CN108442678A - Slope roof type skin repair crosshead and its construction method - Google Patents
Slope roof type skin repair crosshead and its construction method Download PDFInfo
- Publication number
- CN108442678A CN108442678A CN201810406677.3A CN201810406677A CN108442678A CN 108442678 A CN108442678 A CN 108442678A CN 201810406677 A CN201810406677 A CN 201810406677A CN 108442678 A CN108442678 A CN 108442678A
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- China
- Prior art keywords
- channel steels
- crosshead
- scaffold
- roof type
- channel
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
- E04G3/18—Scaffolds essentially supported by building constructions, e.g. adjustable in height supported by cantilevers or other provisions mounted in openings in the building, e.g. window openings
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/04—Means for fastening, supporting, or bracing scaffolds on or against building constructions
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses slope roof type skin repair crosshead and its construction methods.The crosshead at least two is used cooperatively, each crosshead includes two groups of bracing members being fixed on flooring and the crosshead horizontal support mechanism being arranged on bracing members, crosshead horizontal support mechanism includes 20# channel steels, 18# channel steels and 16# channel steels, 18# channel steels one end is fixed after being socketed with 20# channel steels one end by screw bolt and nut, the 18# channel steels other end is bolted after being socketed with 16# channel steels one end, 20# channel steel other ends bottom surface, 18# channel steels are separately fixed at close to 16# channel steels one end bottom surface on bracing members, 16# channel steel other ends upper surface is equipped with 2 connecting poles, steel pipe scaffold workbench is mounted on by connecting pole on 16# channel steels, the bracing members bottom being connect with 20# channel steels is equipped with load-bearing material, 20# channel steel other ends end is fixed on by steel wire rope in load-bearing material.The present invention is used for slope surface external wall construction using structure, and using flexible is strong, and the crosshead is simple in structure, easy for installation, safety coefficient is higher.
Description
Technical field
The invention belongs to technical field of building construction, and in particular to a kind of slope roof type skin repair crosshead
And its method for maintaining.
Background technology
When high-rise Mediterranean formula pitched roof skin repair, generally use console mode scaffold builds steel pipe scaffold
Workbench, operating personnel construct at station on steel pipe scaffold workbench, and due to high-rise story height, scaffold builds expense
Height, and there are severe compromises；And nacelle construction is used, since the gradient of pitched roof is larger, hanging basket counterweight places difficulty, and
And be not easy to touch exterior wall, on the other hand there is also prodigious security risks.
Invention content
For the above-mentioned problems in the prior art, the purpose of the present invention is to provide a kind of easy to operate, safety systems
Number height, slope roof type skin repair crosshead and its method for maintaining easy to use.
The slope roof type skin repair crosshead, at least two crossheads are used cooperatively, each to operate
Frame includes two groups of bracing members being fixed on flooring and the crosshead horizontal support mechanism being arranged on bracing members, it is characterised in that behaviour
Zuo Jia horizontal supports mechanism includes 20# channel steels, 18# channel steels and 16# channel steels, 18# channel steels one end with after the socket of 20# channel steels one end by spiral shell
Bolt is fixed, and the 18# channel steels other end is fixed after being socketed with 16# channel steels one end by screw bolt and nut, 20# channel steel other ends bottom surface, 18#
Channel steel is separately fixed at close to 16# channel steels one end bottom surface on bracing members, and 16# channel steel other ends upper surface is equipped with 2 connecting poles, steel
Pin hand cradle workbench is mounted on by connecting pole on the 16# channel steels of two or more crossheads, is connect with 20# channel steels
Bracing members bottom be equipped with load-bearing material, 20# channel steel other ends end is fixed on by steel wire rope in load-bearing material.
The slope roof type skin repair crosshead, it is characterised in that bracing members include bottom plate, top panel
And the cross support column of connecting bottom board, top panel, cross support column are to be inclined between bottom plate and top panel.
The slope roof type skin repair crosshead, it is characterised in that top panel is square structure, 18# slots
Steel, 20# channel steels are installed by the diagonal line of top panel.
The slope roof type skin repair crosshead, it is characterised in that 20# channel steels, 18# channel steels and 16# slots
The end of steel is spaced several mounting holes of setting.
The slope roof type skin repair crosshead, it is characterised in that steel pipe scaffold workbench include with
The identical scaffold upright rod of operation console number, scaffold upright rod is socketed on connecting pole to be connect with 16# channel steels, scaffold upright rod it
Between be equipped with scaffold cross bar, several parallel small cross bars are equipped between scaffold cross bar, foot is equipped between two neighboring 16# channel steels
Hand cradle cross bar and small cross bar.
The slope roof type skin repair crosshead, it is characterised in that 20# channel steel other ends end is equipped with
Two bar dowels, steel wire rope are located between two bar dowels.
The slope roof type skin repair crosshead, it is characterised in that crosshead weight and construction loads weight
The weight ratio for measuring summation and load-bearing material is 1：2-3 times.
The slope roof type skin repair crosshead, it is characterised in that set on the outside of steel pipe scaffold workbench
Set guard rail.
A kind of slope roof type skin maintenance construction method is used based on the repair of slope roof type skin
Crosshead, it is characterised in that include the following steps：
1）The component of repair crosshead is transported to attic floor, the furniture etc. in required room is moved away from, de-glazing,
It properly protects measure to the article, furniture and window frame that cannot move out, it is ensured that house is not damaged in the construction process；
2）The installation of slope roof type skin repair crosshead, two crossheads are installed in parallel in the same window frame or not
The installation process of same window frame, crosshead is as follows：Two groups of bracing members are placed on to the corresponding position of flooring, respectively by 20# channel steels with
18# channel steels are diagonally mounted on the top panel of corresponding bracing members, further according to actual requirement by 20# channel steels and 18# slots
Steel end connects, 16# channel steels one end is mounted on to the other end end of 18# channel steels, connect in 20# channel steels and with 20# channel steels
Load-bearing material is arranged in bracing members bottom；
3）Steel pipe scaffold workbench is installed respectively on the connecting pole of the 16# channel steel other ends of two crossheads, is laid with foot hand
Plate, guard rail is arranged in steel pipe scaffold workbench outside, while security area being arranged downstairs；
4）Operator fastens seat belts, and stands and carries out exterior wall maintenance construction on steel pipe scaffold workbench, after construction
Outrigger is removed in time, restores exterior window and indoor furniture etc. in time.
The present invention is by using above-mentioned technology, and compared with prior art, advantage is as follows：
1）The present invention is by using above structure, obtained detachable slope roof type skin repair crosshead, slot
Connection between steel, the length and angle that can be suitble to according to actual selection, using flexible is strong, the crosshead structure letter
It is single, it is easy for installation；
2）The present invention can be used for planar walls or band turn by using crosshead for being repaired to Domatic building and exterior wall
The repair of angle metope, easy to operate, using flexible, safety coefficient are higher.
Description of the drawings
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the overlooking structure diagram of the present invention；
Fig. 3 is the structural schematic diagram of the embodiment of the present invention；
Fig. 4 is another embodiment of the present invention structural schematic diagram.
In figure：1- floorings, 2- bracing members, 21- bottom plates, 22-- cross support columns, 23- top panels, 3-16# channel steels, 4-
Connecting pole, 5- bolts, 6- nuts, 7-18# channel steels, 8-20# channel steels, 9- load-bearing materials, 10- steel wire ropes, 11- scaffold upright rods, 12-
Scaffold cross bar, the small cross bars of 13-, 14- bar dowels, 15- exterior walls, 16- steel plates, 17- expansion bolts, 18- drawknot steel wire ropes.
Specific implementation mode
Below in conjunction with Figure of description, the invention will be further described, but protection scope of the present invention is not limited in
This：
As depicted in figs. 1 and 2, slope roof type skin repair crosshead of the invention, at least two are used cooperatively, and
The 16# channel steels 3 of two or more crossheads can also be placed in different with arranged parallel on the same window frame
On window frame, the crosshead includes that two groups of bracing members 2 being fixed on flooring 1 and the crosshead being arranged on bracing members 2 are horizontal
Supporting mechanism, bracing members 2 and crosshead horizontal support mechanism are referred to as cantilever bearing, and crosshead horizontal support mechanism includes 20# channel steels
8,18# channel steels 7 and 16# channel steels 3,7 one end of 18# channel steels are fixed after being socketed with 8 one end of 20# channel steels by bolt 5, and 18# channel steels 7 are another
End is fixed after being socketed with 3 one end of 16# channel steels by bolt 5, and 8 other end bottom surface of 20# channel steels, 18# channel steels 7 are close to 3 one end of 16# channel steels
Bottom surface is separately fixed on bracing members 2, and 3 other end upper surface of 16# channel steels is equipped with 2 connecting poles 4, and steel pipe scaffold workbench is logical
Connecting pole 4 is crossed on the 16# channel steels 3 of each crosshead, 2 bottom of bracing members being connect with 20# channel steels 8 is equipped with load-bearing material 9,
8 other end end of 20# channel steels is fixed on by steel wire rope 10 in load-bearing material 9.
The present invention is spaced in the end of 20# channel steels 8,18# channel steels 7 and 16# channel steels 3 and sets to improve its use scope
Several mounting holes are set, can be connected two channel steel ends corresponding aperture position by bolt 5 and nut 6 according to practice of construction needs.
As shown, the present invention bracing members 2 include bottom plate 21, top panel 23 and connecting bottom board 21, top panel 23 ten
Font support column 22, cross support column 22 are to be inclined between bottom plate 21 and top panel 23, and top panel 23 is rectangular
Structure, 18# channel steels 7,20# channel steels 8 are installed by the diagonal line of top panel 23, improve its forced area, increase the steady of crosshead
Qualitative and safety.
The platform that conventional scaffold is built may be used in the steel pipe scaffold workbench of the present invention, can also be other classes
As steel pipe scaffold workbench, the steel pipe scaffold workbench in the embodiment of the present invention includes foot identical with operation console number
Hand cradle upright bar 11, scaffold upright rod 11 are socketed on connecting pole 4 and are connect with the 16# channel steels 3 of each operation console, scaffold upright rod 11
Between set there are two scaffold cross bar 12, connected, be equipped between two scaffold cross bars 12 several flat by scaffold cross bar 12
Capable small cross bar 13, it is equipped with scaffold cross bar 12 and small cross bar 13 between two neighboring 16# channel steels 3, stands for construction personnel
It is vertical；In order to improve safety, the present invention is equipped with guard rail in 12 periphery of scaffold cross bar.
Since the building having is irregular, it is understood that there may be corner etc., if building corner is also required to crosshead, by
Generally be not provided with exterior window in corner, it is therefore desirable to when 18# channel steels are connect with 16# channel steels, constitute respective angles, angle with
Building corner size matches, and is on the corner implanted into wall using steel wire rope on 16# channel steels or is fixed on roofing and drawn
Knot can use steel wire rope two channel steel junctions when drawknot, socket a little depending on specific location.If encountering metope corner
Or corner nearby needs repairing, the 16# channel steels 3 of two or more crossheads can be mounted on different corners by the present invention
On the window frame of two face wall of place, as shown in Figure 3 and Figure 4, if corner and window are close, two operation consoles are directly placed on two
Corresponding scaffold cross bar 12 and in parallel is arranged on each scaffold upright rod 11 on nearest window frame in face wall body
Small cross bar 13, scaffold cross bar 12 and small cross bar 13 on the corner intersect, and add drawknot steel wire rope 18 in infall,
It is further reinforced, then is constructed；If the window frame on the wall of two sides apart from corner farther out, in order to improve safety, the present invention
The 16# channel steels 3 of reinforcing are added in scaffold cross bar 12 and 13 bottom of small cross bar, the connection type of the 16# channel steels 3 is as follows：First
By on the metope of 16# channel steels 3 to be installed, the lime etc. of wall face layer is rooted out, then fixed steel plate 16 by expansion bolt 17
On wall, then 16# channel steels 3 are mounted on steel plate 16, in order to further increase its security performance, the present invention is in steel
It is equipped with inclined support bar between 16 bottom of plate and wall, after construction, the lime face rooted out layer is filled.
Since the present invention is in maintenance operation, crosshead is located on flooring, and flooring is likely to be resident family's family,
In order not to destroy floor, and it can guarantee its safety in utilization, biology 9 is held in setting to the present invention in 2 bottom of bracing members, while in 20#
8 other end end of channel steel is equipped with two bar dowels 14, and steel wire rope 10 is located between two bar dowels 14, and the connection of steel wire rope 10 is held
Weight 9；The weight ratio of crosshead weight of the present invention and construction loads weight summation and load-bearing material 9 is 1：2-3 times.
Since all components of crosshead of the present invention will be removed to high level, for convenient in carrying, component can be into elevator, this hair
The bright requirement that meet lift car to each accessory specification of crosshead, i.e., be generally not to be exceeded 2 meters.
As shown, a kind of slope roof type skin maintenance construction method of the present invention, is built based on slope roof type
Beyond the region of objective existence wall repair crosshead, includes the following steps：
1）The component of repair crosshead is transported to attic floor, the furniture etc. in required room is moved away from, de-glazing,
It properly protects measure to the article, furniture and window frame that cannot move out, it is ensured that house is not damaged in the construction process；
2) installation of slope roof type skin repair crosshead, two crossheads be installed in parallel in the same window frame or
The installation process of different window frames, crosshead is as follows：Two groups of bracing members 2 are placed on to the corresponding position of flooring, respectively by 20# channel steels
8 are diagonally mounted on the top panel 23 of corresponding bracing members 2 with 18# channel steels 7, further according to actual requirement by 20# channel steels 8
It is connect with 7 end of 18# channel steels, 3 one end of 16# channel steels is mounted on to the other end end of 18# channel steels 7, in 20# channel steels 8 and and 20#
Load-bearing material 9 is arranged in 2 bottom of bracing members that channel steel 8 connects；
3) steel pipe scaffold workbench, steel pipe feet are installed respectively on the connecting pole 4 of 3 other end of 16# channel steels of two crossheads
Hand cradle workbench is installed according to actual conditions, is needed repairing near metope corner or corner if encountered, the present invention can be by two
Where the 16# channel steels 3 of a or more than two crossheads are mounted on different corners on the window frame of two face walls, such as Fig. 3 and Fig. 4 institutes
Show, if corner and window are close, two operation consoles is directly placed on two sides wall on nearest window frame, and each
Corresponding scaffold cross bar 12 and small cross bar 13 in parallel, scaffold cross bar 12 and small cross bar are set on scaffold upright rod 11
13 on the corner intersect, and add drawknot steel wire rope 18 in infall, are further reinforced to it, then construct；If two face walls
Farther out apart from corner, in order to improve safety, the present invention adds window frame on body in scaffold cross bar 12 and 13 bottom of small cross bar
If the 16# channel steels 3 of reinforcing, the connection type of the 16# channel steels 3 are as follows：First by the metope of 16# channel steels 3 to be installed, by wall
The lime etc. of face layer is rooted out, then is fixed on the wall steel plate 16 by expansion bolt 17, and 16# channel steels 3 are then mounted on steel
On plate 16, it is laid with scaffold board in scaffold cross bar 12 and small cross bar 13, protective fence is set on the outside of steel pipe scaffold workbench
Bar, while security area is set downstairs；
4) operator fastens seat belts, and stands and carries out exterior wall maintenance construction on steel pipe scaffold workbench, after construction
Outrigger is removed in time, restores exterior window and indoor furniture in time, and the lime face rooted out layer is filled.
Claims (9)
1. slope roof type skin repair crosshead, at least two crossheads are used cooperatively, each crosshead includes solid
Two groups of bracing members being scheduled on flooring（2）And it is arranged in bracing members（2）On crosshead horizontal support mechanism, it is characterised in that operation
Frame horizontal support mechanism includes 20# channel steels（8）, 18# channel steels（7）And 16# channel steels（3）, 18# channel steels（7）One end and 20# channel steels（8）
By bolt after the socket of one end（5）It is fixed, 18# channel steels（7）The other end and 16# channel steels（3）By bolt after the socket of one end（5）And nut
（6）It is fixed, 20# channel steels（8）Other end bottom surface, 18# channel steels（7）Close to 16# channel steels（3）One end bottom surface is separately fixed at bracing members
（2）On, 16# channel steels（3）Other end upper surface is equipped with 2 connecting poles（4）, steel pipe scaffold workbench passes through connecting pole（4）Peace
Mounted in the 16# channel steels of two or more crossheads（3）On, with 20# channel steels（8）The bracing members of connection（2）Bottom is equipped with
Load-bearing material（9）, 20# channel steels（8）Other end end passes through steel wire rope（10）It is fixed on load-bearing material（9）On.
2. slope roof type skin repair crosshead according to claim 1, it is characterised in that bracing members（2）Packet
Include bottom plate（21）, top panel（23）And connecting bottom board（21）, top panel（23）Cross support column（22）, cross support column
（22）To be inclined at bottom plate（21）With top panel（23）Between.
3. slope roof type skin repair crosshead according to claim 2, it is characterised in that top panel（23）
For square structure, 18# channel steels（7）, 20# channel steels（8）Pass through top panel（23）Diagonal line installation.
4. slope roof type skin repair crosshead according to claim 1, it is characterised in that 20# channel steels（8）、
18# channel steels（7）And 16# channel steels（3）End be spaced several mounting holes of setting.
5. according to any slope roof type skin repair crossheads of claim 1-4, it is characterised in that steel pipe
Scaffold workbench includes scaffold upright rod identical with operation console number（11）, scaffold upright rod（11）It is socketed in connecting pole
（4）Upper and 16# channel steels（3）Connection, scaffold upright rod（11）Between be equipped with scaffold cross bar（12）, scaffold cross bar（12）Between
Equipped with several parallel small cross bars（13）, two neighboring 16# channel steels（3）Between be equipped with scaffold cross bar（12）And small cross bar
（13）.
6. according to any slope roof type skin repair crossheads of claim 1-4, it is characterised in that 20# slots
Steel（8）Other end end is equipped with two bar dowels（14）, steel wire rope（10）Positioned at two bar dowels（14）Between.
7. according to any slope roof type skin repair crossheads of claim 1-4, it is characterised in that operation
Frame weight and construction loads weight summation and load-bearing material（9）Weight ratio be 1：2-3 times.
8. according to any slope roof type skin repair crossheads of claim 1-4, it is characterised in that steel pipe
Guard rail is set on the outside of scaffold workbench.
9. a kind of slope roof type skin maintenance construction method is based on slope roof type skin repair crosshead,
It is characterized by comprising following steps：
1）The component of repair crosshead is transported to attic floor, the furniture etc. in required room is moved away from, de-glazing,
It properly protects measure to the article, furniture and window frame that cannot move out, it is ensured that house is not damaged in the construction process；
2）The installation of slope roof type skin repair crosshead, two crossheads are installed in parallel in the same window frame or not
The installation process of same window frame, crosshead is as follows：By two groups of bracing members（2）It is placed on the corresponding position of flooring, respectively by 20# channel steels
（8）With 18# channel steels（7）Diagonally it is mounted on corresponding bracing members（2）Top panel（23）On, it will further according to actual requirement
20# channel steels（8）With 18# channel steels（7）End connects, by 16# channel steels（3）One end is mounted on 18# channel steels（7）Other end end,
In 20# channel steels（8）With with 20# channel steels（8）The bracing members of connection（2）Load-bearing material is arranged in bottom（9）；
3）In the 16# channel steels of two crossheads（3）The connecting pole of the other end（4）It is upper that steel pipe scaffold workbench, paving are installed respectively
If scaffold board, guard rail is set, while security area being arranged downstairs on the outside of steel pipe scaffold workbench；
4）Operator fastens seat belts, and stands and carries out exterior wall maintenance construction on steel pipe scaffold workbench, after construction
Outrigger is removed in time, restores exterior window and indoor furniture etc. in time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810406677.3A CN108442678A (en) | 2018-05-01 | 2018-05-01 | Slope roof type skin repair crosshead and its construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810406677.3A CN108442678A (en) | 2018-05-01 | 2018-05-01 | Slope roof type skin repair crosshead and its construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108442678A true CN108442678A (en) | 2018-08-24 |
Family
ID=63202041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810406677.3A Pending CN108442678A (en) | 2018-05-01 | 2018-05-01 | Slope roof type skin repair crosshead and its construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108442678A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113550550A (en) * | 2021-06-30 | 2021-10-26 | 重庆建工第三建设有限责任公司 | Overhanging unit type scaffold convenient to assemble and disassemble |
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| JP2013113069A (en) * | 2011-11-30 | 2013-06-10 | Kawamori Sangyo Kk | Suspended scaffold |
| CN203499226U (en) * | 2012-12-18 | 2014-03-26 | 中国建筑第八工程局有限公司 | Binding beam type steel cantilever scaffold |
| CN204456808U (en) * | 2014-12-18 | 2015-07-08 | 中国建筑第八工程局有限公司 | Assembly type overhanging unloading platform |
| CN205036063U (en) * | 2015-08-18 | 2016-02-17 | 中国建筑第二工程局有限公司 | A operation platform that encorbelments for building inside is encorbelmented position and is under construction |
| CN205804911U (en) * | 2016-06-03 | 2016-12-14 | 浙江省建工集团有限责任公司 | A kind of builder's jack |
| CN206233537U (en) * | 2016-12-07 | 2017-06-09 | 中国建筑第八工程局有限公司 | Suspension scaffold for setting up scaffold in prefabricated construction |
| CN208220163U (en) * | 2018-05-01 | 2018-12-11 | 浙江绿城房屋服务系统有限公司 | Crosshead is used in the maintenance of slope roof type exterior walls of buildings |
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- 2018-05-01 CN CN201810406677.3A patent/CN108442678A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101736893A (en) * | 2009-12-16 | 2010-06-16 | 通广建工集团有限公司 | Overhanging type scaffold supporting system |
| JP2013113069A (en) * | 2011-11-30 | 2013-06-10 | Kawamori Sangyo Kk | Suspended scaffold |
| CN203499226U (en) * | 2012-12-18 | 2014-03-26 | 中国建筑第八工程局有限公司 | Binding beam type steel cantilever scaffold |
| CN204456808U (en) * | 2014-12-18 | 2015-07-08 | 中国建筑第八工程局有限公司 | Assembly type overhanging unloading platform |
| CN205036063U (en) * | 2015-08-18 | 2016-02-17 | 中国建筑第二工程局有限公司 | A operation platform that encorbelments for building inside is encorbelmented position and is under construction |
| CN205804911U (en) * | 2016-06-03 | 2016-12-14 | 浙江省建工集团有限责任公司 | A kind of builder's jack |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113550550A (en) * | 2021-06-30 | 2021-10-26 | 重庆建工第三建设有限责任公司 | Overhanging unit type scaffold convenient to assemble and disassemble |
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