JPH02140353A - Construction of laterally covered roof - Google Patents

Abstract

PURPOSE:To easily fix a suspended member onto a rafter member with the superior workability by assembling a next stage suspended member onto the rafter member and inserting a next stage side backing member between the rafter member and a next stage side roof plate. CONSTITUTION:An engaging hook part 27 as the top edge contact part of a next stage side suspending member 21 is hooked onto an engagement piece part 37 and turned, and the lower part side edge part 44b of the next stage side backing member 44 is placed onto a placing stage part 25. Therefore, the laterally covered roof plates 31 and the backing member 44 can be assembled and fixed onto a rafter member 11 without using the installation bolts and nuts only by the exceedingly simple work by finally caulking an engaging hook piece 16.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a method for constructing a horizontal roof in which long metal plate roof plates are roofed from the ridge (upper) side to the eave (lower) side. be.

[Conventional technology]

Conventionally, for example, as shown in Japanese Patent Publication No. 55-535,
A method of constructing a horizontal roof is known, in which shingles are covered from the ridge side to the eave side.

In addition, as shown in Japanese Utility Model Publication No. 1225/1983, a rectangular engagement hole and two cut-out locking claw pieces are provided at the top of the rafter member, and two holes are inserted into the base of the hanger member. A locking portion and a rectangular engagement tongue hanging down on the back side are formed, and the engagement tongue is passed through the engagement hole and engaged, and the locking portion is connected to the locking claw. By engaging and caulking these locking claw pieces to the surface board part, the board part of the hanger member is fixed to the top surface part of the rafter member, and the hanger member is used to attach the long metal plate. Roofing sheets are also installed sequentially from the eaves side to the ridge side.

(Problems to be Solved by the Invention) In order to roof a long metal plate from the ridge side to the eave side using the conventional rafter members and hanger members described above, it is necessary to start from the surface side of the rafter members. Pass the engaging tongue piece provided on the base part of the hanger member through the engaging part provided on the top face part of the rafter member almost perpendicularly to the top face part, and also engage the locking part provided on the base part. It is necessary to engage the claw pieces, and at this time, attach the hanger member to the eave side molding part of the previous roof board with the next roof board adjacent to the eaves hooking the ridge molding part. Because it is located on the surface side of the part, it is difficult to assemble the hanger member to the rafter member, and it is also difficult to insert the base member of each tier between the rafter member and the roof board of each tier so that they partially overlap. There was a problem that it was difficult to install and that it was difficult to construct a horizontal roof.

The present invention solves the above-mentioned problems, and provides a roof plate made of long metal plates, which allows hanging members to be easily fixed to rafter members with good workability, and also allows easy insertion of base members. The purpose of this invention is to provide a method for constructing a horizontal thatched roof in which roofs are roofed from the ridge side to the eave side.

Means for Solving Problem C] The method for constructing a horizontal 1-inch roof according to the present invention includes forming an eave-side molded part and a ridge-side molded part on both sides of a face plate formed at the center in the width direction of a long metal plate. One set consists of a roof plate formed integrally, an engagement hole located on the upper side of the top surface, and one cut-out locking claw piece located on the lower side, and these are arranged in large number in the longitudinal direction at predetermined intervals. A locking part consisting of a cutout is formed on the formed metal rafter member and the lower side edge of the base plate, and a locking part consisting of a cutout is formed on the raised part raised from the upper side edge of the base plate on the surface side of the base plate. A protruding engaging tongue piece is formed, a mounting step part is provided in the middle part of the rising part to bend and project to the lower side, and a tip part is provided to the upright end part of the rising part to protrude to the lower side. The ridge side molding part of the next roof board is hooked to the eave side molding part of the previous roof board, and the upper side of the next stage base member is attached to the top surface of the rafter member. is supported by the base plate portion of the front-side hanger member to which the front-side hanger member is supported and fixed, and then the tip of the next-side hanger member is temporarily engaged with the eave-side molded portion of the next-side roof board, and the above-mentioned The next-stage hanging member and the next-stage roof board are rotated toward the rafter member around the ridge-side molded part of this roof board, and the next-stage hanging member is rotated relative to the next-stage roof board. and move the next-stage base member to the upper side,
The upper side of this next-stage base member is placed on the mounting step part of the next-stage suspender member, supported by the rising part of the next-stage suspender member, and then placed on the base part of the next-stage suspender member. The provided engagement tongue piece is engaged with the engagement hole provided on the top surface of the rafter member, and the locking portion provided on the base plate of the next-stage side suspender member is provided on the top surface of the rafter member. Engage with the claw pieces, support the base plate part of the next-stage suspender member on the top surface part of the rafter member, and engage the ridge-side molded part of the next-stage roof board with the eave-side engagement part of the previous-stage roof board. Then, the eave side forming part of the next-stage roof board is held and engaged with the tip of the next-stage hanging member member, and then the locking claw piece of the rafter member is attached to the next-stage side hanging member. By caulking the top surface of the side hanger member and fixing the base plate of the next-stage side hanger member to the top surface of the rafter member, the roof sheets are successively installed from the line side to the eave side.

[For production]

The method for constructing a horizontal roof according to the present invention is as follows: 1) By using the rafter members and the hanger member having the above-described configuration, the tip of the next-level hanger member is attached to the eave side molded part of the next-level roof board. With the parts temporarily engaged, rotate them toward the rafter member around the eave side molded part of the next roof board, and rotate the next suspension member relative to the next roof board. By moving it, the next-stage hanger member can be assembled to the rafter member from the surface side in the diagonal eave direction.

That is, the engagement tongue provided on the base plate of the hanger member can be engaged with the engagement hole provided on the top surface of the rafter member from the diagonal eave direction surface side, and the locking tongue piece of the hanger member can be engaged with the engagement hole provided on the top surface of the rafter member. The part is formed by cutting out the lower edge of the base plate part, so that it can be engaged with the locking pawl piece provided on the top surface part from the oblique eaves direction surface side. Therefore, even if there is a next-level roof board whose ridge-side molded part is hooked to the eave-side molded part of the previous-stage roof board on the surface side of the attachment part of the next-stage side hanger member, the next-stage hanger member The member can be easily assembled to the metal rafter member in a short time, and since it is only necessary to caulk one locking claw piece to the base plate, fixing the hanger member to the rafter member is easy. Works well. Furthermore, with the ridge side molding part of the next roof board hanging over the eave side molding part of the previous roof board, the next base member is inserted between the rafter member and the next roof board. After that, move the next-stage dowel member to the upper side, place it on the mounting step part of the next-stage suspender member, support it on the standing part of the next-stage suspender member, and then move it as described above. By assembling and fixing the next-stage suspender member to the rafter member, the upper side of the next-stage base member is placed below the lower side of the previous-stage base member. It is possible to easily insert the next-level base member between the rafter member and the next-level roof board in an overlapping state through the intervening structure.6 Moreover, according to this construction method, the suspender member can be inserted after the hanging member is erected. Because of the supporting structure, the bonding strength between the hanger member and the rafter member can be extremely increased.

〔Example〕

Hereinafter, the method for constructing a horizontal roof according to the present invention will be explained in detail with reference to FIGS. 1 to 6.

Fig. 1 is a sectional view showing a roof obtained by the horizontal roof construction method according to this example, and Figs. 2, 3, and 5 show detailed configurations of the rafter members, hanger members, and roof plates. FIG. 4 is a sectional view taken along the line IV--IV in FIG. It is a cross-sectional explanatory view. In the following description, the side corresponding to the building will be referred to as the upper side, and the side corresponding to one house will be referred to as the lower side.

In this example, the roof assembly (
As shown in Figure 2, the individual rafter members (11) installed at predetermined pitch intervals along the roof slope (not shown) are made of thick metal plates with left and right lower flanges. The rafter member (11) is roll-formed to have a channel-like cross section, and on the top surface (12) of the rafter member (11), hanger members described below are attached at predetermined intervals along the longitudinal direction of the rafter member (11). , engagement hole (13) on the top side
is opened, and a locking claw piece (16) is cut and raised on the lower side, and a large number of sets are sequentially formed with each set of stiffeners.

The engagement hole (13) has a rectangular insertion portion (I4) with a predetermined width formed by opening the top surface portion (12), and a rectangular insertion portion (I4) whose width gradually increases upward from the insertion portion (14). Narrow wedge-shaped engaging portions (15) are formed in a mutually connected state, and the locking claw piece (16) cuts the top surface portion (12) from below to above. rise and form.

In addition, in S, it is on the upper side of the locking claw piece (16),
A locking pawl piece (17
) is for the purpose of using this rafter member (II) for a horizontal roof that is roofed from the 9-house side to the stock system, which is proposed separately, and is not directly related to this example, so we will not explain it. omitted.

Further, as shown in FIGS. 3 and 4, the hanger member (21) has a locking portion (23) for determining and positioning the locking point by the locking claw piece (16). ) has a base plate part (22) cut out from the lower edge of the base plate part (22), and the other edge of the upper side of the base plate part (22) is lowered down to the first rising part (24a), An F other member mounting step part (25) having a predetermined slope is bent and interposed on the surface side of the base plate part (22) at a predetermined height position in the intermediate part, and a base member pushing part (2
5a), and then the second
While raising the rising part (24b), bend it to the lower side at the same slope to form the top support part (26a), and then lower it to the falling part (26b), and then bend it to the upper side. It is folded back to form a folded portion (26c), and an engaging hook portion (27) bent upward is formed at the terminal end to constitute a tip portion.

Also, a first rising portion (
The wedge-shaped engaging portion (1
5) has a constricted portion (28a) having a width narrower than the tip portion, and the tip portion lowers an engagement tongue piece (28) having a smaller width than the insertion portion (14). and the board part (2
2) It is made to protrude from the back surface, and at each bent portion, appropriate reinforcing means are provided by punching out ribs or the like. In addition, the salted hole (29) drilled in the base plate part (22)-F closer to the upper side than the locking part (23)
), attach this hanger member (2I) to the rafter member (1).
Rafter member 2 different from 1) For example, when a wooden rafter member is used, it is used as a needle hole, and also has barbs ( 30) , (:JO) is also used to fix a base member different from the base member described later, and is not directly related to this example, so its explanation will be omitted. omitted.

Furthermore, the horizontal roofing board (31) was previously proposed several times by the inventor of this invention, and as shown in Figure 5, for example, baking for rust prevention requires painting, etc. Using a long metal plate such as a steel plate of a predetermined width and a predetermined unit length that has been processed to provide toughness and weather resistance, this metal plate is formed into a face plate part (32) at the center in the width direction using a roll forming machine or the like. The eave side molding part (33) is left on the lower side, and the ridge side molding part (33) is on the upper side.
34) are formed by continuously forming the metal plates along the longitudinal direction of the metal plates.

Here, the eave side molded part (33) has the face plate part (3
2) is bent outward and downward by a predetermined length corresponding to the falling portion (26b) to make the edge portion (35) fall, and the lower edge is bent inward. It is bent to form an abutment piece (36), and the end of this abutment piece (36) is folded back upwards, and then extended inward as an engagement piece (37). The portion is formed into a bent portion (38).

The ridge side molded part (34) has the face plate part (3
2) a rising portion (39) is made to stand up by a predetermined length from the upper side edge of 2), and the upper end edge is bent outward to abut against the abutting piece portion (36); Katabe (4
0), and in this 1, the end of this abutting piece (40) is folded upwards to extend outward, and then folded back inward to form a retaining section including the surface edge bent part (38). The joint part (37) can be held. Engagement recess (41a
), and the upper end of the holding part (11) is bent inward again to form a locking piece part (42) with a bent edge.

The method of constructing the horizontal roof according to this embodiment is to raise the roof as shown in FIG. 1 by the steps shown in FIGS. 6(a) to 6(f).

In this case, it is assumed that each rafter member (11) is arranged at a predetermined pitch interval on the corresponding roof assembly, which is not shown for convenience of explanation, along the roof slope, and At this rafter member (11), h, the front side horizontal roofing board (31) of the stock system, which is the upper side, is inserted through the front side base member (44) with a flat plate shape in cross section corresponding to the same position, and The description will be made assuming that the roofing has already been installed in the previous stage under the condition of engagement as will be described later by the front side hanger member (21).

When the front side horizontal roof board (31) is installed in this way, each rafter member (11)
The front suspension member (2I) is fixed on the top surface (12) of the suspension member (21). Side edge (44b
) is placed, and the base member (44), the top support part (26a) of the hanger member (21), and the vertical F part (
26b), the tip consisting of the folded part (26c) is
Similarly, the eave side molding part (33) of the front side horizontal roof board (31)
), and the engaging piece part (37) including the bent edge part (38) of the four eave side molded parts (33) is covered with the engaging hook part (27) of the hanger member (21). It is located on the upper side, and from this state, the hanger member (21) on the front side as marked
, and the lower eave side molding part (3) of the horizontal roof board (31).
3), the horizontal roof board (31) and base member (44) on the ninth stage side are assembled, and the roofing is carried out by locking and fixing the hanger members (21) thereto.

That is, first, as shown in FIG. 6(a), the next-stage base member ( 44) and the upper ridge side molded part (3
4) is inserted, and as shown in FIG. However, the insertion of the engagement recess (41a) of the horizontally ruled roof board (31) on the ninth stage side,
After the tentative engagement is achieved, as shown in FIG. 25) to a predetermined position including placing the upper edge portion (44a) on the substrate portion (22) by pushing the upper edge portion (44a) into the push-in portion (25a) formed between the is temporarily inserted.

Subsequently, as shown in FIG. 3(d), the lower eave side molded part (3
3) slightly upwards and bend the tip edge (38
) to the engagement piece (37) including the next-stage suspender member (21).
The falling part (26b) which is the tip of the
6c) and the engaging hook part (27) are hooked, and as shown in FIG.
21), rotate it clockwise around the hook part, and in the middle of this rotation, the lower side edge part ( 44b) on the mounting stage part (25) of the next-stage side hanger member (21), and then continue rotating roughly, the next-stage side hanger Engaging tongue piece (2) of member (21)
8) is an engagement hole (13) formed in the rafter member (11).
) into the insertion part (14) of the neck part (28a
) is a wedge-shaped engagement part that gradually narrows upwards ( ]
5), and the locking portion (23) is fitted so as to come into contact with the upper side surface of the locking claw piece (16).

With this insertion, the upper end edge (44a) of the next-stage base member (44)
) is firmly pushed into the lower side and locked. Thereafter, as shown in FIG. 3(f), by bringing the entire surface of the base plate (22) into contact with and supporting the top surface (12) of the rafter member (11), the tip of the front engagement piece (37) Edge bending part (38)
Or, it is held by the next-stage side holding part (41), and is securely held and engaged by the engagement recess (41a), and both of the abutment pieces (36) and (40) However, due to the applied elasticity and its reaction force, it is strongly pressed in close contact with the two surfaces, and the desired watertightness can be achieved. Finally, the locking claw piece (16) is crimped by hitting the upper side, that is, the base plate (22) surface of the next-stage suspender member (21) with a hammer or the like, as appropriate. The member (21) is fixed to the rafter member (11).

In other words, the engaging hook part (27) as the tip part of the first stage side suspender member (21) is hooked onto the engaging piece part (37) and rotated, and during the rotation, the next stage side hanger member (21) is rotated. Side base member (4
The lower side edge part (44b) of 4) is placed on the mounting step part (25), and the locking claw piece (16) is finally caulked, which is only a very tedious operation. Therefore, the horizontal roof plate (II) and the base member (44) can be assembled and fixed to the rafter members (11), without using any bold nuts or the like. be.

This state is the same as the state initially set, and the operations described below will be performed.

By repeating the work, it is possible to construct a horizontal roof by assembling horizontal roofing boards from the upper side of the stock system to the lower side of the eaves.

Therefore, in this embodiment, the top surface part (1) of the rafter member (11) is
2), when the base plate (22) of the hanger member (21) is attached, the engaging hook (27) of the hanger member (21) or the locking piece of the horizontal roof board (31) (42) is firmly pressed down and hooked, and the ridge side molded part (34) is sufficiently held by the top support part (26a) and the falling part (26b) of the hanger member (21). The eaves side molded part (33) can be supported reliably and effectively from the inside. Further, regarding the base member (44), the upper end edge (44a) is pushed into the lower pushing part (25a) of the mounting step part (25) of the previous upper side hanger member (21), and With the lower end edge (44b) placed on the mounting step (25) of the next lower suspender member (21),
It can be strongly clamped by the face plate part (32) of the horizontal roofing board (31), and by the above operation, the horizontal roofing board (31) on the next stage side as well as the installation side can be accurately clamped. Assemble the roof firmly with the S force, and also install the base material (4
3) The whole can be held under good pressure.

In the construction method according to this embodiment, one role is to use the horizontal roofing board (
Due to the presence of the rising part (39) on the face plate part (32) of 33), the contact pressure part of each abutment piece part (3B), (40) is caused to contact the inner corner part in contact with the same face plate part (32). It will be positioned rising from the corner, so the face plate part (32)
Since the wind and rain blown up along the contact pressure part are not directly blown against this contact pressure part, the influence of the wind and rain pressure can be sufficiently alleviated, and the intrusion of rainwater from the contact pressure part can be eliminated as much as possible. And sand caused by wind and rain.

It can effectively prevent the intrusion of mud and other dust, and even if some rainwater intrudes from the pressure contact part due to capillary action, it will only seep in without any pressure. Therefore, together with the planar and strong engagement and butt holding at this contact pressure part, the internal There is a very small possibility that this will occur, and a more effective waterproofing effect can be obtained for this construction.

〔Effect of the invention〕

As explained above, the present invention involves hooking the ridge-side molding part of the next-stage roof board to the eave-side molding part of the previous-stage roof board, and attaching the upper side of the next-stage base member to the top surface of the rafter member. is supported and fixed on the base plate of the previous-stage side hanging member, and then the tip of the next-side hanging member is temporarily engaged with the eave-side molded part of the next-side roof board, and Rotate the step-side base member and the next-step roof board toward the rafter member around the ridge-side molded part of this roof board, and rotate the next-step suspension member relative to the next-step roof board. In addition, the next-stage base member is moved to the upper side, and the tenth side of the next-stage base member is placed on the mounting stage of the next-stage suspender member to raise the next-stage suspender member. furthermore, the engaging tongue piece provided on the base plate of the next-stage suspender member is engaged with the engaging hole provided on the top surface of the rafter member, and the base plate of the next-stage suspender member is The first part provided is engaged with the locking pawl piece provided on the top surface of the rafter member to support the base plate of the first-stage suspender member on the top surface of the rafter member, and the ridge side of the next-stage roof board is supported. The molded part is engaged with the eave-side engaging part of the previous-stage roof board, and the eave-side molded part of the next-stage roof board is engaged and supported by the tip part of the next-stage hanger member. Then, the locking claw pieces of the rafter members are caulked to the top surface of the next-stage hanger member, and the base plate of the next-level hanger member is fixed to the top surface of the rafter member, thereby fixing the roof board. The roofing was applied sequentially from the line side to the eave side, resulting in the following effects.

In this invention, in a state where the tip of the next-stage hanger member is temporarily engaged with the eave-side molded part of the next-stage roof board, these parts are connected to the rafter member around the eave-side molded part of the next-stage roof board. At the same time, the next-stage hanger member can be rotated relative to the next-stage roof board, and the next-stage hanger member can be assembled to the rafter member from the surface side in the diagonal eave direction.

In other words, the engagement tongue piece provided on the base plate of the hanger member can be engaged with the engagement hole provided on the top surface of the rafter member from the diagonal eave direction surface side, and the engaging tongue piece provided on the base plate portion of the hanger member By cutting out the lower edge of the base plate, it is possible to engage the locking pawl provided on the top surface from the surface side in the direction of the diagonal eaves. For this reason, even if there is a next-stage roof board with the ridge-side molded part hooked onto the eave-side molded part of the previous-stage roof board on the surface side of the attachment part of the next-stage side hanger member, the next-stage roof board The hanger member can be easily assembled to the metal rafter member in a short time, and since it is only necessary to caulk one locking claw piece to the base plate, it is easy to attach the hanger member to the rafter member. Fixation can be done easily. Furthermore, with the ridge side molding part of the next roof board hanging over the eave side molding part of the previous roof board, the next base member is inserted between the rafter member and the next roof board. After that, the next-stage side base member is moved to the upper side and placed on the mounting step of the next-stage side suspender member, and then the next-stage side base member is
By supporting it on the F part and then assembling and fixing the next-stage suspender member to the rafter member as described above, the upper side of the next-stage base member is placed below the lower side of the previous-stage base member. The next-stage base member can be easily inserted between the rafter member and the next-stage roof board in an overlapping state via the mounting portion of the previous-stage hanger member. Therefore, the hanger members can be easily fixed to the rafter members with good workability, and the base member can be inserted between the rafter members and the roof sheets of each level through the hanger members so that they partially overlap. can be easily done. Moreover, according to this construction method, the suspension member is supported in the front and back, so not only can the bonding strength between the suspension member and the rafter member be extremely increased, but also a long metal It is possible to construct a horizontally-thatched roof using board roofing sheets at a low cost.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a roof obtained by a horizontal roof structure construction method according to an embodiment of the present invention, and FIGS. 2, 3, and 5 show rafter members, hanger members, and roof plates, respectively. A perspective view showing the form in detail, Figure 4 is Figure 3 - ■
6(a) to 6(f) are cross-sectional explanatory views showing the steps of the method for constructing a horizontal roof according to the above embodiment. (11)...Rafter member, (12)...Top part,
(13)...Engagement hole, (I4)...Insertion part,
(15)... Engaging portion, (16)... Locking claw piece. (21)...Hipper member, (22)...Base part,
(23)...Locking portion, (24a), (24b)...Rising portion, (25)...
・Placement step part, (25a)...Pushing part, (26
a), (26b), (26c)...Top support part, falling part, folded part (tip part), (27)...Engaging hook part, (28)...Engaging tongue piece , (28a)...constriction. (31)...Horizontal roof board, (32)...Face plate part. 33)...Eave side molding part, (35)...Edge part,:
I6)... Abutting piece part, (37)... Engaging piece part, (8)... Edge bending part. 34... Ridge side molding part, (39)... Rising part,
40)...Abutting piece part, (41)...Holding part, 4
1a)... Engagement recess of holding part, 42)... Locking piece part. 44) Base member having a flat plate shape in cross section. 44a)...Lower side edge portion, 44b)...Upper side edge portion. Patent applicant Funaki Shoji Light Limited Company 6a

Claims (3)

[Claims] (1) A roof plate in which an eave side molded part and a ridge side molded part are integrally formed on both sides of a face plate formed at the center part in the width direction of a long metal plate, and an engagement hole located on the upper side in the top surface part. A metal rafter member with one set of cut-out locking claw pieces located on the lower side, and a number of sets formed in the longitudinal direction at predetermined intervals, and a notch on the lower side edge of the base plate a locking portion is formed, an engaging tongue protruding toward the back side of the substrate portion is formed on a rising portion that stands up from the upper side edge of the substrate portion, and an engagement tongue piece that is bent toward the lower side is formed at an intermediate portion of the rising portion. and a hanging member having a tip portion protruding toward the lower side at the upright end of the rising portion; and a base member; Hook the molded part of the ridge side of the next-stage roof board, and support the upper side of the next-stage foundation member to the base plate of the previous-stage hanger member, whose base plate is supported and fixed to the top surface of the rafter member, and then , temporarily engage the tip of the next-side hanger member with the eave-side molded part of the next-side roof board, and then join the next-side hanger member and the next-side roof board to the ridge-side molding of this roof board. At the same time, the next-stage hanging member is rotated relative to the next-stage roof board, and the next-stage base member is moved to the upper side, and the next-stage side base member is moved to the upper side. The lower side of the base member is placed on the mounting step of the next-stage suspender member and supported by the rising part of the next-stage suspender member, and the engagement provided on the base plate of the next-stage suspender member is further applied. The tongue piece is engaged with the engagement hole provided on the top surface of the rafter member, and the locking portion provided on the base plate of the next-stage suspender member is engaged with the locking claw piece provided on the top surface of the rafter member. the base plate part of the next-stage hanger member is supported on the top surface part of the rafter member, and the ridge-side molded part of the next-stage roof board is engaged with the eave-side engaging part of the previous-stage roof board;
The eave-side molded part of the next-stage roof board is held and supported by the tip of the next-stage hanging member, and then the locking claw piece of the rafter member is attached to the next-stage hanging member. A side-thatched roof characterized in that the roof plates are successively roofed from the ridge side to the eave side by caulking the top surface of the rafter member and fixing the base plate of the next-stage side hanger member to the top surface of the rafter member. Construction method. (2) The ridge side molding part of the roof board has a rising part rising from the face plate part and the abutting piece part which is bent outward from this rising part, and the eave side molding part has a falling end. A patent in which an abutment piece with an edge bent inward is formed on each of the abutment pieces, and the abutment piece of the lower ridge side molding on the previous stage is pressed against the abutment piece on the eave side molding on the upper side of the next stage. A method for constructing a horizontal roof as set forth in claim 1. (3) The molded part on the ridge side of the roof board has a holding part including an engaging recess as a folded part, and the molded part on the eave side has an engaging piece part with a bent edge part at the end. The engaging piece part of the lower eave side molding part on the lower part of the previous stage is received in the holding part of the molding part on the ridge side side of the upper part of the next stage, the bent edge part is butted against the engaging recessed part, and both of these parts are Claim 1 for engaging and connecting
or the method for constructing a horizontal roof as described in paragraph 2.