JP6904867B2 - Connecting girders and balconies with them - Google Patents

Description

The present invention relates to a connecting girder of a balcony attached to a building frame such as a detached house and a balcony provided with the connecting girder.

Conventionally, a depth connection type balcony having a first balcony portion attached to the building frame and a second balcony portion connected to the front side of the first balcony portion is known (upper left of page 1 of Non-Patent Document 1). See section "Depth Concatenation").
The first balcony part and the second balcony part are formed on a pair of columns, a girder attached to the pair of columns, a girder attached to the pair of columns, and a floor formed by the girder and the girder. It is equipped with the arranged joists and multiple deck materials arranged side by side on the joists.
The girder material in the first balcony portion is configured as a connecting girder on which the joists and deck materials of both the first and second balcony portions are hung. The girder material in the second balcony portion is configured as a front girder located in front of the connecting girder in the depth direction.
Regarding the balcony configured in this way, in FIG. 4, reference numerals 1 are attached to the connecting girders, reference numeral 2 is attached to the front girders, and reference numerals 3A and 3B are attached to the deck materials. The connecting girder 1 connects the deck material 3A on the building frame side and the deck material 3B on the front girder 2 side, whereby the floor area of the balcony can be widened.

"'15 -September revised assembly / construction manual balcony BC-X type", '15 -September issue, YKK AP, [August 28, 2017 search], Internet (http://manualweb.ykkap.co. jp / pdf_inter / 10050/96656C201B00.pdf)

By the way, in the balcony described in Non-Patent Document 1, since the connecting girder 1 supports both the deck material 3A on the building frame side and the deck material 3B on the front girder 2 side, the connecting girder 1 supports the deck material 3B. A load larger than the load applied to the front girder 2 is applied. For this reason, the connecting girder 1 is formed with a vertical dimension larger than that of the front girder 2 because it needs to be rigid enough to withstand the large load described above.
When the connecting girder 1 is formed with a large vertical dimension in this way, the connecting girder 1 becomes larger and heavier than the front girder 2, and it is difficult to reduce the work load of processing and construction. Further, if the upper surfaces of the front girder 2 and the connecting girder 1 are aligned at substantially the same height position, the connecting girder 1 protrudes downward by the dimension A shown in FIG. 4 from the front girder 2, which is not preferable in terms of the design of the balcony. ..

An object of the present invention is to provide a connecting girder that can withstand the load of a deck material, can be miniaturized, can reduce the work load of processing and construction, and can improve the design, and a balcony provided with the connecting girder. To do.

The connecting girder of the present invention includes a girder body having a hollow portion and a reinforcing material arranged in the hollow portion, and the girder body has joist hooks on both side edges along the longitudinal direction thereof. The reinforcing material is characterized in that it extends in the longitudinal direction of the girder body.
According to the connecting girder of the present invention, the girder body is reinforced by arranging the reinforcing material extending in the longitudinal direction of the girder body in the hollow portion. It is possible to obtain enough rigidity to withstand the load applied to the connecting girder when it is supported. Therefore, it is not necessary to increase the vertical dimension of the girder body to increase the rigidity, and the connecting girder can be miniaturized. In addition, since the girder body can be miniaturized, it becomes lightweight, and the work load of processing and construction of the girder body before arranging the reinforcing material in the hollow portion can be reduced. Further, even when the upper surfaces of the front girder and the connecting girder are aligned at substantially the same height position, the height position of the lower surface of the connecting girder can be arranged at the same position as or above the height position of the lower surface of the front girder. The dimensional design can be made, and the design of the balcony can be improved.

In the connecting girder of the present invention, the girder body has a girder upper piece, a pair of girder side pieces, and a girder lower piece, and the reinforcing material is a reinforcing upper piece and a pair of reinforcing side pieces. It is preferable that the reinforcing lower piece portion is in contact with the girder upper piece portion, and the reinforcing lower piece portion is in contact with the girder lower piece portion.
According to such a configuration, even if the girder body is to be bent downward by the load applied to both joist hooks of the connecting girder, the reinforcing upper piece and the reinforcing piece are in contact with the girder upper piece and the girder lower piece, respectively. The lower piece can suppress the bending of the girder body.

In the connecting girder of the present invention, the joist hook is fastened to the girder side piece portion, and a recess portion extending in the longitudinal direction is formed in the reinforcing side piece portion, and the joist hook is said to be the same. The fastener fixed to one portion on the girder side is preferably arranged in the space surrounded by the recessed portion in the hollow portion.
According to such a configuration, the reinforcing material can be inserted into the hollow portion without interfering with the fastener even when the joist hook is fastened, and the workability can be improved.

In the connecting girder of the present invention, it is preferable that the reinforcing side piece portion is formed with a contact protrusion projecting toward the girder side piece portion.
According to such a configuration, when the contact protrusion of the reinforcing side piece comes into contact with the girder side piece, the part other than the contact protrusion becomes non-contact with the girder side piece, and the girder of the reinforcing material The contact area with the main body can be reduced. Therefore, the frictional resistance force generated when the reinforcing material is inserted into the hollow portion of the girder body can be reduced, and the work load can be reduced.

In the connecting girder of the present invention, the joist hook has a fixed piece portion arranged along the girder side piece portion and a joist receiving piece portion bent from the lower edge portion of the fixed piece portion. It is preferable that the reinforcing side piece portion is formed with a contact protrusion projecting toward the girder side piece portion, and the contact protrusion portion is arranged below the recessed portion. ..
According to such a configuration, when the load of the deck material and the joist is applied to the joist, the lower part of the fixed piece in addition to the fastening part of the joist is pressed against the girder side piece, but the contact protrusion is formed. The girder body can be reinforced by contacting the girder side piece at a position below the fastening portion.

In the connecting girder of the present invention, it is preferable that the reinforcing material is fastened to an end portion of the girder body in the longitudinal direction.
According to such a configuration, after inserting the reinforcing material from the end portion in the longitudinal direction of the girder body into the hollow portion, the operator hardly moves the reinforcing material from the position on the end side in the longitudinal direction of the girder body. It can be fastened to the girder body and the work load can be reduced.

The balcony of the present invention has a first balcony portion and a second balcony portion connected to the first balcony portion, and the first balcony portion and the second balcony portion have a pair of columns and a pair of columns. A plurality of girders attached to the pair of columns, a wife beam attached to the pair of columns, a root bar formed on the girder member and the floor portion formed by the wife beam, and a plurality of girders on the root thickness. Each of the deck materials is provided side by side, and the girder material in the first balcony portion is characterized by being composed of the connecting girder of the present invention described above.
According to the balcony of the present invention, the girder body of the connecting girder to which the load of both the deck materials of the first and second balconies is applied is reinforced by the reinforcing material extending in the longitudinal direction of the girder body. It is possible to construct a balcony capable of exerting the same action and effect as the above-mentioned connecting girder of the present invention.

According to the present invention, there is provided a connecting girder that can withstand the load of a deck material, can be miniaturized, can reduce the work load of processing and construction, and can improve the design, and a balcony equipped with the connecting girder. can do.

The perspective view which shows the schematic structure of the balcony which concerns on embodiment of this invention. The vertical sectional view which shows the balcony which concerns on the said embodiment. The vertical sectional view which shows the connecting girder of the balcony which concerns on the said embodiment. A vertical cross-sectional view showing a connecting girder of a conventional balcony.

[Structure of the present embodiment]
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIGS. 1 to 3, the balcony 10 according to the present embodiment is attached to a building frame such as a detached house, and has a first balcony portion 11 and a second balcony portion 12 connected to the first balcony portion 11. have.
In the figure, the X, Y, and Z-axis directions are orthogonal to each other, the X-axis direction is along the frontage direction of the balcony 10, and the Y-axis direction is along the vertical direction of the balcony 10, and the Z-axis direction. Is along the depth direction of the balcony 10. Further, FIG. 1 shows a state in which the balcony 10 is separated into a first balcony portion 11 and a second balcony portion 12 for convenience of explanation.

The first balcony portion 11 is formed by a pair of columns 21 and 22, connecting girders 40 (girder members) and end beams 23 and 24 attached to the columns 21 and 22, and connecting girders 40 and ends beams 23 and 24. A plurality of joists 60 (see FIG. 3) arranged on the floor portion 25 to be formed, and a plurality of deck members 70 arranged side by side on the plurality of joists 60 are provided. A handrail 26 with a lattice and a cap tree is installed above the end beams 23 and 24.
The connecting girders 40 are arranged along the X-axis direction and are fixed to the columns 21 and 22 at both ends thereof. The end beam 23 is arranged along the Z-axis direction and is fixed to the support column 21 at its front end. The end beam 24 is arranged along the Z-axis direction and is fixed to the support column 22 at its front end.

The plurality of joists 60 are arranged along the Z direction, one end of which is hung on the joist hook 28 screwed to the connecting girder 40 and bolted, and the other end of which is screwed to the building frame. It is hung on the joist hook 28 and bolted. These plurality of joists 60 are arranged side by side at intervals in the X-axis direction.
A rain gutter member 80 is attached to the upper surface of the end portion of the plurality of joists 60 on the connecting girder 40 side. The rain gutter member 80 includes a bottom piece 81 screwed to the joist 60, a pair of side pieces 82, 83 raised from the bottom piece 81, and a side of the side pieces 82, 83 on the connecting girder 40 side. It has a contact piece 84 extending from the piece 83 in the Z-axis direction. The bottom piece 81 and the side pieces 82 and 83 form a gutter portion, and the contact piece 84 is in contact with the girder side piece 422 described later of the connecting girder 40. Since there is the rain gutter member 80, the rainwater that enters between the cover material 45 and the deck material 70 does not fall as it is and is drained by the rain gutter member 80.
The cover material 45 and the mounting piece 427, and the side piece 83 and the mounting piece 427 of the gutter member 80 are sealed.

The plurality of deck members 70 are arranged along the X-axis direction, one end of which is in contact with the end beam 23 and the other end of which is in contact with the end beam 24. These plurality of deck materials 70 are arranged side by side in the Z-axis direction.
As shown in FIG. 3, each deck material 70 is formed of an extruded shape made of synthetic resin containing wood powder, and is formed by a hollow deck main body 71 and one of the deck main bodies 71 along the longitudinal direction. It has a hook-shaped hanging piece portion 72 formed on the side edge portion of the deck, and a gutter-shaped portion 73 formed on the other side edge portion along the longitudinal direction of the deck main body portion 71.
The deck main body 71 is screwed to the joist 60 at the center position in the Z-axis direction. The hanging piece portion 72 has a laterally extending piece portion 721 extending from one side edge portion of the deck main body portion 71, and a side piece portion 722 hanging downward from the laterally extending piece portion 721. The gutter-shaped portion 73 has a bottom piece portion 731 extending from the other side edge portion of the deck main body portion 71, and a side piece portion 732 raised upward from the bottom piece portion 731. Further, a laterally extending piece portion 733 extending from the other side edge portion of the deck main body portion 71 is formed at a position above the bottom piece portion 731. An opening is formed between the side piece portion 732 and the laterally extending piece portion 733 into which the hanging piece portion 72 of the adjacent deck member 70 can be inserted.
The hanging piece portion 72 of the deck material 70 adjacent to the connecting girder 40 in the Z-axis direction is hung on the rain gutter member 80. In the present embodiment, the side piece 722 is in contact with the side piece 82, but if the side piece 82 is arranged in the rain gutter space surrounded by the bottom piece 81 and the side pieces 82, 83, the side piece It may be separated from the portion 722. Further, the gutter-shaped portion 73 of the deck material 70 adjacent to the building skeleton is covered from above by the skeleton side cover material 100 attached to the building skeleton, and the seal member 101 attached to the skeleton side cover material 100 It is in contact with the upper surface of the laterally extending piece portion 733.

As shown in FIG. 3, the connecting girder 40 includes a girder main body 42 having a hollow portion 41 and a reinforcing member 43 arranged in the hollow portion 41.
The girder body 42 is formed of an extruded aluminum profile, and has a girder upper piece portion 421, a pair of girder side piece portions 422, 423, and a girder lower piece portion 424.
The girder piece portion 421 is formed with a thick portion 425 at both side edges along the longitudinal direction thereof and at the center between the side edges. The girder side pieces 422 and 423 are arranged on both side edges of the girder body 42 along the longitudinal direction.
Mounting piece portions 427 extending in the Z-axis direction are formed on the upper portions of the girder side piece portions 422 and 423, respectively, and a cover material 45 is attached to each of these mounting piece portions 427. Further, a joist hook 28 is screwed to each of the girder side pieces 422 and 423.
In the present embodiment, the recess 426 is formed in the lower piece portion 424 of the girder, but the recess 426 may not be provided.

Here, the cover material 45 is formed so as to extend in a plate shape along the longitudinal direction of the connecting girder 40, and is screwed to the mounting piece portion 427. The cover material 45 is arranged from the mounting piece portion 427 to the upper surface of the deck material 70 adjacent to the connecting girder 40 in the Z-axis direction, thereby covering between the connecting girder 40 and the deck material 70. Further, the upper surface of the cover material 45 is arranged flush with the upper surface of the girder piece portion 421.
Further, the joist hook 28 has a fixed piece portion 281 and a joist receiving piece portion 282 bent from the lower edge portion of the fixed piece portion 281 and is formed in a substantially L-shaped cross section. The fixing piece 281 of each joist hook 28 is arranged along the girder side piece 422, 423, and is fixed to the girder side piece 422, 423 by a screw 15 which is a fastener.

The reinforcing member 43 is made of a metal material such as steel and extends in the longitudinal direction of the girder body 42. The reinforcing member 43 has a reinforcing upper piece portion 431, a pair of reinforcing side piece portions 432, 433, and a reinforcing lower piece portion 434.
The reinforcing upper piece portion 431 is in contact with each thick portion 425 of the girder upper piece portion 421. The reinforcing side piece 432 has a recessed portion 435 that is recessed with respect to the girder side piece 422, and upper and lower ribs as contact protrusions that protrude toward the girder side piece 422 above and below the recessed portion 435. 436 and 437 are formed. The recessed portion 435 is formed so as to extend in the longitudinal direction of the reinforcing member 43, and forms a space (escape space) in which the threaded portion of the screw 15 fixing the joist hook 28 to the girder side piece portion 422 is arranged. ing. The ribs 436 and 437 are in contact with the girder side piece 422. The rib 437 sandwiches the girder side piece 422 between the fixed piece 281 and the portion below the screwed portion of the joist hook 28. The recessed portion 435 and ribs 436 and 437 described above are formed in the reinforcing side piece portion 433, and the direction is opposite to that of the reinforcing side piece portion 432 in the Z-axis direction. The reinforcing side piece portions 432 and 433 are screwed to the girder side piece portions 422 and 423 at the ends in the longitudinal direction, and at both ends in the present embodiment, by screws 16 which are fasteners. The ribs 436 and 437 of the reinforcing side piece 433 are in contact with the girder side piece 423. The reinforced lower piece portion 434 is formed with leg portions 438 protruding downward from both side edges along the longitudinal direction thereof, and both leg portions 438 abut against the girder lower piece portion 424 with the recess 426 in between. ing.

The second balcony portion 12 has the same configuration as the first balcony portion 11 in that it includes the above-mentioned columns 21 and 22, the end beams 23, 24, a plurality of joists 60, and a plurality of deck materials 70, and has a connecting girder 40. The configuration is different from that of the first balcony portion 11 in that the front girder 50 is provided as a girder material instead. In addition, handrails 26 are installed above the end beams 23 and 24 and above the front girder 50.

The front girder 50 is arranged along the X-axis direction and is fixed to the columns 21 and 22 at both ends thereof. The front girder 50 is formed of an extruded aluminum profile, and has a front girder upper piece portion 51, a pair of front girder side pieces 52, 53, and a front girder lower piece portion 54, as shown in FIG. A hollow portion 55 is formed inside the cage. A joist hook 28 is screwed to the front girder side piece 52, and a plurality of joist 60s are hung on the joist hook 28 and the joist hook 28 screwed to the girder side piece 423 of the connecting girder 40. It is bolted. A plurality of deck members 70 are arranged side by side on the plurality of joists 60 as in the case of the first balcony portion 11 described above.
Further, a rain gutter member 90 is screwed to the upper surface of the end portion of the plurality of joists 60 on the front girder 50 side in the Z-axis direction. The rain gutter member 90 has a bottom piece portion 91 screwed to the joist 60 and a pair of side piece portions 92, 93 raised from the bottom piece portion 91. On the side piece portion 92, a hanging piece portion 72 of the deck material 70 adjacent to the front girder 50 is hung. In the present embodiment, the side piece 722 is in contact with the side piece 92, but if the side piece 92 is arranged in the rain gutter space surrounded by the bottom piece 91 and the side pieces 92, 93, the side piece It may be separated from the portion 722. The upper end of the side piece 93 is covered with a cover piece 511 extending from the front girder upper piece 51 to the connecting girder 40 side. Since there is this rain gutter member 90, the rainwater that enters between the front gutter 50 and the deck material 70 does not fall downward as it is, but is drained by the rain gutter member 90.

A seal member 17 is attached to a side piece portion 732 of the gutter-shaped portion 73 of the deck material 70 adjacent to the connecting girder 40 among the plurality of deck materials 70 in the second balcony portion 12, and the seal member 17 is attached. It is in contact with one part 427. The rainwater that enters between the cover material 45 and the deck material 70 attached to the mounting piece 427 does not fall as it is and is drained by the gutter-shaped portion 73.
It should be noted that the attachment piece portion 427 with which the seal member 17 is in contact and the cover material 45 are sealed.

In the balcony 10 described above, the rain gutter 18 is installed below the joint between the connecting girder 40 and the support column 21 (22), and the rain gutter 19 is installed below the joint between the front girder 50 and the support column 21 (22). (See Fig. 2).
The gutter 18 has both side edges along the longitudinal direction of the connecting gutter 40 so that rainwater drained from the gutter member 80 adjacent to the connecting gutter 40 and the end of the gutter-shaped portion 73 in the longitudinal direction can be received. Arranged across the sides. The rain gutter 18 is further arranged below the joint portion of the end beam 23 (24) and the support column 21 (22).
The gutter 19 is arranged over the entire lower part of the joint of the front gutter 50, the column 21 (22) and the end beam 23 (24) so as to receive the rainwater drained from the longitudinal end of the gutter member 90. ing.

[Effect of this embodiment]
(1) In the present embodiment, the girder main body 42 is reinforced by arranging the reinforcing member 43 extending in the longitudinal direction of the girder main body 42 of the connecting girder 40 in the hollow portion 41, so that the deck material 70 is placed on the girder main body 42. It is possible to obtain rigidity sufficient to withstand the load applied to the connecting girder 40 when the lumber 60 and the like are supported by the double joist hooks 28. Therefore, it is not necessary to increase the vertical dimension of the girder body 42 in the Y-axis direction to increase the rigidity, and the connecting girder 40 can be downsized. Further, since the girder main body 42 can be miniaturized, the weight is also reduced, and the work load of processing and construction of the girder main body 42 before arranging the reinforcing material 43 in the hollow portion 41 can be reduced. Further, even when the upper surfaces of the front girder 50 and the connecting girder 40 are aligned at substantially the same height position, the height position of the lower surface of the connecting girder 40 is equal to or higher than the height position of the lower surface of the front girder 50. The dimensional design can be arranged so that the design of the balcony 10 can be improved.
(2) Since the reinforcing upper piece portion 431 is in contact with the girder upper piece portion 421 and the reinforcing lower piece portion 434 is in contact with the girder lower piece portion 424, the load applied to both joist hooks 28 of the connecting girder 40 Even if the girder body 42 is to be bent downward, the bending of the girder body 42 can be suppressed by the reinforcing upper piece portion 431 and the reinforcing lower piece portion 434.
(3) Since the recessed portion 435 of the reinforcing member 43 forming the escape space of the screw 15 for fixing the joist hook 28 to the girder side piece portion 422, 423 is formed so as to extend in the X-axis direction, the joist hook 28 Even in the state of being screwed, the reinforcing material 43 can be inserted into the hollow portion 41 without interfering with the screw 15, and the workability can be improved.
(4) Since ribs 436 and 437 are formed on the reinforcing side piece portions 432 and 433, the ribs 436 and 437 come into contact with the girder side piece portions 422 and 423 so that the portion excluding the ribs 436 and 437 is on the girder side. The contact area of the reinforcing member 43 with respect to the girder body 42 can be reduced by non-contacting the single portions 422 and 423. Therefore, the frictional resistance force generated when the reinforcing material 43 is inserted into the hollow portion 41 of the girder body 42 can be reduced, and the work load can be reduced.
(5) Since the rib 437 is arranged below the recessed portion 435, when the load of the deck material 70 and the joist 60 is applied to the joist hook 28, the screwed portion of the joist hook 28 and the fixed piece portion 281 The lower part is pressed against the girder side piece 422, 423, but the girder body 42 can be reinforced by the rib 437 coming into contact with the girder side piece 422, 423 at a position below the screwed portion.
(6) After inserting the reinforcing material 43 into the hollow portion 41 from the end portion in the longitudinal direction of the girder body 42, the operator hardly moves the reinforcing material 43 from the position on the end side in the longitudinal direction of the girder body 42. It can be screwed to the end of the girder body 42 in the longitudinal direction, and the work load can be reduced.

[Modification example]
The present invention is not limited to the configuration described in the above embodiments, and modifications within the range in which the object of the present invention can be achieved are included in the present invention.
For example, in the above-described embodiment, the reinforcing side piece portions 432 and 433 are in contact with the girder side piece portions 422 and 423, but they may be separated from each other.
Further, although the reinforcing upper piece portion 431 and the reinforcing lower piece portion 434 are in contact with the girder upper piece portion 421 and the girder lower piece portion 424, they may be arranged at positions separated by a slight gap. Even with such a configuration, when the girder body 42 is slightly bent, the reinforcing upper piece portion 431 and the reinforcing lower piece portion 434 come into contact with the girder upper piece portion 421 and the girder lower piece portion 424, so that the girder main body 42 Can be reinforced by the reinforcing material 43.
In the above embodiment, the joist hook 28 is screwed to the reinforcing member 43, and the reinforcing member 43 is screwed to the end portion of the girder body 42 in the longitudinal direction, but it may be fastened with rivets or the like.
In the above embodiment, the recessed portion 435 is formed in the reinforcing side piece portions 432 and 433, but this configuration may be omitted. In this case, the joist hook 28 may be screwed to the girder side piece 422, 423 and the reinforcing side piece 432, 433 by the screw 15, and the structure corresponding to the joist hook 28 is the girder body 42. It may be integrally formed.
In the above embodiment, ribs 436 and 437 are formed on the reinforcing side pieces 432 and 433, but these configurations may be omitted.
In the above embodiment, the reinforcing material 43 is screwed to both ends of the girder body 42 in the longitudinal direction, but only one end may be screwed, and the reinforcing material 43 may be screwed at an intermediate portion different from both ends. It may have been done. Further, it may be riveted instead of screwed.
In the above embodiment, the leg portion 438 is formed on the reinforcing lower piece portion 434, but when the recess 426 is not formed on the girder lower piece portion 424, the configuration of the leg portion 438 is omitted and the leg portion 438 is reinforced. The main body portion of the single portion 434 may be configured to abut on the lower piece portion 424 of the girder.
In the above embodiment, the connecting girder 40 is arranged along the depth direction of the balcony 10, but may be arranged along the frontage direction. In this case, the deck members 70 of the first and second balconies are arranged on the left and right of the connecting girder 40 in the frontage direction.

1,40 ... Connecting girder (girder material), 10 ... Balcony, 11 ... First balcony part, 12 ... Second balcony part, 15,16 ... Screw, 17,101 ... Seal member, 18,19 ... Rain gutter, 2 , 50 ... Front girder (girder material), 21,22 ... Support, 23,24 ... Wife beam, 25 ... Floor, 26 ... Handrail, 28 ... Joist hanging, 281 ... Fixed piece, 282 ... Joist receiving piece, 3A, 3B, 70 ... Deck material, 41 ... Hollow part, 42 ... Girder body, 421 ... Girder upper piece, 422, 423 ... Girder side piece, 424 ... Girder lower piece, 43 ... Reinforcing material, 431 ... Reinforcement Upper piece, 432,433 ... Reinforced side piece, 434 ... Reinforced lower piece, 435 ... Recessed part, 436, 437 ... Rib (contact protrusion), 60 ... Joist.

Claims (7)

It is provided with a girder body having a hollow portion and a reinforcing material arranged in the hollow portion.
The beam body may girder upper piece has a pair of girder side sections and Ketaka piece, and joist hanger is fastened to the girder side sections,
The reinforcing material has a reinforcing upper piece portion, a pair of reinforcing side pieces, and a reinforcing lower piece portion, and extends in the longitudinal direction of the girder body .
A recess extending in the longitudinal direction is formed on the reinforcing side piece portion.
A connecting girder having the joist hook fixed to the girder side piece portion is arranged in a space surrounded by the recessed portion in the hollow portion . In the concatenated digit according to claim 1,
The reinforcing upper piece portion is in contact with the girder upper piece portion, and is in contact with the girder upper piece portion.
The reinforcing lower piece portion is a connecting girder characterized in that the reinforcing lower piece portion is in contact with the girder lower piece portion. In the concatenated digit according to claim 1 or 2.
A connecting girder characterized in that a contact protrusion projecting toward the girder side piece is formed on the reinforcing side piece. In the concatenated digit according to claim 1 or 2.
The joist hook has a fixed piece portion arranged along the girder side piece portion and a joist receiving piece portion bent from the lower edge portion of the fixed piece portion.
A contact protrusion protruding toward the girder side piece is formed on the reinforcing side piece.
The connecting girder is characterized in that the abutting protrusion is arranged below the recess. In the concatenated digit according to any one of claims 1 to 4.
The reinforcing material is a connecting girder characterized in that it is fastened to an end portion of the girder body in the longitudinal direction. It has a first balcony part and a second balcony part connected to the first balcony part.
The first balcony portion and the second balcony portion are formed by a pair of columns, a girder member attached to the pair of columns, a girder beam attached to the pair of columns, and the girder member and the girder beam. It is provided with a joist arranged on the floor to be formed and a plurality of deck materials arranged side by side on the joist.
A balcony characterized in that the girder material in the first balcony portion is composed of the connecting girder according to any one of claims 1 to 5. It has a first balcony part and a second balcony part connected to the first balcony part.
The first balcony portion and the second balcony portion are formed by a pair of columns, a girder member attached to the pair of columns, a girder beam attached to the pair of columns, and the girder member and the girder beam. It is provided with a joist arranged on the floor to be formed and a plurality of deck materials arranged side by side on the joist.
The girder material in the first balcony portion is composed of a girder main body having a hollow portion and a connecting girder including a reinforcing material arranged in the hollow portion.
The girder body has joist hooks on both side edges along its longitudinal direction.
The reinforcing material extends in the longitudinal direction of the girder body.
A balcony that features that.

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