JP6330163B2 - Construction method of earthquake-resistant slit material - Google Patents

Description

The present invention relates to a construction method for attaching an earthquake-resistant slit material embedded in a wall or the like of a concrete building to a formwork.

  In concrete buildings such as reinforced concrete and steel-framed reinforced concrete, there is a technology to create structurally separated parts (earthquake-resistant slits) by embedding earthquake-resistant slit materials in the transverse direction of the wall to prevent destruction due to earthquake shaking. Are known. For that purpose, it is necessary to attach an earthquake-resistant slit material to a concrete formwork in advance. As shown in FIG. 7, the seismic slit material is attached to a joint 91 with a fixing tool N such as a nail. The joint rod M is fixed to both ends of the slit material main body 95. A technique in which the groove portions of the support members 93 and 94 attached to the portions are fitted and attached is widely used (see, for example, Patent Document 1 below).

  However, according to the mounting structure shown in FIG. 7, since the joint rod M is fixed to the mold frame only by the fixture N, when the concrete is placed in the space S, the fixture N is caused by the pressure of the poured concrete. There is a problem that the support members 93 and 94 and the slit material body 95 are moved from a predetermined position due to falling off (generally called “puncture phenomenon”). For this reason, it is necessary to increase the number of fixing points by narrowing the interval (pitch) between the fixing tools driven into one joint rod M, or to reinforce it with another fixing means, resulting in an increase in work processes.

  Therefore, as a countermeasure for preventing the “puncture phenomenon”, a technique of sandwiching a part of the joint rod between the molds is also known. For example, Patent Document 2 below discloses a technique in which a support plate 4b is provided on a fixing member 4 (joint rod) and sandwiched between molds. Patent Document 3 below discloses a technique for sandwiching a joint portion forming jig 13 (joint rod) that is assembled in advance with an earthquake-resistant slit material in a mold.

JP 2002-194920 A JP 2001-214634 A JP-A-10-317666

In the technique shown in Patent Document 2, since the portion (support plate 4b) sandwiched between the molds is formed thinner than the other portions of the fixing member 4, it is easily deformed, and there is anxiety in terms of strength and durability. is there. Moreover, since the positioning part 19 is provided in the fixing member 4, there exists a problem that concrete tends to enter between the positioning part 19 and the formwork surface, and it is easy to cause a construction defect.
Further, in the technique disclosed in Patent Document 3, it is necessary to work by previously assembling the joint portion forming jig 13, the fixing jig 14, and the slit member 12 with bolts, so that the work process is increased. There's a problem.

  The problem of the present invention is that the seismic slit material is firmly fixed to the formwork to prevent the “puncture phenomenon”, the work process can be greatly simplified, and the concrete surface can be finished with certainty. It is in providing the attachment structure of a slit material, and its construction method.

In order to solve the above-described problems, an earthquake-resistant slit material mounting structure according to the present invention includes a first and second mold frame structures 1 and 2 installed opposite to each other, and a horizontal cross section between the mold frame structures. In the formwork structure provided with the seismic slit material 4 arranged, the seismic slit material 4 is attached. The first and second formwork structures 1 and 2 are a plurality of formwork installed side by side. , Each having a slit bar 3 fixed between the molds 10A, 10B (20A, 20B) at the attachment position of the earthquake-resistant slit material 4, and each mold is provided on the mold plate 11 and the outer surface thereof. A plurality of fixed formwork piers 12 are provided. The cross-sectional shape of each slit pier 3 includes a top surface 3a, a bottom surface 3d parallel to the top surface, and two side surfaces 3c and 3c ′ perpendicular to the bottom surface. , Two inclined surfaces 3b inclined in a C shape from the top surface toward each side surface 3b 'to form a hexagonal shape in which the trapezoidal part and the square part are integrated, and each slit bar 3 projects the trapezoidal part toward the inside of the formwork, and the square part is Arranged in a state sandwiched between adjacent molds 10A, 10B (20A, 20B) ,
Both side surfaces of the slit pier 3 are respectively connected by the nails 8 driven in parallel to the wall body in a state where they are brought into contact with the chamfer surface of the adjacent mold frame 11 and the side surface of the mold pier 12. It is fixed to the formwork pier 12,
The earthquake-resistant slit material 4 has a plate-shaped slit material body 7 and a pair of support members 5 and 6, and each support member has inner groove portions 51 and 61 and outer groove portions 52 and 62. Both ends of the slit material main body 7 are fitted into 51 and 61, and the trapezoidal part of each slit bar 3 is fitted into the outer grooves 52 and 62.

And the construction method of the earthquake-resistant slit material which concerns on this invention is the 1st and 2nd formwork structures 1 and 2 installed facing, and the earthquake-proof slit arrange | positioned transversely between the said formwork structures It is a construction method of the seismic slit material 4 in the formwork structure having the material 4, and the first and second formwork structures 1 and 2 are formed by arranging a plurality of formwork and the seismic slit material 4. Each has a slit crosspiece 3 fixed between the molds 10A, 10B (20A, 20B) at the mounting position. and a frame桟木12, each slit桟木3 is made of wood, its cross-sectional shape, the top face 3a and a bottom face 3d parallel to the top surface, perpendicular to the bottom surface two sides 3c, 3c 'and two inclined surfaces inclined in a C shape from the top surface toward each side surface 3b and 3b ′, the trapezoidal part and the rectangular part are integrated into a hexagonal shape. The earthquake-resistant slit material 4 includes a plate-like slit body 7 and a pair of support members 5 and 6. Each supporting member 5, 6 has inner groove portions 51, 61 and outer groove portions 52, 62, and both end portions of the slit body 7 are fitted in the inner groove portions 51, 61 of each supporting member 5, 6 in advance. In the construction method, after installing one mold 10A, the slit bar 3 is arranged so that the trapezoidal part faces the inside of the mold, and one of the slit bars 3 is arranged. Side surface 3c is brought into contact with the chamfer surface of the mold plate 11 of the one mold 10A and the side surface of the mold frame 12, and a nail 8A is driven in parallel with the wall body, thereby the slit frame 3 is A first step of fixing to the mold 10A, and the other of the slit pier 3 The side face 3c ′ is brought into contact with the chamfer surface of the formwork plate 11 of the other formwork 10B and the side face of the formwork pier 12 so that the nail 8B is parallel to the wall body from the formwork pier 12 side toward the slit pier 3. by implanting, and a second step of fixing the other mold 10B to the slit桟木3, a first mold structure installation step, said protruding from said first mold structure 1 A step of installing the seismic slit material including the step of attaching and fixing the outer groove 52 of one support member 5 of the seismic slit material 4 to the trapezoidal part of the slit pier 3 and the other support of the seismic slit material 4 fixed. The trapezoidal portion of the new slit pier 3 is fitted into the outer groove 62 of the member 6 for positioning, and one side surface 3c of the new slit pier 3 is opposed to the first formwork structure 1. Mold of one formwork 20A to be arranged A first step of fixing the new slitting frame 3 to the one formwork 20A by bringing the nail 8C into contact with the wooden mouth surface of the frame plate 11 and the side surface of the formwork frame 12 and driving in parallel with the wall body. Then, the other side surface 3c ′ of the new slit frame 3 is brought into contact with the chamfer surface of the mold plate 11 of the other mold 20B and the side surface of the mold frame 12, and the slit frame 3 from the mold frame 12 side. by implanting wall parallel to the nail 8D toward includes a second step consisting of a second mold structure installation step of fixing the other mold 20B to a new slit桟木3 wherein It is characterized by that.

  Moreover, it is desirable that the slit pier is previously coated with a colored resin film.

  According to the present invention, the installation work of the formwork and the fixing work of the slit pier (equivalent to the conventional joint rod) are performed at the same time, so that the installation position of the slit pier can be determined correctly and the work process is remarkably simplified. can do. Moreover, since the pressure of the poured concrete is received by the whole formwork through the slit pier, there is no possibility that the earthquake-resistant slit material moves, and the “puncture phenomenon” can be surely prevented. Furthermore, there is no possibility that a gap is generated between the slit bar and the formwork, and it is possible to eliminate the concrete construction failure.

 Further, when the slit pier is covered with a resin film, the strength and durability of the slit pier are improved and the adhesion of concrete can be prevented. Furthermore, by using a colored resin film, there is an effect that visibility is improved and it is easy to work in a dark place.

It is a disassembled perspective view of the attachment structure of the earthquake-resistant slit material which concerns on this invention. It is sectional drawing of the attachment structure of the earthquake-resistant slit material which concerns on this invention. It is sectional drawing which shows the installation process of a 1st formwork structure. It is sectional drawing which shows the installation process (continuation) of a 1st formwork structure. 1 is an enlarged cross-sectional view of a slit pier in Example 1. FIG. It is an expanded sectional view of a slit pier in Example 2. It is sectional drawing of the attachment structure of a prior art example.

  Hereinafter, Example 1 of the present invention will be described in detail with reference to the drawings.

  In this embodiment, as shown in FIGS. 1 and 2, the concrete formwork is a first formwork structure 1 and a first formwork that are installed facing each other at a predetermined interval to form a wall or the like. A second formwork structure 2 and a seismic slit material 4 installed across the concrete placement space S therebetween are provided.

  As shown in FIG. 2, the earthquake-resistant slit material 4 includes a pair of support members 5 formed of hard resin (vinyl chloride or the like) at both ends of a plate-like slit material body 7 made of foamed resin (polyethylene foam or the like). , 6 are integrated and an off-the-shelf product marketed under a name such as “seismic slit material” can also be used.

  Each of the support members 5 and 6 has a long shape and includes inner groove portions 51 and 61 and outer groove portions 52 and 62. Among these, the inner groove portions 51 and 61 are formed in a substantially U shape so that the end portion of the slit material body 7 can be fitted, and the outer groove portions 52 and 62 fit the slit pier 3 described later. It is substantially tapered so that it can be made. And before performing construction work on the spot, both ends of the slit material body 7 are fitted into the inner grooves 51 and 61 of the support members 5 and 6 and integrated in advance. Reference numeral 71 denotes a rock wool material filled as a refractory material.

  Each of the first mold structure 1 and the second mold structure 2 includes a plurality of molds 10A, 10B,..., 20A, 20B. They are arranged side by side and fixed by a fixture 8 such as a nail (hereinafter, the molds that are constituent elements of the first mold structure 1 are collectively referred to as “form 10”, the second mold The molds that are the components of the frame structure 2 are collectively referred to as “mold 20”). In order to simplify the description, in FIGS. 1 to 4, only the main part of one slit crosspiece and two adjacent molds is shown for each of the mold structures 1 and 2. A plurality of molds are arranged continuously. Further, at the portion where the wall body is in contact with the column or beam, the mold is also arranged so as to have a shape corresponding thereto. However, since this point is the same as the conventional one, detailed description is omitted.

  Forms 10 and 20 constituting the first and second formwork structures 1 and 2 are a formwork plate 11 made of plywood and the like, and a plurality of formwork bridges 12 fixed to the back surface (outer side) thereof. It has. The formwork pier 12 is fixed to both end portions of the formwork plate 11 and the middle portion thereof with a gap (FIG. 2).

  Next, the slit pier 3 which is a feature of the present invention will be described. The slit pier 3 corresponds to a conventional joint rod, and is used to attach the seismic slit material 4. The material is preferably made of wood such as lauan, but is not limited thereto. As shown in FIG. 5, the cross-sectional shape of the slit pier 3 includes a top surface 3a, a bottom surface 3d parallel to the top surface, two side surfaces 3c and 3c ′ perpendicular to the bottom surface, and from the top surface toward each side surface. It has two inclined surfaces 3b and 3b 'inclined in a C shape, and has a hexagonal shape in which a trapezoidal part and a square part are integrated. An example of the size of each part of the slit bar 3 is shown in FIG. 5 (unit: mm). When the width dimension W of the bottom surface 3d of the slit bar 3 is 25 mm, it can be used for the construction of the earthquake-resistant slit material 4 having a width of about 25 to 40 mm depending on the specifications of the support members 5 and 6. . Moreover, the height (length of the side surfaces 3c, 3c ′) L of the rectangular part of the slit bar 3 is the thickness dimension of the molds 10, 20 (the form plate 11 and the form bar), as is apparent from FIG. It is desirable to match the total thickness of 12).

  As shown in FIG. 2, in any of the first and second formwork structures 1 and 2, the slit crosspiece 3 is between the adjacent left and right formwork 10A, 10B with the trapezoidal part facing inward. And 20A and 20B, and a rectangular portion is sandwiched between them and fixed. And the trapezoid part of each slit tree 3 respond | corresponds to the attachment position of the earthquake-resistant slit material 4, and when each trapezoid part fits the outer groove parts 52 and 62 of each support member 5,6, the earthquake-resistant slit material 4 is provided. Are attached to the formwork structures 1 and 2.

  Normally, the attachment position of the earthquake-resistant slit material 4 is determined in advance at the design stage of the building. Therefore, the operator confirms the position of the earthquake-resistant slit material 4 in advance with a structural drawing or the like, and the width dimensions (walls) of the molds 10 and 20 so that the position of the slit bar 3 matches the mounting position of the earthquake-resistant slit material 4. Process the body length dimension). Thereby, in the field, the installation position of the earthquake-resistant slit material 4 can be accurately determined only by arranging the formwork and the slit piercing 3 side by side.

  Although illustration is omitted, in the concrete placing space S, a reinforcing bar and a steel frame are arranged, and a separator and the like for maintaining a constant interval between the molds are installed.

  Next, the construction method of the earthquake-resistant slit material 4 of the present embodiment will be described in detail with reference to FIGS.

(Installation work of the first formwork structure)
First, the formwork 10 which comprises the 1st formwork structure 1 is installed side by side in the length direction of a wall body. And if the attachment position of the earthquake-resistant slit material 4 is reached | attained, the slit crosspiece 3 will be fixed between mold forms with the following procedures.

  First, as shown in FIG. 3, with the trapezoidal part facing inward, the slit bar 3 is disposed adjacent to the one mold 10A previously installed, and one side surface 3c of the slit bar 3 is disposed. The formwork plate 11 of the formwork 10A is brought into contact with the side surface of the formwork pier 12 and the side face of the formwork frame 12. In this state, the slit bar 3 is fixed to the mold 10A by driving a nail 8A (fixing tool) parallel to the wall body (that is, in the length direction of the wall body) (first step). At that time, the nail 8A may be driven from the side of the formwork pier 12 toward the slit pier 3 as shown in FIG. 3, or conversely, may be driven from the side of the slit pier 3 toward the formwork pier 12; As shown in FIG. 3, since the surface driven from the side of the formwork pier 12 has no risk of scratches (scratches) on the surface of the slit pier 3, the slit pier 3 can be made to last longer.

  Next, as shown in FIG. 4, another mold frame 10B is arranged adjacent to the slit frame 3 fixed earlier, and the side of the mold plate 11 and the frame frame 12 of the mold plate 11 of the mold frame 10B. Is brought into contact with the other side surface 3c ′ of the slit bar 3. In this state, the other mold 10B is fixed to the slit pier 3 by driving a nail 8B in parallel to the wall body from the mold pier 12 toward the slit pier 3 (second step). Thereby, since the square part of the slit pier 3 is firmly fixed in a state where both sides are sandwiched between the molds 10A and 10B, there is no need to worry about the pitch at which the nails are driven. In addition, since the nail can be driven while supporting the slit pier with one hand, even one worker can easily perform the fixing work.

  Thereafter, a new mold (not shown) is placed adjacent to the mold 10B. When the remaining formwork is installed in the same procedure and the position where the seismic slit material 4 is attached is reached again, the slit pier 3 is placed between the formwork in the same procedure as the first step and the second step. To fix. When the installation work of the formwork structure 1 is completed, predetermined reinforcing bars and steel frames are arranged and fixed in the concrete placement space S (not shown).

(Installation work of earthquake-resistant slit material)
In the state where the installation work of the first formwork structure 1 has been completed, the trapezoidal portion of the slit piercing 3 protrudes inward from the surface of the formwork (FIG. 4), and this corresponds to the mounting position of the earthquake-resistant slit material 4. . Then, an operator fits and fixes the outer side groove part 52 of the supporting member 5 attached to the edge part of the earthquake-resistant slit material 4 to the trapezoid part of the slit piercing 3. As described above, since the slit material body 7 and the support members 5 and 6 are integrated in advance, this completes the installation work of the seismic slit material 4 itself (the state shown in FIG. 1 is reached). .

(Installation work of the second formwork structure)
Subsequently, the formwork 20 constituting the second formwork structure 2 is placed side by side in the length direction of the wall so as to face the first formwork structure 1. Then, when the attachment position of the earthquake-resistant slit material 4 is reached, the slit bar 3 is fixed between the molds by the following procedure (see the lower slit bar 3 and the molds 20A and 20B in FIG. 2).

  First, the slit pier 3 is arranged adjacent to the one mold 20A previously installed with the trapezoidal portion facing the inside of the mold. At this time, since the outer groove portion 62 of the support member 6 of the earthquake-resistant slit material 4 previously installed is located near the trapezoidal portion of the slit pier 3, the trapezoidal portion is fitted into the outer groove portion 62 for positioning. The nail 8C is driven in parallel with the wall body in a state where one side surface 3c ′ of the slit frame 3 is brought into contact with the chamfer surface of the mold plate 11 of the mold frame 20A and the side surface of the frame frame 12. Thus, the slit bar 3 is fixed to the mold 20A (first step). Also in this case, the nail 8C can be prevented from being scratched on the surface of the slit pier 3 if it is driven toward the slit pier 3 from the form pier 12 side. In the above description, the slit frame 3 is arranged next to the first frame 20A after the first frame 20A is installed. The mold 20A may be installed.

  Next, another mold frame 20B is arranged adjacent to the slit frame 3 fixed earlier, and the side of the mold plate 11 and the frame frame 12 of the mold frame 11 of the mold frame 20B are connected to the other side of the slit frame 3. The other mold 20B is fixed to the slit pier 3 by driving a nail 8D in parallel with the wall body from the side of the mold pier 12 toward the slit pier 3 in a state of being in contact with the side surface 3c of the second rim 3c. Process). As a result, the rectangular portion of the slit pier 3 is sandwiched between the molds 20A and 20B and is firmly fixed, so there is no need to worry about the pitch for driving nails. Further, since the operator can drive the nail while standing on the outside of the formwork while supporting the slit pier with one hand, one person can easily perform the fixing work.

  Thereafter, a new formwork (not shown) is placed adjacent to the previously placed formwork 20B. When the remaining formwork is installed in the same procedure and the position where the seismic slit material 4 is attached is reached again, the slit pier 3 is placed between the formwork in the same procedure as the first step and the second step. To fix.

(Concrete placement and curing)
When the installation work of the second formwork structure 2 is completed, concrete is placed in the space S. At this time, the pressure of the poured concrete is transmitted to the slit pier 3 via the support members 5 and 6, but the rectangular portion of the slit pier 3 is sandwiched between the molds 10A, 10B and 20A, 20B. There is no risk of dropping off even under strong pressure. Moreover, since there is no possibility that a gap is generated between the slit pier 3 and the formwork, the concrete can be reliably filled.

  After the concrete is placed, in order to remove the bubbles in the concrete and fill the corners of the concrete, work is performed on the formwork structures 1 and 2 with a vibrator or a mallet. At this time, the peripheral portion of the earthquake-resistant slit material 4 is prone to construction failure, so it is particularly necessary to carefully vibrate. However, in the present invention, the bottom surface 3d of the slit pier 3 is exposed to the outside of the formwork structures 1 and 2 and the seismic slit material 4 is located on the inside thereof (see FIG. 2). Even without looking into the inside of the formwork, the position where the seismic slit material 4 is embedded can be visually recognized from the outside by using the bottom surface 3d of the slit bar 3 as a mark. Therefore, the operator can surely fill the concrete around the seismic slit material 4 by giving the vibration mainly to the peripheral portion of the bottom surface 3d.

  After curing for a certain period, the mold structures 1 and 2 (the molds 10 and 20 and the slit bar 3) are disassembled and removed. At this time, the earthquake-resistant slit material 4 (support members 5 and 6 and slit material body 7) is embedded in the concrete wall, and only the outer grooves 52 and 62 of the support members 5 and 6 are exposed to the outside to form joints. To do. Then, construction of the concrete wall provided with the earthquake-resistant slit is completed by constructing a sealing material on the joint. The removed molds 10 and 20 and the slit bar 3 can be used repeatedly.

Next, the effect obtained by Example 1 is demonstrated.
(1) At the same time as the installation work of the mold structures 1 and 2, the slit pier 3 as the attachment part of the seismic slit material 4 can be fixed, so that the installation position of the seismic slit material 4 is accurately determined and the installation position. There is no risk of mistakes.
(2) The installation work of the mold and the slit pier 3 and the installation work of the seismic slit material 4 to the slit pier 3 can be performed by one person, and the work process is remarkably simplified.
(3) Since the square part of the slit pier 3 is sandwiched and fixed between the molds, the seismic slit material is removed by the pressure during concrete placement regardless of the number and pitch of fixtures (puncture phenomenon). ) Can be reliably prevented.
(4) There is no possibility of a gap between the slit pier 3 and the formwork, and the position of the seismic slit can be visually confirmed from the outside using the bottom surface 3d of the slit pier 3 as a mark, so that the concrete construction is poor. It can prevent and can be filled reliably.

   Next, Example 2 will be described with reference to FIG.

  In Example 2, the surface of the slit pier is coated by winding a colored resin film around the slit pier in advance. Since the other configuration is the same as that of the first embodiment, the description thereof is omitted.

  In FIG. 6, 30 is a slit pier and 31 is a resin film. As a material of the resin film 31, for example, polyethylene or the like can be used. As the color of the resin film, it is desirable to use a color that is highly visible and is conspicuous even at night, such as red, blue, and fluorescent color.

In Example 2, in addition to the effects obtained in Example 1, the following effects are obtained.
(1) By winding the resin film 31 around the slit pier 30, the strength and durability are improved as compared with the case where wood is used alone.
(2) Since the resin film 31 makes it difficult for the concrete to adhere to the slit pier 30, it is easy to remove the slit pier after curing the concrete and can withstand repeated use.
(3) Since the resin film 31 is colored, the position of the slit pier 30 is easy to visually recognize, and the construction work can be easily performed even in a dark place.

  The embodiment of the present invention is not limited to the first and second embodiments, and the specific configuration of each component can be designed as appropriate.

  The present invention is not limited to a wall body, and can also be used for embedding earthquake-resistant slit materials in various parts.

DESCRIPTION OF SYMBOLS 1 1st formwork structure 2 2nd formwork structure 3, 30 Slit bar 3a Top surface 3b Inclined surface 3c Side surface 3d Bottom surface 4 Earthquake-resistant slit material 5, 6 Support member 7 Slit material main body 8A-8D Fixing tool ( nail)
10, 20 Formwork 11 Formwork plate 12 Formwork base 31 Resin film 51, 61 Inner groove 52, 62 Outer groove 71 Rock wool S Concrete placement space

Claims (1)

A method for constructing an earthquake-resistant slit material in a form-frame structure having first and second form-frame structures installed opposite to each other and an earthquake-resistant slit material arranged transversely between the form-frame structures. ,
The first and second formwork structures each have a plurality of formwork installed side by side and a slit bar fixed between the formwork at the mounting position of the earthquake-resistant slit material,
Each formwork is provided with a formwork plate and a plurality of formwork ties fixed to the outer surface thereof,
Each slit桟木are made from wood, its cross-sectional shape, a top surface and a bottom surface parallel to the top surface, and two sides perpendicular to the bottom surface, V-shape towards the top surface on each side It has a hexagonal shape that integrates a trapezoidal part and a rectangular part by providing two inclined surfaces
The earthquake-resistant slit material has a plate-like slit body and a pair of support members, each support member has an inner groove portion and an outer groove portion, and both end portions of the slit body are in the inner groove portion of each support member. Pre-inserted and integrated,
In the construction method, after installing the one formwork, the slit crosspiece is arranged so that the trapezoidal part faces the inside of the formwork, and one side surface of the slit crosspiece is placed on the formwork plate of the one formwork. A first step of fixing the slit pier to the one formwork by abutting the side of the wood and the side of the form pier and driving a nail parallel to the wall body;
The other side of the slit pier is brought into contact with the side of the form plate of the other formwork and the side of the form pier, and a nail is driven in parallel to the wall from the form pier toward the slit pier. Accordingly, a second step consisting of a first mold structure installation step of fixing the other mold to said slit桟木,
A step of installing an anti-seismic slit material, including a step of attaching and fixing an outer groove portion of one support member of the anti-seismic slit material to the trapezoidal portion of the slit piercing protruding from the first formwork structure;
The trapezoidal part of the new slit frame is fitted into the outer groove of the other support member of the fixed seismic slit material for positioning, and one side surface of the new slit frame is formed into the first formwork structure. The new slit pier is placed in contact with the side of the formwork plate and the side of the form pier of the form plate placed opposite to the body, and driven into the nail parallel to the wall body. The first step of fixing to the formwork, and the other side face of the new formwork plate is brought into contact with the side face of the formwork plate of the other formwork and the side face of the formwork formwork, and the slit from the formwork formwork side. by implanting wall parallel to the nail towards the桟木, to include a second step consisting of a second mold structure installation step of fixing the other mold to said new slit桟木Features
Construction method of earthquake-resistant slit material.

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