construction is easy and economical.

1 is a perspective view showing a pillar-type rooftop PC frame of the present invention.
Figure 2 is a perspective view showing embodiments of the modularized Kobel type PC column.
Figure 3 is a perspective view showing embodiments of the length of the PC pillar.
Fig. 4 is a cross-sectional view showing a joint portion of a PC girder and a PC post.
5 is a cross-sectional view showing an embodiment of a slab member.
Fig. 6 is a cross-sectional view showing a joint portion of a PC slab and a PC girder.
7 is a perspective view showing a coupling relationship between a PC column and a floor slab.
8 is a perspective view showing a state in which the PC column is coupled to the floor slab.
9 is a perspective view showing a state in which a non-shrinkable mortar is filled in a lower portion of the column body.
10 is a cross-sectional view showing a state in which the PC column is coupled to the floor slab by a sleeve.
11 is a perspective view showing a state in which the PC column is fixed by a reinforcing angle.
Fig. 12 is a perspective view showing a coupling relationship between a PC beam and a PC girder.

Hereinafter, the present invention will be described in detail according to the accompanying drawings and preferred embodiments.

1 is a perspective view showing a pillar-type rooftop PC frame according to the present invention, FIG. 2 is a perspective view showing embodiments of a modularized Kobel-type PC pillar, and FIG. 3 is a perspective view showing embodiments of a PC pillar for each length.

As shown in Fig. 1, the present invention columnar rooftop PC frame is installed on the upper part of the building rooftop floor slab 1, and at least one cobel member 21 protrudes from the side surface of a plurality of PC columns 2 ); A PC girder (3) installed between a plurality of PC posts (2) and mounted on an upper portion of the cobell member (21); And a slab member 4 installed on the top of the PC girder 3 or the cobel member 21 of the PC column 2; It characterized in that it consists of.

The present invention is to provide a columnar rooftop PC frame that can minimize the type of PC member required irrespective of the planar shape, and is easy to construct while having a small weight burden.

In the present invention, the rooftop structure is formed as a column type PC frame.

The present invention columnar rooftop PC frame is constituted by including a plurality of PC columns 2, PC girders 3, and slab members 4.

The PC pillar 2 is installed on the upper part of the floor slab 1 on the roof of the building.

The PC pillar 2 may include a Kobel type PC pillar 2 in which at least one corbel member 21 protrudes from a side surface.

These Kobel-type PC pillars 2 can be modularized into 2 to 4 types to implement most of the planar shapes, and PC pillars 2 can be manufactured according to the required length using one mold when manufacturing a PC member.

Accordingly, it is possible to maximize the PCization efficiency of the rooftop structure.

Moreover, the PC column 2 is very light in weight compared to the PC wall, so it is less expensive to carry and lift, and it is economical because it requires relatively little material.

As shown in (a) to (c) of Figure 2, the PC pillar 2 can be manufactured in various shapes according to the position of the cobel member 21.

That is, as shown in (a) of FIG. 2, each of the two adjacent sides is provided with a corbel member 21 and can be utilized as a corner post using the a-shaped PC pillar 2 arranged in an a-shaped plane. Do.

As shown in (b) of FIG. 2, it is possible to use as an intermediate pillar by using a T-shaped PC pillar 2, which is provided with a corbel member 21 on each of the three neighboring surfaces and arranged in a T-shape in a plane. .

As shown in (c) of FIG. 2, the corbel member 21 may be used when a partial multilayer configuration is required by using the straight PC pillar 2 provided only on one side.

On the other hand, most of the rooftop structures are small and do not require internal pillars. However, in some cases, it is also possible to use a +-shaped PC column 2 provided with a corbel member 21 on each of the four sides and arranged in a +-shaped plane (not shown).

In the present invention, each type of PC pillar (2) for each type, such as an a-shaped, T-shaped, straight or +-shaped PC column for forming a pillar-type rooftop PC frame, retains the mold for manufacturing an a-shaped, T-shaped, straight or +-shaped PC column. It can be produced using.

That is, by using a mold capable of forming the corbel member 21 on each side of the PC column 2, but opening only the necessary corbel member 21, an a-shaped, T-shaped, straight or +-shaped PC column ( 2) can be produced.

If it is manufactured in this way, the PC manufacturing efficiency can be greatly increased, and the cost can be reduced to the level of the RC method.

The corbel member 21 may be provided over one or two layers depending on the height of the rooftop structure.

That is, it is possible to fabricate a two-layer single cut-out PC pillar 2 as shown in FIG. 3 (a) or a one-layer single cut-out PC column 2 as shown in FIG. 3 (b).

As shown in FIG. 3, even if the PC pillars 2 have different lengths, it is possible to manufacture the PC pillars 2 of various lengths by blocking only the necessary portions in the same mold.

A PC girder (3) is installed between the plurality of PC posts (2).

At this time, the PC girder (3) is mounted on the top of the corbel member (21) of the PC column (2).

A slab member 4 is installed on the upper part of the cobel member 21 of the PC girder 3 or the PC column 2.

That is, the slab member 4 may be mounted on the PC girder 3.

Alternatively, the slab member 4 may be configured to be directly mounted on the top of the cobel member 21 of the PC column 2.

The slab member 4 can be formed by placing concrete on the top of the deck or by placing concrete on the top of the PC slab.

As described above, ALC (Auto Lightweight Concrete) blocks are stacked inside the pillar-type rooftop PC frame composed of PC pillars (2), PC girders (3) and slab members (4), and AL windows and exterior panels are attached to the outside. By doing so, it is possible to quickly and easily complete the construction of the rooftop structure by the dry method.

4 is a cross-sectional view showing a joint portion of a PC girder and a PC post.

As shown in Fig. 4, the first anchor bolt 22 is provided to protrude from the upper surface of the corbel member 21, and the first anchor bolt 22 penetrates through the end of the PC girder (3). A first through hole 311 is formed, and a fastening nut N is fastened to the first anchor bolt 22 protruding from the top of the PC girder 3 through the first through hole 311 The girder 3 can be configured to be fixed to the cobel member 21.

The rooftop structure is usually small and the length of the PC girder (3) is not long. Therefore, the PC girder 3 may not be strongly bonded to the PC column 2 but may be pin bonded.

Therefore, the PC girder (3) can be connected to the cobel member (21) in a pin joint structure by the first anchor bolt (22) to simplify the connection of the PC girder (3) and the PC column (2) and to facilitate construction. have.

To this end, the first anchor bolt 22 is pre-embedded in the corbel member 21 so that the upper end protrudes upward from the corbel member 21. And after mounting the PC girder (3) on the cobell member (21) so that the protruding portion of the first anchor bolt (22) is inserted into the first through hole (311) of the PC girder (3), PC girder (3) ) From the top of the first anchor bolt (22) to the fastening nut (N) is fixed.

Accordingly, the joint portion of the PC girder 3 and the cobel member 21 is supported only by the shear force. And the first anchor bolt 22 serves to prevent separation of the PC girder 3 by fixing the position of the PC girder 3.

It is preferable that the first anchor bolt 22 is embedded in the cobel member 21 in advance when the PC column 2 is manufactured to minimize field work. However, it is also possible to fix the first anchor bolt 22 to the corbel member 21 by anchoring it later depending on the manufacturing conditions or on-site conditions of the PC column 2.

A pocket portion 31 accommodating the upper end of the first anchor bolt 22 and the fastening nut N is formed on the upper surface of the end of the PC girder 3, and the first through hole 311 is a pocket portion 31 ) Can be configured to be formed within.

In this case, when the slab member 4 is installed later, the upper end of the first anchor bolt 22 and the fastening nut N do not interfere with each other with the slab member 4.

After the fastening nut (N) is fastened to the first anchor bolt (22), the pocket part (31) is filled with non-shrinkable mortar (M) to loosen the fastening nut (N) or the first anchor bolt (22) and It is possible to prevent corrosion of the fastening nut (N).

5 is a cross-sectional view showing an embodiment of a slab member.

As shown in Fig. 5, the slab member 4 is mounted on the upper portion of the PC girder 3, and a stepped portion 411 having the same height as the upper surface of the slab member 4 is formed outside the upper surface of the PC slab ( 41) and on-site concrete 42 that is poured into the stepped portion 411 on the upper portion of the PC slab 41.

When the slab member 4 is composed of a PC slab and on-site concrete poured on the top of the PC slab, a separate form must be installed at the edge of the slab member 4 for on-site concrete pouring.

In order to omit such field work, in the present invention, a stepped portion 411 capable of serving as a formwork may be formed on the outer periphery of the upper surface of the PC slab 41 to a predetermined height.

When the PC slab 41 is divided into a plurality of pieces, it is not necessary to form the stepped portion 411 along all surfaces of the PC slab 41, and only the portion of the PC slab 41 located at the outermost side of the entire floor The stepped portion 411 may be formed.

6 is a cross-sectional view showing a joint portion of a PC slab and a PC girder.

6, the second anchor bolt 32 is provided to protrude from the upper surface of the PC girder (3), and the second anchor bolt (32) penetrates through the PC slab (41). A through hole 412 is formed, and a fastening nut N is fastened to the second anchor bolt 32 protruding from the top of the PC slab 41 through the second through hole 412 to fasten the PC slab ( 41) can be configured to be fixed to the PC girder (3).

The general PC slab is integrated with each other by placing concrete on the top of the PC slab and PC girder while the end of the PC slab is over a part of the upper surface of the PC girder.

However, when the stepped portion 411 is formed on the PC slab 41, it is impossible to integrate the concrete 42 to the top of the PC girder 3 by pouring on-site.

In addition, since the rooftop structure is small in size and the width of the PC girder 3 is narrow, it is difficult to secure the width for mounting the PC slab 41.

Therefore, the PC slab 41 is mounted so that there is no empty space above the PC girder 3, and the PC slab 41 is attached to the PC slab 41 by the second anchor bolts 32 pre-embedded in the PC girder 3 It can be configured to be pin-bonded by fixing it on 3).

To this end, a second anchor bolt 32 is pre-embedded in the PC girder 3 so that the upper end protrudes to the top of the PC girder 3. And after positioning the PC slab 41 so that the protruding portion of the second anchor bolt 32 is inserted into the second through hole 412 of the PC slab 41, the second Fasten the anchor bolt (32) by fastening the fastening nut (N).

At this time, since the upper end of the second anchor bolt 32 and the portion of the fastening nut (N) are buried in the site concrete 42 to be cast in the field, it is not necessary to form a pocket part 31 in the PC slab 41 separately.

7 is a perspective view showing a coupling relationship between the PC pillar and the floor slab, FIG. 8 is a perspective view showing a state in which the PC pillar is coupled to the floor slab, and FIG. 9 is a state in which non-shrink mortar is filled in the lower part of the pillar body Is a perspective view showing.

As shown in Figs. 7 to 9, the PC pillar 2 is formed in a quadrangular cross-sectional shape, the pillar body 20 in which the corbel member 21 protrudes from the side, and at each corner of the pillar body 20 A plurality of main roots 23 which are reinforced and formed to protrude from the lower end of the column body 20 and the main roots 23 are provided so as to be spaced apart from the column body 20 and are coupled to the lower ends of the plurality of main muscles 23 It is composed of a transition plate 24 in which a third through hole 241 is formed between, and the vertical reinforcing bar 11 pre-formed on the floor slab 1 is a third through hole 241 of the transition plate 24 ) Can be configured to be fixed.

In a general column, the main bar of the column is connected to the vertical reinforcing bar in the lower part to transmit the axial force of the main bar. For this purpose, the main bars and the vertical reinforcing bars are overlapped or connected by a coupler or the like.

However, it is difficult to secure the joint length for the PC post (2). In the case of a mechanical joint by a coupler, not only is the cost of the coupler expensive, but also the application of a small column with a small cross-sectional area is difficult because it is difficult to secure a cover thickness or a concrete flow space.

Therefore, in the present invention, in order to transfer the stress of the upper column main bar 23 and the lower vertical bar 11, a transfer plate 24 capable of load transfer is used as the main bar 23 and the vertical bar ( 11) can be connected.

That is, the axial force of the upper main muscles 23 is transmitted to the transition plate 24, which is transmitted to the vertical reinforcing bars 11 located between the main muscles 23 by the shear force of the transition plate 24.

Accordingly, even if the centers of the main bars 23 and the vertical reinforcing bars 11 do not coincide, the axial force can be smoothly transmitted through the transition plate 24.

It is preferable that the thickness of the transition plate 24 is thicker than that of a general bonding plate.

The main root 23 can be fixed to the four corners of the transition plate 24 by welding (W) or a fastening nut (N).

The third through hole 241 formed in the transition plate 24 is formed between the adjacent main roots 23.

For example, when the main muscle 23 is formed in the four corners of the transition plate 24, the third through hole 241 may be formed in the center of each surface of the transition plate 24.

The vertical reinforcing bar 11 pre-installed on the upper part of the building is inserted into the third through hole 241 and can be fixed to the transition plate 24 by the upper and lower fastening nuts N.

Accordingly, since the main bars 23 and the vertical reinforcing bars 11 are arranged to cross each other, there is no interference between them, so that the installation work of the PC column 2 is very easy.

And by adjusting the height of the fastening nut (N) it is possible to adjust the verticality of the PC column (2).

As shown in FIG. 9, a non-shrinkable mortar (M) may be filled after installing a formwork (not shown) outside the lower space of the column body 20.

A belt reinforcement (not shown) is arranged outside the main muscle 23 in the column body 20.

10 is a cross-sectional view showing a state in which the PC column is coupled to the floor slab by a sleeve, and FIG. 11 is a perspective view illustrating a state in which the PC column is fixed by a reinforcing angle.

As shown in FIG. 11, the lower portion of the PC column 2 may be temporarily fixed to the floor slab 1 by a reinforcing angle 6.

As shown in Fig. 10, the PC column 2 is manufactured by embedding a sleeve 24 at the bottom of the column main muscle 23, and the vertical reinforcing bar 11 on the floor slab 1 at the position where the PC column 2 will be installed. ) In advance to insert the vertical reinforcing bar 11 into the lower part of the sleeve 24, and then the inside of the sleeve 24 and the PC post 2 through the injection hole of the sleeve 24. The PC post (2) can be fixed by filling the bottom of the non-shrink mortar (M). At this time, in the space between the PC pillar 2 and the floor slab 1, a simple rate 25 may be installed in order to adjust the verticality of the PC pillar 2.

However, since the rooftop structure does not have a large vertical load, the PC column 2 has to be designed largely. In this case, there is a concern that a large displacement occurs on the upper part of the PC column 2 during the curing time of the non-shrinkable mortar (M) for fixing the PC column 2, thereby impairing safety.

Therefore, it is possible to secure safety during construction by attaching a reinforcing angle 6 of a detachable temporary hypothesis to the lower part of the PC column 2 and fixing it to the floor slab 1.

The reinforcing angle 6 is composed of a vertical plate 61 and a horizontal plate 62.

An insert (not shown) is pre-embedded inside the PC pillar 2, and a third anchor bolt 64 penetrating the vertical plate 61 of the reinforcing angle 6 is fastened to the insert and fixed.

The horizontal plate 62 of the reinforcing angle 6 is fixed to the floor slab 1 with fourth anchor bolts 65 pre-installed on the floor slab 1.

A wing plate 63 may be provided between the vertical plate 61 and the horizontal plate 62 in order to stably support the lower moment due to the column displacement. In this case, since the reinforcing angle 6 can support both forward and reverse moments, the reinforcing angle 6 may be installed only on two adjacent sides of the four sides of the PC column 2.

The reinforcing angle 6 can be reused repeatedly by removing the non-shrinkable mortar (M) after curing.

12 is a perspective view showing a coupling relationship between a PC beam and a PC girder.

As shown in Fig. 12, between a pair of facing PC girders (3), straddling jaws (51) are protruding from both ends to be mounted in the mounting groove (33) formed on the upper portion of the PC girder (3). A PC beam 5 may be provided.

In general, an elevator room needs a beam for installing a hoisting machine hook of an elevator.

For this, a PC beam 5 can be installed between a pair of PC girders 3 facing each other.

A mounting groove 33 may be formed on the upper part of each PC girder 3, and a spanning jaw 51 protrudes at the end of the PC beam 5 so that the end can be mounted on the mounting groove 33. I can.

The mounting groove 33 may be formed in the center of the PC girder 3 to support the elevator room in a balanced manner.

The height of the straddle (51) is the depth of the mounting groove (33) formed on the end of the PC beam (5) so that the upper part of the upper PC beam (5) and the upper part of the PC girder (3) form the same plane. It is possible to protrude to a corresponding size.

As described above, when both ends of the PC beam 5 are simply mounted on a pair of PC girders 3, and both ends are installed in a pin-joined structure, the details of the joint are very simple and construction is easy.

1: floor slab 11: vertical reinforcement
2: PC pillar 20: pillar body
21: Kobel member 22: first anchor bolt
23: main muscle 24: transition plate
241: 3rd through hole 3: PC girder
31: pocket part 311: first through hole
32: second anchor bolt 33: mounting groove
4: slab member 41: PC slab
411: stepped part 412: second through hole
42: site concrete 5: PC beam
51: straddle M: non-shrink mortar
N: Fastening nut W: Welding

Claims (7)

A plurality of PC pillars (2) installed on the upper part of the building roof top floor slab (1) and having at least one corbel member (21) protruding from the side thereof;
A PC girder (3) installed between a plurality of PC posts (2) and mounted on the top of the cobell member (21); And
A slab member 4 installed on the PC girder 3 or the cobel member 21 of the PC column 2; It consists of,
The slab member 4 is mounted on the upper part of the PC girder 3, and the PC slab 41 and the PC slab 41 having a stepped portion 411 having the same height as the upper surface of the slab member 4 are formed outside the upper surface. ) It is composed of on-site concrete 42 that is poured into the upper stepped portion 411,
The upper surface of the PC girder 3 is provided with a second anchor bolt 32 protruding, and a second through hole 412 through which the second anchor bolt 32 passes is formed in the PC slab 41 , By fastening a fastening nut (N) to the second anchor bolt (32) protruding from the top of the PC slab (41) through the second through hole (412), the PC slab (41) becomes a PC girder (3) Column-type rooftop PC frame, characterized in that fixed to the.
In claim 1,
A first through hole 311 through which the first anchor bolt 22 penetrates is provided on the upper surface of the corbel member 21 so that the first anchor bolt 22 protrudes, and the end of the PC girder 3 It is formed, by fastening a fastening nut (N) to the first anchor bolt (22) protruding to the top of the PC girder (3) through the first through hole (311), the PC girder (3) is a cobel member ( 21) a pillar-type rooftop PC frame, characterized in that fixed to.
delete delete In claim 1,
The PC pillar 2 is formed in a cross-sectional shape in a quadrangular shape, the pillar body 20 on which the cobel member 21 protrudes from the side surface, and the lower end of the pillar body 20 is arranged at each corner of the pillar body 20 A plurality of main roots 23 protruding into and provided to be spaced apart from the pillar body 20 and coupled to the lower end of the plurality of main muscles 23 has a third through hole 241 between the positions of the main muscles 23 It consists of a transition plate 24 to be formed, characterized in that the vertical reinforcing bar 11 pre-formed on the floor slab 1 is coupled and fixed to the third through hole 241 of the transition plate 24 Rooftop PC frame.
In claim 1,
A columnar rooftop PC frame, characterized in that the lower portion of the PC column (2) is temporarily fixed to the floor slab (1) by a reinforcing angle (6).
In claim 1,
Between a pair of facing PC girders (3), straddling jaws (51) are protruding at both ends, and a PC beam (5) mounted in a mounting groove (33) formed on the upper portion of the PC girder (3) is provided. Pillar rooftop PC frame, characterized in that.

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