JPH0711729A - Roof truss structure of mansard roof and construction - Google Patents

Abstract

PURPOSE:To extend a space with sufficient ceiling height as a living room and the like even on the back of a shelter and to shorten erection time. CONSTITUTION:A plural number of buckling type steel frame made mitered beams 4 standing in the ridge direction are provided. Each of the mitered beams 4 is provided with a rising material 4c vertically set on a pole plate 1. Of each of the mitered beams 4, the neighbourhood of a connection part of a steep inclined beam-4b constituting the mitered beam 4 and the rising material 4c is jointed on the pole plate 1 with a mitered beam knee brace 17. Upper end plates of a pair of the mitered beams 4 arranged on both sides of a ridge are bolt jointed to each other respectively with a ridge beam joint plate 28 between them. A ridge beam 5 between the adjacent mitered beams 4, 4 in the ridge direction is bolt jointed on the ridge beam joint plate 28. A pair of the mitered beams 4, 4 arranged on both sides of the ridge joints a ceiling carrying rod 20 on the neighbourhood of a buckling part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mansard roof shed structure and a construction method for a house and other steel-framed buildings.

[0002]

2. Description of the Related Art In recent years, the demand for 3-story houses has increased due to land conditions. It may not be possible to build a house. In addition, in a house with a small floor space, a three-story building tends to have an unbalanced appearance. In such a case, it is possible to use the mansard roof. The mansard roof provides a relatively large space that can be used as a living room behind the hut. Therefore, 3
Even a two-story house can be a well-balanced house with an external appearance such as a two-story house, and the building height can be kept low.

FIG. 13 shows a conventional general wooden mansard roof house. The bent waist beam 81 of the waist bend type has a steeply sloped beam portion 81a whose lower end is joined to the eaves girder 82, and a pair bundle 84 is provided from the waist bend portion to the shed beam 83.

[0004]

However, since the lower end of the steep slope beam 81a of the joint beam 81 directly extends from the eaves girder 82 as described above, considering an appropriate slope of the steep slope beam 81a, Unless the building has a relatively large floor space, it is difficult to obtain a sufficient ceiling height as a living room in the attic space 85, and the floor area cannot be obtained sufficiently. for that reason,
In the case of a house with a normal floor area, it is difficult to obtain a sufficient ceiling height and floor area for the third floor when constructing a three-story house with the back of the hut as the third floor, making full use of the features of the mansard roof. In addition, even in houses and the like, it is desired to provide a large space without pillars, but it is difficult to construct such a large space in the attic. Further, in a three-story building, generally, the erection process is significantly longer than that in a two-story building, and therefore it is required to reduce the time required for erection.

It is an object of the present invention to provide a mansard roof cottage structure and construction method which can obtain a wide space with a sufficient ceiling height as a living room or the like in the back of the cottage and can shorten the erection time. .

[0006]

The mansard roof shed assembly structure of the present invention uses a bent hip steel beam with a rising member installed vertically on the eaves girder at the lower end. . A plurality of these cross beams are installed side by side in the direction of the girder.

[0007] Each of the girder beams may be joined to the eaves girders with a girder beam cane in the vicinity of the connecting portion between the steep beam and the rising member forming the girder beam. Further, the upper ends of a pair of joint beams arranged on both sides of the ridge may be bolted to each other with the ridge beam joint plate sandwiched therebetween, and the ridge beams between the adjacent joint beams in the girder direction may be bolted to the ridge beam joint plate. . A ceiling hanging tree bridge may be joined between the waist bending portions in the pair of joint beams arranged on both sides of the ridge.

The mansard roof joint beam of the present invention is made of steel frame in which a gentle sloped beam, a steep sloped beam, and a rising member are successively provided from the ridge side.

According to the method for constructing a mansard roof cottage structure according to the present invention, a step of installing a plurality of bent hip-shaped steel-framed beams having a rising member at the lower end side by side on an eaves girder and a space between the upper ends of adjacent one-piece beams. And a step of joining with a master beam.
In this case, the cross beam may be divided into parts arranged on both sides of the ridge, and the pair of cross beams may be joined to each other on the building frame or on the ground of the construction site. In addition, the joint beam may be a structure in which both sides of the ridge are integrally formed.

[0010]

According to the structure of the present invention, since the rising member is formed at the lower end of the cross beam and is installed on the eaves girder, the entire roof surface is raised by the height of the rising member. Therefore, it is possible to increase the ceiling height of the attic space, and it is possible to obtain a wide attic space with a ceiling height that can be used as a living room or the like even in a house with a common floor space. Since the rising material is provided on the joint beam, the rising portion can be constructed by installing this joint beam on the eaves girder, and there is no need to assemble the standing material on site in a separate process. Therefore, the time required for assembling the hut group is shortened, and it is possible to construct the entire building in a time that is not much different from the building where the back of the hut is not a living room.

When the above-mentioned cantilever beam cane is joined to the cantilever beam, the supporting strength of the rising member can be ensured, the lateral collapse of the cantilever beam can be prevented, and the overall strength of the shed member is improved. In the case where the brace is connected to the joint beam, the force in the column row direction due to the brace tension is transmitted to the eaves girder by the joint beam cane to prevent the joint beam from falling sideways. In this way, since the supporting strength of the cross beam is secured by the cross beam cane, a large attic space without columns can be realized. When the ceiling hanging beam receiver is provided on the joint beam as described above, the hanging tree receiver also functions as a connecting beam of the joint beam, and the strength is further improved. When the upper ends of the pair of joint beams arranged on both sides of the ridge are bolted to each other with the ridge beam joining plate sandwiched between them, and the ridge beam is bolted to this, the members can be easily joined to each other. In addition, since the joint beam is divided into short parts on both sides of the building, transportation from the factory to the site becomes easy.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. The eaves girder 1 and the body difference 2 are joined to each other via a joint box 3, and a column downstairs (not shown) is provided below the joint box 3. The eaves girder 1 and the body difference 2 are both made of channel steel or H-section steel. The shed assembly of this embodiment is a mansard-shaped shed assembly having a half gable portion A, and a plurality of waist-folded joint beams 4 arranged in the girder row direction and the adjacent joint beams 4, 4 are joined to each other. Mainly composed of the master beam 5. The gable surface is provided with a plurality of squid columns 6, a half gable gable beam horizontal member 7, a half gable gable beam diagonal member 8 and an end purlin 50.

As shown in FIG. 5, each middle beam 4 is formed by joining a gentle sloped beam 4a, a steep sloped beam 4b and a rising member 4c in this order from the ridge side. The slopes of the gently sloping beam 4a and the steeply sloping beam 4b are, for example, 4.5 inches and 12.
There is a 5 inch slope. Each beam 4a, 4b and rising member 4
c is made of steel such as H-section steel, and the joining between these members is performed by welding with the joining plates 9 and 10 interposed. End plates 11 and 12 are welded to the upper and lower ends of the cross beam 4.

Brace joint plates 13 are welded to both side surfaces of the web at the upper and lower ends of the gently sloping beam 4a, and a lumber receiving joint plate 14 is welded to the lower surface of the lower flange near the lower end. On the steep beam 4b, brace joint plates 13 (FIG. 3) are welded to both sides of the web at the upper and lower ends, and cane joint plates 15 (FIGS. 2 and 6) are welded to both sides of the web at the lower end. . Each of the plates 13 to 15 has a bolt insertion hole. Further, at the upper and lower ends of each of the beams 4a, 4b, a purlin receiving piece 16 made of a piece of angle material or the like is welded to the upper surface of the upper flange.

In FIG. 1, a pair of joint beams 4 and 4 on both sides of the ridge are joined to each other by a shaped steel ceiling hanging tree 20 whose both ends are joined to the hanging tree receiving joint plate 14 (see FIG. 4), a ceiling hanging tree bundle 21 is erected at the center thereof.
The half gable girder beam diagonal member 8 is formed by joining a steep slope beam 8a and a rising member 8b. Each of the cross beams 4, 8 is a cross beam cane 1
It is joined to the eaves girder 1 at 7,18.

Except for the half gable portion A, a ridge purlin 22 and other purlins 23 are bridged between the respective connecting beams 4 and 8 and joined to the purlin receiving piece 16 (FIG. 5). Each purlin 23 is a light-section steel double purlin. In the half gable portion A, a connecting beam 24 and a corner joint 25 are provided. Further, two braces 26 are provided so as to intersect with each other between the adjacent joint beams 4, 4 and between 4, 8. The brace 26 has a turnbuckle in the middle and can be tightened, and the battledore portions at both ends have the brace joining plate 1
3 (FIG. 3). In addition, in FIG. 1, a symbol M indicates a module core.

FIG. 2 is an enlarged view showing the joint structure of the cantilever beam cane 17. The end plate 12 at the lower end of the beam 4 has a bolt 36
Join it on the upper flange of the eaves girder 1. A bolt insertion hole (not shown) is previously machined in the end plate 12 and the upper flange of the eaves girder 1 at the factory. The girder beam cane 17 is made of C-shaped steel or the like and has a lower end bolted to a cane joint plate 27 welded to the upper surface of the eaves girder 1 and an upper end bolted to a cane joint plate 15 of the joint beam 4. It

FIG. 3 and FIG. 7 show a joint structure of the joint beam 4 and the ridge beam 5. The pair of joint beams 4 and 4 on both sides of the ridge are joined together by bolts 29 and nuts (not shown) at the upper end plates 11, 11 with the ridge-beam joining plate 28 interposed therebetween. A bolt insertion hole (not shown) is previously processed in the end plate 11. As shown in FIG. 8, the master beam joint plate 28 includes four inter-beam joint holes 30 in the center, two master beam joint holes 31 on both sides, two joint beam joint holes 53 on both sides, and a lower one.
This is provided with individual hanging tree bundle joining holes 32. It should be noted that instead of using the bridge-joining plate 28, a plate similar to this plate 28 is attached to one of the connecting beams 4 to the end plate 11
Alternatively, the end plates may be directly bolted to each other.
The master beam 5 is formed by welding two lip channel steels 5a, 5a back to back through a liner (not shown), and inserting the beam connection plate 28 between the lip channel steels 5a, 5a. It joins with the bolt 33 and the nut (not shown).
The bolt 33 is inserted through a bolt insertion hole (not shown) provided in advance in each of the lip channel steels 5 a and 5 a and the bolt insertion hole 31 of the bridge-joining plate 28. Hanging tree bundle 21
Is joined at its upper end to the bolt insertion hole 32 of the bridge joint plate 28 with a bolt 34. At the upper end of the cross beam 4, a notch 35 for joining work is preliminarily machined in the upper flange.

FIG. 11 is a partial sectional view of a mansard roof using this roof structure. Beam 4 of each gradient
a, 4b, roof panels 38, 3 on purlins 22, 23
9 is placed and the rafters are attached to the purlins 22 and 23 by appropriate metal fittings (not shown). The ceiling panel 40 is attached to the ceiling hanging tree bridge 20 with a ceiling hanging hardware 41. The floor panel 42 is laid on the floor beam 52. A vertical wall 43 and an inclined wall 44 are provided between the floor panel 42 and the ceiling panel 40. An attic space 45 serving as a living room is formed between the floor panel 42 and the ceiling panel 40. The roof in the figure is 3
The roof of the one-story house, and the outer wall panel 47 on the second floor is located directly below the eaves girder 1. Ceiling panel 48 of room 46 on the second floor
Is installed on the lower surface of the floor beam 52.

Next, a method for constructing this shed assembly will be described. ． First, as shown in FIG.
The joint beams 4 and 4 on both sides are bolted to each other with 8 in between. ． A ceiling hanging tree bridge 20 (FIG. 10) is attached to the cross beam 4.
And the ceiling hanging tree bundle 21 is bolted. These joining operations are performed on the ground when a sufficient location for installing a heavy machine such as a crane is available on the site, and on the floor panel 42 (FIG. 11) when the location is not available. In any case, it is desirable that the floor panel 42 be laid before the installation of the cross beam 4.

[0021]. The cross beam 4 thus assembled is shown in FIG.
It is hung with the hanging rope 51 of the crane like the
Bolt on top. After this, the cantilever beam cane 17 is also joined between the gaslar beam 4 and the eaves girder 1. ． After fixing each beam 4 on the eaves girder 1 in this way, the mooring column 6 of FIG. 1 is erected and a mooring panel (not shown) is attached to the mooring column 6. ． After that, the half gable gable beam diagonal member 8 and the half gable gable beam horizontal member 7 are attached to the squid panel and the sill column 6. ． Each ridge beam 5 is connected to the ridge beam connection plate 28 of the joint beam 4.
Install on. ． Next, the connecting beam 24 is attached to the half gable girder horizontal member 7 and the ridge beam joining plate 28. ． The main purlin 22 is attached, and the corner joints 25 are attached to the horizontal horizontal beam 7 of the joint beam and the main purlin 22. ． The end purlin 50, the purlin 23, and the brace 26 are attached. This completes the hut structure.

According to this roof structure, since the rising member 4c is formed at the lower end of the joint beam 4 and installed on the eaves girder 1, the entire roof surface is raised by the height of the rising member 1. Become. Therefore, the ceiling height of the attic space 45 (FIG. 11) can be increased, and it is possible to obtain a large attic space 45 having a ceiling height that can be used as a living room or the like even in a house with a common floor space. it can. Further, in the case of a three-story house, it is possible to suppress the height of the entire building while taking the attic space 45 large as described above. For example, when the slopes of the cross beam 4 are set to 12.5 and 4.5 and the module interval P is set to 910 mm as described above, the average ceiling height is 2100 mm in a span of 7 P and 240 in horizontal direction.
It is possible to secure 0 mm and the total height of the building is 10 m or less. Further, by setting the inclination of the cross beam 4 to 12.5 inches, it is possible to advantageously cope with the diagonal line limitation. That is, the road diagonal line, the adjacent ground diagonal line, and the north side diagonal line often have a slope of 1.25, but this diagonal line limitation can be dealt with. Further, the provision of the half gable portion A is also advantageous for the diagonal line limitation.

As described above, the rising portion is provided in the roof frame, but since the rising member 4c is previously provided integrally with the joint beam 4,
By installing the cross beam 4 on the eaves girder 1, a rising portion can be constructed, and it is not necessary to assemble the rising material 4c on site separately from the rising beam 4. Therefore, the time required for assembling the shed is reduced. Further, since the shed assembly can be easily assembled in this way, it is possible to construct the entire building in a time which is not much different from that of a two-story house in which the attic is not used as a living room.

Since the cantilever beam cane 17 is joined to both sides of the joint beam 4, the supporting strength of the rising member 4c can be secured, and the strength of the entire shed can be improved. That is, the force in the girder direction due to the tension of the brace 26 causes
Will be transmitted to the eaves girder 1 and the lateral collapse of the beam 4 will be prevented. Further, the ceiling hanging beam receiver 20 is provided on the joint beam 4, but the hanging tree receiver 20 also functions as a connecting beam of the joint beam 4, and the strength is further improved. Therefore, it is not necessary to support the joint beam 4 by the pillar at the intermediate portion while providing the rising member 4 to increase the height of the shed group, and a large attic space 45 without the pillar can be formed. Gassho beams 4, 4 on both sides of the building
Is bolted with the ridge beam joining plate 28 interposed therebetween, and the ridge beam 5 and the hanging tree receiving bundle 21 are bolted thereto.
Therefore, the members 5 and 21 are easily joined. Further, since the cross beams 4 are divided from each other on both sides of the ridge, the length of one cross beam 4 is short enough to avoid truck transportation, and can be easily transported from the factory to the site.

FIG. 12 shows another embodiment. This example is an example applied to a mansard cottage without a half gabled part. In this example, the end portion is provided with the end portion beam 44 made of shaped steel, which is slightly thinner than the middle portion contact beam 4, and is supported by the sill column 45. The end-part beam 44 is formed by welding the gentle-gradient beam 44a, the steep-gradient beam 44b, and the rising member 44c in advance at the factory in the same manner as the intermediate-part joint beam 4. The other structure is the same as that of the above embodiment.

[0026]

EFFECTS OF THE INVENTION The mansard roof shed assembly structure and construction method of the present invention uses a girder beam having a rising member at the lower end, so that a space with a sufficient ceiling height can be obtained in the back of the shed as a living room. Also, the erection time is short.

When the cantilever beam cane is joined to the cantilever beam, it is possible to secure the support strength of the rising material portion, and therefore it is easy to obtain a large attic space without pillars. When a ceiling hanging wooden bridge is provided on the roof beam, this wooden bridge also acts as a connecting beam for the roof beam, further improving the strength.In addition, the upper ends of the pair of roof beams arranged on both sides of the ridge are When bolt-joining the ridge beam joining plate and bolting the ridge beam to this, joining of the respective members is easy. Moreover, since the joint beam is divided into short parts on both sides of the building, it is easy to transport from the factory to the site.

[Brief description of drawings]

FIG. 1 is a partial exploded perspective view of a shed assembly according to an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of an eaves portion of FIG.

FIG. 3 is an enlarged perspective view of the ridge portion of FIG.

FIG. 4 is a partially omitted front view showing a joint beam and a floor beam.

FIG. 5 is a front view of a cross beam.

FIG. 6 (A) is an enlarged cross-sectional view of a joint portion between a cross beam and an eaves girder, and FIG. 6 (B) is a side view thereof.

FIG. 7 (A) is a cross-sectional view taken along the ridge direction at the joint between the joint beam and the ridge beam, (B) is a cross-sectional view obtained by cutting the same portion parallel to the end face, and (B) is the same portion. FIG.

FIG. 8 is an enlarged front view of a bridge beam joining plate.

FIG. 9 is an explanatory diagram showing a method of assembling a pair of joint beams.

FIG. 10 is a perspective view showing a building process of the shed assembly.

FIG. 11 is a cross-sectional view of a mansard roof constructed by the same house assembly.

FIG. 12 is a perspective view of another embodiment of the present invention.

FIG. 13 is a partial front view of a conventional example.

[Explanation of symbols]

1 ... Eaves girder, 2 ... Body difference, 4 ... Joint beam, 4a ... Gradient beam, 4
b ... steeply sloped beam, 4c ... standing material, 5 ... ridge beam, 17 ... girder beam cane, 20 ... ceiling hanging tree bridge, 21 ... ceiling hanging tree bundle,
28 ... Master beam connection plate

Claims (7)

[Claims] 1. A mansard roof shed structure in which a plurality of bent hip-shaped joint beams made of steel frames are arranged in the girder row direction, and each joint beam has a rising member vertically installed on the eaves girder at the lower end. 2. The method according to claim 1, wherein the vicinity of the connection portion between the steep beam and the rising member forming the joint beam is joined to the eaves girder with the joint beam cane.
The mansard roof structure as described. 3. The upper ends of a pair of joint beams arranged on both sides of the ridge are bolted to each other with the ridge beam joint plate sandwiched therebetween, and the ridge beams between the adjacent joint beams in the column direction are bolted to the ridge beam joint plate. The house structure with a mansard roof according to claim 1. 4. The mansard roof shed structure according to claim 1, wherein a ceiling hanging tree bridge is joined between the waist bending portions of a pair of joint beams arranged on both sides of the ridge. 5. A steel-framed mansard roof girder beam in which a gentle sloped beam, a steep sloped beam, and rising members are successively provided from the ridge side. 6. A mansard roof including a step of arranging a plurality of bent hip-shaped steel-framed beams having a rising member at a lower end side by side on an eaves girder, and a step of joining the upper ends of the adjacent beam-shaped joint beams with a master beam. How to build a hut. 7. The cross beam according to claim 6, wherein the cross beam is divided into parts arranged on both sides of the ridge, and the pair of cross beams are joined to each other on a building frame or on the ground of a construction site. How to build a house with a mansard roof.