Installation method of large-span double-layer profiled metal sheet roof

CN118187392BActive Publication Date: 2026-10-23CHINA 19TH METALLURGICAL CORP
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Patent Information

Application Number
CN202410468666.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-04-18
Publication Date
2026-10-23
Estimated Expiration
2044-04-18

AI Technical Summary

Technical Problem

此种方法安装,需要在建筑周围预留较大场地进行压瓦作业,对于场地狭小的工程建筑,条件不具备的还需要场外集中压制然后运输至指定地点进行吊装,增加了吊装费用及工期时间,增加施工成本,同时对于大跨度的屋面还需要将瓦进行分时间段压制,后期防水措施的防水效果差,不能在瓦安装过程及时防水处理,增加了后期屋面板安装的防水措施且不利于屋面的防水,屋面容易漏水

Benefits of technology

[0024]本发明的有益效果是:本申请的大跨度双层压型金属板屋面安装方法,包括以下步骤S1现场踏勘-S2选择高空压瓦机-S3将高空压瓦机移至房内平台孔洞正下方升高压瓦平台-S4启动压瓦机压-S5压瓦完成后降低压瓦平台封闭檩条安装底瓦-S6将高空压瓦机移至房外在辅房建筑的顶部安设移动运输支架装置-S7将移动运输支架装置移动至屋面瓦站位点移动高空压瓦机与移动运输支架装置的末端连接-S8启动压瓦机压底瓦压制完成后安装屋面瓦。用于在场地狭小跨度大的屋面压型金属板安装,底瓦和屋面瓦安装过程中及时防漏水处理,因为后期防水措施的防水效果没有施工过程中及时进行防漏水处理的防水效果好,避免后期防水处理,减少出现漏水情况,同时缩短施工工期,提高施工效率,降低施工成本,尤其适用于钢结构厂房四周有辅房建筑的情况下屋面压型金属板安装。

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Abstract

The application discloses a large-span double-layer profiled metal sheet roof installation method and relates to the technical field of roof installation. The method solves the problem of inconvenient installation of a profiled metal sheet roof in a small site with a large span in the prior art. The method comprises the following steps: S1, site investigation; S2, reserving a roof tile station position and a profiled tile machine platform hole; S3, moving the profiled tile machine to the position directly below the platform hole in the room and raising a profiled tile platform; S4, starting the profiled tile machine; S5, lowering the profiled tile platform after the profiled tile is completed, installing a bottom tile and a purlin; S6, moving the profiled tile machine to the top of an auxiliary building and setting a mobile transportation support device; S7, moving the mobile transportation support device to the roof tile station position, connecting the profiled tile machine with the end of the mobile transportation support device; and S8, starting the profiled tile machine to press the bottom tile and installing a roof tile after the pressing is completed. The large-span double-layer profiled metal sheet roof installation method is used for installing a profiled metal sheet roof in a small site with a large span, reduces the occurrence of water leakage, shortens the construction period and improves the construction efficiency.
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Description

Technical Field

[0001] This invention relates to the field of roof installation technology, and in particular to a method for installing a large-span double-layer profiled metal roof. Background Technology

[0002] Corrugated metal sheets for construction are corrugated steel sheets formed by cold-rolled thin steel sheets as the base material, which are then galvanized or aluminum-zinc coated and coated with a color coating before being rolled and cold-bent into shape. Corrugated metal sheets are widely used in various construction projects, such as industrial plants, warehouses, aircraft hangars, stadiums, exhibition centers, commercial markets, furniture and catering establishments, high-rise buildings, residences, villas, and earthquake-resistant prefabricated houses. They feature flexible forming, fast construction speed, beautiful appearance, light weight, and ease of industrialization and commercial reproduction.

[0003] Currently, the land utilization rate of the project is relatively high, with functional auxiliary buildings and structures surrounding the factory buildings. The roof roll forming machine cannot be placed close to the roof eaves. The common installation method for profiled metal roofing is to press the colored metal rolls on the ground according to the design requirements using a roof roll forming machine, and then use a crane to lift the pressed roof panels onto the roof structure for installation. This method requires a large area around the building for the tile forming operation. For projects with limited space, or where this is not feasible, off-site pressing and transportation to a designated location for hoisting are necessary, increasing hoisting costs and construction time, thus increasing overall construction costs. Furthermore, for large-span roofs, the tiles need to be pressed in stages, resulting in poor waterproofing effectiveness. The inability to perform timely waterproofing during tile installation increases the need for waterproofing measures after roof panel installation and is detrimental to overall roof waterproofing, making the roof prone to leaks. Summary of the Invention

[0004] This invention provides a method for installing large-span double-layer profiled metal roofing, which enables the installation of profiled metal roofing panels in environments with limited space and large spans, reducing the occurrence of water leakage, shortening the construction period, improving construction efficiency, and reducing construction costs.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] This invention discloses a method for installing a large-span double-layer profiled metal roof, comprising the following steps:

[0007] S1. Site survey;

[0008] S2. Select a high-altitude tile press machine and reserve the roof tile station point and the bottom tile press machine platform hole;

[0009] S3. Drive the high-altitude tile press machine sequentially to the bottom tile press machine platform hole, raise the tile pressing platform of the high-altitude tile press machine to the bottom tile press machine platform hole, and ensure that the tile outlet of the tile pressing platform is not lower than the upper surface of the purlin.

[0010] S4. Start the high-altitude roll forming machine to press the bottom tile of the color steel coil;

[0011] S5. After the bottom tile at the hole of the bottom tile pressing machine platform is pressed, the pressing platform is lowered, the purlin is closed, and the locking edge is installed on the bottom tile in sequence according to the traveling direction of the high-altitude tile pressing machine.

[0012] S6. Drive the high-altitude roll forming machine to the outside of the factory building and install a mobile transport support device on the top of the auxiliary building on the outside.

[0013] S7. Move the mobile transport support device to the roof tile station point, move the high-altitude tile press to the corresponding position, and connect the tile output platform of the high-altitude tile press to the end of the mobile transport support device;

[0014] S8. Start the high-altitude roofing tile press to press roofing tiles from the color steel coils. The pressed roofing tiles are transported to the roofing tile station by the mobile transport support device. The locked-edge roofing tiles are pressed and installed sequentially along the axis of the factory building.

[0015] Furthermore, the mobile transport support device includes a transport roller platform and a transport roller platform support. The transport roller platform includes two relatively parallel side beams, and multiple rubber rollers are rotatably arranged at equal intervals between the side beams. The transport roller platform support includes multiple pairs of columns, each pair of columns being arranged opposite each other at the bottom of the side beams. The side beams are bolted to the columns. The top surface of the rubber rollers is not higher than the upper surface of the side beams, and the length of the rubber rollers is greater than or equal to the width of the metal plate.

[0016] Furthermore, the mobile transport support device is composed of multiple segmented units, and adjacent segmented units are fixedly connected by bolts.

[0017] Furthermore, a motor is provided at the end of the rubber roller, and the output shaft of the motor is fixedly connected to the end of the rubber roller.

[0018] Furthermore, the side beam is a channel steel, and a limiting plate is provided along the edge of the wing plate of the channel steel.

[0019] Furthermore, the lower end of the column is provided with a base, and the bottom of the base is provided with rollers.

[0020] Furthermore, a top plate is provided at the upper end of the column, and the top plate is welded to the column.

[0021] Furthermore, a connecting plate is provided between the two columns in each pair.

[0022] Furthermore, connecting inclined plates are intersecting between adjacent columns on the same side.

[0023] Furthermore, an insulation layer is provided between the bottom tile and the roof tile.

[0024] The beneficial effects of this invention are as follows: The method for installing a large-span double-layer profiled metal roofing sheet in this application includes the following steps: S1 Site survey - S2 Selecting an aerial roll forming machine - S3 Moving the aerial roll forming machine to the inside of the building platform directly below the opening and raising the roll forming platform - S4 Starting the roll forming machine - S5 After the roll forming is completed, lowering the roll forming platform, closing the purlins, and installing the bottom tiles - S6 Moving the aerial roll forming machine outside the building and installing a mobile transport support device on the top of the auxiliary building - S7 Moving the mobile transport support device to the roof tile station and connecting the end of the aerial roll forming machine to the mobile transport support device - S8 Starting the roll forming machine to press the bottom tiles and installing the roof tiles after pressing. This product is used for installing profiled metal roofing sheets in confined spaces with large spans. It is essential to address any leaks during the installation of both the base and roof tiles, as the effectiveness of waterproofing measures implemented later is far superior to that of timely leak prevention during construction. This approach avoids the need for later waterproofing treatments, reduces the likelihood of leaks, shortens the construction period, improves efficiency, and lowers costs. It is particularly suitable for installing profiled metal roofing sheets in steel structure factory buildings surrounded by auxiliary buildings. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a flowchart of the construction method for the double-layer curtain wall structure of the present invention.

[0027] Figure 2 This is a simplified schematic diagram of the structure of the hole in the bottom tile pressing machine platform inside the factory building in the embodiment;

[0028] Figure 3 This is a simplified schematic diagram of the assembly structure of the high-altitude tile press and mobile transport support device for the factory roof tiles in the embodiment.

[0029] Figure 4 This is a schematic diagram of the assembly of the high-altitude tile press and mobile transport support device for the factory roof tiles in the embodiment.

[0030] Figure 5This is a front view of the mobile transport support device in the embodiment;

[0031] Figure 6 This is a side view of the mobile transport support device in the embodiment;

[0032] Figure 7 This is a schematic diagram of the assembly of the column and roller in the embodiment;

[0033] Figure 8 This is a simplified schematic diagram of the assembly structure of the rubber roller and motor in the embodiment.

[0034] Reference numerals: 1. High-altitude tile press machine; 101. Tile press platform; 2. Mobile transport support device; 201. Side beam; 202. Rubber roller; 203. Column; 204. Horizontal plate; 205. Top plate; 206. Base; 207. Connecting inclined plate; 208. Connecting block; 209. Roller; 2010. Motor; 2011. Limiting plate; 3. Factory building; 4. Auxiliary building; 5. Hole in the bottom tile press machine platform; 6. Purlin. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0037] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, the present invention provides a method for installing a large-span double-layer profiled metal roof, comprising the following steps:

[0038] S1. Conduct a site survey and understand the site environment and conditions, including material storage and crane locations;

[0039] S2. Select the high-altitude tile press machine 1 according to the height and span of the factory building 3, reserve the roof tile station point and reserve the bottom tile press machine platform hole, and reserve the bottom tile press machine platform hole 5 according to the tile pressing platform 101 of the high-altitude tile press machine 1. The size of the bottom tile press machine platform hole 5 is larger than the size of the tile pressing platform 101. Determine the number of tiles to be pressed at each bottom tile press machine platform hole 5 according to the number of bottom tile press machine platform holes 5.

[0040] S3. The high-altitude tile press machine 1 is driven sequentially to the area below the bottom tile press machine platform hole 5 on one side of the roof ridge centerline of the factory building 3. The tile pressing platform 101 of the high-altitude tile press machine 1 is raised to the corresponding bottom tile press machine platform hole 5. The tile outlet of the tile pressing platform 101 is not lower than the upper surface of the purlin 6. The tile outlet of the tile pressing platform 101 is flush with the upper surface of the purlin 6 or slightly higher than the upper surface of the purlin 6. For example, if the tile outlet of the tile pressing platform 101 is 5mm higher than the upper surface of the purlin 6, it is convenient to smoothly transport the bottom tiles to both sides of the bottom tile press machine platform hole 5.

[0041] S4. Start the high-altitude roll forming machine 1 to press the bottom tile of the color steel coil. Press the bottom tile according to the design requirements and temporarily place the pressed bottom tile on both sides of the hole 5 of the roll forming machine platform.

[0042] S5. After the bottom tiles at each of the bottom tile pressing machine platform holes 5 are pressed, lower the pressing platform 101, close the purlin 6, and install the locking edges on the bottom tiles sequentially according to the traveling direction of the high-altitude pressing machine 1. Turn the high-altitude pressing machine 1 around and adjust the pressing platform 101 to be below the bottom tile pressing machine platform hole 5 on the other side of the roof ridge centerline of the factory building 3. Raise the pressing platform 101 of the high-altitude pressing machine 1 to the corresponding bottom tile pressing machine platform hole 5. The tile outlet of the pressing platform 101 is not lower than the upper surface of the purlin 6. Start the high-altitude pressing machine 1 to press the color steel coil. After the bottom tiles at each of the bottom tile pressing machine platform holes 5 are pressed, lower the pressing platform 101, close the purlin 6, and install the locking edges on the bottom tiles on the other side of the roof ridge centerline sequentially according to the traveling direction of the high-altitude pressing machine 1. The overlapping parts of the bottom tiles can be sealed with sealant to prevent water leakage.

[0043] S6. Drive the high-altitude tile press machine 1 to the outside of the factory building 3. According to the roof tile station point, set the mobile transport support device 2 on the top of the auxiliary building 4 on the side of the ridge center line of the outer factory building 3; the starting end of the mobile transport support device 2 is connected to the roof tile station point.

[0044] S7. Move the high-altitude tile press 1 to the position of the mobile transport support device 2. The tile output platform of the high-altitude tile press 1 is connected to the end of the mobile transport support device 2. The tile output platform 101 is flush with the end of the mobile transport support device 2 or slightly higher than the end of the mobile transport support device 2, so as to facilitate the smooth transportation of roof tiles to the mobile transport support device 2 to the roof tile station.

[0045] S8. Start the high-altitude roof tile press 1 to press color steel rolls. The roof tiles are transported to the roof tile station on one side of the ridge centerline of the factory building 3 via the mobile transport support device 2. The roof tiles are pressed and installed sequentially along the axial side of the factory building 3 (pressed and installed sequentially from the roof tile station to the ridge in a direction perpendicular to the ridge). Move the mobile transport support device 2 to the roof tile station on the other side of the ridge centerline of the factory building 3. Move the high-altitude roof tile press 1 to the corresponding position on the other side of the ridge centerline of the factory building 3. Connect the tile output platform of the high-altitude roof tile press 1 to the end of the mobile transport support device 2. Start the high-altitude roof tile press 1 to press color steel rolls. The roof tiles are transported to the roof tile station on the other side of the ridge centerline of the factory building 3 via the mobile transport support device 2. The roof tiles are pressed and installed sequentially along the axial side of the factory building 3. The overlapping parts of the roof tiles can be sealed with sealant to prevent water leakage.

[0046] The above-mentioned method for installing large-span double-layer profiled metal roofing includes the following steps: S1 Site survey; S2 Selecting a high-altitude roll forming machine; S3 Moving the high-altitude roll forming machine to the platform directly below the opening inside the building and raising the roll forming platform; S4 Starting the roll forming machine; S5 After roll forming is completed, lowering the roll forming platform, closing the purlins, and installing the bottom tiles; S6 Moving the high-altitude roll forming machine outside the building and installing a mobile transport support device on the top of the auxiliary building; S7 Moving the mobile transport support device to the roof tile station, moving the high-altitude roll forming machine, and connecting the end of the mobile transport support device; S8 Starting the roll forming machine to press the bottom tiles, and installing the roof tiles after pressing. This method is used for installing profiled metal roofing in areas with limited space and large spans. Timely waterproofing is crucial during the installation of both the bottom and roof tiles, as the effectiveness of later waterproofing measures is not as good as timely waterproofing during construction. This method avoids the need for later waterproofing treatment, reduces the occurrence of leaks, shortens the construction period, improves construction efficiency, and reduces construction costs. It is particularly suitable for installing profiled metal roofing in steel structure factory buildings surrounded by auxiliary buildings.

[0047] Specifically, the mobile transport support device 2 includes a transport roller platform and a transport roller platform support. The transport roller platform includes two relatively parallel side beams 201, and multiple rubber rollers 202 are rotatably arranged at equal intervals between the two side beams 201. The transport roller platform support includes multiple pairs of columns 203, each pair of columns 203 being arranged opposite each other at the bottom of the side beams 201. The side beams 201 are bolted to the columns 203. The top surface of the rubber rollers 202 is not higher than the upper surface of the side beams 201, and the length of the rubber rollers 202 is greater than or equal to the width of the metal plate.

[0048] If two 6m long No. 10 channel steels are used as edge beams 201, bolt holes are drilled at the connection between the channel steel and the column 203. The channel steel and column 203 are connected using two M8 bolts. The width of the bottom tile and roof tile is less than the distance between the two edge beams 201. For example, if the width of the bottom tile and roof tile is less than or equal to 1m, the distance between the two edge beams 201 is 1.2m. The length of the roof tile is greater than the distance between two adjacent rubber rollers 202 to prevent the roof tile from falling off the rollers 202 and ensure smooth transport. The length of the rubber roller 202 is greater than or equal to the width of the roof tile to ensure smooth transport on the roller. The top surface of the rubber roller 202 is not higher than the top surface of the edge beam 201. A transport trough is formed between the rubber roller 202 and the two edge beams 201, ensuring that the lower end of the roof tile is within the transport trough and preventing the roof tile from deviating from the rubber roller 202 and falling off. The inclination of the transport roller platform is the same as that of the roof to ensure smooth transport and handling. Columns 203 are arranged in pairs, or multiple pairs of columns 203 are positioned opposite each other along the length of the side beam 201 at the bottom of the side beam 201, such as two, three, or four pairs. Columns 203 can be made of HN100*50*5*7 narrow-flange H-beams.

[0049] In one possible implementation, the mobile transport support device 2 is composed of multiple segmented units, and adjacent segmented units are fixedly connected by bolts.

[0050] The mobile transport support device 2 is composed of multiple segmented unit structures, such as two, three, four or more segments, which facilitates installation, disassembly and transportation.

[0051] Preferably, a motor 2010 is provided at the end of the rubber roller 202, and the output shaft of the motor 2010 is fixedly connected to the end of the rubber roller 202.

[0052] A motor 2010 is installed at the end of the rubber roller 202 to provide rotational transport power for the roller 202, preventing accumulation and smoothly transporting the roof tiles to the roof tile station. The motor 2010 can be powered by an external power source.

[0053] The side beam 201 is a channel steel, and a limiting plate 2011 is provided along the edge of the wing plate of the channel steel.

[0054] Channel steel has high strength, good stability, and low cost, making it very suitable for use as the side beam 201. The height of the limiting plate 2011 is higher than the upper surface of the side beam 201, and the setting of the limiting plate 2011 further prevents the profiled metal sheet from deviating during the conveying process.

[0055] Preferably, the lower end base 206 of the column 203 is provided with a base 206, and the bottom of the base 206 is provided with a roller 209.

[0056] The base 206 is welded to the column 203. The width and length of the base are 150mm×200mm. The base 206 is easy to install the rollers 209. The rollers 209 are easy to move the mobile transport support device 2. The rollers 209 can be lockable casters.

[0057] Preferably, the upper end of the column 203 is provided with a top plate 205, and the top plate 205 is welded to the column 203.

[0058] The bolted connection between the top plate 205 and the side beam 201 facilitates installation and disassembly, and the top plate 205 provides better support for the side beam 201.

[0059] Preferably, a connecting plate 204 is provided between the two columns 203 in each pair.

[0060] A connecting plate 204 is provided between each pair of two uprights 203 (two uprights 203 arranged opposite each other). The connecting plate 204 is made of angle steel and is bolted to the uprights 203. If the connecting plate 204 is located at the lower end of the two uprights 203, the two angle steels of each pair are fixedly connected, which improves the stability of the transport roller platform support and thus improves the stability of the mobile transport support device 2.

[0061] Preferably, connecting inclined plates 207 are provided between adjacent columns 203 on the same side.

[0062] Intersecting connecting inclined plates 207 are installed between the columns 203 to increase the stability of the mobile transport support device 2. The connecting inclined plates 207 are bolted to the connecting blocks 208.

[0063] Preferably, an insulation layer is provided between the bottom tile and the roof tile.

[0064] The insulation layer is placed between the bottom tiles and the roof tiles. If the insulation cotton or insulation board is firmly installed on the top surface of the bottom tiles or the bottom surface of the roof tiles with adhesive or screws, the insulation layer will provide thermal insulation for the factory building and ensure a comfortable environment inside the factory building.

[0065] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for installing a large-span double-layer profiled metal roof, characterized in that, Includes the following steps: S1. Site survey; S2. Select a high-altitude tile press machine (1), and reserve the roof tile station point and the bottom tile press machine platform hole (5); S3. Drive the high-altitude tile press machine (1) to the bottom tile press machine platform hole (5) in sequence, raise the tile pressing platform (101) of the high-altitude tile press machine (1) to the bottom tile press machine platform hole (5) in the corresponding position, and the tile outlet of the tile pressing platform (101) is not lower than the upper surface of the purlin (6). S4. Start the high-altitude roll forming machine (1) to press the bottom tile of the color steel coil; S5. After the bottom tile is pressed at the hole (5) of the bottom tile pressing machine platform, the pressing platform (101) is lowered, the purlin (6) is closed, and the locking edge is installed on the bottom tile in sequence according to the traveling direction of the high-altitude pressing machine (1). S6. Drive the high-altitude roll forming machine (1) to the outside of the factory building (3) and set up a mobile transport support device (2) on the top of the auxiliary building (4) on the outside. S7. Move the mobile transport support device (2) to the roof tile station, move the high-altitude tile press (1) to the corresponding position, and connect the tile output platform of the high-altitude tile press (1) to the end of the mobile transport support device (2). S8. Start the high-altitude roofing tile press (1) to press roofing tiles on the color steel coil. The pressed roofing tiles are transported to the roofing tile station by the mobile transport support device (2). The locked-edge roofing tiles are pressed and installed in sequence according to the axis of the factory building (3).

2. The method for installing a large-span double-layer profiled metal roof according to claim 1, characterized in that, The mobile transport support device (2) includes a transport roller platform and a transport roller platform support. The transport roller platform includes two relatively parallel side beams (201). Multiple rubber rollers (202) are rotatably arranged at equal intervals between the side beams (201). The transport roller platform support includes multiple pairs of columns (203). Each pair of columns (203) is arranged opposite to the bottom of the side beams (201). The side beams (201) are bolted to the columns (203). The top surface of the rubber rollers (202) is not higher than the upper surface of the side beams (201). The length of the rubber rollers (202) is greater than or equal to the width of the metal plate.

3. The method for installing a large-span double-layer profiled metal roof according to claim 2, characterized in that, The mobile transport support device (2) is composed of multiple segmented units, and adjacent segmented units are fixedly connected by bolts.

4. The method for installing a large-span double-layer profiled metal roof according to claim 2, characterized in that, A motor (2010) is provided at the end of the rubber roller (202), and the output shaft of the motor (2010) is fixedly connected to the end of the rubber roller (202).

5. The method for installing a large-span double-layer profiled metal roof according to claim 2, characterized in that, The side beam (201) is a channel steel, and a limiting plate (2011) is provided along the edge of the flange of the channel steel.

6. The method for installing a large-span double-layer profiled metal roof according to claim 2, characterized in that, The lower end of the column (203) is provided with a base (206), and the bottom of the base (206) is provided with a roller (209).

7. The method for installing a large-span double-layer profiled metal roof according to claim 6, characterized in that, The upper end of the column (203) is provided with a top plate (205), and the top plate (205) is welded to the column (203).

8. The method for installing a large-span double-layer profiled metal roof according to claim 2, characterized in that, A connecting cross plate (204) is provided between the two columns (203) of each pair.

9. The method for installing a large-span double-layer profiled metal roof according to claim 8, characterized in that, Connecting inclined plates (207) are provided between adjacent columns (203) on the same side.

10. The method for installing a large-span double-layer profiled metal roof according to claim 1, characterized in that, An insulation layer is installed between the bottom tile and the roof tile.

Citation Information

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