JP3916535B2 - Roof composite beam structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a composite beam structure that is advantageous when renovating an existing house roof beam to increase the load of load or force.
[0002]
[Prior art]
As one form of reforming the roof of a house, there is a case where the current flat roof is made into a sloped roof or a hut space is used. In this case, a load of a newly installed gradient roof, a wind acting on the gradient roof, a force during an earthquake, a loading load using the shed space, and the like are generated as a new load. The newly generated load may be a value that can be safely borne by the existing roof beams, but if it cannot be safely borne, it is essential to reinforce the existing roof beams to ensure safety. Become.
[0003]
As a construction method for reinforcing existing roof beams, part of the interior of the ceiling is removed and the existing roof beams are replaced with new roof beams, or new beams are placed under the existing roof beams. (1st method) or a method of removing a flat roof along an existing roof beam and then integrating a new beam along the existing roof beam by welding or the like (second method) ), There is a method of connecting a new roof beam designed to support the new roof to the joint column by fixing the joint column to the upper part of the existing column by means such as welding (third method), etc. .
[0004]
[Problems to be solved by the invention]
In the first method, since the interior of the ceiling is removed, the work is performed indoors, and the problem of causing great inconvenience to the residents and the specifications of the existing roof beams are changed. There is a problem that the number of beams increases and the ceiling becomes lower.
[0005]
Moreover, even if it is a 2nd method, in order to remove a part of a land roof, although work is performed on a roof, there exists a problem that it does not change a great inconvenience to a resident.
[0006]
In the third method, the newly installed roof beam using the connecting column supports the new roof regardless of the existing roof beam, and the removal range of the land roof is limited to the existing column. Therefore, workability can be improved. However, in order to weld the connecting column to the existing column, it is necessary to remove the roof and ceiling around the existing column greatly, which will cause great inconvenience to the residents, and connect to the connecting column Since the new roof beam has a specification that can bear the roof load alone, a large number of steel frames are eventually used, and there is a problem that waste occurs.
[0007]
It is an object of the present invention to provide a roof composite beam structure that can reduce inconvenience to residents as much as possible and can reasonably reinforce existing roof beams.
[0008]
[Means for Solving the Problems]
In order to solve the above-described problems, the roof composite beam structure according to the present invention has a plurality of holes formed in a roof panel directly above an existing roof beam along the roof beam, and a vertical portion and both ends of the vertical portion. The lower mounting piece and the upper mounting piece each have a plurality of bolt holes formed therein, and the bolt holes formed in the lower mounting piece are formed in the upper mounting piece. A joint hardware configured to be disposed inside the bolt hole and configured so that at least the upper mounting piece is not located immediately above the bolt hole formed in the lower mounting piece is used as a roof beam using the hole. At the same time as attaching, a reinforcing beam is connected to the metal joint.
[0009]
In the above-mentioned roof composite beam structure (hereinafter simply referred to as “composite beam”), a plurality of holes are formed in the roof panel immediately above the existing roof beam, and the joint hardware is connected to the existing roof beam (hereinafter simply referred to as “simple roof beam”). The roof beam and the reinforcing beam are joined to each other at a plurality of portions in the length direction by attaching the reinforcing beam, which is usually a steel beam or a wooden beam, to the joint hardware. For this reason, the load and force increased by the reforming are transmitted from the reinforcing beam to the roof beam through the joint metal, and these forces can be borne by the reinforcing beam and the roof beam. That is, it is possible to configure a composite beam in which a reinforcing beam and a roof beam are joined through a joint metal.
[0010]
Moreover, since the bolt hole formed in the lower attachment piece is formed inside the bolt hole formed in the upper attachment piece, the lower attachment piece can be made smaller than the upper attachment piece. For this reason, it becomes possible to reduce the area of the site | part which should be removed in the existing roof panel, and can improve workability | operativity by making the area of the roof panel which should be removed small.
[0011]
Furthermore, since the upper mounting piece is configured without being positioned immediately above the bolt hole formed in the lower mounting piece of the joint hardware, the bolt hole formed in the lower mounting piece can be seen from directly above the joint hardware. The bolt can be easily fastened by using a tightening tool such as a box wrench having a long shank.
[0012]
In particular, when a reinforcing beam is joined to a roof beam, it is only necessary to form holes in existing roof panels at a plurality of positions along the roof beam, so that the area of the roof panel to be removed can be reduced. Moreover, since the operation | work which removes the existing roof panel and the operation | work which attaches a joining metal fitting to a roof beam can be performed by the operation | work from an upper side (roof upper side), the trouble to a resident can be reduced as much as possible.
[0013]
In the above composite beam structure, a hole is formed in the roof panel directly above the existing pillar, and the connecting hardware is placed on the pillar using the hole, and the end of the reinforcing beam is connected to the connecting hardware. It is preferable to do. By configuring the composite beam structure in this way, a plurality of reinforcing beams concentrated on one column can be connected by a connecting hardware. For this reason, a part of the vertical force acting on the reinforcing beam can be transmitted directly to the existing column via the connecting hardware, and when the composite beam is constructed with the reinforcing beam along the roof beam, the roof beam An excessive shearing force is not applied to the connecting portion between the column and the existing column.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the composite beam structure according to the present invention will be described. The present invention relates to a composite beam structure in which when a load on a roof beam (existing roof beam) increases when renovating an existing house, a reinforcing beam is placed along the roof beam and joined with a joint metal fitting. In addition, by reducing the roof removal area of existing houses as much as possible, the inconvenience to residents is reduced and rational roof beam reinforcement is realized.
[0015]
The content of the reform that increases the load on the roof beam is not particularly limited. As such reforms, for example, the land roof in the existing house is made into a sloped roof such as a dormitory roof or a gable roof, the land roof is made into a sloped roof and the hut space can be used, There are cases where it is possible to use an attic space that is not currently used.
[0016]
There is no particular limitation on the structure of the existing house. Therefore, the existing housing can be preferably applied regardless of whether it is a wooden structure or a steel structure. However, in the case of a wooden structure, there is generally a variation in material homogeneity, and there is a problem that it is difficult to calculate the joint strength at the column-beam and beam-beam junction. This point steel structure is preferable because the material is uniform and the quality is stable, and the strength of the joint is also stable.
[0017]
From the above points, an industrialized house having a steel frame and having a roof formed by attaching a roof panel made of a lightweight cellular concrete panel (ALC panel) to the steel frame is preferable. In such a house, it is common to use a beam in which H-shaped steel flanges are horizontally arranged as a beam.
[0018]
The reinforcing beam is composed of a steel beam or a wooden beam, and is arranged along the roof beam that needs to be reinforced in advance, and is joined to the roof beam via joint hardware arranged in a plurality of longitudinal portions. The
[0019]
When considering whether or not reinforcement is required for roof beams, the load and load capacity of newly installed gradient roofs are set, and the reinforcement of roof beams placed on existing land roofs is set according to these loads. Necessity is determined. In other words, conditions for the beam length, function, etc., which serve as a standard for necessity of reinforcement, are set in advance, and the load on the slope roof and the roof beam that supports the roof load are compared with the above-mentioned criteria. The roof beam that satisfies the above is determined as a roof beam that requires reinforcement.
[0020]
Reinforcement beams do not have to have the same cross-sectional conditions as materials for roof beams, such as materials and blisters, but are set according to the load to be borne and the load conditions that can be borne by existing roof beams. . The length of the reinforcing beam need not be the same as the length of the roof beam, but is preferably substantially the same or the same.
[0021]
When the reinforcing beam is joined to the roof beam, the reinforcing beam is not along and integrated with the roof beam already arranged on the roof of the house, but is separated along the thickness of the roof. That is, the roof beam is arranged on the indoor side of the roof panel, Reinforcement beam Is arranged on the upper surface side of the roof panel, and both beams are integrated through joint hardware arranged at a plurality of positions in the length direction.
[0022]
Therefore, when a new load is applied to the reinforcing beam, the load is transmitted to the roof beam via the joint hardware, and is further supported by the pillar supporting the roof beam. That is, although the reinforcing beam and the roof beam are spaced apart from each other, the function as a composite beam can be exhibited by integrating them through the joint metal.
[0023]
The joint hardware is provided with a lower mounting piece for the roof beam at the lower end, and an upper mounting piece for attaching the reinforcing beam at the upper end. The distance between the lower mounting piece and the upper mounting piece is determined by the mounting surface for the roof beam (generally Is set to a height at which the lower surface of the reinforcing beam can avoid the upper surface of the roof.
[0024]
When attaching the joint hardware to the roof beam, the work is preferably performed only from the upper surface side of the roof. For this reason, a hole is formed in the upper flange of the roof beam by a drilling operation from the roof, and a one-side fastener or a Mighty lock ( Registered trademark It is preferable that the joint hardware can be attached to the roof beam by using a bolt connection.
[0025]
As mentioned above, it is configured to attach the joint hardware to the roof beam using a one-side fastener, etc., so that all necessary for renovation such as removal work of the roof panel, drilling work on the roof beam, attachment work of the joint hardware, etc. The above work can be performed from the upper side of the roof, the workability is improved, and the inconvenience to the resident can be reduced.
[0026]
When attaching the joint hardware to the roof beam, in order to perform the work from the roof surface, it is preferable to shift the position of the bolt hole formed in the lower mounting piece and the position of the bolt hole formed in the upper mounting piece without matching. . In this case, the bolt hole formed in the lower mounting piece may be set to any size within the range of the upper flange of the roof beam, and the bolt hole formed in the upper mounting piece may be set to any size within the size range of the reinforcing beam. May be set.
[0027]
However, when removing the roof panel, it is preferable to arrange the bolt hole of the lower mounting piece inside the bolt hole of the upper mounting piece in order to reduce the removal amount and facilitate the work. By making the relationship between the upper and lower bolt holes in this way, it is possible to make the hole formed in the roof panel by making the size of the lower mounting piece smaller than the size of the upper mounting piece.
[0028]
Moreover, it is preferable that the upper part of the bolt hole formed in the lower attachment piece in the metal joint is open. In this case, since there is no obstructive member above the bolt hole formed in the lower attachment piece, it is possible to easily perform the operation of attaching the joint hardware to the roof beam from the upper side of the roof.
[0029]
As the load acting on the roof beam increases, the load acting on the connection portion connecting the roof beam and the column also increases. For this reason, the shear force which acts on the bolt etc. which are arrange | positioned at the connection site | part of a roof beam and a pillar will also increase.
[0030]
In this case, the vertical force acting on the reinforcing beam is directly transmitted to the column through the connecting metal by placing the connecting metal directly on the existing column and connecting the reinforcing beam to the connecting metal. Is required. In this way, it is possible to share a part of the shearing force acting on the bolt arranged at the connection site between the roof beam and the column by the connecting hardware. The connecting hardware has a function of transmitting a force in the vertical direction to an existing column, and may be placed on the top of the column.
[0031]
The shape of the existing column is not particularly limited, and any column such as a column using H-shaped steel or channel steel, or a tube column configured by tying a square pipe or lip channel steel, etc. It is possible to respond.
[0032]
Next, an example in which an existing flat roof is reformed to a sloped roof using the composite beam structure and the joint hardware according to the present invention will be described. FIG. 1 is a perspective view illustrating the structure of a sloped roof. FIG. 2 is a perspective view for explaining a roof structure of a sloped roof. FIG. 3 is a diagram illustrating the configuration of the composite beam. FIG. 4 is a diagram for explaining a state in which the composite beam is connected to a connecting hardware placed directly on an existing column. FIG. 5 is a diagram for explaining the configuration of the metal joint. FIG. 6 is a view for explaining another example of the metal joint. FIG. 7 is a view for explaining the structure of the connecting hardware.
[0033]
First, the structure of the newly installed gradient roof will be briefly described with reference to FIGS. When newly installing a sloped roof B on a flat roof A formed in a house having an existing steel frame, a ridge that constitutes the roof set on the upper surface of the flat roof A by creating a shed according to preset rules. The arrangement positions of 1, purlin 2, girder 3, rafter 4, bundle 5, bundle receiving beam 6, corner tree 7, etc. are set.
[0034]
The load on the sloped roof B is transmitted from the bundle 5 to the roof beam 11 (see FIG. 3), or is transmitted to the roof beam 11 via the bundle receiving beam 6. In particular, the necessity of reinforcement of the roof beam 11 disposed on the existing land roof A is determined according to the load of the gradient roof B acting on the bundle 5 and the roof load transmitted through the roof panel 12.
[0035]
That is, a roof having a function of supporting the load of the gradient roof B and the roof load via the bundle 5 by setting the conditions of the beam length, function, etc., which are used as a reference for necessity of reinforcement in advance. The beam 11 is compared with the above-mentioned standard, the roof beam 11 that satisfies the standard is determined as the roof beam 11 that needs reinforcement, and the reinforcing beam 13 is placed along the roof beam 11, thereby increasing the sloped roof B. When a load or a load to be borne by the roof panel 12 is transmitted, these loads can be supported.
[0036]
Thus, not all the roof beams 11 to which the load is transmitted via the bundle 5 need to be reinforced, and the roof beams 11 that need to be reinforced are determined in advance at the stage of renovation. In addition, specifications such as the material of the reinforcing beam 13, the cross-sectional shape, dimensions, and the length corresponding to the length of the roof beam 11 to be set are set, and the necessary reinforcing beam 13 is manufactured based on this specification.
[0037]
The reinforcing beam 13 is not directly along the target roof beam 11 but is arranged on the upper surface side of the roof panel 12 constituting the land roof A, and through the joint hardware 14 arranged at a plurality of positions in the longitudinal direction. Are joined. And the composite beam C shown in FIG. 3 is comprised by joining the roof beam 11 and the reinforcement beam 13 mutually.
[0038]
In other words, the composite beam C is a roof beam 11 that constitutes the existing land roof A, and the roof beam 11 that has been determined to be reinforced in advance is reinforced with a thickness separation of the land roof A. The beam 13 is constituted by being joined by a joining hardware 14.
[0039]
A bundle 5 is arranged on the upper part of the reinforcing beam 13 constituting the composite beam C, and the load including the roof load of the gradient roof B transmitted through the bundle 5 is transmitted through the reinforcing beam 13 and the joint hardware 14. The load transmitted to the roof beam 11 is transmitted to the existing column 16 via the bolt 15 and supported.
[0040]
There are no particular limitations on the number and the number of joint portions when the roof beam 11 and the reinforcing beam 13 are joined. In the present embodiment, the two beams 11 and 13 are joined at two locations on both ends. However, when the roof beam 11 and the reinforcing beam 13 are particularly long, it is preferable to join at both ends and the center. In this way, by joining the roof beam 11 and the reinforcing beam 13 at at least two locations, the beams 11 and 13 are integrated via the joint hardware 14, and the roof beam 11 is newly reinforced by the reinforcing beam 13. It is possible to function as C.
[0041]
The reinforcing beam 13 only needs to be able to reinforce the roof beam 11, and a steel beam or a wooden beam can be used. In the present embodiment, the reinforcing beam 13 uses H-section steel having a cross-sectional shape corresponding to a preset condition such as a load.
[0042]
As shown in FIG. 5, the metal joint 14 for joining the roof beam 11 and the reinforcing beam 13 includes a lower attachment piece 14 a attached to the flange 11 a of the roof beam 11 and an upper attachment piece 14 b attached to the flange 13 a of the reinforcement beam 13. A bolt hole 14c formed in the lower mounting piece 14a, a bolt hole 14d formed in the upper mounting piece 14b, and a connection piece 14e serving as a vertical piece connecting both the mounting pieces 14a and 14b. Has been.
[0043]
The bolt hole 14c formed in the lower mounting piece 14a is set so as to be located inside the bolt hole 14d formed in the upper mounting piece 14b. Therefore, the lower mounting piece 14a has a width dimension substantially equal to the width of the flange of the roof beam 11 and a length set shorter than the length of the upper mounting piece 14b, and the upper mounting piece 14b is a reinforcing beam. 13 has a width dimension substantially equal to the width of the flange 13a and a length longer than the lower mounting piece 14a. Further, at least the upper mounting piece 14b is not located immediately above the bolt hole 14c formed in the lower mounting piece 14a, and there is no obstacle between the bolt hole 14c when viewed from above. . Therefore, when attaching the metal joint 14 to the roof beam 11, it is possible to easily proceed from the upper side with the work for inserting the bolt into the bolt hole 14 c formed in the lower attachment piece 14 a.
[0044]
Further, the connection piece 14e constituting the metal joint 14 is formed of an upright piece in which a single plate material is erected, and the height of the connection piece 14e depends on a predetermined distance between the roof beam 11 and the reinforcing beam 13. Is set.
[0045]
Next, a procedure for constructing the composite beam C by joining the reinforcing beam 13 to the preset roof beam 11 will be briefly described.
[0046]
As described above, among the roof beams 11, beams that need to be reinforced by the reinforcing beams 13 are set in advance, and the reinforcing beams 13 are set corresponding to the roof beams 11. Therefore, the flange 11a of the roof beam 11 is exposed by forming a hole having a diameter larger than that of the lower mounting piece 14a of the joint hardware 14 by a hole saw in the roof panel 12 immediately above the roof beam 11 to be reinforced. The joint hardware 14 is placed on the surface. After that, while confirming the bolt hole 14c formed in the lower mounting piece 14a of the metal joint 14 from above the flat roof A, the metal joint 14 is fixed by the fixture 17 that can be operated from one direction such as a one-side fastener.
[0047]
After attaching a predetermined number (2 to 3) of the joint hardware 14 to the target roof beam 11, the reinforcing beams 13 are placed on the upper mounting pieces 14b of these joint hardware 14, and the bolt holes 14d are used. Secure with bolts and nuts. Thereby, the composite beam C in which the roof beam 11 and the reinforcing beam 13 are integrated is configured.
[0048]
As described above, when the roof beam 11 and the reinforcing beam 13 are joined, holes are formed in the two to three roof panels 12 of the land roof A immediately above the roof beam 11 by a hole saw having a diameter of about 150 mm. The work of attaching the joint hardware 14 to the roof beam 11 can also be performed from the upper surface side of the land roof A. For this reason, it is possible to improve workability, and it is possible to perform renovation by causing a minimum inconvenience to residents.
[0049]
As a joint metal for joining the roof beam 11 and the reinforcing beam 13, a joint metal 18 configured as shown in FIG. 6 can be used in addition to the joint metal 14 described above. The joint metal 18 is formed in a C shape in a side view, and a lower mounting piece 18a is formed at the opposite end of the C shape, and an upper mounting piece 18b is formed at the C-shaped back portion. A bolt hole 18c is formed in the lower mounting piece 18a, and a bolt hole 18d is also formed in the upper mounting piece 18b. Further, two connection pieces 18e for connecting the lower attachment piece 18a and the upper attachment piece 18b are formed.
[0050]
In particular, the bolt hole 18c formed in the lower mounting piece 18a is formed to be inside the bolt hole 18d formed in the upper mounting piece 18c, and is opposed to the bolt hole 18c in the upper mounting piece 18b. An opening 18f is formed at the position where the one-side fastener can be operated using the opening 18f.
[0051]
Even when the metal joint 18 configured as described above is used, the composite beam C can be configured by reliably joining the roof beam 11 and the reinforcing beam 13.
[0052]
Note that the above-described joining hardware is not necessarily used only for joining the roof beam 11 and the reinforcing beam 13, and, for example, the outer street girder 3 shown in FIG. 2 is joined to the outer street beam (not shown). It can be used as the bonding hardware 20.
[0053]
That is, in the joint metal fitting according to the present invention, the bolt hole formed in the lower mounting piece is arranged inside the bolt hole formed in the upper mounting piece, so that the size of the lower mounting piece is larger than that of the upper mounting piece. Therefore, the area of the land roof A to be removed can be reduced.
[0054]
When the load transmitted from the reinforcing beam 13 to the roof beam 11 becomes larger than the allowable shearing force of the bolt 15 connecting the roof beam 11 and the column 16, the force acting on the reinforcing beam 13 is directly transmitted to the column 16. Therefore, it is necessary to configure so that it can be supported. In particular, it is general that the roof beam 11 does not have a large margin for supporting a new load, but compared with this, the margin for the force that the column 16 can support is large. For this reason, it is general that the increased load can be supported without applying special reinforcement to the column 16.
[0055]
In this case, as shown in FIG. 4, a hole is formed immediately above the column 16, and then a connecting metal 19 configured as shown in FIG. 7 is placed on the column 16, and the reinforcing beam 13 is placed on the connecting metal 19. In addition to connecting the existing column 16 and the roof beam 11, the connecting portion of the composite beam C and the column 16 is connected to the column 16 via the reinforcing beam 13 and the connecting hardware 19. It is possible.
[0056]
The connecting hardware 19 is a connecting piece for connecting a main body 19 a having a cross-sectional shape substantially equal to the cross-sectional shape of the column 16 and a connecting member 20 fixed to a predetermined position in the height direction and provided on the web 13 b of the reinforcing beam 13. 19b. The connecting hardware 19 is disposed only by being placed on the top of the existing column 16, and the web 13 b of the reinforcing beam 13 constituting the composite beam C is connected to the connecting piece 19 b through the bolt 15.
[0057]
By connecting the roof beam 11 and the reinforcing beam 13 constituting the composite beam C to the existing column 16 and the connecting piece 19b of the connecting hardware 19 as described above, the roof load of the gradient roof B acting on the reinforcing beam 13 is included. It is possible to transmit the load to the column 16 through the roof beam 11 and to the column 16 through the reinforcing beam 13 and the connecting hardware 19 to be supported by the column 16.
[0058]
As described above, a plurality of holes are formed by a hole saw immediately above the roof beam 11 that needs to be reinforced in the existing land roof A, and the joint metal fitting 14 is inserted into the hole and attached to the roof beam 11. It is possible to construct a composite beam C by joining a reinforcing beam 13 to 14, and further, a hole 19 is formed by a hole saw immediately above an existing column 16, and a connecting hardware 19 is inserted and placed on the column 16. In addition, by connecting the reinforcing beam 13 to the connecting hardware 19, it is possible to support a load larger than the load that the roof beam 11 can support alone.
[0059]
【The invention's effect】
As explained in detail above, the composite beam structure according to the present invention can be constructed from the upper side of the existing roof. For this reason, it is not necessary to remove the interior, and the construction can proceed with the residents living. In addition, the removal of the waterproof layer, heat insulating material and roof panel of the roof can be minimized, and the waterproof curing can be simplified.
[0060]
Further, since the increased load and force are transmitted from the reinforcing beam to the roof beam via the joint metal, these forces can be borne by the reinforcing beam and the roof beam. In particular, when a connecting hardware is placed on a pillar using a hole formed directly above an existing pillar and a reinforcing beam is connected using the connecting hardware, part of the vertical force acting on the reinforcing beam Is not directly transmitted to the existing column via the connecting hardware, and an excessive shearing force is not applied to the connecting portion between the roof beam and the existing column.
[0061]
Further, in the joint metal fitting according to the present invention, the bolt hole formed in the lower mounting piece is formed inside the bolt hole formed in the upper mounting piece, so that the lower mounting piece can be made smaller than the upper mounting piece. I can do it. For this reason, it becomes possible to reduce the area of the site | part which should be removed in the existing roof panel, and can improve workability | operativity by reducing the area of the roof panel which should be removed.
[0062]
Further, in the above-mentioned joint hardware, since the upper mounting piece does not exist at the upper part of the lower mounting piece, the bolt hole formed in the lower mounting piece becomes visible from the upper surface side. Work can be done from the top side. For this reason, all the work including the work which makes a hole in a roof, the work which makes a hole in a roof beam, and the work which attaches a joint metal fitting to a roof beam can be performed from the roof upper side, and the trouble to a resident can be reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view illustrating a structure of a sloped roof.
FIG. 2 is a perspective view for explaining a roof assembly of a sloped roof.
FIG. 3 is a diagram illustrating a configuration of a composite beam.
FIG. 4 is a diagram for explaining a state in which a composite beam is coupled to a coupling hardware placed directly on an existing column.
FIG. 5 is a diagram for explaining a configuration of a metal joint.
FIG. 6 is a diagram for explaining another example of a metal joint.
FIG. 7 is a diagram illustrating a configuration of a connected hardware.
[Explanation of symbols]
A flat roof
B sloped roof
C Composite beam
1 Purlin
2 Purlin
3 digits
4 rafters
5 bundles
6 Bundle receiving beam
7 Sumiki
11 Roof beams
11a Flange
12 Roof panel
13 Reinforcement beam
13a Flange
13b web
14,18 Joint hardware
14a, 18a Lower mounting piece
14b, 18b Upper mounting piece
14c, 14d, 18c, 18d
Bolt hole
14e, 18e Connection piece
18f opening
15 volts
16 pillars
17 Fixing tool
19 Consolidated hardware
19a body
19b connecting piece
20 Bonded hardware

Claims (2)

A plurality of holes are formed in the roof panel immediately above the existing roof beam along the roof beam, and each has a vertical portion and a lower mounting piece and an upper mounting piece attached to both ends of the vertical portion. Each of the upper mounting pieces is formed with a plurality of bolt holes, and the bolt holes are configured such that the bolt holes formed in the lower mounting pieces are arranged inside the bolt holes formed in the upper mounting pieces and formed in the lower mounting pieces. The roof is characterized in that at least an upper mounting piece is not positioned immediately above the bolt hole, and a reinforcing beam is connected to the bonding beam and attached to the roof beam using the hole. Composite beam structure. A hole is formed in a roof panel directly above an existing column, and a connecting hardware is placed on the column using the hole, and an end of a reinforcing beam is connected to the connecting hardware. The roof composite beam structure described in 1.

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