CN105696802B - Edge protection column and its installation method in constructing applied to large area floor template - Google Patents
Edge protection column and its installation method in constructing applied to large area floor template Download PDFInfo
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- CN105696802B CN105696802B CN201610233499.XA CN201610233499A CN105696802B CN 105696802 B CN105696802 B CN 105696802B CN 201610233499 A CN201610233499 A CN 201610233499A CN 105696802 B CN105696802 B CN 105696802B
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- way pipe
- pipe
- edge protection
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- 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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/32—Safety or protective measures for persons during the construction of buildings
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- 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
- E04G19/00—Auxiliary treatment of forms, e.g. dismantling; Cleaning devices
-
- 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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
Abstract
The invention discloses the edge protection columns and its installation method in a kind of construction applied to large area floor template, the edge protection column is mounted on the vertical steel pipe of formwork-support, including more spaced upright bars and Duo Gen are mounted between adjacent upright bar and are in horizontally disposed cross bar；In the lower end of every upright bar, there are one the sleeves for being sleeved on vertical steel pipe top in formwork-support for equal socket joint.By the way that protective fence upright bar is connected with the vertical steel pipe in formwork-support, to install protective fence, the mounting means is easier, while will not be damaged to template and concrete layer.The present invention obtain be applied to large area floor template construction in edge protection column by the way that protective fence is fixedly mounted on the vertical steel pipe of formwork-support, the safety of construction personnel in large area flooring work progress can be effectively improved, while template and concrete layer will not be damaged.
Description
Technical field
The invention belongs to the realm of building construction, and in particular to a kind of to be applied to face frontier defense in the construction of large area floor template
Guardrail and its installation method.
Background technology
It, can be on the flooring completed when successively constructing to the flooring construction of large area during construction
Set up the full hall frame formwork-support of landing（I.e. with the scaffold of floor area equal areas, such as Patent No.
201120028923.X a kind of steel pipe template support frame）, floor template is then carried out again to be set up, last casting concrete.Tool
During body construction, due to the limitation of artificial quantity, floor template usually requires subregion construction, i.e., cooks up as the case may be several
A construction area, and scaffold is set up respectively in each region.During subregion is constructed, many building enterprises all do not make
Corresponding edge protection, there are prodigious security risks.
Under normal conditions, the protection for facing flooring side is mainly protected by way of installing protective fence.The buildings Ji
Protective fence is fixedly mounted on the concrete layer of layer.The mounting means of this guardrail is more time-consuming, in Specific construction, worker
In order to lazy, seldom installation in this way.
Invention content
In view of the above shortcomings of the prior art, the technical problem to be solved by the present invention is to：
When constructing to large area floor template, the installation of safety guide rail is seldom carried out to template Lin Bianchu, there is peace
Full hidden danger, and existing edge protection column need to be fixed on concrete layer, installation process is time-consuming and laborious.
In order to solve the above-mentioned technical problem, present invention employs the following technical solutions：
A kind of edge protection column being applied in the construction of large area floor template, which is characterized in that protective fence is mounted on mould
On the vertical steel pipe of plate bracing frame, including more spaced upright bars and Duo Gen are mounted between adjacent upright bar and are set in level
The cross bar set；In the lower end of every upright bar, there are one the sleeves for being sleeved on vertical steel pipe top in formwork-support for equal socket joint.Pass through
Protective fence upright bar is connected with the vertical steel pipe in formwork-support, to install protective fence, the mounting means is easier,
Template and concrete layer will not be damaged simultaneously.
As an optimization, away from the barrel end at least threaded hole of 5mm there are one being all provided at the both ends of each sleeve, in each spiral shell
The fastening screw being threadedly coupled with it there are one being all provided in pit.Such setting is not only able to upright bar and template branch securely
Vertical steel pipe in support is fixed together, and is also convenient for mounting and dismounting.Meanwhile threaded hole apart from barrel end at least
5mm, both ensure that upright bar is inserted in depth, keeps it more secured, additionally it is possible to convenient for according to actual conditions so that upright bar is inserted into not
Same depth, to play the role of the fine adjustment of opposition pole length.
As an optimization, three-way pipe there are one being arranged on the top of every upright bar, the end of the cross bar is set in threeway
In the transverse pipe of pipe, the length of each branch pipe of three-way pipe is 15-25cm, is equipped with away from it on each branch pipe of each three-way pipe
The end at least threaded hole of 5mm, is all provided with that there are one the fastening screws that are threadedly coupled with it in each threaded hole.Pass through three-way pipe
Cross bar and upright bar are connected, socket is convenient, meanwhile, the length of each branch pipe is longer in the three-way pipe, can be according to actual conditions, will
Each cross bar is inserted into different depth, then is fixed by fastening screw, to realize the purpose to cross bar length adjustment.Meanwhile spiral shell
Pit is apart from the barrel end at least setting of 5mm, additionally it is possible to ensure cross bar insertion depth after 5mm-25cm, it also can be solid to it
It is fixed.
As an optimization, every upright bar is formed by least two vertical strut combinations, is equipped between adjacent vertical strut
Each branch length of tube of one four-way pipe for connecting vertical strut and cross bar, the four-way pipe is 15-25cm；The cross bar
The equal socket joint in both ends is fixed in the transverse pipe of four-way pipe, and by fastening screw in four-way pipe.Pass through several vertical strut groups
Upright bar is filled, the quantity of vertical strut can be increased according to actual conditions, it is adjacent vertical in a disguised form increase the length of upright bar
It is attached by four-way pipe between strut, to realize the connection of strut and cross bar so that the structure of protective fence is more firm
Gu.In addition, each branch length of tube that four-way pipe compares standard four-way pipe is longer, it can be achieved that adjusting the mesh of vertical strut and cross bar length
's.
As an optimization, it is equipped on each branch pipe of each four-way pipe away from its end at least threaded hole of 5mm, the screw thread
Hole and fastening screw screw-thread fit.Threaded hole is apart from the barrel end at least setting of 5mm, additionally it is possible to ensure cross bar and vertical strut
Insertion depth can also fix it after 5mm-25cm.
As an optimization, the distance between adjacent upright bar is 1m-2.2m, which can ensure the intensity of protective fence；Facing
It is also mounted with Dense mesh screen on the outside of frontier defense guardrail, which can ensure that staff and tool will not be from the gaps between upright bar
It falls, it is safer.
A kind of installation method on the edge protection column being applied in the construction of large area floor template, which is characterized in that it is wrapped
Include following steps：
S1：According to the quantity of floor area and construction worker, to flooring progress district operation planning to be onstructed, and according to
Specific partitioning scenario, reasonable Arrangement formwork-support upright bar；Simultaneously, it would be desirable to which all components for setting up edge protection column transport
On construction site, wherein three-way pipe and four-way pipe need to be had made to order in factory and transport again onto construction site after the assay was approved；S2：
Set up and installation form supporting rack, after formwork-support sets up completion, prolong construction joint it is 10 centimeters outer to set up a row vertical
Steel pipe, this row's vertical steel pipe is as the basis for setting up rear floor template edge protection railing；S3：Completion is set up in step 2
One sleeve of socket joint need to ensure the depth of vertical steel pipe insertion sleeve at least during grafting on each vertical steel pipe
For 5mm；After insertion sleeve, while sleeve being fixed on vertically after being located at the threaded hole of lower end using fastening screw insertion sleeve
On steel pipe；S4：It is inserted on each sleeve after a corresponding upright bar and vertical strut is fixed on sleeve with fastening screw；
S5：Equal one three-way pipe of socket joint on every rod end, and it is inserted into fastening screw on the threaded hole on its vertical branch pipe, so
After rotate fastening screw, three-way pipe is fixed in upright bar；S6：It is inserted into one in the left and right ends of the three-way pipe positioned at middle part
Cross bar, and cross bar is fixed on to using fastening screw the both ends of three-way pipe；It is above-mentioned after installation is complete, that is, complete the peace of guard rail
Dress；S7：One layer of Dense mesh screen is hung on protective fence after the completion of setting up.
It using protective fence is installed on formwork-support, is not only able to play the protective action to personnel, additionally it is possible to rationally
Ground utilizes floor template supporting rack, to avoid damaging to template and flooring.
As an optimization, the upright bar in step 4 is assembled by two vertical struts, is consolidated by wherein one vertical strut
After being scheduled on sleeve upper end, a four-way pipe need to be inserted on the vertical strut, and be inserted into another in the upper end of four-way pipe simultaneously
Then four-way pipe and vertical strut are fixed together by vertical strut using fastening screw, form a complete upright bar.
It as an optimization, need to be in four-way pipe in the middle part of protective fence or so two after four-way pipe and vertical strut fix
It is inserted into a cross bar respectively on the athwartship leg of end, and is fixed cross bar and four-way pipe using fastening screw.
As an optimization, during the installation process, it is adjusted if you need to the length to cross bar and vertical strut, need to only unclamp and hold out against spiral shell
After bar, cross bar and/or vertical strut are promoted to each branch pipe of three-way pipe and/or four-way pipe or pull out one end distance, then again
Fastening screw is rotated, it is made to fix.
Compared with prior art, the present invention obtain be applied to large area floor template construction in edge protection column and its
Installation method has the following advantages that：
1, by the way that guard rail is mounted on facing on the vertical steel pipe of side in formwork-support, template branch is reasonably utilized
Support will not damage template and concrete layer.
2, connect the vertical steel pipe of the upright bar and formwork-support of guard rail by using the mode of sleeve, installation and
Dismounting mode is quite convenient to and quickly.
3, the various pieces in guard rail are connected by three-way pipe, four-way pipe so that the dismounting of guard rail is all very
It is convenient, meanwhile, guard rail is assembled by standardized vertical strut and cross bar, not only facilitates the processing of above-mentioned component, moreover it is possible to
Realize the purpose of standardized construction.
4, by being threaded hole on sleeve, three-way pipe, four-way pipe, and vertical strut and cross are locked using fastening screw
Bar so that cross bar and vertical strut are not only able to slide in corresponding connecting pipe, additionally it is possible to by adjusting cross bar and vertical branch
The insertion depth of bar adjusts the length of upright bar and cross bar.
5, by the adjustment of steel pipe insertion depth in three-way pipe, four-way pipe, live supporting rack upright bar part is rationally solved
Spacing deviation and problem that guardrail upright pole can not correspond to, tool-type protective fence application range increase, and ensure that the quick of installation.
Description of the drawings
Fig. 1 is the attachment structure schematic diagram of formwork-support and protective fence in embodiment；
Fig. 2 is the attachment structure schematic diagram on edge protection column in embodiment.
In figure：Formwork-support 1, vertical steel pipe 11, upright bar 2, vertical strut 21, cross bar 3, three-way pipe 4, four-way pipe 5, set
Cylinder 6, fastening screw 7.
Specific implementation mode
Present invention will be further explained below with reference to the attached drawings and examples.
Embodiment：
As shown, the edge protection column in the construction provided in this embodiment applied to large area floor template, specifically,
Protective fence is mounted on the vertical steel pipe 11 of formwork-support 1, including more spaced upright bars 2 and Duo Gen are mounted on adjacent
Between upright bar 2 and it is in horizontally disposed cross bar 3；The cross bar 3 is provided with two rows, and in the lower end of every upright bar 2, equal socket joint has one
A sleeve 6 for being sleeved on vertical steel pipe top in formwork-support, the both ends of each sleeve 6 be all provided with there are one away from barrel end extremely
The threaded hole of few 5mm, is all provided with that there are one the fastening screws 7 being threadedly coupled with it in each threaded hole.
Three-way pipe 4 there are one being arranged on the top of every upright bar 2, the end of the cross bar 3 is set in the cross of three-way pipe 4
Into pipe, the length of 4 each branch pipe of the three-way pipe is 20cm, is equipped on each branch pipe of each three-way pipe 4 away from its end 5mm
Threaded hole, be all provided with that there are one the fastening screws 7 that are threadedly coupled with it in each threaded hole.Certainly, in the mistake of specific implementation
Cheng Zhong can be attached between 2 top of upright bar at protective fence both ends and cross bar 3 by L-shaped bend pipe.
In the present embodiment, every upright bar 2 is composed of two vertical struts 21, between adjacent vertical strut 21
If there are one the four-way pipe 5 for connecting vertical strut 21 and cross bar 3, each branch length of tube of the four-way pipe 5 is 20cm；It is described
The equal socket joint in both ends of cross bar 3 is fixed in the transverse pipe of four-way pipe 5, and by fastening screw in four-way pipe 5.In each four-way
It is equipped on each branch pipe of pipe 5 away from its end at least threaded hole of 5mm, the threaded hole and fastening screw screw-thread fit.Certainly,
In specific implementation process, it can be stood a three-way pipe is socketed positioned at the end of the upright bar 2 of protective fence both sides instead of four-way pipe 5
The connection of bar 2 and cross bar 3.
In addition, in the present embodiment, the distance between adjacent upright bar 2 is 1m-2.2m, is also mounted in edge protection marge side
There is Dense mesh screen（It is not marked in figure）.
In the specific implementation, for the ease of socket joint cross bar 3 and upright bar 2, bend pipe, three-way pipe 4, four-way pipe 5, sleeve 6 pipe
Part terminus lumen is in pyramidal, and wall thickness of the outer wall from end to inner end gradually increases.Bend pipe, three-way pipe 4, four-way pipe 5, set
Threaded hole in cylinder 6 protrudes from tube wall, and threaded hole surrounding is equipped with reinforcing rib.
Specifically, the upright bar of edge protection railing and supporting rack upright bar relation table are as follows in the present embodiment：
A kind of installation method on the edge protection column being applied in the construction of large area floor template, it includes the following steps：
S1：According to the quantity of floor area and construction worker, to flooring progress district operation planning to be onstructed, and according to
Specific partitioning scenario, reasonable Arrangement formwork-support upright bar；Simultaneously, it would be desirable to which all components for setting up edge protection column transport
On construction site, wherein three-way pipe and four-way pipe need to be had made to order in factory and transport again onto construction site after the assay was approved；
S2：Set up and installation form supporting rack 1, formwork-support take 1 set completion after, prolong construction joint it is 10 centimeters outer at
Row's vertical steel pipe is set up, this row's vertical steel pipe is as the basis for setting up rear floor template edge protection railing；
S3：Equal one sleeve 6 of socket joint on each vertical steel pipe 11 of completion is set up in step 2, in the process of grafting
In, it need to ensure that the depth of 11 insertion sleeve 6 of vertical steel pipe is at least 5mm；It is inserted after insertion sleeve 6, while using fastening screw 7
Enter after sleeve 6 is located at the threaded hole of lower end and sleeve 6 is fixed on vertical steel pipe 11；
S4：It is inserted on each sleeve 6 after a corresponding upright bar 2 and is fixed on vertical strut 21 with fastening screw 7
On sleeve 6；
S5：Equal one three-way pipe 4 of socket joint on every 2 top of upright bar, and be inserted on the threaded hole on its vertical branch pipe
Then fastening screw 7 rotates fastening screw 7, three-way pipe 4 is fixed in upright bar 2；
S6：It is inserted into a cross bar 3 in the left and right ends of the three-way pipe 4 positioned at middle part, and uses fastening screw 7 by cross bar
3 are fixed on the both ends of three-way pipe 4；It is above-mentioned after installation is complete, that is, complete the installation of guard rail；S7：It is anti-after the completion of setting up
One layer of Dense mesh screen is hung on guardrail.
Specifically, in the present embodiment, the upright bar 2 in step 4 is assembled by two vertical struts 21, will wherein
After a piece vertical strut 21 is fixed on 6 upper end of sleeve, a four-way pipe 5 need to be inserted on the vertical strut 21, and simultaneously four
Another vertical strut 21 is inserted into the upper end of siphunculus 5, and four-way pipe 5 and vertical strut 21 are then fixed on one using fastening screw
It rises, forms a complete upright bar 2.
In order to also install cross bar 3 in the middle part of protective fence, cross bar 3 is fixed, is fixed in four-way pipe 5 and vertical strut 21
After good, a cross bar 3 need to be inserted into respectively on the 5 left and right ends athwartship leg of four-way pipe in the middle part of protective fence, and use top
Tight screw rod 7 fixes cross bar and four-way pipe 5.
During the installation process, it is adjusted if you need to the length to cross bar 3 and vertical strut 21, after only need to unclamping fastening screw 7,
Cross bar 3 and/or vertical strut 21 are promoted to each branch pipe of three-way pipe 4 and/or four-way pipe 5 or pull out one end distance, then again
Fastening screw 7 is rotated, it is made to fix.
Finally, it should be noted that technical side the above examples are only used to illustrate the technical scheme of the present invention and are not limiting
Case, although applicant describes the invention in detail with reference to preferred embodiment, those skilled in the art should manage
Solution, those are modified or replaced equivalently technical scheme of the present invention, without departing from the objective and range of the technical program,
It is intended to be within the scope of the claims of the invention.
Claims (4)
1. a kind of installation method on the edge protection column in construction applied to large area floor template, which is characterized in that it includes
Following steps：
S1：According to the quantity of floor area and construction worker, district operation planning is carried out to flooring to be onstructed, and according to specific
Partitioning scenario, reasonable Arrangement formwork-support upright bar；Simultaneously, it would be desirable to which all components for setting up edge protection column transport construction
On place, wherein three-way pipe and four-way pipe need to be had made to order in factory and transport again onto construction site after the assay was approved；
S2：Set up simultaneously installation form supporting rack（1）, in formwork-support（1）After setting up completion, along outside construction joint 10 centimeters
Row's vertical steel pipe is set up, this row's vertical steel pipe is as the basis for setting up rear floor template edge protection railing；
S3：Each vertical steel pipe of completion is set up in step s 2（11）One sleeve of upper equal socket joint（6）, in the process of grafting
In, it need to ensure vertical steel pipe（11）Insertion sleeve（6）Depth be at least 5mm；In insertion sleeve（6）Afterwards, while use is held out against
Screw rod（7）Insertion sleeve（6）By sleeve after the threaded hole of lower end（6）It is fixed on vertical steel pipe（11）On；
S4：In each sleeve（6）A piece corresponding upright bar of upper insertion（2）Afterwards and use fastening screw（7）By vertical strut（21）Gu
It is scheduled on sleeve（6）On；
S5：In every upright bar（2）Equal one three-way pipe of socket joint on top（4）, and be inserted on the threaded hole on its vertical branch pipe
Fastening screw（7）, then rotate fastening screw（7）, by three-way pipe（4）It is fixed on upright bar（2）On；
S6：In the three-way pipe positioned at middle part（4）Left and right ends be inserted into a cross bar（3）, and use fastening screw（7）It will be horizontal
Bar（3）It is fixed on three-way pipe（4）Both ends；It is above-mentioned after installation is complete, that is, complete the installation of guard rail；
S7：One layer of Dense mesh screen is hung on protective fence after the completion of setting up.
2. the installation method on the edge protection column in the construction according to claim 1 applied to large area floor template,
It is characterized in that, the upright bar in step S4（2）By two vertical struts（21）Assemble, will a wherein vertical strut（21）
It is fixed on sleeve（6）It, need to be in the vertical strut behind upper end（21）One four-way pipe of upper insertion（5）, and simultaneously in four-way pipe（5）'s
Another vertical strut is inserted into upper end（21）, then use fastening screw by four-way pipe（5）With vertical strut（21）It is fixed on one
It rises, forms a complete upright bar（2）.
3. the installation method on the edge protection column in the construction according to claim 2 applied to large area floor template,
It is characterized in that, in four-way pipe（5）With vertical strut（21）It, need to be in the four-way pipe in the middle part of protective fence after fixing（5）Left and right
A cross bar is inserted on the athwartship leg of both ends respectively（3）, and use fastening screw（7）By cross bar and four-way pipe（5）It is fixed.
4. the installation method on the edge protection column in the construction according to claim 2 or 3 applied to large area floor template,
It is characterized in that, during the installation process, if you need to cross bar（3）With vertical strut（21）Length adjust, only need to unclamp and hold out against
Screw rod（7）Afterwards, by cross bar（3）And/or vertical strut（21）To three-way pipe（4）And/or four-way pipe（5）Each branch pipe promote or draw
Go out one end distance, then rotates fastening screw again（7）, it is made to fix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610233499.XA CN105696802B (en) | 2016-04-15 | 2016-04-15 | Edge protection column and its installation method in constructing applied to large area floor template |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610233499.XA CN105696802B (en) | 2016-04-15 | 2016-04-15 | Edge protection column and its installation method in constructing applied to large area floor template |
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| CN105696802A CN105696802A (en) | 2016-06-22 |
| CN105696802B true CN105696802B (en) | 2018-07-20 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106836798A (en) * | 2017-01-23 | 2017-06-13 | 中建四局第三建筑工程有限公司 | A kind of Xin Jiamo construction methods and guard bar structure |
| CN107217862A (en) * | 2017-06-19 | 2017-09-29 | 中国五冶集团有限公司 | A kind of outer protection network supporting construction and outer protection net construction method |
| CN112252751A (en) * | 2020-11-11 | 2021-01-22 | 中建七局(上海)有限公司 | Mounting protection structure for building engineering with adjustable |
| CN113309348B (en) * | 2021-06-23 | 2024-01-30 | 高创建工股份有限公司 | High altitude construction roof beam formwork support |
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|---|---|---|---|---|
| AU2004100553A4 (en) * | 2004-07-06 | 2004-08-12 | Pch Group Limited | Ladder access standard |
| KR20090099182A (en) * | 2008-03-17 | 2009-09-22 | 이노건설주식회사 | Integrated guard railing for built up scaffolding |
| CN203514838U (en) * | 2013-10-11 | 2014-04-02 | 扬州市天成建筑安装工程有限公司 | Multi-angle adjustable edge protective handrail |
| CN204343791U (en) * | 2014-12-25 | 2015-05-20 | 马鞍山市秋枫工程塑料异型材料制造有限责任公司 | A kind of anti-explosion area uses protective guard |
| CN205502616U (en) * | 2016-04-15 | 2016-08-24 | 中冶建工集团有限公司 | Be applied to and face frontier defense guardrail in construction of large tracts of land floor template |
-
2016
- 2016-04-15 CN CN201610233499.XA patent/CN105696802B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2004100553A4 (en) * | 2004-07-06 | 2004-08-12 | Pch Group Limited | Ladder access standard |
| KR20090099182A (en) * | 2008-03-17 | 2009-09-22 | 이노건설주식회사 | Integrated guard railing for built up scaffolding |
| CN203514838U (en) * | 2013-10-11 | 2014-04-02 | 扬州市天成建筑安装工程有限公司 | Multi-angle adjustable edge protective handrail |
| CN204343791U (en) * | 2014-12-25 | 2015-05-20 | 马鞍山市秋枫工程塑料异型材料制造有限责任公司 | A kind of anti-explosion area uses protective guard |
| CN205502616U (en) * | 2016-04-15 | 2016-08-24 | 中冶建工集团有限公司 | Be applied to and face frontier defense guardrail in construction of large tracts of land floor template |
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| CN105696802A (en) | 2016-06-22 |
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