JP2020183628A - Construction method of unit truss - Google Patents

Abstract

To provide a construction method of a unit truss for reducing construction cost by improving assembly accuracy of the unit truss, saving construction labor, and securing construction safety.SOLUTION: In the construction method of a unit truss 1, a three-dimensional truss including a folded-plate roof 10 is divided into a plurality of unit trusses 1, the unit trusses 1 are manufactured in a factory and carried into a construction site, and the unit trusses 1 to which the folded-plate roof 10 is attached are connected and integrated, when the folded-plate roofs 10 are connected to each other, one end of the folded-plate roof 10 is bent up and elastically deformed, and the folded-plate roof is positioned at the other end of the 10b of the other folded-plate roof, and the folded-plate roof is fitted to the other folded-plate roof by releasing the elastic deformation.SELECTED DRAWING: Figure 1

Description

The present invention relates to a construction method of a unit truss, and in particular, a unit truss obtained by dividing a three-dimensional truss into a factory, transporting the unit truss to a construction site, and connecting the transported unit trusses to each other to form a three-dimensional truss. Regarding the law.

The unit truss method is to divide a three-dimensional truss used as a roof structural material into multiple unit trusses, manufacture each unit truss at a factory, transport it to a construction site, and connect the unit trusses to each other at the construction site. A construction method that integrates to form a three-dimensional truss.

Construction of roof trusses and roofing materials that cover large spans is often done at high places and is exposed to wind and rain. Especially on rainy or strong wind days, work safety cannot be ensured, so the site Work may be stopped. As measures against this aerial work, a total scaffolding method in which scaffolding is provided over the entire roof, and a lift-up method in which the roof truss is grounded near the ground and pushed up or lifted by heavy machinery such as jacks and cranes. Etc. have been devised. At the time of grounding, it is also attempted to attach a roofing material to the roof truss and lift it up.

In addition, the construction of roof trusses and roofing materials that cover a large span is an outdoor work, so there is a risk of heat stroke in the summer, and the work is done in the severe cold in the winter. There is a problem. In particular, in recent years, the aging of field workers has progressed, and young workers tend to avoid field work, making it difficult to secure field workers.

Further, the construction of roof trusses and roofing materials covering a large span depends on the weather because it is an outdoor work, and there is a problem that a work process is required as compared with a factory work. Further, in the field work, it takes more time to assemble the roof truss than in the factory work, and there is a problem that the construction man-hours of the field workers increase.

Construction methods for unit trusses are being studied to solve these problems. FIG. 8 is a perspective view showing a schematic configuration of one embodiment of the unit truss according to the present invention.

FIG. 8A is a unit truss 1A which is one of the examples of the unit truss 1. This is a type in which a parapet is provided on the upper part on the gable side, so that the parapet support member 31 is attached to the unit truss 1. FIG. 8B is a unit truss 1B which is one of the examples of the unit truss 1. This is a case where the parapet support member 31 is attached to the truss structure because there is a parapet to which the roof finishing material is attached to the upper part on the flat side. FIG. 8C is a unit truss 1C which is one of the examples of the unit truss 1. This is the case where there is only the parapet support member 31 at the bottom because there is no parapet. These unit trusses 1A, 1B, 1C are combined and connected to form a three-dimensional truss. 8 (a) to 8 (c) show the main members such as the upper chord member 27, the lower chord member 32, the diagonal member 17, and the connecting member 18 constituting the unit truss 1. However, the structure of the unit truss 1 is not limited to these, and various variations are possible depending on design conditions, construction conditions, and the like.

Patent Document 1 discloses a method for installing a wooden truss beam unit. Here, the truss beam alone is composed of a truss chord material composed of an upper chord material and a lower chord material, a truss belly material composed of a bundle material and a diagonal material, and a reinforcing plywood attached to both sides of the beam in the beam width direction. It is described that a plurality of juxtaposed truss beams are connected to each other via an upright joint plate material to form a unit.

Patent Document 2 discloses a support structure for a heat insulating material of a folded plate roof, which allows a heat insulating material to be attached to the inside of the folded plate roof without using an adhesive. Here, heat insulation is provided inside a folded-plate roof having a plurality of mountain portions in the width direction and having a ridge portion fixed to a tight frame erected in a purlin along the longitudinal direction at the top of each mountain portion. A heat insulating material support structure for a folded plate roof to which a material is attached and supported by a holding pin is described.

Patent Document 3 discloses a roof truss that can reduce transportation costs and construction costs by dividing the span into a plurality of parts in the longitudinal direction and configuring the span so that it can be assembled at the site. Here, a gusset plate provided on the upper chord material or the lower chord material of a plurality of divided trusses and joining the adjacent upper chord material or the lower chord material and a connecting member for joining the lower chord material or the upper chord material of the plurality of divided trusses are provided. Is described.

JP 2015-209725 Japanese Unexamined Patent Publication No. 2008-2129 Japanese Unexamined Patent Publication No. 2003-3005

As mentioned above, the construction method of bringing factory-manufactured units to the construction site, such as unit trusses, and connecting and integrating the units at the construction site, many parts are manufactured at the factory. it can. Therefore, the above-mentioned work at a high place and work exposed to wind and rain can be avoided, there are few problems in the work environment of field workers, and the work is done indoors regardless of the weather. However, various problems arise in terms of connecting and integrating factory-manufactured units at a construction site.

The first issue is the problem of construction accuracy. In the case of a normal three-dimensional truss construction, construction errors are unlikely to accumulate because it is assembled in units of members. On the other hand, when each unit is manufactured in a factory like a unit truss, initial irregularities and manufacturing errors of the members constituting each unit are accumulated, and when connecting with other units at a construction site, the accumulated unit truss is accumulated. There is a problem that a method for absorbing mutual errors must be prepared in advance.

The second problem is the construction work. In the case of a normal three-dimensional truss construction, it is said that the construction work is almost proportional to the number of members to be assembled, the number of joints, and the like. On the other hand, at the construction site of a unit truss, most of the construction work is the work of connecting the units, so if it takes time to connect, the construction work will increase accordingly. As a result, there is a problem that the construction period set in advance is delayed.

The third issue is the problem of construction safety. In the case of a normal three-dimensional truss construction, especially in the case of construction using a total scaffolding, the possibility of a worker falling or falling is low. On the other hand, at the construction site of the unit truss, each unit truss is lifted by a heavy machine such as a crane, and a worker may connect the units in the vicinity thereof. Therefore, there is a problem that the worker may be injured due to the dropped unit or the like. Further, the unit truss is in an unstable state until it is completed, and there is a problem that a worker may be injured due to a fall of the unit truss during construction.

Further, these problems are reflected in the construction cost, and there is a problem that the profitability of the construction is affected. For example, if the construction accuracy is poor, it takes time and effort to construct, and the usage time of heavy machinery such as a crane increases, and accordingly, the man-made work of field workers increases and the construction cost increases. In addition, if the construction work is troublesome, the construction safety is lowered and the cost for safety measures at the construction site is increased. As described above, the above-mentioned three problems are related to each other and affect the construction cost at the construction site.

The first purpose of the present application is to solve such a problem, improve the assembly accuracy of the unit truss when constructing the unit truss, save the labor for construction, secure the construction safety, and easily connect the unit truss. It is to provide a construction method of a unit truss that reduces the cost.

A second object of the present application is to solve such a problem and to provide a construction method of a unit truss that reduces the construction cost by simply connecting the folded plate roof at the time of construction of the unit truss.

In order to achieve the above object, the unit truss construction method according to the present invention divides a three-dimensional truss including a folded plate roof into a plurality of unit trusses, carries the unit truss to a construction site, and attaches a folded plate roof. It is a construction method of a unit truss that connects and integrates a truss with a unit truss with another folded roof, and when connecting the folded roof to another folded roof, the end of the folded roof is used. It is characterized in that it is bent up and elastically deformed, aligned with another folded plate roof, and the elastic deformation is released and fitted.

With the above configuration, a unit truss obtained by dividing a three-dimensional truss can be manufactured at a factory and carried to a construction site, and the unit truss can be connected to another unit truss and integrated at the construction site. By this unit truss construction method, it is possible to improve the assembly accuracy of the unit truss, save labor for construction, and ensure construction safety. As a result, the construction cost of the unit truss can be reduced. Similarly, with respect to the folded plate roof, the folded plate roof can be easily connected to another folded plate roof at the construction site and integrated. As a result, the construction cost of the unit truss including the folded plate roof can be reduced.

In addition, the construction method of the unit truss is equipped with a connecting folded plate used for connecting the folded plate roof and another folded plate roof, and at the site, one end of the connecting folded plate is tilted to align with the other folded plate roof. It is preferable to cover the other folded plate roof, bend up the end of the folded plate roof to elastically deform it, align it with the other end of the connected folded plate, release the elastic deformation, and fit it with the connected folded plate. .. As a result, as with the connection between the unit truss and the other unit truss, the connection between the folded plate roof and the other folded plate roof can be easily connected by using the connecting folded plate. As a result, the construction cost of the unit truss including the folded plate roof can be reduced.

Further, in the construction method of the unit truss, it is preferable that the heat insulating material is not fitted to one end of the connecting folded plate to be covered with the folded plate roof at the time of factory production. As described above, by not attaching the heat insulating material to one end of the connecting folded plate, one end of the folded plate roof can be easily bent up, elastically deformed and fitted, and the construction efficiency of the folded plate roof can be improved.

Further, in the construction method of the unit truss, it is preferable that the folded plate roof is bent up by a special jig and elastically deformed. As a result, when the folded plate roof is long, the work labor of field workers can be reduced and the work time can be shortened. And the construction efficiency of the roof can be further improved.

Further, the construction method of the unit truss includes a unit connecting portion for connecting the unit truss and another unit truss, and the unit connecting portion is fastened to either the unit truss or the other unit truss with a screw. It is preferable to bring it to the construction site. As a result, when connecting the unit truss and another unit truss, the construction accuracy can be improved and the construction time can be shortened.

Further, in the construction method of the unit truss, when connecting the unit truss to another unit truss at the site, it is preferable to sandwich a plurality of dimensional adjustment members having a predetermined thickness in the unit connecting portion. As a result, when the unit truss is connected to another unit truss, the clearance between the unit trusses can be secured by the dimensional adjustment member, and the above-mentioned problems of construction accuracy and construction labor can be solved.

In addition, the construction method of the unit truss is that when the unit truss whose center of gravity is difficult to obtain is lifted by a heavy machine, a cross member is provided at an arbitrary position at the upper chord material level so that the lifting position can be adjusted. preferable. In this way, when a small wall, a parapet, or the like is attached to the unit truss, it may be difficult to balance the unit truss when it is lifted by a heavy machine such as a crane, and construction time may be wasted. Therefore, if the cross member is provided at an arbitrary position at the upper chord material level, the mounting position such as lifting can be adjusted within an arbitrary range, and quick and safe construction can be expected. As a result, the above-mentioned problems of construction labor and construction safety can be solved.

Furthermore, the construction method of the unit truss is as follows: the step of building the right side truss and the left side truss of the unit truss, and the front truss and the back truss connecting both ends of the right side truss and the left side truss, respectively. The step of forming the truss, the step of manufacturing the main building unit consisting of the main building, the stiffener and the diagonal material, arranging it inside the outer peripheral truss and adjusting the linear dimensions of the opposing outer peripheral trusses, and the inner side of the outer peripheral truss. It is preferable to include a step of installing a horizontal brace in the unit to adjust the diagonal dimension of the unit truss and a step of connecting and integrating the unit truss with another unit truss. As a result, in the construction of the unit truss at the construction site, it is possible to shorten the construction time while improving the construction accuracy.

As described above, according to the unit truss construction method according to the present invention, the construction of the unit truss reduces the construction cost by improving the assembly accuracy of the unit truss, saving the construction labor, and ensuring the construction safety. The law can be provided.

Further, according to the unit truss construction method according to the present invention, it is possible to provide a unit truss construction method that reduces the construction cost by simply connecting and integrating the folded plate roofs.

It is a perspective view which shows the schematic structure of one Embodiment of the unit truss connecting means and the folding plate roof connecting means which concerns on this invention in comparison with the conventional construction method. It is a detailed plan view and a partial detailed view which shows the unit connection part of the unit truss and another unit truss at the lower chord node of a unit truss. It is a detailed perspective view which shows the connection method of a unit truss and another unit truss. It is explanatory drawing which shows one Example which connects a folded plate roof and another folded plate roof by using a special jig. It is a perspective view which shows the embodiment of the construction method which provides the cross member so that it may be lifted at an arbitrary position of the upper chord member level at the time of lifting a wife small wall unit, and the position of the center of gravity is obtained. It is a perspective view which shows one Example concerning the assembly procedure of a unit truss. It is a flow chart which shows the assembly procedure of the unit truss of FIG. It is a perspective view which shows the schematic structure of one Example of a unit truss.

(Construction method for unit truss and folded plate roof)
The construction method of the unit truss 1 according to the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a schematic configuration of one embodiment of a means for connecting the folded plate roof 10 of the unit truss 1 according to the present invention in front view in comparison with the conventional method. FIG. 1A shows a means for connecting the folded plate roof 10 of the conventional unit truss 1. Further, FIG. 1B shows a means for connecting the folded plate roof 10 of the unit truss 1 according to the present invention. Further, FIG. 1 (c) shows the details of the fitting portion 38 of FIG. 1 (b) in a side view excluding the heat insulating material 8. Further, FIG. 1D shows a cross-sectional view of an embodiment of the cross-sectional shape of the folded plate roof 10. Further, FIG. 1 (e) is a perspective view showing one embodiment of the overall configuration of the folded plate roof 10.

In the conventional construction method for the unit truss 1 shown in FIG. 1A, members are brought into the construction site, and the upper chord member 27, the lower chord member 32, and the diagonal member 17 are placed on the scaffolding provided at the construction site (FIG. 1A). It is common to assemble the unit truss components such as (see 8) while they are being carried in. The construction method for the unit truss 1 according to the present invention shown in FIG. 1B is a construction method in which one unit truss 2 is connected to another unit truss 3 at the site by a unit connecting portion 6 described later. In this way, the unit truss 1 is manufactured at the factory, carried to the construction site, and connected to another unit truss 3 at the construction site to be integrated. By devising the connection work of the unit truss 1 at the construction site as described later, it is possible to improve the assembly accuracy of the unit truss 1, save the construction labor, and ensure the construction safety. In accordance with the construction method of the unit truss 1, the construction method of the folded plate roof 10 is also required to improve the assembly accuracy, save the construction labor, and ensure the construction safety. FIG. 1 (c) shows the details of the fitting portion 38 of FIG. 1 (b) in a front view. FIG. 1 (c) clearly illustrates the operation of bending up the folded plate roof 10 and fitting it to the connected folded plate 4 with respect to the folded plate roof 10 and the connecting folded plate 4 excluding the heat insulating material 8.

In the conventional construction method of the folded plate roof 10, the main building unit 14 arranged on the unit truss 1 or the folded plate 30 having the heat insulating material 8 attached to the back surface on the main building 15 is overlapped and fitted as it is, so-called. It is generally connected by "rigid fitting". This is because the folded plate roof 10 to which the heat insulating material 8 is attached to the back surface has high bending rigidity, and it is difficult to bend the end portion. In the construction method of the folded plate roof 10 according to the present invention, the folded plate roof 10 is connected to another folded plate roof 11 by using the connecting folded plate 4. Then, one end of the connecting folded plate 4 is tilted to the other folded plate roof 11 to align the position and cover the other folded plate roof 11, and the end portion of the folded plate roof 10 is bent up and elastically deformed to elastically deform the connected folded plate 4 It is a construction method in which the position is aligned with the other end of the roof, the elastic deformation is released, and the roof is fitted with the connecting folded plate 4. The heat insulating material 8 is not attached to the back surface of the portion of the folded plate roof 10 connected to the connecting folded plate 4. However, by superimposing the folded plate roof 10 on the connecting folded plate 4, the heat insulating material 8 on the back surface of the connecting folded plate 4 can be used as the heat insulating material 8 on the back surface of the folded plate roof 10. As described above, since the folded plate 30 at the portion where the folded plate roof 10 overlaps the connecting folded plate 4 does not have the heat insulating material 8, the bending rigidity of the folded plate roof 10 is low, and it is easy to bend up. By this so-called "bending-up fitting", the folded plate roof 10 can be easily connected to another folded plate roof 11 via the connecting folded plate 4 at the construction site in the same manner as the unit truss 1. The construction cost of the unit truss 1 including the folded plate roof 10 can be reduced.

1 (d) and 1 (e) show an embodiment of a folded plate roof. The folded plate roof 10 is composed of a corrugated folded plate 30 and a heat insulating material 8. The dimension of "P" in FIG. 1 (d) is, for example, 530 mm or 580 mm. The embodiment of the present invention is based on the folded plate roof 10 having this shape, but other folded plate roofs 10 may be used.

FIG. 2 is a detailed plan view showing a unit connecting portion 6 connecting one unit truss 2 and another unit truss 3 at the lower chord node 33, and a partial detailed view thereof. FIG. 2A is a detailed plan view of the joining detail at the lower chord node 33, and FIG. 2B is an enlarged partial detailed view of the unit-to-unit connecting hardware 23 of FIG. 2A. One of the features of the unit truss 1 is that the joint portion is simplified by omitting the bundle material (not shown) as compared with the conventional unit truss 1. Further, the mounting position of the horizontal brace 20 is changed to the lower chord surface instead of the upper chord surface with respect to the conventional unit truss 1. As a result, it became possible to simplify the joining detail at the lower chord node 33.

As shown in FIG. 2A, the lower chord member 32, the horizontal brace 20, and the stiffener 16 are assembled on the gusset plate 24 at the lower chord node 33. In the conventional unit truss 1, the lower chord node 33 has complicated details because the bundled material (not shown) is further gathered at the lower chord node 33.

As shown in FIG. 2B, a unit connecting portion 6 for connecting the unit truss 2 and another unit truss 3 is provided. Then, the unit connecting portion 6 is provided with the inter-unit connecting hardware 23. The inter-unit connecting hardware 23 is fastened to either the unit truss 2 or the other unit truss 3 with screw holes 9 and carried to the construction site. As a result, when the unit truss 1s are connected to each other, the construction accuracy can be improved and the construction work can be shortened. Further, the unit connecting portion 6 is provided with a dimension adjusting member 7 described later in order to secure a gap (d) between the units when connecting the unit truss 1s to each other.

(Connected hardware between units)
FIG. 3 shows an embodiment of the unit-to-unit connecting hardware 23 of the unit truss 1, one unit truss 2 and another unit truss 3 connected by the inter-unit connecting hardware 23 in a detailed perspective view. The connecting means between the units of the unit truss 1 has different details at the middle portion and the end portion of the unit truss 1. FIG. 3A is a perspective view showing the connection between the units at the lower chord node 33 by the unit-to-unit connection hardware 23 in the intermediate portion as in FIG. 2. A gusset plate 24 is provided at the lower chord node 33, and a unit-to-unit connecting hardware 23 is attached. Further, the constituent members of the unit truss 1 such as the stiffener 16, the connecting member 18, the diagonal member 17, and the horizontal brace 20 are gathered at the lower chord node 33. FIG. 3B is a perspective view showing the connection between the units by the unit-to-unit connection hardware 23 at the end node 36.

In FIG. 3A, in the middle portion of the unit truss 1, the inter-unit connecting hardware 23 is attached to the gusset plate 24 to which the members such as the horizontal brace 20 gathering at the lower chord node 33 are attached, and one unit truss 2 is the other. It is connected to the unit truss 3 of. In FIG. 3B, at the end node 36 of the unit truss 1, the gusset plates 24 to which the members such as the lower chord member 32 and the horizontal brace 20 to be assembled are attached are connected to each other by the connecting hardware 34, and the end of the unit truss 1 is shown. It is connected to the small wall lower frame 35 of.

(Mating with a special jig)
FIG. 4 shows a construction method in which the folding plate roof 10 and the other folded plate roof 11 (see FIG. 1) are connected by the special jig 5. FIG. 4A is a plan view seen from above, and FIG. 4B is a sectional view taken along line GG of FIG. 4A. As described above, the end portion of the folded plate roof 10 is bent up by the special jig 5 and elastically deformed. Since this work is fitted by bending up the portion where the heat insulating material 8 is not attached to the folded plate 30, the worker can manually perform this work. However, when the folded plate roof 10 and the other folded plate roof 11 are long roofs, there is a limit to labor and time to perform this work only by hand. Therefore, various construction methods using the special jig 5 can be considered, and an example of one of them is shown in FIG.

The dedicated jig 5 shown in FIG. 4 is composed of two stepladders 5a, a connecting rod 5b, a tension member 5c, a handle 5d, a grip portion 5e, a leg portion 5f, and a crank portion 5g. Two stepladders 5a are arranged on the folded plate roof 10, and the stepladders 5a are connected by a crank-shaped connecting rod 5b, and handles 5d are provided at both ends or one end. Then, the tension member 5c is attached to the crank portion 5g of the connecting rod 5b. A grip portion 5e is provided at the other end of the tension member 5c to grip a portion of the long folded plate roof 10 to be bent up. Then, the handle 5d is rotated. Then, the crank portion 5g converts the rotational movement of the handle 5d into an operation of pulling the grip portion 5e. As a result, the folded plate 30 is bent only by the field worker installing the special jig 5 on the folded plate roof 10 and rotating the handle 5d, and the fitting is completed without taking time and effort for the connecting work. The leg portion 5f where the stepladder 5a comes into contact with the folded plate roof 10 is cured with a soft material such as cloth. Further, the grip portion 5e that grips the folded plate roof 10 is also cured with a soft material such as cloth. This method is only one embodiment, and another method, for example, the end of the long folded plate roof 10 is bent up by using gravity while the folded plate roof 10 is lifted by a heavy machine such as a crane. It may be fitted together. The tension member 5c may be, for example, a wire rod or a wire that applies tension.

(Installation of horizontal members)
FIG. 5 is a perspective view showing an embodiment of a method of attaching the cross member 21 so that the cross member 21 can be lifted at an arbitrary position at the upper chord member 27 level when the wife small wall unit 25 is lifted. FIG. 5A shows a case where the conventional end wall unit 25 is lifted by a heavy machine 29 such as a crane. FIG. 5B shows a case where the cross member 21 is attached to the end small wall unit 25 and lifted by a heavy machine 29 such as a crane. In this way, when the wife small wall 25, parapet, etc. are attached to the unit truss 1 and it is difficult to balance when lifting with a heavy machine 29 such as a crane, the cross member 21 is provided to lift the unit truss within a certain range. The rope mounting position of heavy machinery can be adjusted. As a result, the above-mentioned problems of construction labor and construction safety can be solved.

(Member for dimension adjustment)
When connecting the unit truss 1 at the site, the construction accuracy can be ensured by using a plurality of dimensional adjustment members 7 having a predetermined thickness in the unit connecting portion 6. For example, a dimensional adjustment member 7 such as a piece of wood or a steel plate is sandwiched in the gap (d) between the units shown in FIG. 2B to absorb construction errors and secure a clearance. In the case of steel plates, steel plates with thicknesses of 7 mm, 9 mm, 12 mm, etc. are prepared, and they are used properly to secure clearance and to be buried. As a result, in the unit connecting portion 6, the clearance between the unit truss 1 for adjusting the dimensions can be secured, and the problem of the construction accuracy and the problem of the construction work can be solved.

(Unit truss construction procedure)
FIG. 6 shows a perspective view of the assembly procedure of the unit truss 1. First, as shown in FIG. 6A, two surfaces of the unit truss 1, the right side truss 25a and the left side truss 25b, are erected at the construction site. The "left and right" of the right side truss 25a and the left side truss 25b refer to the right side truss 25a and the left side truss 25b when the unit truss 1 is viewed from the "front" direction indicated by the arrow in FIG. 6 (a). The side opposite to this "front" is called the "back". Next, as shown in FIG. 6B, the front truss 26a and the back truss 26b of the unit truss 1 are erected at the construction site. Then, the right side truss 25a and the left side truss 25b are connected to each other to form the outer peripheral truss 28 of the unit truss 1. Here, the inside of the unit truss 1 surrounded by the outer peripheral truss 28 including the right side truss 25a, the left side truss 25b, the front truss 26a, and the back truss 26b is hereinafter referred to as "truss inner surface 37". Next, as shown in FIG. 6C, a purlin unit 14 composed of a purlin 15, a stiffener 16, and a diagonal member 17 is manufactured. The purlin unit 14 composed of the purlin 15, the stiffener 16, and the diagonal member 17 may be manufactured at a factory or at a construction site. Next, as shown in FIG. 6D, the purlin unit 14 is attached to the inner surface 37 of the truss. As a result, the linear distance between the right side truss 25a and the left side truss 25b is adjusted, and the construction accuracy can be ensured. Next, as shown in FIG. 6E, all purlin units 14 are attached to the truss inner surface 37. Then, as shown in FIG. 6 (f), the horizontal brace 20 is attached to adjust the diagonal distance, and the construction accuracy of the diagonal distance of the outer peripheral truss 28 can be ensured. According to this unit truss 1 assembly procedure, the assembly of the unit truss 1 can be completed in a short time while adjusting the accuracy by the "main building unit 14" and the "horizontal brace 20".

FIG. 7 shows a flow chart showing the procedure for assembling the unit truss of FIG. When the unit truss 1 is grounded at a construction site, the outer truss 28 that constitutes the unit truss 1 that does not stand on its own is constructed by using the purlin unit 14 and the horizontal brace 20 that are the constituent materials of the unit truss 1. Shows how to assemble quickly while ensuring accuracy. An S is added to each step.

First, the right side truss 25a and the left side truss 25b of the unit truss 1 are erected (S1). Next, the front truss 26a and the back truss 26b of the unit truss 1 are erected and connected to both ends of the right side truss 25a and the left side truss 25b to form the outer peripheral truss 28 (S2). At this stage, the accuracy of the distance between the right side truss 25a and the left side truss 25b has not yet been obtained.

A purlin unit 14 composed of a purlin 15, a stiffener 16 and a slant 17 is manufactured (S3). The purlin unit 14 is installed inside the outer peripheral truss 28 to adjust the distance between the outer peripheral truss 28 (S4). Further, a horizontal brace 20 is installed on the unit truss 1 to adjust the diagonal dimension (S5). One completed unit truss 2 is lifted by a heavy machine 29 such as a crane and installed at a predetermined position (S6). Then, it is connected and integrated with another unit truss 3 already attached (S7). Here, the presence / absence of the next unit truss 1 is determined (S8), and if "Yes", the process returns to S1, and if "No", the process ends. By assembling the unit truss 1 by these procedures, it is possible to improve the construction accuracy of the unit truss 1 at the construction site and shorten the construction work.

The configuration, shape, size, and arrangement relationship described in the above embodiments are merely outlined to the extent that the construction method of the unit truss 1 of the present invention can be understood and implemented. Therefore, the present invention is not limited to the described embodiments, and can be changed to various forms as long as it does not deviate from the scope of the technical idea shown in the claims.

Examples of 1,1A, 1B, 1C unit trusses, 2 (one) unit truss, 3 other unit trusses, 4 connecting folded plates, 5 special jigs, 5a step stands, 5b connecting rods, 5c pulling materials, 5d handles, 5e grip, 5f leg, 5g crank, 6 unit connection, 7 dimension adjustment member, 8 insulation, 9 screw holes, 10 (one) folded plate roof, 11 other folded plate roof, 14 main building unit , 15 main building, 16 stiffener, 17 diagonal material, 18 connecting material, 20 horizontal brace, 21 horizontal material, 23 unit-to-unit connecting hardware, 24 gusset plate, 25 wife small wall unit, 25a right side truss, 25b left side truss , 26a front truss, 26b back truss, 27 upper chord material, 28 outer circumference truss, 29 heavy machine, 30 folded plate, 31 parapet support material, 32 lower chord material, 33 lower chord node, 34 connecting hardware, 35 small wall lower frame, 36 end Nodal points, 37 truss inner surfaces, 38 matings, gaps between d units.

In order to achieve the above object, the unit truss construction method according to the present invention divides a three-dimensional truss including a long folded plate roof having a heat insulating material on the back surface into a plurality of unit trusses to construct the unit truss. carried to the scene, the unit connecting portion, and one unit truss where one folded plate roof Toritsui, construction methods of the unit truss for integrally connecting the other units truss Toritsui other folded plate roof, the Therefore, a connecting folded plate is used to connect one folded plate roof to another folded plate roof, and a heat insulating material is not fitted to the end of the back surface of one folded plate roof, and the connected connection is made. The overlapping part of the back surface of the folded plate is used as a heat insulating material, and when connecting, one end of the connecting folded plate is tilted to align and cover the other folded plate roof, and the heat insulating material of one folded plate roof is fitted. It is elastically deformed by raising turning the ends not to align it with the other end of the communication Yuioriban, wherein the fitting to release the elastic deformation.

Further, in the construction method of the unit truss, it is preferable that the heat insulating material is not fitted to the end portion of the back surface of one connecting roof covered with the connecting folded plate at the time of factory production . As a result, as with the connection between the unit truss and the other unit truss, the connection between the folded plate roof and the other folded plate roof can be easily connected by using the connecting folded plate. As a result, the construction cost of the unit truss including the folded plate roof can be reduced.

Further, as for the construction method of the unit truss, it is preferable that one folded plate roof is elastically deformed by bending up the end portion of one folded plate roof with a special jig. As a result, when the folded plate roof is long, the work labor of field workers can be reduced and the work time can be shortened. And the construction efficiency of the roof can be further improved.

Also, construction methods of the unit truss units connecting portion, the unit truss, or other unit truss is fastened by screws to one of to be carried into the construction site preferred. As a result, when connecting the unit truss and another unit truss, the construction accuracy can be improved and the construction time can be shortened.

Claims (8)

The three-dimensional truss including the folded plate roof is divided into a plurality of unit trusses, the unit truss is carried to the construction site, and the unit truss with the folded plate roof is connected to the unit truss with another folded plate roof. It is a construction method of the unit truss that is integrated by
When connecting the folded plate roof to the other folded plate roof, the end portion of the folded plate roof is bent up and elastically deformed, aligned with the other folded plate roof, and the elastic deformation is released. A method of constructing a unit truss, which is characterized by fitting. The unit truss construction method according to claim 1, further comprising a connecting folded plate used for connecting the folded plate roof and the other folded plate roof, and connecting the folded plate roof to the other folded plate roof at the site. One end of the folded plate is tilted and aligned to cover the other folded plate roof, the end of the folded plate roof is bent up and elastically deformed, and the position is aligned with the other end of the connected folded plate to perform the elastic deformation. A method of constructing a unit truss, which comprises releasing the roof and fitting it with the connecting folded plate. The unit truss construction method according to claim 2, wherein a heat insulating material is not fitted to the one end of the connecting folded plate to be covered with the folded plate roof at the time of factory production. Construction method. The unit truss construction method according to claim 2 or 3, wherein the connecting folded plate is bent up by a special jig and elastically deformed. The unit truss construction method according to any one of claims 1 to 4, wherein the unit truss is provided with a unit connecting portion for connecting the unit truss and another unit truss, and the unit connecting portion is the unit truss. , Or a unit truss construction method characterized in that it is fastened to one of the other unit trusses with a screw and carried to a construction site. The unit truss construction method according to claim 5, wherein when the unit truss is connected to the other unit truss at the site, a plurality of dimensional adjustments having a predetermined thickness at the unit connecting portion are used. A unit truss construction method characterized by sandwiching members. The unit truss construction method according to any one of claims 1 to 3, wherein the lifting position can be adjusted when the unit truss whose center of gravity is difficult to obtain is lifted by a heavy machine. A method of constructing a unit truss, which comprises providing a cross member at an arbitrary position at the upper chord material level. A unit truss construction method using the unit truss construction method according to any one of claims 1 to 7.
Steps to build the right side truss and left side truss of the unit truss,
A step of building a front truss and a back truss connecting both ends of the right side truss and the left side truss to form an outer truss, respectively.
A step of manufacturing a purlin unit composed of a purlin, a stiffener, and a diagonal member, arranging it inside the outer truss, and adjusting the linear dimensions of the opposing outer trusses.
A step of installing a horizontal brace inside the outer peripheral truss to adjust the diagonal dimension of the unit truss, and
A step of connecting and integrating the unit truss with another unit truss,
A method of constructing a unit truss, which is characterized by being equipped with.

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