CN211473114U - Drainage device for fan-shaped metal roof - Google Patents
Drainage device for fan-shaped metal roof Download PDFInfo
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- CN211473114U CN211473114U CN201922081575.1U CN201922081575U CN211473114U CN 211473114 U CN211473114 U CN 211473114U CN 201922081575 U CN201922081575 U CN 201922081575U CN 211473114 U CN211473114 U CN 211473114U
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 40
- 239000002184 metal Substances 0.000 title claims abstract description 40
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 30
- 239000010959 steel Substances 0.000 claims abstract description 30
- 239000011490 mineral wool Substances 0.000 claims abstract description 19
- 238000004321 preservation Methods 0.000 claims abstract description 16
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 239000011491 glass wool Substances 0.000 claims abstract description 14
- 238000005452 bending Methods 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 239000010963 304 stainless steel Substances 0.000 claims description 5
- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 5
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 claims description 5
- 239000008397 galvanized steel Substances 0.000 claims description 5
- 239000002390 adhesive tape Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 241000446313 Lamella Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008520 organization Effects 0.000 description 2
- 206010066054 Dysmorphism Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model relates to a roofing drainage field specifically is a drainage device for fan-shaped metal roofing. The utility model provides a drainage device for fan-shaped metal roofing, includes roofing girder steel (11), furred ceiling (12), outer wall (13), heat preservation rock wool layer (14) and metal curtain wall (15), characterized by: the gutter edge sealing structure further comprises a cornice edge sealing (16), a gutter support (21), a gutter underframe (22), a gutter (23), glass wool (24), a roof waterproof layer (25), an roof panel (26) and a waterproof rubber strip (27), wherein the gutter support (21) is Z-shaped; a gutter (23) is fitted into the gutter with the opening facing upward. The utility model discloses be convenient for the construction, the drainage is smooth and easy, and the outward appearance is pleasing to the eye.
Description
Technical Field
The utility model relates to a roofing drainage field specifically is a drainage device for fan-shaped metal roofing.
Background
In recent years, with the continuous deep development of economic society, steel structure buildings are increasingly adopted in industrial plants and stadiums. In steel construction building, the roof form is the metal roof boarding mostly, and the form is various moreover, considers setting up the gutter to the most former project organization of metal roofing of opposite sex structure and solves the drainage problem of metal roofing, does not consider to set up the gutter structure to former design, and still becomes the difficult problem in the later stage use for the drainage problem of the metal roofing form of dysmorphism-fan-shaped structure, is unfavorable for the discharge of later stage use and rainwater, causes the hidden danger of rainy day "cascade hole" and indoor leaking.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a roofing drainage facility which is convenient for construction, smooth in drainage and beautiful in appearance, the utility model discloses a drainage device for fan-shaped metal roofing.
The utility model discloses a following technical scheme reaches the invention purpose:
a drainage device for a fan-shaped metal roof comprises a roof steel beam, a suspended ceiling, an outer wall, a heat-preservation rock wool layer and a metal curtain wall, wherein the suspended ceiling is laid on the roof steel beam, the suspended ceiling and each roof steel beam are fastened by screws, the outer wall is pasted on the outer vertical surface of the roof steel beam, the heat-preservation rock wool layer is pasted on the outer wall, the metal curtain wall is pasted on the heat-preservation rock wool layer,
the method is characterized in that: also comprises a cornice edge banding, a gutter bracket, a gutter underframe, a gutter, glass wool, a roof waterproof layer, an roof panel and a waterproof adhesive tape,
the gutter brackets are Z-shaped, the lower bottom edges of the two gutter brackets are adhered and covered and fixed on the top surface of the suspended ceiling by screws, one gutter bracket is arranged adjacent to the inner wall of the outer wall, the other gutter bracket is arranged at the inner side of the outer wall, the top edges of the two gutter brackets are arranged oppositely, the height of the top edge of the gutter support at the outer side is higher than that of the top edge of the gutter support at the inner side, a right-angle gutter underframe is respectively arranged at the bottom of the gutter support, the vertical right-angle edge of the gutter underframe is attached and fixed at the bottom of the inner side wall of the gutter support, a space is reserved between the horizontal right-angle edge of the gutter underframe and the top surface of the suspended ceiling, the upper parts of the horizontal right-angle edges of the two gutter support inner side walls of the gutter supports and the horizontal right-angle edge of the gutter underframe form a gutter groove, and the lower parts of the horizontal right-angle edges of the gutter supports and the horizontal right-angle edge of the gutter underframe form a waterproof layer;
the gutter is embedded into the gutter groove in an opening-up mode, the outer side walls of the two gutters are respectively attached to the inner side wall and the middle of one gutter bracket, the two sides of the bottom edge of the gutter are respectively attached to the horizontal right-angle side of the bottom frame of the gutter, and the waterproof layer is filled with glass wool;
the suspended ceiling top surface is located one side of the inner gutter support and is coated with glass wool to form a roof waterproof layer, the top surface of the roof waterproof layer is flush with the top edge of the inner gutter support, the roof panel is laid on the top edges of the roof waterproof layer and the inner gutter support, the outer side edge of the roof panel extends out of the top edge of the inner gutter support to the lower side of the top edge of the outer gutter support, the roof panel and the top edge of the inner gutter support are fastened through screws, waterproof rubber strips are padded between the roof panel and the roof waterproof layer and are arranged in parallel in a mode that the intervals are equal, the top edge of the metal curtain wall is turned inwards to form a cornice edge sealing edge, and the cornice edge sealing edge and the top edge of the outer gutter support are fastened through screws.
The drainage device for the fan-shaped metal roof is characterized in that:
the roof steel beam is made of I-shaped steel,
the thickness of the heat preservation rock wool layer is not less than 100mm,
the metal curtain wall and the cornice edge sealing are both made of aluminum plates with the thickness not less than 3mm,
the gutter bracket is made by bending a galvanized steel sheet with the thickness not less than 2.5mm,
the thickness of a waterproof layer formed by the inner side walls of the two gutter brackets, which are positioned at the lower part of the horizontal right-angle edge of the gutter underframe and the horizontal right angle of the gutter underframe, is not less than 50mm,
the gutter is made of 304 stainless steel with the thickness not less than 2.5mm by bending.
The manufacturing method of the drainage device for the fan-shaped metal roof is characterized by comprising the following steps of: the method is implemented in sequence according to the following steps:
firstly, top laying and covering: the suspended ceiling is laid on the roof steel beams, the suspended ceiling and each roof steel beam are fastened by screws, an outer wall is pasted on the outer vertical surface of each roof steel beam, a heat-preservation rock wool layer is pasted on the outer wall, and a metal curtain wall is pasted on the heat-preservation rock wool layer;
secondly, arranging a gutter: the gutter brackets are Z-shaped, the lower bottom edges of the two gutter brackets are adhered and covered and fixed on the top surface of the suspended ceiling by screws, one gutter bracket is arranged adjacent to the inner wall of the outer wall, the other gutter bracket is arranged on the inner side of the outer wall, so that the top edges of the two gutter brackets are arranged oppositely, the height of the top edge of the gutter support at the outer side is higher than that of the top edge of the gutter support at the inner side, a right-angle gutter underframe is respectively arranged at the bottom of the gutter support, the vertical right-angle edge of the gutter underframe is attached and fixed at the bottom of the inner side wall of the gutter support, a space is reserved between the horizontal right-angle edge of the gutter underframe and the top surface of the suspended ceiling, the upper parts of the horizontal right-angle edges of the two gutter support inner side walls of the gutter supports and the horizontal right-angle edge of the gutter underframe form a gutter groove, and the lower parts of the horizontal right-angle edges of the gutter supports and the horizontal right-angle edge of the gutter underframe form a waterproof layer;
embedding the gutter into the gutter groove in an opening-up manner, enabling the outer side walls of the two gutters to be respectively attached to the inner side wall and the middle part of one gutter bracket, enabling the two sides of the bottom edge of the gutter to be respectively attached to the horizontal right-angle side of the bottom frame of the gutter, and filling glass wool into the waterproof layer;
thirdly, laying a roof: the roof waterproof layer is formed by pasting glass wool on one side, located on the inner side gutter support, of the ceiling top surface, the top surface of the roof waterproof layer is flush with the top edge of the inner side gutter support, the roof panel is laid on the top edges of the roof waterproof layer and the inner side gutter support, the outer side edge of the roof panel extends out of the top edge of the inner side gutter support to the lower side of the top edge of the outer side gutter support, the roof panel and the top edge of the inner side gutter support are fastened through screws, waterproof rubber strips are padded between the roof panel and the roof waterproof layer and arranged in parallel in a mode that the distances are equal, the top edge of the metal curtain wall is turned inwards to form a cornice sealing edge, and the cornice sealing edge and the top edge of the outer side gutter support are.
The manufacturing method of the drainage device for the fan-shaped metal roof is characterized by comprising the following steps of:
firstly, the roof steel beam is made of I-shaped steel,
the thickness of the heat preservation rock wool layer is not less than 100mm,
the metal curtain wall is made of aluminum plates with the thickness not less than 3 mm;
in the second step, the gutter bracket is made by bending a galvanized steel sheet with the thickness not less than 2.5mm,
the thickness of a waterproof layer formed by the inner side walls of the two gutter brackets, which are positioned at the lower part of the horizontal right-angle edge of the gutter underframe and the horizontal right angle of the gutter underframe, is not less than 50mm,
the gutter is made of 304 stainless steel with the thickness not less than 2.5mm by bending;
and step three, selecting an aluminum plate with the thickness not less than 3mm for edge sealing of the cornice.
The utility model discloses guaranteeing under the condition of whole room lid metal roof boarding rule of arranging, the form that sets up the blind gutter along peripheral inboard carries out the emission of rainwater, and the gutter setting is on intermediate lamella upper portion, highly is the interval of panel and intermediate lamella, and the width is confirmed according to the design.
The utility model is simple in operation, general site worker just can process the installation and use, and convenient construction makes the appearance quality after the installation of whole metal roofing is accomplished better, has solved fan-shaped metal roofing structure and has not considered to set up the gutter and arouse the unable organized drainage problem of metal roof boarding, but solves the hidden danger problem of the roof rainwater drainage and the roof percolating water in later stage.
The utility model discloses following beneficial effect has:
1. the roof gutter is simple to manufacture and is formed at one time, and the conditions of gutter arrangement do not need to be considered independently during structural design.
2. The installation is simple, and maneuverability is strong, and is pleasing to the eye practical.
3. Is beneficial to the drainage organization of the irregular roof.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a partially enlarged view of the area a in fig. 1.
Detailed Description
The invention is further illustrated by the following specific examples.
Example 1
A drainage device for a fan-shaped metal roof comprises a roof steel beam 11, a suspended ceiling 12, an outer wall 13, a heat-preservation rock wool layer 14, a metal curtain wall 15, a cornice edge sealing edge 16, a gutter bracket 21, a gutter underframe 22, a gutter 23, glass wool 24, a roof waterproof layer 25, a roof panel 26 and a waterproof rubber strip 27, and as shown in figures 1 and 2, the drainage device has the following specific structure:
the suspended ceiling 12 is laid on the roof steel beams 11, the suspended ceiling 12 and each roof steel beam 11 are fastened by screws, the outer wall 13 is pasted on the outer vertical surface of the roof steel beam 11, the heat preservation rock wool layer 14 is pasted on the outer wall 13, and the metal curtain wall 15 is pasted on the heat preservation rock wool layer 14;
the gutter brackets 21 are Z-shaped, two gutter brackets 21 are adhered to the lower bottom edges and fixed on the top surface of the suspended ceiling 12 by screws, one gutter bracket 21 is arranged adjacent to the inner wall of the outer wall 13, the other gutter bracket 21 is arranged on the inner side of the outer wall 13, the top edges of the two gutter brackets 21 are arranged oppositely, the height of the top edge of the gutter support 21 on the outer side is higher than that of the top edge of the gutter support 21 on the inner side, a right-angle gutter underframe 22 is arranged at the bottom of each gutter support 21, the vertical right-angle edge of each gutter underframe 22 is attached and fixed to the bottom of the inner side wall of each gutter support 21, a space is reserved between the horizontal right-angle edge of each gutter underframe 22 and the top surface of the ceiling 12, the inner side walls of the two gutter supports 21 are positioned at the upper parts of the horizontal right-angle edges of the gutter underframe 22 and form a gutter groove with the horizontal right-angle structure of the gutter underframe 22, and the inner side walls of the two gutter supports 21 are positioned at the lower parts of the horizontal right-angle edges of the gutter underframe 22 and form a waterproof layer with the horizontal;
the gutter 23 is embedded into the gutter groove in an opening-up mode, the outer side walls of the two gutters 23 are respectively attached to the inner side wall and the middle part of one gutter bracket 21, the two sides of the bottom edge of the gutter 23 are respectively attached to the horizontal right-angle side of one gutter underframe 22, and the waterproof layer is filled with glass wool 24;
the top surface of the suspended ceiling 12 is positioned on one side of the inner gutter support 21 and is coated with glass wool 24 to form a roof waterproof layer 25, the top surface of the roof waterproof layer 25 is flush with the top edge of the inner gutter support 21, an roof panel 26 is laid on the top edges of the roof waterproof layer 25 and the inner gutter support 21, the outer side edge of the roof panel 26 extends out of the top edge of the inner gutter support 21 to the lower side of the top edge of the outer gutter support 21, the roof panel 26 and the top edge of the inner gutter support 21 are fastened by screws, waterproof rubber strips 27 are padded between the roof panel 26 and the roof waterproof layer 25, the waterproof rubber strips 27 are arranged in parallel in an equal-interval mode, the top edge of the metal curtain wall 15 is turned inwards to form an eave edge sealing 16, and the eave edge sealing 16 and the top edge of the outer gutter support 21 are.
In this embodiment:
the roof girder 11 is made of i-shaped steel,
the thickness of the heat preservation rock wool layer 14 is not less than 100mm,
the metal curtain wall 15 and the cornice edge banding 16 both adopt aluminum plates with the thickness not less than 3mm,
the gutter bracket 21 is made by bending a galvanized steel sheet with the thickness not less than 2.5mm,
the thickness of a waterproof layer formed by the inner side walls of the two gutter brackets 21, which are positioned at the lower part of the horizontal right-angle side of the gutter underframe 22 and the horizontal right-angle side of the gutter underframe 22, is not less than 50mm,
the gutter 23 is made of 304 stainless steel with the thickness not less than 2.5mm by bending.
In this example, the following steps were performed in sequence:
firstly, top laying and covering: a suspended ceiling 12 is laid on the roof steel beams 11, the suspended ceiling 12 is fastened with each roof steel beam 11 by screws, an outer wall 13 is pasted on the outer vertical surface of the roof steel beam 11, a heat preservation rock wool layer 14 is pasted on the outer wall 13, a metal curtain wall 15 is pasted on the heat preservation rock wool layer 14,
the roof steel beam 11 is made of I-shaped steel, the thickness of the heat-preservation rock wool layer 14 is not less than 100mm, and the metal curtain wall 15 is made of aluminum plates with the thickness of not less than 3 mm;
secondly, arranging a gutter: the gutter brackets 21 are Z-shaped, two gutter brackets 21 are adhered to the lower bottom edges and fixed on the top surface of the suspended ceiling 12 by screws, one gutter bracket 21 is arranged adjacent to the inner wall of the outer wall 13, the other gutter bracket 21 is arranged on the inner side of the outer wall 13, so that the top edges of the two gutter brackets 21 are arranged oppositely, the height of the top edge of the gutter support 21 on the outer side is higher than that of the top edge of the gutter support 21 on the inner side, a right-angle gutter underframe 22 is arranged at the bottom of each gutter support 21, the vertical right-angle edge of each gutter underframe 22 is attached and fixed to the bottom of the inner side wall of each gutter support 21, a space is reserved between the horizontal right-angle edge of each gutter underframe 22 and the top surface of the ceiling 12, the inner side walls of the two gutter supports 21 are positioned at the upper parts of the horizontal right-angle edges of the gutter underframe 22 and form a gutter groove with the horizontal right-angle structure of the gutter underframe 22, and the inner side walls of the two gutter supports 21 are positioned at the lower parts of the horizontal right-angle edges of the gutter underframe 22 and form a waterproof layer with the horizontal;
embedding the gutter 23 into the gutter groove in an opening-up manner, respectively attaching the outer side walls of the two gutters 23 to the inner side wall and the middle of one gutter bracket 21, respectively attaching the two sides of the bottom edge of the gutter 23 to the horizontal right-angle side of one gutter underframe 22, and filling glass wool 24 in the waterproof layer;
the gutter brackets 21 are made by bending galvanized steel plates with the thickness of not less than 2.5mm, the thickness of a waterproof layer formed by the inner side walls of the two gutter brackets 21, which are positioned at the lower parts of the horizontal right-angle sides of the gutter underframe 22 and the horizontal right angle of the gutter underframe 22, is not less than 50mm, and the gutter 23 is made by bending 304 stainless steel with the thickness of not less than 2.5 mm;
thirdly, laying a roof: glass wool 24 is adhered to one side, located on the inner side gutter support 21, of the top surface of the suspended ceiling 12 to form a roof waterproof layer 25, the top surface of the roof waterproof layer 25 is flush with the top edge of the inner side gutter support 21, an roof panel 26 is laid on the top edges of the roof waterproof layer 25 and the inner side gutter support 21, the outer side edge of the roof panel 26 extends out of the top edge of the inner side gutter support 21 to be below the top edge of the outer side gutter support 21, the roof panel 26 and the top edge of the inner side gutter support 21 are fastened through screws, waterproof rubber strips 27 are padded between the roof panel 26 and the roof waterproof layer 25, the waterproof rubber strips 27 are arranged in parallel in an equal-interval mode, the top edge of the metal curtain wall 15 is turned inwards to form an eave edge sealing 16, and the eave edge sealing 16 and the top edge of the outer side;
the cornice edge banding 16 is made of an aluminum plate with the thickness not less than 3 mm.
Claims (2)
1. A drainage device for a fan-shaped metal roof comprises a roof steel beam (11), a suspended ceiling (12), an outer wall (13), a heat-insulating rock wool layer (14) and a metal curtain wall (15), wherein the suspended ceiling (12) is laid on the roof steel beam (11), the suspended ceiling (12) and each roof steel beam (11) are fastened by screws, the outer wall (13) is pasted on the outer vertical surface of the roof steel beam (11), the heat-insulating rock wool layer (14) is pasted on the outer wall (13), the metal curtain wall (15) is pasted on the heat-insulating rock wool layer (14),
the method is characterized in that: also comprises a cornice sealing edge (16), a gutter bracket (21), a gutter underframe (22), a gutter (23), glass wool (24), a roof waterproof layer (25), an roof panel (26) and a waterproof adhesive tape (27),
the gutter brackets (21) are Z-shaped, two gutter brackets (21) are attached to the lower bottom edges and are fixed on the top surface of the suspended ceiling (12) by screws, one gutter bracket (21) is adjacent to the inner wall of the outer wall (13), the other gutter bracket (21) is arranged on the inner side of the outer wall (13), the top edges of the two gutter brackets (21) are oppositely arranged, the top edge of the gutter bracket (21) on the outer side is higher than the top edge of the gutter bracket (21) on the inner side, the bottom of the gutter bracket (21) is respectively provided with a right-angled gutter chassis (22), the vertical right-angled edges of the gutter chassis (22) are attached to and fixed at the bottom of the inner side wall of the gutter bracket (21), a space is reserved between the horizontal right-angled edge of the gutter chassis (22) and the top surface of the suspended ceiling (12), the upper parts of the inner side walls of the two gutter brackets (21) positioned on the horizontal right-angled edges of the gutter chassis (22) and the horizontal right-angled edges of the gutter chassis (22) form a, the inner side walls of the two gutter brackets (21) are positioned at the lower parts of the horizontal right-angle sides of the gutter underframe (22) and form a waterproof layer with the horizontal right-angle of the gutter underframe (22);
the gutter (23) is embedded into the gutter groove in an upward opening mode, the outer side walls of the two gutters (23) are respectively attached to the inner side wall and the middle of one gutter bracket (21), the two sides of the bottom edge of the gutter (23) are respectively attached to the horizontal right-angle side of one gutter underframe (22), and the waterproof layer is filled with glass wool (24);
the top surface of the suspended ceiling (12) is positioned on one side of the inner side gutter support (21) and is coated with glass wool (24) to form a roof waterproof layer (25), the top surface of the roof waterproof layer (25) is flush with the top edge of the inner side gutter support (21), a roof panel (26) is laid on the roof waterproof layer (25) and the top edge of the inner side gutter support (21), and the outside limit of roof boarding (26) stretches out the top edge of inboard gutter support (21) to the below of outside gutter support (21) top edge, fasten with the screw between the top edge of roof boarding (26) and inboard gutter support (21), it has waterproof adhesive tape (27) to fill up between roof boarding (26) and roof waterproof layer (25), each waterproof adhesive tape (27) are with the mode parallel arrangement of the interval equals each other, the top edge of metal curtain wall (15) is inwards turned over and is formed eaves mouth banding (16), eaves mouth banding (16) and the top edge of outside gutter support (21) are fastened with the screw.
2. A drainage facility for sectorial metal roofing as claimed in claim 1 wherein:
the roof steel beam (11) is made of I-shaped steel,
the thickness of the heat preservation rock wool layer (14) is not less than 100mm,
the metal curtain wall (15) and the cornice sealing edge (16) both adopt aluminum plates with the thickness not less than 3mm,
the gutter bracket (21) is made by bending a galvanized steel sheet with the thickness not less than 2.5mm,
the thickness of a waterproof layer formed by the inner side walls of the two gutter brackets (21) positioned at the lower part of the horizontal right-angle side of the gutter underframe (22) and the horizontal right angle of the gutter underframe (22) is not less than 50mm,
the gutter (23) is made of 304 stainless steel with the thickness not less than 2.5mm by bending.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922081575.1U CN211473114U (en) | 2019-11-27 | 2019-11-27 | Drainage device for fan-shaped metal roof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922081575.1U CN211473114U (en) | 2019-11-27 | 2019-11-27 | Drainage device for fan-shaped metal roof |
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| Publication Number | Publication Date |
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| CN211473114U true CN211473114U (en) | 2020-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922081575.1U Active CN211473114U (en) | 2019-11-27 | 2019-11-27 | Drainage device for fan-shaped metal roof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113944263A (en) * | 2021-09-26 | 2022-01-18 | 上海宝冶集团有限公司 | Outer wall waterproof structure for gap between top of curtain wall and roof steel beam and construction method of outer wall waterproof structure |
-
2019
- 2019-11-27 CN CN201922081575.1U patent/CN211473114U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113944263A (en) * | 2021-09-26 | 2022-01-18 | 上海宝冶集团有限公司 | Outer wall waterproof structure for gap between top of curtain wall and roof steel beam and construction method of outer wall waterproof structure |
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