KR102007936B1 - Fixing structure of prefabricated steel frame assembly and permanent form panel - Google Patents

Abstract

The present invention relates to a fixing structure of a prefabricated steel frame assembly and a permanent form panel, which is able to allow the permanent form panel to be firmly supported by the steel frame assembly by a simple method without a separate fastening member, improve constructability and economic feasibility, reduce the construction period, and resist the lateral pressure of concrete focused on an edge meeting with the permanent form panel. According to the present invention, the prefabricated steel frame assembly, which is for a steel-concrete composite member, comprises: cast steel materials placed on each edge of a member; and transverse support members engaged with an external side of the cast steel materials at right angles to the cast steel materials, whose one side leg is vertically bent towards an external side of the member. The permanent form panel is engaged with the transverse support members. The permanent form panel includes: a plate-shaped panel main frame; and an engagement rail placed on one surface of the panel main frame in the same direction as that of the transverse support members to have an engagement groove formed in a longitudinal direction, into which the leg on the one side of the transverse support members is inserted. An edge meeting with an end unit of an adjacent permanent form panel is engaged with a corner bead in a longitudinal direction of the prefabricated steel frame assembly.

Description

Fixing structure of prefabricated steel frame assembly and permanent form panel

According to the present invention, the permanent formwork panel can be firmly supported on the steel frame assembly in a simple manner without a separate fastening member, thereby improving workability, economic efficiency, and shortening air, and can resist concrete side pressure concentrated at the corner where the permanent formwork panel meets. It is about the fixed structure of prefabricated steel assembly and permanent formwork panel.

The formwork is installed for a short period of time until the concrete paste is cured in order to make the concrete into a predetermined shape and dimensions. Existing formwork is supported by a support frame for preventing deformation, which is heavy in weight and supported by external construction. Material and construction amount is considerable.

The rigid cast steel is placed outside the member and the formwork is directly coupled to the lateral support member in the steel concrete composite member (PSRC) using a pre-assembled steel frame assembly having a lateral support member that connects them in the lateral direction from the outside. Technology has been developed and used (Patent No. 10-1490748, etc.).

The technology has the advantage of eliminating the temporary material for supporting the formwork to reduce the cost and shorten the air as well as to improve the safety of the operator.

In the past, such formwork was used to form the formwork of the steel sheet to be demoldable or for permanent presence.

However, on the site where the steel sheet may be corroded or need to take extra measures against fire, mortar panel or FRP panel is used as permanent formwork.

However, since these types of panels are thicker and have a larger weight than the steel sheets, it is difficult to fix them to the lateral support members of the pre-assembled steel frame assembly by a direct screw or the like. In addition, since the fastening member is exposed to the outside, there is a risk that the permanent formwork panel may fall off due to damage of the fastening member in case of fire.

On the other hand, there is a disadvantage that the side pressure is concentrated in the corner of the member when the neighboring permanent formwork panel meets during concrete pouring.

In order to solve the above problems, the present invention is to provide a fixed structure of the pre-assembly steel assembly and the permanent formwork panel that can be fixed to the pre-assembly steel frame assembly by a simple method without a separate fastening member.

The present invention is to provide a fixed structure of the pre-assembled steel frame assembly and permanent formwork panel that is easy to install and firmly fixed in a simple structure in the construction of the reinforced concrete structure.

The present invention can use a mortar panel, FRP panel and the like as a permanent formwork panel to provide a fixed structure of the pre-assembled steel frame assembly and permanent formwork panel resistant to corrosion or fire.

The present invention is to provide a fixed structure of the pre-fabricated steel assembly and permanent formwork panel that can prevent the deformation or detachment of the permanent formwork panel by solving the disadvantage that the member edges that the neighboring permanent formwork panel meets when the concrete is vulnerable to side pressure. .

The present invention according to a preferred embodiment is composed of a cast steel disposed at each corner of the member and a transverse support member coupled to the outside of the cast steel in a direction orthogonal to the cast steel in one leg vertically bent toward the outside of the member. It relates to a fixed structure of the steel prefabricated steel assembly for the steel concrete composite member and the permanent formwork panel coupled to the transverse support member, the permanent formwork panel is the same as the transverse support member on the plate-shaped panel body and one side of the panel body It is arranged in the direction is composed of a coupling rail is formed in the longitudinal direction of the coupling groove into which the one leg of the transverse support member is inserted, the corners of the end of the adjacent permanent formwork panel meets the corner bead in the longitudinal direction of the pre-assembled steel assembly Is coupled to, one side leg outer end of the lateral support member is enlarged in cross section Is formed, the inner end of the coupling groove is formed with a fixed groove portion is inserted into the expansion portion, the permanent formwork panel is slidingly coupled at one end of the horizontal support member, the end of the expansion portion fastening groove formed with a female thread on the inner peripheral surface The enlarged portion is formed in the longitudinal direction, wherein the corner bead is pre-assembled steel frame, characterized in that fixed to the end of the enlarged portion of the transverse support member by a fastening member which is screwed into the fastening groove through the fastening hole formed in the corner bead It provides a fixed structure of the assembly and the permanent formwork panel.

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According to another preferred embodiment of the present invention, one or both ends of the enlarged part provide a fixing structure of the pre-assembled steel frame assembly and the permanent formwork panel, which is formed longer than one leg of the lateral support member.

According to another preferred embodiment of the present invention, one end of the enlarged part protrudes outward from the end of the coupling rail of the permanent formwork panel, thereby providing a fixing structure of the prefabricated steel assembly and the permanent formwork panel, which is inserted into the fastening hole of the corner bead. do.

The present invention according to another preferred embodiment provides a fixed structure of the prefabricated steel assembly and the permanent formwork panel, characterized in that the refractory material is applied to the inner surface of the permanent formwork panel.

According to another preferred embodiment of the present invention, the enlarged portion provides a fixed structure of the prefabricated steel assembly and the permanent formwork panel, which is formed by bending the outer end of one leg in a circular shape.

According to the present invention has the following effects.

First, since one side leg of the lateral support member constituting the steel assembly is inserted into the coupling groove formed in the coupling rail of the permanent formwork panel, the coupling rail of the permanent formwork panel is firmly supported over the entire width. Accordingly, it is advantageous for the side pressure support, and can be combined with the permanent formwork panel in a simple process, thereby excellent workability.

Second, by coupling the corner beads to the edge where the ends of the neighboring permanent formwork panel meet, it is possible to resist the concrete side pressure concentrated on the member edge. Accordingly, the deformation or detachment of the permanent formwork panel can be prevented.

Third, the permanent formwork panel can be fixed to the steel frame assembly without a separate fastening member such as a direct screw for fixing the formwork panel to the steel frame assembly. Therefore, it is possible to prevent the dropping of the permanent formwork panel due to the damage of the fastening member.

Fourth, since mortar panel, FRP panel, etc. can be used as a permanent formwork panel, it is resistant to corrosion and fire, and the coupling rail of the permanent formwork panel reinforces rigidity, thereby minimizing the thickness of the permanent formwork panel to reduce its own weight.

Fifth, since construction work for formwork support or formwork demoulding is unnecessary, excellent workability and economical efficiency can be achieved.

Sixth, the permanent formwork panel can be applied to the steel concrete composite member coupled to the plurality of lateral support members on the outside of the cast steel, it can be applied to various members such as walls, columns, beams.

1 is a perspective view of a pre-assembled steel frame assembly.
Figure 2 is a perspective view showing a coupling state of the permanent formwork panel and the transverse support member.
3 is a perspective view showing a coupling relationship between a permanent formwork panel and a transverse support member;
4 is a plan sectional view showing a state in which corner beads are coupled by fastening members at member edges.
5 is a perspective view illustrating a state in which corner beads are coupled to member edges.
6 to 10 are diagrams illustrating the installation process of the corner beads.
6 is a view showing a process in which the transverse support member is coupled to one side permanent formwork panel.
7 is a view showing a process in which the lateral support member is coupled to the other permanent formwork panel.
8 is a view illustrating a process of installing a corner bead in the corner where the neighboring permanent formwork panel meets.
9 is a view showing a process of fixing a corner bead with a fastening member.
10 is a diagram illustrating a state in which corner beads are installed.
The perspective view which shows the expansion part which can be inserted in the fastening hole of a corner bead.
12 is a side sectional view showing a permanent formwork panel to which a fireproof material is applied.
Fig. 13 is a perspective view showing an embodiment of the lateral support member.

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

1 is a perspective view of a pre-assembled steel frame assembly, Figure 2 is a perspective view showing a coupling state of the permanent formwork panel and the transverse support member, Figure 3 is a perspective view showing a coupling relationship of the permanent formwork panel and the transverse support member.

As shown in Figure 2 and 3, the fixed structure of the present invention pre-assembled steel frame assembly and permanent formwork panel is cast steel (11) disposed on each corner of the member and the cast steel (outside the cast steel 11) 11) the pre-assembled steel frame assembly (1) and the lateral support member for the steel concrete composite member is composed of a lateral support member 12 is bent vertically bent toward the outside of the member to be joined in a direction orthogonal to the member It relates to a fixed structure of the permanent formwork panel (2) coupled to (12), the permanent formwork panel (2) is a plate-shaped panel body 21 and the transverse support member 12 on one surface of the panel body (21) ) Is arranged in the same direction as the coupling groove 221 is formed in the longitudinal direction of the coupling groove 221 is inserted into one leg 121 of the lateral support member 12, the permanent formwork panel adjacent ( At the corner where 2) ends meet, corner beads (3) Characterized in that the coupling assembly in the longitudinal direction of the steel assembly (1).

The present invention relates to a fixed structure of the pre-fabricated steel assembly and the permanent formwork panel, which can fix the permanent formwork panel (2) to the pre-assembled steel frame assembly (1) by a simple method without a separate fastening member.

As shown in FIG. 1, the pre-assembled steel frame assembly 1 is composed of a cast steel 11 and a lateral support member 12 to be combined with concrete to exhibit both advantages of concrete and steel frame.

In Figure 1, the cast steel 11 is used a-shaped steel, but is not limited to this can be applied to a member of various cross-sectional shape.

The cast steel 11 is disposed at each corner of the member.

Here, the member may be a beam or a wall as well as a pillar, and the present invention is widely applicable to a member such as a pillar, a beam, a wall, and the like.

The lateral support member 12 is disposed outside the cast steel 11 in a direction orthogonal to the cast steel 11 so as to connect the adjacent cast steel 11.

One side leg 121 of the lateral support member 12 is vertically bent toward the outside of the member.

The other leg 122 of the lateral support member 12 may be coupled to the cast steel 11 by bolting or the like.

A plurality of the horizontal support member 12 may be disposed to be spaced apart from each other.

The permanent formwork panel 2 is composed of a panel body 21 and a coupling rail 22.

The panel body 21 has a plate shape and faces the outside of the member.

The coupling rail 22 is disposed on one surface of the panel body 21 in the same direction as the lateral support member 12.

The coupling rail 22 has a coupling groove 221 into which one leg 121 of the lateral support member 12 is inserted in a longitudinal direction.

The coupling rail 22 of the permanent formwork panel 2 is coupled to and supported by one leg 121 of the lateral support member 12 over its entire width. Accordingly, the permanent formwork panel (2) can be firmly coupled to the pre-assembled steel frame assembly (1) is advantageous for the side pressure support.

In addition, there is no need for a separate member such as a bolt or screw to couple the permanent formwork panel 2 to the pre-assembled steel frame assembly 1, and the construction is convenient.

The coupling rail 22 is used not only for coupling with the lateral support member 12 but also serves to reinforce the rigidity of the panel main body 21, so that the thickness of the panel main body 21 can be minimized and economical.

The coupling rail 22 is preferably provided with at least two rows for stable support.

The coupling rail 22 may be located in plural numbers at the same interval as that of the horizontal support member 12.

Since the permanent formwork panel 2 has a constant cross-sectional shape, it can be manufactured by various methods such as extrusion, injection, and drawing.

In particular, when a fireproof treatment is required in the steel concrete composite member, if the fireproof panel is a permanent formwork panel 2, a separate fireproof work can be omitted. At this time, the permanent formwork panel 2 can be used mortar panels, FRP panels and the like.

As shown in FIG. 4 and the like, in the present invention, the corner bead 3 is coupled in the longitudinal direction of the pre-assembled steel frame assembly 1 at an edge where the end portions of the neighboring permanent formwork panels 2 meet.

The permanent formwork panel 2 is coupled to the side of the pre-assembled steel frame assembly 1 in a sliding manner at one end of the lateral support member 12. In this case, when slidingly joining the permanent formwork panel 2, mutual interference with the end of the permanent formwork panel 2 on the other side installed first should not occur.

Accordingly, the width of any one of the permanent formwork panels 2 adjacent to each corner of the member is formed to be as long as the thickness of the other formwork panel 2 to cover the end of the other permanent formwork panel 2. If formed so as to be able to slide all the permanent formwork panel 2 in sequence without generating a space between the adjacent permanent formwork panel (2) in the corner.

After that, the end can be fixed by coupling an angle member to the corner where the permanent mold panel 2 meets.

However, as shown in FIG. 4, when the permanent formwork panels 2 and 2 'on both sides of the corners are symmetrically assembled, the permanent formwork panels 2 and 2' may be prevented from interfering with the ends of the permanent formwork panels 2 and 2 '. 2 ') may cause a certain space in the corner portion of the member.

In this case, the corner bead 3 may be installed in the corner space to close the corner space.

In addition, the edge where the permanent formwork panels (2, 2 ') meet when pour concrete is weak due to the concentrated side pressure.

Therefore, the corner bead (3) is coupled to the site where the neighboring permanent formwork panels (2, 2 ') meet to be able to resist the corner side pressure.

The corner beads 3 restrain the ends of the permanent formwork panel 2 at the member edges so that the slidingly coupled permanent formwork panels 2, 2 ′ do not escape.

The corner beads 3 may be manufactured using various materials such as metal and synthetic resin, and preferably formed of the same material as the permanent formwork panel 2. And the thickness of the corner bead 3 is preferably formed to the same thickness as the panel body 21 of the permanent formwork panel (2).

The corner bead 3 may be formed in a '-shape' along the corner shape of the member, and the outer edge of the corner bead 3 is preferably chamfered to protect the corner of the member.

2, 3, etc., an enlarged portion 123 having an enlarged cross section is formed at an outer end of one leg 121 of the lateral support member 12, and an inner end of the coupling groove 221. The expansion groove 123 is inserted into the fixing groove portion 222 is formed, the permanent mold panel 2 may be configured to be slidingly coupled at one end of the horizontal support member (12).

The enlarged portion 123 may have any cross-sectional shape as long as the enlarged portion 123 is thicker than the thickness of one leg 121 of the lateral support member 12.

When using the conventional a-shaped steel as the lateral support member 12, the enlarged portion 123 may be formed by welding a steel bar having a diameter larger than the thickness of one leg 121 to the outer end of one leg 121. have. In this case, production costs can be reduced.

The fixing groove 222 is formed in a shape corresponding to the enlarged portion 123.

Accordingly, the enlarged portion 123 and the one leg 121 of the lateral support member 12 can be easily and firmly coupled to the fixing groove 222 and the coupling groove 221 of the coupling rail 22.

Permanent formwork panel (2) is easy while the enlarged portion 123 and one side leg 121 of the lateral support member 12 is easily coupled to the fixing groove 222 and the coupling groove 221 of the coupling rail 22 In order to fix firmly so as not to move, the clearance between the coupling groove 221 and one side leg 121, the enlarged portion 123 and the fixing groove 222 is preferably about 1 mm.

For example, when the lateral support member 12 is a-shaped steel having a thickness of 3.2 mm, the width of the coupling groove 221 is about 5 mm.

And when using the steel rod of 12mm diameter as the enlarged portion 123, the diameter of the fixing groove 222 is about 14mm is appropriate.

4 is a plan sectional view illustrating a state in which corner beads are coupled by fastening members at member edges, and FIG. 5 is a perspective view illustrating a state in which corner beads are coupled to member edges.

As shown in FIG. 4, FIG. 5, etc., the corner beads 3 are enlarged portions of the lateral support members 12 by the fastening members 4 penetrating the fastening holes 31 formed in the corner beads 3. 123) can be fixed to the end.

The corner beads 3 can be fixed to the enlarged portion 123 of the lateral support member 12 instead of the neighboring permanent formwork panels 2 and 2 '.

Accordingly, since the corner bead 3 is supported by the rigid support member 12, the corner bead 3 can be firmly fixed.

The corner bead 3 may be easily coupled to the enlarged portion 123 of the lateral support member 12 by a fastening member 4 such as a bolt.

As shown in Figure 4, 5, etc., the fastening holes 31 of the corner bead 3 may be alternately arranged up and down each other on both sides. Accordingly, the corner bead 3 can be fixed to both the enlarged portions 123 and 123 'of the lateral support members 12 and 12' located on both sides adjacent to each other.

Therefore, it can effectively resist concrete pouring pressure.

A fastening groove 124 having a female thread formed on an inner circumferential surface thereof is formed at the end of the enlarged portion 123 in the longitudinal direction of the enlarged portion 123, and an end of the fastening member 4 is screwed to the fastening groove 124. It can be configured to.

When the enlarged portion 123 is a steel bar, the fastening groove 124 may be formed at an end portion of the steel bar at a predetermined depth. At this time, the internal thread surface of the fastening groove 124 may be tapped to use a female thread.

In addition, the enlarged portion 123 may use a small diameter steel pipe pipe.

The fastening member 4 may use a bolt or the like, and may be screwed into the fastening groove 124 formed at the end of the enlarged portion 123 to be fixed.

That is, the fastening member 4, which is a bolt at the outside of the corner bead 3, may be screwed into the fastening groove 124 through the fastening hole 31 of the corner bead 3.

Thereby, the corner bead 3 can be firmly installed and fixed very easily.

In order to prevent the head of the bolt from protruding to the outside of the corner bead 3, the fastening hole 31 is preferably configured so that the head of the bolt is caught by expanding the outer end.

As illustrated in FIGS. 2 and 4, one or both ends of the enlarged portion 123 may be formed longer than one leg 121 of the lateral support member 12.

When the enlarged portion 123 is formed to be longer than the length of one leg 121 of the lateral support member 12, the enlarged portion 123 protruding when the permanent formwork panel 2 is coupled may serve as a guide. That is, the permanent mold panel 2 can be positioned by inserting the fixing groove 222 of the permanent mold panel 2 by the enlarged portion 123. Accordingly, the position of the permanent formwork panel 2 is first set, and then the permanent formwork panel 2 can be slidably moved.

In addition, the required length of the fastening member 4 for coupling the corner bead 3 can be reduced, and the length of the lateral support member 12 can also be reduced, thereby reducing the amount of steel.

6 to 10 is a view showing the installation process of the corner bead, Figure 6 is a view showing a process in which the lateral support member is coupled to one permanent formwork panel, Figure 7 is a lateral support member in the other permanent formwork panel 8 is a view illustrating a process of being coupled, and FIG. 8 is a view illustrating a process of installing corner beads at a corner where neighboring permanent formwork panels meet. 9 is a view illustrating a process of fixing a corner bead with a fastening member, and FIG. 10 is a view illustrating a state in which corner beads are installed.

A process of installing the corner beads will be described with reference to FIGS. 6 to 10.

First, as shown in FIG. 6, the permanent formwork panel 2 on one side is coupled to the lateral support member 12.

The one side permanent formwork panel 2 is coupled to the side of the pre-assembled steel frame assembly 1 in a sliding manner at one end of the one side of the horizontal support member 12, along one leg 121 of the horizontal support member 12 The coupling groove 221 formed in the coupling rail 22 of the permanent formwork panel 2 is inserted.

Next, as shown in Figure 7, the permanent formwork panel 2 'of the other side is coupled to the other side supporting member 12'.

Subsequently, as shown in FIG. 8, the corner beads 3 are installed in the longitudinal direction of the pre-assembled steel frame assembly 1 at the corners where the neighboring permanent formwork panels 2 and 2 ′ meet.

The corner bead 3 closes the corner space where the neighboring permanent formwork panels 2 and 2 'meet, and prevents detachment of the permanent formwork panels 2 and 2' by resisting the concrete side pressure at the member edges.

And as shown in FIG. 9, the corner bead 3 is fixed with the fastening member 4, and installation of the corner bead 3 is completed (FIG. 10).

The fastening member 4 may use a bolt, and screws into a fastening groove 124 formed at an end of the enlarged portion 123 of the lateral support member 12 by penetrating the fastening hole 31 of the corner bead 3. Can be combined.

It is a perspective view which shows the expansion part which can be inserted in the fastening hole of a corner bead.

As shown in FIG. 11, one end of the enlarged part 123 protrudes out of the end portion of the coupling rail 22 of the permanent formwork panel 2 to be inserted into the fastening hole 31 of the corner bead 3. Can be.

Accordingly, when the corner bead 3 is coupled, the enlarged portion 123 is fastened to the corner bead 3 when one end of the enlarged portion 123 protrudes out of the end portion of the coupling rail 22 of the permanent formwork panel 2. The corner bead 3 may be temporarily coupled by being inserted into the ball 31.

Therefore, since the fastening member 4 can be fastened in the state where the position of the corner bead 3 is fixed, installation of the corner bead 3 and fastening of the fastening member 4 are easy.

On the other hand, when one end of the enlarged portion 123 respectively protrudes on both sides of the corner bead 3, the assembly of the corner bead 3 itself is difficult. Therefore, the enlarged portion 123 should be formed to protrude only on one side enlarged portion 123 of the corner bead (3).

12 is a side sectional view showing a permanent formwork panel to which a fireproof material is applied.

As shown in FIG. 12, a fireproof material 25 may be applied to the inner surface of the permanent formwork panel 2.

When the permanent formwork panel 2 is formed of mortar or the like, fire resistance may be somewhat insufficient.

However, when the high-strength concrete member is used, the high-strength concrete has a dense internal structure, causing a bursting phenomenon that bursts as high pressure water vapor is not blown out when the fire occurs.

In particular, although the column has a number of advantages in the use of high-strength concrete due to the increase in the vertical load, it is difficult to use a strength of 50MPa or more unless a separate measure such as PP fiber is mixed due to the fear of explosion.

Therefore, by applying the refractory material 25 to the inner surface of the permanent formwork panel 2 in advance by spraying, it can be configured to improve the fire resistance performance of the concrete structure and prevent the explosion of the concrete 13.

In this case, there is no need for a separate field work for securing fire resistance performance.

13 is a perspective view showing an embodiment of the lateral support member.

As shown in FIG. 13, the enlarged portion 123 may be formed by bending the outer end of the one leg 121 in a circular shape.

The enlarged portion 123 may be formed by welding a separate steel rod or pipe pipe as described above, but may be integrally formed by bending the end portion of one leg 121 roundly as shown in FIG. 13.

In this case, there is no need for a separate welding process for forming the enlarged part 123 and there is no need to form the fastening groove 124.

1: pre-assembled steel assembly
11: cast steel
12: lateral support member
121: one leg
122: the other leg
123: enlargement
124: fastening groove
13: concrete
2: permanent formwork panel
21: panel body
22: combined rail
221: coupling groove
222: fixing groove
25: fireproof material
3: corner bead
31: fastener
4: fastening member

Claims (8)

It is coupled to the cast steel 11 and the cast steel 11 in the direction orthogonal to the outside of the cast steel 11 disposed at each corner of the member, the one side leg 121 is vertically bent toward the outside of the member Regarding the fixing structure of the pre-assembled steel frame assembly (1) for steel concrete composite member composed of the support member 12 and the permanent formwork panel (2) coupled to the transverse support member (12),
The permanent formwork panel 2 is disposed in the same direction as the transverse support member 12 on one side of the panel-shaped panel body 21 and the panel body 21, one leg of the transverse support member 12 ( The coupling groove 221 is inserted into the 121 is composed of a coupling rail 22 is formed in the longitudinal direction,
Corner bead (3) is coupled to the edge of the adjacent permanent formwork panel (2) in the longitudinal direction of the pre-assembly steel assembly (1),
An enlarged portion 123 having an enlarged cross section is formed at an outer end of one side leg 121 of the lateral support member 12, and an enlarged portion 123 is inserted and engaged at an inner end of the coupling groove 221. Groove 222 is formed, the permanent formwork panel 2 is slidingly coupled at one end of the lateral support member 12,
At the end of the enlarged portion 123, a fastening groove 124 having a female thread formed on an inner circumferential surface thereof is formed in the longitudinal direction of the enlarged portion 123,
The corner bead 3 extends 123 of the lateral support member 12 by a fastening member 4 which is penetrated through the fastening hole 31 formed in the corner bead 3 and screwed into the fastening groove 124. Fixing structure of the pre-assembled steel frame assembly and the permanent formwork panel, characterized in that fixed to the end.
In claim 1,
One end or both ends of the enlarged portion 123 is longer than one leg 121 of the lateral support member 12, characterized in that the structure of the pre-assembly steel assembly and permanent formwork panel.
In claim 2,
One end of the enlarged portion 123 protrudes outward from the end of the coupling rail 22 of the permanent formwork panel 2 and is inserted into the fastening hole 31 of the corner bead 3. Fixed structure of formwork panels.
In claim 1,
The inner structure of the permanent formwork panel 2, the refractory material 25 is applied, characterized in that the fixed structure of the pre-assembled steel frame assembly and the permanent formwork panel.
In claim 1,
The enlarged portion 123 is fixed structure of the pre-assembled steel frame assembly and the permanent formwork panel, characterized in that formed by bending the outer end of one leg 121 in a circular shape. delete delete delete

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