JPH0668201B2 - Roof structure and roof construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a roof structure having a curved surface shape applied to a gymnasium, etc., and a method for constructing such a roof by roofing a large number of roof plates. It is about.

[Conventional technology]

As a roof structure formed by roofing a large number of roof plates, a structure as shown in FIGS. 16 to 18 is conventionally known.

Among them, the roof plate (1) constituting the roof structure shown in FIG. 16 is formed by bending the front edge portion of the face plate portion (2) forming the roof surface downward and the rear edge portion upward. The eaves-side joint (3) and the ridge-side joint (4) are formed, and the ends of the joints (3) and (4) are substantially parallel to the face plate (2). The eaves side abutting portion (3F) and the ridge side supporting portion (4F) are formed by being bent forward and backward, respectively.

In order to form a roof by vertically roofing such a roof plate (1), a ridge-side joint portion of the roof plate (1) located on the eaves side is formed on a foundation structure including rafters and field boards (not shown). On the supporting surface (4F) of (4), while supporting the back surface part of the eaves side joint part (3) of the roof plate (1) located on the ridge side, the eaves side joint part (3) is brought into contact. The section (3F) is polymerized so that it sits on the upper surface of the base of the ridge-side joint section (4), and these are fixed using a fixture such as a nail. Performing such work from the eaves side to the ridge side, or from the ridge side to the eaves side, a plurality of roof boards (1)
The roof structure as shown in the drawing is formed by continuing the steps.

In this roof structure, the roof-side joints (3) and the ridge-side joints (4) of the roof plates (1) adjacent to each other in the eaves direction are roofed so as to come into contact with each other. 17), a relative allowance is provided for the length of), and as shown in FIG. 17, a gap (5) is provided between the joints (3) and (4).

Further, in the roof structure shown in FIG. 18, the roof plate (6) is folded back to the back side at the eaves side end of the face plate portion (7) and to the front side at the ridge side end (the eaves side joint ( 8) and the ridge side joint part (9) are formed, and the roof boards (6) adjacent to each other in the eaves ridge direction are folded back to the eaves side joint part (8) as shown in the figure. The ridge-side joints (9) of other adjacent roofing plates (6) are connected by being polymerized so as to be meshed with each other.

Although not shown, each of the roof plates (1) and (6) also has a certain width in the purlin direction (direction perpendicular to the drawing), and the side connecting portions formed on both side edge portions of the face plate portion are connected to each other. A roof having a required size is formed in the purlin direction by connecting via a suspender and a cover, etc., if necessary.

[Problems to be Solved by the Invention]

By the way, if an attempt is made to form such a roof structure as a dome-shaped roof having a curved surface, which is often used as a roof of a large building such as a gymnasium, many problems occur in terms of weather resistance and construction workability.

That is, when a large number of roofing boards of a certain size are to be roofed to form a roof, as a matter of course, the larger the roof, the number of roofing boards and the joint portion where the roofing boards connect in the eaves direction. However, in the above-mentioned conventional roof structure, the abutting or engaging portion may have a structure in which the surfaces are simply overlapped with each other. The phenomenon makes it easy to leak rain. Further, since the number of steps and irregularities generated at the abutting or engaging portions also increases, there is a problem that an orderly appearance cannot be obtained.

In order to solve this problem, the roof should be made as large as possible and with a long roof plate, but when roofing a curved roof with such a long material However, the larger the size, the more advanced technology is required for the watertightness / waterproofing of the seam, but in recent years, the number of construction engineers who can perform skillful treatment has decreased, and as a result, rain leaks are more likely to occur. There is a risk that

On the other hand, in Japan, where the houses are built up, there are many roads that are narrow due to bad road conditions, so there is also a social limitation that it is difficult to transport long materials by large trucks.

The present invention has been made in view of such conventional problems, and an object thereof is to provide a roof structure which is excellent in waterproofness and weather resistance and at the same time can form a curved roof having a beautiful appearance.

The present invention also provides a method for constructing a roof that allows such a roof structure to be easily formed even by a skilled engineer.

[Means for Solving the Problems]

In order to achieve the above object, the roof structure according to the present invention has the following roof structure. That is, both side edges of the face plate forming the roof surface are provided with side connecting portions with other adjacent roof plates, have an outer shape corresponding to the roof top shape, and have eave side ends at both ends thereof. A first roofing plate that forms a part and side connecting parts on both side edges of the face plate part are also provided, and the face plate part rises from the sloping surface part and the ridge side end part that rises from the middle to the ridge side at its upper end part. A second roof plate formed by supporting end faces each having a supporting face located at substantially the same height as the roof face and formed between the side connecting portions on both sides, and both ends of the first roof plate are provided. The roof structure is such that a plurality of second roof plates are connected in the direction of the eaves.

Furthermore, each roof plate connected in the direction of the eaves is overlapped with the eaves side end of the roof plate located on the ridge side in the vicinity of the slope start portion of the sloped surface part of another roof plate located on the eaves side, and The back side of the face plate of the ridge side roof plate is supported by the supporting surface of the eaves side roof plate, and between the inclined surface part and the supporting end face of the eaves side roof plate and the face plate part of the ridge side roof plate that covers it from above. The roof structure defines the space.

Further, in the present invention as a method of constructing a roof as described above, first, a first roof plate and a second roof plate similar to those described above are prepared, and then a first roof plate or a second roof plate located on the ridge side is prepared. The eaves side end of the roof plate of No. 2 is overlapped with the vicinity of the slope start portion of the sloped surface portion of the second roof plate located on the eaves side, and the back surface of the roof plate located on the ridge side is located on the eaves side. Supported by the supporting surface of the roof plate, and by overlapping the face plate portion of the roof plate located on the ridge side with the inclined surface portion of the roof plate located on the eaves side, a plurality of roof plates are provided in the eaves ridge direction. Try to go down.

[Work]

In the roof structure according to the present invention, the roof side ends of the other roof plates located on the ridge side are aligned with the inclination start position of the inclined surface portion, and the back surface of the roof is supported by the supporting surface. Since the board is roofed, a space is defined between the inclined surface portion and the eaves side end of another roof board that is continuously provided on the ridge side, and the gap is created between the roof boards due to the capillary phenomenon. This space ensures that the ingress of rainwater is prevented. Therefore, even if a long roof plate is not prepared and a large dome-shaped roof is formed, excellent weather resistance that does not cause rain leakage or dew condensation is exhibited.

In addition, support for the roof plates connected in the direction of the eaves is carried out on the support surface raised from the ridge side end of the face plate part, and the eaves side end of the roof plate is at the part where the slope descending to the ridge begins. Since the roof plate on the eaves side is overlapped with the face plate portion, the respective roof plates form the same surface in the eaves ridge direction, that is, the unevenness or step of the abutting or engaging portion does not occur unlike the conventional example.

On the other hand, in roofing such a roof, in the roof construction method according to the present invention, the connection of the roof plates in the eaves direction is as described above, that is, the roof plate located on the ridge side (at the roof top is The eaves-side end of the first roof plate, and other parts of the second roof plate) is overlapped with the vicinity of the slope start portion of the slope surface portion of the second roof plate that descends toward the ridge. Support the back of the face plate of the roof plate on the supporting surface of the roof plate located on the eave side.The face plate part of the roof plate located on the ridge side is overlapped with the inclined surface part of the roof plate located on the eave side. Basically, when roofing the roof, there is basically no need to perform special processing or engaging operations on the roof plate, and it is not necessary to make a long roof plate as a measure against rain leaks. Even with a dome-shaped roof, A roof excellent in weather resistance and appearance can be easily and accurately formed.

〔Example〕

Hereinafter, a roof structure and a method for constructing a roof according to the present invention will be described with reference to the drawings with reference to an embodiment applied to a so-called large-scaled building. With reference to the drawings of each embodiment,
The parts corresponding to each other are designated by the same reference numerals.

1 and 2 show a roof structure according to an embodiment of the present invention, and FIGS. 3 and 4 show a roof plate used for the roof structure.

In FIG. 1, reference numeral (24) is a main building material made of C-shaped channel steel which forms the base portion of the roof, and is provided in large numbers at substantially equal intervals along the axial direction of the roof curved surface. Also (25)
Is a lower base material laid all over the main building material,
(27) is a metal rafter. A large number of the rafters (27) are arranged on the main building material (24) so as to be orthogonal to the main building material (24) and at predetermined intervals in the main building direction.

The metal rafter (27) is smoothly bent so as to form an arc shape when viewed from the front as shown in Fig. 1, and is smoothly bent according to the outer shape of the roof, on which the first and second roofs are formed. Board (10),
(11) is thatched.

The first roof plate (10) located at the top of the roof has an arc-shaped face plate (1) corresponding to the roof shape as shown in FIG.
Mainly of 2), both ends thereof are eaves side ends (14) to which the second roof plate (11) is connected. Further, side connection parts (13) for connecting other roof plates (10) in the purlin direction are erected parallel to each other at both ends of the face plate part (12) in the purlin direction. .

Next, for the second roof plate (11), this roof plate (11)
As shown in FIG. 4, is a flat plate-like face plate portion (12) having the same width in the purlin direction as the first roof plate (10), and the side which rises parallel to each other at both side edge portions thereof. One-way connection (1
3) and are formed in the same front cross-sectional shape as the first roof plate (10).

The face plate portion (12) starting from the eaves side end portion (14) of the second roof plate (11) is inclined downward at a predetermined angle from the middle part toward the ridge side as shown in FIG. A surface portion (16) is formed. The inclined surface portion (16) continues from the inclined end portion to the ridge side end portion (15) via the bottom surface portion (17) which is parallel to the face plate portion (12) again. Also, the ridge side end (15) is
The supporting end face (18) rising at the rear end of the bottom face part (17) is parallel to and substantially the same as the face plate part (12) with the upper edge of the supporting end face (18) bent toward the ridge. And a supporting surface (19) formed so as to be located at a height. Although not shown, the support surface (19) may be formed so as to be bent toward the eaves.

In addition, in the second roof plate (11), the side connecting portions (13) on both sides in this case are the inclined surface portion (16) and the bottom surface portion (17).
It is formed so as to have the same rising height from the eaves side to the ridge side from beginning to end. However, since the detailed configuration of the side connecting portion (13) is not an essential part of the present invention, another embodiment is performed. This will be described later as an example.

The first roof plate (10) and the second roof plate (11) are the first
As shown in the figure, the first roof plate (1
0) is located, and the required number of second
The roof is constructed in the form of a thatched roof that connects the roof plates (11).

FIG. 5 shows the details of the connecting portion when the first roof plate (10) and the second roof plate (11) are vertically roofed in this way. The second roof plate (11) is shown in FIG. Is a bent portion (point P) from the face plate portion (12) to the inclined surface portion (16) when the eaves side connecting portion (14) of the other roof plate (10) or (11) connected to the ridge side is a bent portion (point P) or this. The roof plate (10) or (11) positioned so as to overlap the ridge side slightly more than the ridge side at this time
Is supported on the support surface (19) of the eaves side roof plate (11) at the back surface portion slightly on the ridge side in addition to the point P. At this time, the side connecting parts (13) rising up on both sides of the face plate part (12) are also inclined along the inclined surface part (16) at the part where the side plate part (12) transitions to the inclined surface part (16). Therefore, the roof side (10) or (11) of the other side connected to the ridge can be easily overlapped with the eave side end of the side connecting part (13).

Further, the roof boards (10) and (11) are vertically laid in the same manner in the above-mentioned manner in the eaves building direction, and adjacent to each other in the purlin direction as illustrated in FIG. Via the suspension member (40) and the cover cap member (30) arranged at equal intervals so as to be located between the side connecting portions (13) and (13) of the roof plate (10) or (11). They are interconnected. In the example of FIG. 14, the suspension member (40) is formed as a long material by extruding aluminum or the like, and the cover cap member (3 having an inverted U-shaped cross-section that fits from above is used.
Between the roof panels (10), (11) and the side connection part (1
By sandwiching 3), the function of connecting and fixing is demonstrated.

Next, the operation or effect of the roof structure that is vertically laid as described above will be explained. Each roof plate (10), (11)
Is a roof plate (1
1) inclined surface part (16), bottom surface part (17), and supporting end part (1)
8) and the face plate part (1) of the ridge side roof plate (10) or (11) that is connected so as to cover it from above.
A space (20) is defined between it and 2). Further, at this time, the side surface portion of the space (20) is partitioned by the side connecting portions (13) on both sides.

The space (20) is a supporting surface which is a substantially supporting and joining part of the eaves side end (14) of the ridge side roof plate (10) or (11) and each roof plate (10), (11). Since it forms a large space with (19), rainwater that pours onto the roof at the time of rain temporarily enters the space (20) through the gap between the eaves side end (14) and face plate (12). However, there is no possibility that it will accumulate in the space (20) or reach the support surface (19), so that the infiltration of rainwater to the back side of the roof is reliably prevented.

In addition, the ridge-side roof plates (10) and (11) have eave-side end parts (14) whose face plate part (12) is slightly behind the end part (14) of the eave-side roof plate (11). Since it is supported by the support surface (19) located at substantially the same height as the face plate portion (12), it is the inclination start point of the inclined surface portion (16) and the eaves side end portion of the face plate portion (12). (14)
There is no unevenness at the contact point (point P) with the inclined surface part (16), that is, a smooth and orderly roof surface is formed in the eaves direction as shown in FIG.

Furthermore, this waterproof roof structure does not require the use of long shingles, that is, each shingle (10) and (11)
Since it can be downsized, it is easy to handle and work in a narrow space, and there are no problems in transportation.

On the other hand, as described above, in the roof construction method using the roof boards (10) and (11), when roofing the roof, the roof boards (10) and (11) are basically special Therefore, it is possible to easily and accurately form a roof excellent in weather resistance and appearance as described above even if it is a large-scale dome-shaped roof without performing any processing or engaging operation. Further, in the roof structure formed in this way, it is not necessary to prepare a long roof plate as described above, so that even a skilled engineer can easily roof a large dome-shaped roof.

Next, a partially different embodiment of the roof structure will be described.

FIG. 6 shows an embodiment in which the length of the inclined surface portion (16) of the second roof plate (11) in the eaves ridge direction is increased. If the dimension from the point P to the ridge side end (15) is the same as that of FIG. 5, the inclined surface portion (16) occupying the portion from the point P to the ridge side as in this embodiment is the same. The larger the dimension, the less steep the angle of inclination. If the slope is made gentle like this, the eaves side end (14) may be caused when the roof is roofed due to dimensional errors.
Even if the position of is slightly shifted in the direction of the eaves, the change in height of the eaves side end (14) due to it can be suppressed to a small extent, which is advantageous in adjusting the appearance.

Also, as shown in FIG. 7, the first or second roof plate (1
When the eaves-side contact surface (21) forming the inclined surface having substantially the same slope as the inclined surface portion (16) is folded back at the eaves-side end portions (14) of (0) and (11), the inclined surface portion (16) at the point P (16) is formed. ) To eaves end (14)
Since the seating and the adhesion are improved, the weather resistance and the appearance finish are further improved. Further, in this example, as shown in the figure, a watertight material (22) made of high-density sponge or the like is interposed behind the eave-side contact surface (21). This watertight material (22) is a face plate part (1) of the ridge side roof plate (10) or (11).
While supporting 2) on the bottom part (17) as an auxiliary,
When rainwater enters from the front eaves side end (14), it acts as a water drop and water vapor, blocking the space (20) in the middle so that it does not go around to the back side of the support surface (19). . That is, the watertight material (22) together with the eaves side contact surface (21) further improves the external appearance and weather resistance.

8 to 12 show another embodiment relating to the front shape of the roof plate (10) or (11).

8 to 10 show different side connecting parts (13) from each other. FIG. 8 shows a shape in which the upper end of the side connecting part (13) is folded back inward, and FIGS. 9 and 10 show intermediate parts. The shape of the side connecting portion (13) is freely set according to the hanger and the cover cap member (see FIG. 14) connecting these as seen in these. be able to.

On the other hand, in each of the above embodiments, the face plate portion (12) is an example of a flat one, the present invention is not limited to such a flat shape, for example, As shown in Fig. 11, the face plate part (12) when viewed from the front is a folded roof plate (10), (11) having a square wavy cross section or a round wavy cross section as shown in Fig. 12. It is possible to configure and by applying these roof plate shapes,
The overall rigidity of the roof plates (10), (11) can be increased, and a more unique appearance can be imparted. Incidentally, in the case of such a shape, the corrugated shape at both ends of the face plate portion (12) is used as it is as the side connecting portion (13), and as shown in FIG. ), (11) may be connected by polymerizing the corrugated connecting portions (13).

Further, the roof structure of the above embodiment is an example in which the roof plate (10) or (11) is made of only a metal plate material, but instead of this, a lining structure as shown in FIG. 13 is used. The roof plate (11) may be used. Explaining this, the face plate portion (12) of the roof plate (11) has a plate-shaped upper base material (23) made of wood wool plate, foamed resin material, or plastic plate attached to the back side thereof. ing.
In this case, the upper base material (23) is substantially in the first half of the face plate portion (12) so as not to interfere with the inclined surface portion (16) and the bottom surface portion (17) of the other roof plate (11) connected to the eaves side. It is attached to the area excluding the parts. Needless to say, although not shown, it is preferable to use the upper roofing material (23) attached to the back surface of the top first roofing plate (10).

In this way, by applying an upper base material (23) made of wood wool or foamed resin to the back surface of the face plate portion (12) and roofing the roof, the upper base material ( 2
By 3), noise such as rain noise is effectively blocked right behind the roof plates (10) and (11), thus improving quietness indoors. Further, since the heat insulating function is generated by sticking the upper base material (23), the air conditioning function can be efficiently operated, and the upper base material (23) itself can be maintained in a good state, and The dew condensation phenomenon on the back surface of the metal roof plates (10) and (11) can be reliably prevented.

Next, using a roof plate (11) as shown in Fig. 13,
An embodiment will be described in which an air layer is provided between the roof surface and the basic structure of the roof.

In this embodiment, as shown in FIG. 14, the upper base material (2) provided so as to come into contact with the back surface of the roof plate (10) or (11).
An air layer (26) is provided between 3) and a lower base material (25) which is a flat plate laid on one surface on a support material such as a building side main material (24).

The lower base material (25) laid on the main building material (24) is
It is made of a wooden wool board similar to the upper base material (23) or a hard foam gun fat material, etc., and is fixed to the purlin material (24) via fasteners such as bolts and nuts not shown, and the roof foundation. Make up the surface.

An upper base material (23) and a roof plate (10) are provided on the lower base material (25) with a space corresponding to the air layer (26).
In order to support (11), a long metal rafter (27) is arranged on the upper surface of the lower base material (25) along a direction perpendicular to the main material (24), that is, the eaves direction. It This rafter (27)
Are provided at a number of equally spaced pitches corresponding to the mounting width of the roof plate (11), and the above-mentioned suspension member (40) is fixed to the web portion (27A) at the upper end thereof. As shown in the figure, the cross section of the metal rafter (27) has a flange portion (27B) that seats on the lower base material (25) at both lower ends and the web portion (2
7A) and a shoulder portion (27C) provided in the middle of the stepped hat shape, and the shoulder portions (27) of the rafters (27) adjacent to each other.
The upper base material (23) attached to the roof plates (10) and (11) is held between C) and (27C) in such a manner that it is fitted therein.

Thus, a gap corresponding to the height of the shoulder portion (27C), that is, an air layer (26) is formed between the lower base material (25) and the upper base material (23). The rafter (27) is fixed on the lower base material (25) by tightening the flange portion (27B) via a fixture (28) such as a bolt or a screw.

As shown in FIG. 15, a rafter (27) having a simple hat-shaped cross section is used, and the upper base material (23) is placed on the rafter (27).
The roof may be roofed in the manner of mounting.

In this way, the air layer (26) is formed between the lower base material (25) and the roof plates (10) and (11) that form the basic structure of the roof.
When the sound is formed, external noise such as rain is generated in the air layer (26)
Upper base material (23) above and below and lower base material (2)
Since it is attenuated at 5), the ingress of noise to the indoor side can be efficiently suppressed, thus the quietness of the indoor is greatly improved, and the air layer (26) exhibits a further excellent heat insulating function. .

The roof plate (11) of each of the above-mentioned examples is a standard length roof plate whose width and length are finished to a predetermined size in advance. In the case of this standard length roof plate, a material such as a rolled steel plate is applied. Compared to the case where the roof plate is formed by on-site processing using a roll press machine etc., it is possible to carry in as much as necessary on the site, so there is no waste and the handling itself is easy In addition to the above advantages, the dimensional accuracy is higher than that obtained by on-site processing, so that construction work can be facilitated.

〔The invention's effect〕

As described above, according to the roof structure of the present invention,
Since the eaves side end of the other roof plate located on the ridge side is aligned with the inclination start position of the inclined surface part, and the back surface of the roof plate is supported by the supporting surface, the roof plates are roofed. , A space is defined between the inclined surface portion and the eaves side end portion of another roof plate connected to the ridge side, and rainwater tries to enter the indoor side through the gap between the roof plates due to a capillary phenomenon. Is reliably blocked by this space. Therefore, even when a large dome-shaped roof is formed, excellent weather resistance that does not cause rain leakage or dew condensation is exhibited.

Further, according to the roof structure of the present invention, the support between the roof plates continuously provided in the eaves ridge direction is carried out by the support surface raised from the ridge side end of the face plate, and the eaves side end of the roof plate is By overlapping with the part where the slope of the roof side of the eaves begins to slope, each roof plate forms the same plane in the direction of the eaves, so there is no unevenness or steps in the abutting or engaging parts, orderly The effect of realizing a roof with an external appearance is also obtained.

Further, in the roof structure of the present invention in which the upper base material made of wood wool or foamed resin is attached to the back surface of the face plate portion of the roof plate, noise such as rain sounds is generated on the back surface side of the roof plate. Can effectively shut off and significantly improve the quietness indoors. Moreover, since the heat insulating function is generated by sticking the upper base material, the air conditioning function can be efficiently operated, and the upper base material itself can be maintained in a good state, and
The effect that the dew condensation phenomenon on the back side of the metal roof plate can be reliably prevented is obtained.

In addition, since the roof structure according to the present invention is excellent in waterproofness and weather resistance, it is not necessary to use a long roof plate member in consideration of the joints of the roof plates, that is, the roof plate can be miniaturized, so that it is narrow. The advantages are that it is easy to handle and work in places, and there are no problems in transportation.

On the other hand, according to the roof construction method of the present invention, the eaves-side end of the roof plate (the first roof plate at the roof top and the second roof plate at other portions) located on the ridge side is The roof plate of No. 2 is superposed in the vicinity of the slope start portion, and the back side of the face plate of the roof plate located on the ridge side is supported by the supporting surface of the roof plate located on the eaves side, and is located on the ridge side. Only the work of overlapping the face plate part of the roof plate with the inclined surface part of the roof plate located on the eaves side is basically performed, and when the roof is being roofed, basically special processing and engagement operation for the roof plate is performed. Since it is not necessary to apply the above, and it is not necessary to prepare a long roof plate as described above, even if not a skilled construction engineer,
The effect that a large dome-shaped roof excellent in weather resistance and appearance can be easily roofed is obtained.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of a roof structure according to the present invention, FIG. 2 is an external perspective view of the same, and FIGS. 3 and 4 are side sectional views of a roof plate used for the roof structure. FIG. 5 is an external perspective view, FIG. 5 is a side sectional view showing details of a connecting portion of a roof that is roofed using the roof plate, and FIGS. 6 and 7 are main parts of an embodiment in which details of the roof plate are different from each other. Sectional side views shown in FIGS. 8 to 12 are front sectional views of the same, FIG. 13 is an external perspective view showing still another embodiment relating to a roof panel, and FIG. 14 is a roof roofed using this roof panel. FIG. 15 is a schematic perspective view of a conventional example, and FIG. 15 is a front sectional view of a main part of the roof structure for showing another example of the metal rafter. It is a side sectional view showing a structure. (10) …… First roof plate (11) …… Second roof plate (12) …… Face plate part (13) …… Side connection part (14) …… Eave side end part (15) …… Building side end (16) …… Sloping surface (17) …… Bottom surface (18) …… Support end surface (19) …… Support surface (20) …… Space (21) …… Eave side contact surface (22) ) …… Watertight material (23) …… Upper base material (24) …… Main building material (25) …… Lower base material (26) …… Air layer (27) …… Rafters (P) …… Inclination start point

Claims (4)

[Claims] 1. A face plate portion forming a roof surface is provided with side connecting portions with other adjacent roof plates on both side edge portions, and has an outer shape corresponding to a roof top shape, and at both ends thereof. A first roof plate that forms an eaves-side end portion and side connection portions are also provided on both side edge portions of the face plate portion, and the face plate portion has an inclined surface portion that drops from the middle to the ridge side and rises from the ridge side end portion. A support end surface having a support surface located at substantially the same height as the roof surface is provided at the upper end portion thereof, and second roof plates formed between the side connecting portions on both sides are provided, respectively. A roof structure in which a plurality of second roof plates are connected to both ends of the roof plate in the eaves ridge direction, and each roof plate connected in the eaves ridge direction is a roof plate eave located on the ridge side. The side edge is overlapped with the vicinity of the slope start part of the slope of another roof plate located on the eaves side, and The back surface of the ridge-side roof plate is supported by the supporting surface of the eaves-side roof plate, and there is a space between the inclined surface part and the supporting end surface of the eaves-side roof plate and the face-plate part of the ridge-side roof plate that covers the eaves-side roof plate from above. The roof structure is characterized by 2. A lower base material is laid on a support material such as a roof purlin, and the roof plate is supported with a space between the lower base material and the upper base material, and the upper base material is provided. An air layer is formed between the base material and the lower base material.
The roof structure described in paragraph. 3. A face plate portion forming a roof surface is provided with side connecting portions with other adjacent roof plates on both side edge portions, and has an outer shape corresponding to a roof top shape, and at both ends thereof. A first roof plate that forms an eaves-side end portion and side connection portions are also provided at both side edge portions of the face plate portion, and the face plate portion rises from an inclined surface portion and a ridge-side end portion that fall from the middle to the ridge side. A second roof plate having support end surfaces each having a support surface located at substantially the same height as the roof surface and formed between the side connecting portions on both sides is prepared. Of the roof plate located on the ridge side while polymerizing the eaves side end of the plate or the second roof plate located on the ridge side near the slope start portion of the sloped surface portion of the second roof plate located on the eave side. The back side of the face plate part is supported by the supporting surface of the roof plate located on the eaves side, and the shop is located on the ridge side. A roof construction method characterized in that a plurality of roof plates are roofed toward the eaves by superimposing the face plate part of the root plate on the inclined surface part of the roof plate located on the eaves side. 4. When the first and second roofing boards are being roofed, an upper base material should be attached to the back surface of the roofing board in advance so as not to interfere with other roofing boards when the roof is roofed. The method for constructing a roof according to claim 3, wherein: