JP2020084530A - Roof frame construction method - Google Patents

Abstract

To provide a roof frame construction method which enables accurate construction of roof frames.SOLUTION: A roof frame construction method is for constructing roof frames of buildings, comprising: a forming stage to form a beam structure set S, which is an assembly of a plurality of beam structures 30 that constitute the roof frame and has rigidity equal or more than a designated value; and a traveling stage to support the aforesaid beam structure set S only at the tips of the beam structures and move, after the forming stage, the beam structure set S to a designated position to install there.SELECTED DRAWING: Figure 4

Description

The present invention relates to a method for constructing a roof frame.

Conventionally, as one of techniques for constructing a roof frame structure for a building such as a gymnasium, a technique for installing a plurality of truss units constituting the roof frame by individually traveling (horizontally pulling) to an installation position has been proposed. (See Patent Document 1).

JP, 2003-221875, A

However, in the above-described conventional technique, as described above, since a plurality of truss units are individually installed by horizontally traveling to the installation position, the horizontal rigidity of each truss unit is relatively low. In that case, the twisting of the truss unit may occur during the traveling of the truss unit, which may cause an excessive horizontal displacement of the truss unit. Therefore, there is room for improvement from the viewpoint of accurately constructing the roof frame. ..

The present invention has been made in view of the above, and an object of the present invention is to provide a method for constructing a roof frame structure that enables the roof frame structure to be accurately constructed.

In order to solve the above-mentioned problems and to achieve the object, a method of constructing a roof frame according to claim 1 is a method for constructing a roof frame of a building, and a beam member constituting the roof frame. And a forming step of forming a set having a rigidity of a predetermined amount or more, and after the forming step, the set is traveled to a predetermined position while supporting only the end portion of the set. And a traveling step of installing.

The method for constructing a roof frame according to claim 2, wherein in the method for constructing a roof frame according to claim 1, the beam is a truss beam having a pair of upper chord members and a pair of lower chord members. A brace material horizontally provided between the upper chord members or between the pair of lower chord members, the brace member connecting the pair of upper chord members or the pair of lower chord members.

The method for constructing a roof frame according to claim 3, wherein in the method for constructing a roof frame according to claim 1 or 2, when the traveling step is performed on each of the plurality of sets, the traveling after the second traveling is performed. The number of the beam members of the set corresponding to the process is made equal to or smaller than the number of the beam members of the set corresponding to the first traveling process.

According to the method for constructing a roof frame according to claim 1, a forming step of forming a set which is a combination of a plurality of beam members constituting the roof frame and has a rigidity of a predetermined amount or more, and after the forming step. , A traveling step of moving the set to a predetermined position while supporting only the end portion of the set, and therefore, as compared with the case where the single beam member is installed by traveling, Specifically, horizontal displacement of each beam member of the set that occurs during traveling or installation of the set can be suppressed, and the roof frame structure can be accurately constructed.

According to the method for constructing a roof frame according to claim 2, the beam member is a brace member horizontally provided between a pair of upper chord members or between a pair of lower chord members, and a pair of upper chord members is provided. Since the brace member is provided to connect the two or a pair of lower chord members to each other, horizontal displacement of the beam member can be suppressed as compared with the case where the brace member is not provided, and the beam member can be accurately installed.

According to the method of constructing a roof frame according to claim 3, when the traveling process is performed on each of a plurality of sets, the number of beam members of the set corresponding to the second and subsequent traveling processes is set to the first traveling. Since the number of beam members in the set corresponding to the process is equal to or less than that, in the second and subsequent traveling processes, the traveling process can be performed quickly while suppressing horizontal displacement of each beam member in the set that occurs during the traveling process. Therefore, the roof frame can be constructed accurately and quickly.

It is a figure which shows notionally the building which concerns on embodiment of this invention, (a) is a front view, (b) is a side view. It is a perspective view showing a beam material. It is a perspective view which shows the formation process of the construction method of a roof frame (partial illustration is abbreviate|omitted). It is a side view which shows the traveling process of the construction method of a roof frame, and is a figure which shows the traveling process of the 1st time. It is a side view showing a traveling process of a construction method of a roof frame, and is a figure showing a second traveling process. It is a side view which shows the traveling process of the construction method of a roof frame, and is a figure which shows the traveling process of the last time.

Embodiments of a method for constructing a roof frame according to the present invention will be described in detail below with reference to the accompanying drawings. First, the basic concept of the [I] embodiment will be described, then the specific contents of the [II] embodiment will be described, and finally, a modified example of the [III] embodiment will be described. However, the present invention is not limited to the embodiments.

[I] Basic Concept of Embodiment First, the basic concept of the embodiment will be described. The embodiments generally relate to a construction method for constructing a roof frame of a building. Here, the concrete structure and type of the “building” are arbitrary, and are concepts including, for example, public facilities (eg, gymnasiums), commercial facilities (eg, shopping malls), factory facilities, etc. In the form of, it will be described as a gymnasium.

[II] Specific Content of Embodiment Next, specific content of the embodiment will be described.

(Constitution)
First, the structure of a building to which the method for constructing a roof frame according to the embodiment is applied will be described. FIG. 1 is a diagram conceptually showing a building according to an embodiment of the present invention, in which (a) is a front view and (b) is a side view. In the following description, the X direction in FIG. 1 is the left-right direction of the building (-X direction is the left direction of the building, +X direction is the right direction of the building), and the Y direction of FIG. 1 is the front-back direction of the building (+Y direction is the building direction). The front direction and the −Y direction are referred to as the rear direction of the building, and the Z direction in FIG. 1 is referred to as the vertical direction of the building (+Z direction is the upward direction of the building and −Z direction is the downward direction of the building). As shown in FIG. 1, the building 1 is provided on the installation surface C, and includes a roof portion 10, a support portion 50, a seismic isolation device (not shown), and a utilization space portion (not shown).

(Structure-Roof)
The roof part 10 is a part of the basic structure of the building 1 and is a part for covering the upper part of the utilization space part, and includes a roof frame 20 and a roof panel 40 as shown in FIG. 1.

(Structure-Roof part-Roof structure)
The roof frame 20 is a basic structure of the roof part 10. The roof frame 20 is configured by combining a plurality of long beam members 30 made of steel, for example. Specifically, as shown in FIG. 1, each of the plurality of beam members 30 is arranged so that the longitudinal direction of the beam member 30 is substantially along the left-right direction, and the plurality of beam members 30 is substantially along the front-rear direction. It is configured by arranging in parallel.

Here, the specific configuration of the plurality of beam members 30 is arbitrary, but in the embodiment, each beam member is configured by a truss beam. FIG. 2 is a perspective view showing the beam member 30. Specifically, as shown in FIG. 2, the horizontal length of each of the plurality of beam members 30 is set to be slightly longer than the horizontal length of the utilization space portion. The length in the front-rear direction of each of the plurality of beam members 30 is set to be shorter than the length in the front-rear direction of the use space portion. It is set shorter than the length. Further, each of the plurality of beam members 30 includes a front truss portion 31, a rear truss portion 32, an upper truss portion 33, a lower truss portion 34, a left truss portion 35, and a right truss portion 36, respectively.

Of these, the front truss portion 31 is a portion located on the front side of the beam member 30, and is configured by combining a plurality of chord members. Specifically, as shown in FIG. 2, the front upper chord member 31a, the front lower chord member 31b located below the front upper chord member 31a, and the space between the front upper chord member 31a and the front lower chord member 31b are spaced from each other. A plurality of front-side bundles 31c are arranged side by side in the left-right direction, and a front diagonal member 31d is provided between the front-side bundles 31c. Further, the rear truss portion 32 is a portion located on the rear side of the beam member 30, and is configured substantially the same as the configuration of the front truss portion 31. Specifically, as shown in FIG. The upper side chord member 32a, the rear side lower chord member 32b, the rear side bundle member 32c, and the rear side diagonal member 32d are provided. The upper truss portion 33 is a portion located on the upper side of the beam member 30, and is configured by combining a plurality of chord members. Specifically, as shown in FIG. A plurality of upper connecting chord members 33a are provided horizontally between the upper side chord members 32a and are arranged in parallel in the left-right direction at intervals. Further, the lower truss portion 34 is a portion located below the beam member 30, and is configured by combining a plurality of chord members. Specifically, as shown in FIG. 2, the front lower chord member 31b is formed. And the rear lower chord member 32b are horizontally provided, and a plurality of lower connecting chord members 34a are arranged in parallel in the left-right direction at intervals. The left truss portion 35 is a portion located on the left side of the beam member 30, and is configured by combining a plurality of chord members. Specifically, as shown in FIG. A pair of left side diagonal members 35a provided between the side truss portion 32 and the left side diagonal members 35a intersect each other in the lower connecting chord member 34a. The right truss portion 36 is a portion located on the right side of the beam member 30 and has substantially the same configuration as the left truss portion 35. Specifically, as shown in FIG. The diagonal member 36a is provided. In addition, in the embodiment, regarding the arrangement method (so-called allocation method) of the various bundle members in each of the plurality of beam members 30, all the various bundle members in each of the plurality of beam members 30 are arranged at the same position. Therefore, the twist of the roof frame 20 can be suppressed. The "upper connecting chord member 33a" and the "lower connecting chord member 34a" described above correspond to the "brace member" in the claims.

(Structure-Roof part-Roof panel)
Returning to FIG. 1, the roof panel 40 is for covering the upper surface of the roof frame 20. The roof panel 40 is configured by using, for example, a well-known roof panel (for example, an ALC panel or the like), and as shown in FIG. 1, a plurality of roof panels 40 are provided so as to cover the entire upper surface of the roof frame 20. It is fixed to 20 with a fixture or the like.

(Structure-Support)
The support part 50 is a part of the basic structure of the building 1 and supports the roof part 10. As shown in FIG. 1, the support portion 50 is arranged below the roof portion 10 so as to cover the periphery of the utilization space portion, and includes a front pillar portion 51, a rear pillar portion (not shown), and a left pillar portion. It includes a portion (not shown), a right pillar portion 54, an auxiliary beam portion 55, a left rail portion (not shown), and a right rail portion 57.

The front pillar portion 51 is a pillar portion located on the front side of the support portion 50. The front pillar portion 51 is configured using, for example, a well-known concrete pillar material, and specifically, as shown in FIG. 1A, the length of the front pillar portion 51 in the left-right direction is used. It is set to be shorter than the length of the space portion in the left-right direction, and the length in the front-rear direction of the front side column portion 51 is set to be shorter than the length of the space portion in the front-rear direction. It is set to be substantially the same as the vertical length of the space (the same applies to the other pillars). In addition, as shown in FIG. 1A, the front side column portion 51 is provided upright with respect to the installation surface C, and a plurality of front side column portions 51 are provided side by side in the left-right direction at intervals. The rear side pillar portion is a pillar portion located on the rear side of the support portion 50, and is provided upright with respect to the installation surface C, and a plurality of rear side pillar portions are arranged side by side in the left-right direction at intervals. The left side column portion is a column portion located on the left side of the support portion 50, is provided upright with respect to the installation surface C, and is provided in parallel in the front-rear direction at intervals. The right side pillar portion 54 is a pillar portion located on the right side of the support portion 50, and as shown in FIG. 1( b ), it is erected on the installation surface C, and a plurality of them are arranged in the front-rear direction at intervals. They are installed side by side. The auxiliary beam part 55 is a beam part for reinforcing each of the front side column part 51, the rear side column part, the left side column part, and the right side column part 54, and is configured using, for example, a well-known concrete beam material. As shown in FIG. 1, a plurality of pillars 51 are provided to connect the front pillars 51, the rear pillars, the left pillars, and the right pillars 54 to each other.

The left rail portion and the right rail portion 57 guide the beam member 30 so as to move along the front-rear direction when the roof frame 20 is constructed. The left-side rail portion and the right-side rail portion 57 are made of, for example, a known long rail material (steel rail material as an example) or the like, and are provided on the upper portion of the support portion 50. Specifically, the left-side rail portion is provided over the upper portions of all the left-side column portions arranged side by side, and is directly or indirectly connected to these left-side column portions. Further, as shown in FIG. 1B, the right rail portion 57 is provided over the upper portions of all the right side pillar portions 54 arranged side by side, and is directly or indirectly connected to the right side pillar portions 54. Connected to each other.

(Structure-Seismic isolation device)
The seismic isolation device is a device for isolating the roof portion 10 from seismic isolation. This seismic isolation device is configured by using, for example, a known seismic isolation device (as an example, a laminated rubber bearing, a sliding bearing, etc.), and is provided between the roof frame 20 and the support portion 50. Specifically, the left end portion of each beam member 30 of the roof frame 20 and the upper end portion of the left column portion (specifically, the left rail portion connected to the left column portion) or the vicinity thereof are respectively arranged. The beam member 30 and the left rail portion are connected to each other by a fixture or the like. In addition, the right end portion of each beam member 30 of the roof frame 20 and the upper end portion of the right side column portion (specifically, the right rail portion 57) are respectively arranged between or in the vicinity thereof, and the beam member 30 and the right rail portion are provided. The parts 57 are connected to each other by a fixture or the like. Further, among the beam members 30 of the roof frame 20, the beam members 30 and the front pillars are arranged between the lower end portion of the frontmost beam member 30 and at least one or more front pillar portions 51, respectively. The parts 51 are connected to each other by a fixture or the like. Further, the beam member 30 of the roof frame 20 is arranged between the lower end portion of the rearmost beam member 30 and at least one or more rear pillar portions, and the beam member 30 and the rear side member are disposed. It is connected to each of the columns by a fixture or the like.

(Structure-use space part)
The use space portion is a space portion that is used according to a predetermined purpose (for example, a sporting event), and is formed in, for example, a rectangular parallelepiped shape, and specifically, can accommodate a predetermined number of people, Further, it is formed as a space portion having a size capable of accommodating desired equipment (for example, spectator seats and competition equipment).

(How to build a roof frame)
Subsequently, a method of constructing the roof frame 20 according to the embodiment will be described. FIG. 3 is a perspective view showing a forming step of the method for constructing the roof frame 20 (partly not shown). FIG. 4 is a side view showing the traveling step of the method for constructing the roof frame, and is a diagram showing the first traveling step. FIG. 5: is a side view which shows the traveling process of the construction method of a roof frame|frame, and is a figure which shows the traveling process of the 2nd time. FIG. 6 is a side view showing the traveling step of the method for constructing the roof frame, and is a diagram showing the final traveling step. As shown in FIGS. 3 to 6, the method for constructing the roof frame 20 according to the embodiment includes a preparation step, a forming step, a traveling step, and a removal step. In addition, as a premise of the method of constructing the roof frame 20, it is assumed that the support portion 50 is installed on the installation surface C.

(Roof frame construction method-preparation process)
First, the preparation process will be described. The preparation step is a step of preparing for constructing the roof frame 20.

Specifically, as shown in FIG. 4, a traveling gantry 61 (for example, a traveling gantry 61 configured by combining steel frames) used in a traveling process using a crane 70 or the like at a position rearward of the support portion 50. Assemble. At a position near the traveling gantry 61, a crane 70 or the like is used to assemble an unillustrated framing gantry (for example, a framing gantry constructed by combining steel frames) used in the forming process. Further, a work scaffold (not shown) is attached to the support part 50, the traveling gantry 61, or the ground gantry.

(Roof frame construction method-forming step, traveling step)
Next, the forming process and the traveling process will be described. The forming step is a step of forming the beam set S after the preparation step. In the traveling step, after the forming step, the beam member set S is installed by traveling (laterally pulling) the beam member set S to a predetermined position (specifically, the installation position) while supporting only the end portion of the beam member set S. Is. Here, the "beam member set S" is a set in which a plurality of beam members 30 that constitute the roof frame 20 are combined and that has a rigidity of a predetermined amount or more, and in the embodiment, at least two. A set in which the above beam members 30 are combined will be described. However, the present invention is not limited to this, and may be, for example, a set in which a number of beam members 30 according to the shape and size of the beam members 30 are combined. Further, the rigidity of the predetermined amount or more may be set based on, for example, the analysis result of a known analysis method (for example, the finite element method) or the experimental result. In the embodiment, since a plurality of beam material sets S are formed and traveling is performed, the forming step and the traveling step are performed a plurality of times, respectively, and are performed in parallel.

Specifically, as shown in FIG. 3 and FIG. 4, in the first forming step and the traveling step, first, the beam member set S is formed on the ground structure frame using the crane 70 or the like, and then the crane 70 is formed. The beam set S is transported to the traveling gantry 61 by using the above. Here, the method of forming the beam member set S is arbitrary, but may be formed by, for example, connecting a plurality of beam members 30 by welding or a fixture. In this case, the front truss portion 31 or the rear truss portion 32 of the adjacent beam members 30 may be formed in common, and as an example, adjacent one of the rear truss portions 32 of the adjacent beam members 30 may be formed. The other front side truss portion 31 of the beam member 30 may be formed by one truss portion. Next, using a known traveling method (for example, a traveling method using a jack or a wire), the left end portion of the beam member set S is supported on the left rail portion, and the right end portion of the beam member set S is connected to the right rail portion. Corresponding to each beam 30 of the beam set S after traveling the beam set S to the installation position in the state of being supported by the portion 57 (after traveling the beam set S forward in FIG. 4 ). It installs by connecting each of the left side column part and the corresponding right side column part 54 via a seismic isolation device. In particular, in the embodiment, as described above, since each beam member 30 of the beam member set S is provided with the upper connecting chord member 33a and the lower connecting chord member 34a, the upper connecting chord member 33a and the lower connecting chord member 33a are provided. The horizontal displacement of each beam member 30 can be suppressed as compared with the case where the connecting chord member 34a is not provided, and each beam member 30 can be installed accurately (note that the forming process and the traveling process after the second time described below). The same shall apply).

Next, as shown in FIG. 5, in the second and subsequent forming steps and the traveling step, similarly to the first forming step and the traveling step, the beam material set S is formed, and the beam material set S up to the traveling gantry 61. After the transportation, the beam set S is traveled to the installation position and is connected to each of the left column and the corresponding right column 54 corresponding to each beam 30 of the beam set S through the seismic isolation device. Will be installed.

Subsequently, as shown in FIG. 6, the forming process and the traveling process after the second time are repeated a plurality of times until all the beam members 30 constituting the roof frame 20 have been traveled to the installation position and installed.

Here, the number of the beam members 30 of the beam member set S is arbitrary, but in the embodiment, the number of the beam members 30 of the beam member set S corresponding to the second and subsequent traveling steps is set to the first traveling time. The number of beam members 30 of the beam member set S corresponding to the process is set to be equal to or smaller than that. For example, as shown in FIGS. 4 and 5, when the number of beam members 30 of the beam member set S corresponding to the first traveling step=5, the beam member set S corresponding to the second traveling step is The number of beam members 30 may be set to 2. As a result, in the first traveling step, horizontal displacement of each beam 30 of the beam set S can be reliably suppressed during traveling of the beam set S or installation of the beam set S. Further, in the second and subsequent traveling processes, the horizontal displacement of each beam 30 of the beam set S that occurs during the traveling process (specifically, during the traveling or installation of the beam set S) is suppressed while traveling. The process can be performed quickly, and the roof frame 20 can be constructed accurately and quickly.

(Roof frame construction method-removal process)
Then, a removal process is demonstrated. The removal step is a step of removing the traveling gantry 61, the ground gantry, and the work scaffold after the forming step and the traveling step. Specifically, the traveling gantry 61, the ground gantry, and the work scaffolding are disassembled by using the crane 70 or the like, and are removed.

With the construction method as described above, compared with the case where a single beam member 30 is installed by traveling, horizontal displacement of each beam member 30 of the beam member set S that occurs during the traveling step can be suppressed, and the roof frame 20 can be accurately formed. It is possible to build.

(Effects of the embodiment)
As described above, according to the embodiment, the forming step of forming the beam member set S that is a combination of a plurality of beam members 30 that configure the roof frame 20 and that has a rigidity of a predetermined amount or more, and formation. After the step, a traveling step of traveling and installing the beam member set S to a predetermined position in a state where only the end portion of the beam member set S is supported is included. Therefore, the single beam member 30 is installed by traveling. Compared with the case, horizontal displacement of each beam member 30 of the beam member set S that occurs during the traveling process (specifically, during the traveling or installation of the beam member set S) can be suppressed, and the roof frame 20 can be constructed accurately. It becomes possible to do.

The beam member 30 is a brace member horizontally provided between a pair of upper chord members or between a pair of lower chord members, and connects the pair of upper chord members or the pair of lower chord members to each other. Therefore, the horizontal displacement of the beam member 30 can be suppressed as compared with the case where the brace member is not provided, and the beam member 30 can be installed accurately.

Further, when the traveling process is performed on each of the plurality of beam member sets S, the number of the beam members 30 of the beam member set S corresponding to the second and subsequent traveling processes is changed to the beam member corresponding to the first traveling process. Since the number of beam members 30 in the set S is equal to or less than the number of beam members 30 in the set S, in the second and subsequent traveling processes, the traveling process is performed while suppressing the horizontal displacement of each beam member 30 in the beam member set S that occurs during the traveling process. This can be done quickly, and the roof frame 20 can be constructed accurately and quickly.

[III] Modifications to Embodiments The embodiments of the present invention have been described above. However, the specific configuration and means of the present invention are within the scope of the technical idea of each invention described in the claims. , And can be arbitrarily modified and improved. Hereinafter, such a modified example will be described.

(About problems to be solved and effects of the invention)
First, the problems to be solved by the invention and the effects of the invention are not limited to the contents described above, and the present invention solves problems not described above or effects not described above. In some cases, only some of the problems described may be solved, or only some of the effects described may be achieved.

(About shape, numerical value, structure, time series)
Regarding the components illustrated in the embodiments and drawings, the shapes, numerical values, or the structure or the time series relationship of a plurality of components may be arbitrarily modified and improved within the scope of the technical idea of the present invention. You can

(About beams)
Although the beam member 30 has been described as a truss beam in the above-described embodiment, the beam member 30 is not limited to this and may be, for example, a honeycomb beam, a lattice beam, or a box beam.

Further, in the above embodiment, the beam member 30 includes the upper connecting chord member 33a and the lower connecting chord member 34a (that is, the brace member connecting the pair of upper chord members and the pair of lower chord members). However, not limited to this, for example, at least one of the upper connecting chord member 33a and the lower connecting chord member 34a may be omitted (however, the upper connecting chord member 33a and the lower connecting chord member 33a). When both of the connecting chord members 34a are omitted, the upper connecting chord member 33a or the lower connecting chord member 34a located on the leftmost side and the right side is excluded).

(About how to construct the roof frame)
In the above embodiment, the method for constructing the roof frame 20 has been described as including the preparation step and the removal step, but the method is not limited to this. For example, when the components and equipment of the existing building 1 can be used as the traveling gantry 61, the ground gantry, and the scaffold for work, the preparation process and the removal process may be omitted.

Further, in the above-described embodiment, in the traveling process, the number of the beam members 30 of the beam member set S corresponding to the second and subsequent traveling processes is changed to the beam member 30 of the beam member set S corresponding to the first traveling process. Although it has been described that the number is set to be equal to or smaller than the number, the number is not limited to this, and may be set to be larger than the number of the beam members 30 of the beam member set S corresponding to the first traveling step. ..

(Appendix)
The method for constructing a roof frame of appendix 1 is a method for constructing a roof frame of a building, which is a set in which a plurality of beam members constituting the roof frame are combined and which has a rigidity of a predetermined amount or more. And a traveling step of, after the forming step, moving and setting the set to a predetermined position while supporting only the end portion of the set.

The method for constructing a roof frame according to appendix 2 is the method for constructing a roof frame according to appendix 1, wherein the beam is a truss beam having a pair of upper chord members and a pair of lower chord members, and A brace material is provided horizontally between each other or between the pair of lower chord members, and includes a brace material that connects the pair of upper chord members or the pair of lower chord members.

The method of constructing a roof frame of appendix 3 corresponds to the second or subsequent traveling step in the method of constructing a roof frame according to appendix 1 or 2, when the traveling step is performed on each of the plurality of sets. The number of the beam members of the set is equal to or smaller than the number of the beam members of the set corresponding to the first traveling step.

(Effect of notes)
According to the method for constructing a roof frame described in appendix 1, a forming step of forming a set having a plurality of beam members forming the roof frame and having a rigidity of a predetermined amount or more, and after the forming step, Since it includes a traveling step of moving the set to a predetermined position while supporting only the end of the set, compared to the case of installing a single beam member during the traveling step (specific In addition, horizontal displacement of each beam member of the set that occurs during traveling or installation of the set can be suppressed, and the roof frame structure can be accurately constructed.

According to the method for constructing a roof frame described in appendix 2, the beam member is a brace member horizontally provided between a pair of upper chord members or between a pair of lower chord members, and a pair of upper chord members are provided. Alternatively, since the brace member for connecting the pair of lower chord members is provided, horizontal displacement of the beam member can be suppressed as compared with the case where the brace member is not provided, and the beam member can be accurately installed.

According to the method for constructing a roof frame described in appendix 3, when the traveling process is performed on each of a plurality of sets, the number of beam members in the set corresponding to the second and subsequent traveling processes is set to the first traveling process. Since the number of beam members of the set corresponding to is equal to or less than that of the beam members of the set, in the second and subsequent traveling processes, the traveling process is quickly performed while suppressing the horizontal displacement of each beam member of the set that occurs during the traveling process. Therefore, the roof frame can be constructed accurately and quickly.

1 Building 10 Roof part 20 Roof frame structure 30 Beam material 31 Front truss part 31a Front upper chord material 31b Front lower chord material 31c Front bundle material 31d Front diagonal material 32 Rear truss part 32a Rear upper chord material 32b Rear lower chord material 32c Rear bundle Material 32d Rear diagonal member 33 Upper truss portion 33a Upper connecting chord member 34 Lower truss portion 34a Lower connecting chord member 35 Left truss portion 35a Left diagonal member 36 Right truss portion 36a Right diagonal member 40 Roof panel 50 Support portion 51 Front side Column 54 Right column 55 Auxiliary beam 57 Right rail 61 Traveling gantry 70 Crane C Installation surface S Beam material set

Claims (3)

A construction method for constructing a roof frame of a building,
A forming step of forming a set having a plurality of beam members constituting the roof frame and having a rigidity of a predetermined amount or more;
After the forming step, a traveling step of setting the set by traveling to a predetermined position while supporting only the end of the set,
A method of constructing a roof frame including. The beam is
A truss beam having a pair of upper chord members and a pair of lower chord members,
A brace material that is horizontally provided between the pair of upper chord members or between the pair of lower chord members, and includes a brace member that connects the pair of upper chord members or the pair of lower chord members.
The method for constructing a roof frame according to claim 1. When the traveling step is performed on each of the plurality of sets, the number of the beam members of the set corresponding to the second and subsequent traveling steps is set to the number of the beam members of the set corresponding to the first traveling step. Be equal to or less than the number of materials,
A method for constructing a roof frame according to claim 1 or 2.

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