CN105226560B - A kind of crossing frame and its construction method - Google Patents
A kind of crossing frame and its construction method Download PDFInfo
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- CN105226560B CN105226560B CN201510687603.8A CN201510687603A CN105226560B CN 105226560 B CN105226560 B CN 105226560B CN 201510687603 A CN201510687603 A CN 201510687603A CN 105226560 B CN105226560 B CN 105226560B
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- car body
- crossing frame
- arm support
- hanging basket
- head
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Abstract
The invention discloses a kind of crossing frame and its construction methods.The crossing frame includes being movably arranged at the first car body and the second car body across object both sides, first car body and the second car body include crossing frame head, vehicle frame, arm support and arm support platform, wherein, the bottom of frame is provided with walking mechanism, and swing mechanism is provided on the vehicle frame；The arm support is installed on swing mechanism, and jib lubbing mechanism and hoisting mechanism are provided on the arm support；The arm support stage+module is on the head of arm support；The crossing frame head is mounted on arm support platform；Suspension hook connection on manned hanging basket and hoisting mechanism；The crossing frame further includes the block device for block operation.The present invention has the advantages that easy to operate, safe and reliable, process is time saving and peripheral facilities is influenced smaller.
Description
Technical field
The present invention relates to electric operating field, more particularly to a kind of crossing frame and its construction method.
Background technology
In electric power transmission industry, when great unexpected incidents occur (including meteorological disasters such as high temperature, thunderstorm, typhoon, ice and snow
And human factor) when causing great power grid damage event, it need to be in Guan Chong regions, such as the high pressures such as high ferro, high speed, track traffic
Circuit passes through overlying regions, and drawing sets catch net.It is domestic at present that the pattern for setting such catch net is drawn mainly to be crossed over using non-self-propelled
Frame is roughly divided into four kinds：Mao bamboon frame crossing frame (including steel pipe frame), only column pole grasp type crossing frame (including door type frame), whole shelves envelope
Net and bridge-type crossing frame (are similar to the crossing frame that four sets rocker poles form), and more than crossing frame is widely used general, but deposits
In following shortcoming：
1. the crossing frame erection construction cycle is longer, cumbersome, particularly when needs build height higher (>=30 meters)
, it is necessary to which more, complex procedures of building material, human input are big during crossing frame；Crossing frame pedestal needs digging dell to insert, crossing frame frame
Body needs sectional, is then erected by external puller system or using manpower.
2. being influenced on peripheral facilities greatly, the crossing frame of general structure is built since crossing frame frame structure limits, stability
Difference, it is necessary to draw sets cubic bracing wire and keeps balance across body, and cubic pull wire grounding needs to set up earth anchor, and earth anchor generally requires to dig deep
Hole, landfill concrete etc., process is time-consuming and peripheral facilities is influenced big.
3. when setting up crossing frame block, it is necessary to which operating personnel is taken from ground by crossing frame climbing to crossing frame head
If process hazard is climbed, and the time is long, when being particularly freezing rain and snow disaster, is prone to accidents.
In conclusion how to provide, one kind is easy to operate, safe and reliable, process is time saving and peripheral facilities is influenced smaller
Crossing frame and its construction method, into those skilled in the art it is urgently to be resolved hurrily the technical issues of.
The content of the invention
In view of this, one of the problem to be solved in the present invention is to provide a kind of crossing frame, is constructed with solving existing crossing frame
The problem of cycle length, complex procedures, relatively low stability difference and security.
The two of the problem to be solved in the present invention are to provide a kind of above-mentioned across frame construction method.
One of in order to solve the above problem, the present invention provides a kind of crossing frames, and object two is crossed over including being movably arranged at
The first car body and the second car body of side, first car body and the second car body are put down including crossing frame head, vehicle frame, arm support and arm support
Platform, wherein,
The bottom of frame is provided with walking mechanism, and swing mechanism is provided on the vehicle frame；
The arm support is installed on swing mechanism, and jib lubbing mechanism and hoisting mechanism are provided on the arm support；
The arm support stage+module is on the head of arm support；
The crossing frame head is mounted on arm support platform；
Suspension hook connection on manned hanging basket and hoisting mechanism；
The crossing frame further includes the block device for block operation.
Further, the block device includes load drawstring, monolithic coaster and guide rope, the quantity of the load drawstring
For two, the monolithic pulley suspension is arranged at the both ends of the crossing frame head, and one end of two load drawstrings passes through
Monolithic coaster is connected with guide rope.
Further, the block device further includes traction rope, and two traction ropes are both provided on the every guide rope,
One end of the every traction rope is connected with guide rope, and the other end is fixedly installed on arm head platform.
Further, safety device, the security protection dress are additionally provided on first car body and the second car body
When putting startup, except the lifting action of hanging basket, remaining action stop on first car body and the second car body.
Further, the safety device is installed in the control cabinl pulpit of first car body and the second car body, and is led to
It crosses and manipulates indoor control switch control start and stop, the lifting action of hanging basket is grasped with taking the remote controler of the operating personnel of hanging basket carrying
It acts as priority.
Further, it is provided with the support for preventing arm support posture from changing dress on first car body and the second car body
It puts, the support is arranged between turntable and arm support.
Further, the support device includes length-adjustable pulling plate, and described pulling plate one end is fixedly installed on turntable tail
Portion, the other end are fixedly installed on arm support afterbody.
Further, when the height across object is less than 36 meters, bracing wire connecting component is not provided on the crossing frame head；
Or, the height across object is provided with bracing wire connecting component on the crossing frame head when being greater than or equal to 36 meters.
Further, equally spacedly suspension is provided with multiple U-shaped rings on the every load drawstring, each U-shaped ring
Lower end is linked with insulating bar, and the operating personnel on the second car body guides insulating bar into second vehicle by traction rope from the first car body
Body.
On the other hand, comprise the following steps the present invention also provides a kind of across frame construction method：
First car body and the second car body stop respectively to the both sides across object, support lift frame, the first car body and the second car body
Tire depart from ground；
Operating personnel by jib lubbing mechanism and swing mechanism, by arm support rise width and returning back to be suitble to assembling arm head platform and
The position of crossing frame head；
Crossing frame head and arm head platform are assembled to arm support head, control arm erects width after finishing, while operates hoist engine
Structure makes suspension hook drop down onto ground, and hanging basket is sling, and has continued width to arm head platform in horizontal level, and manipulating swing mechanism extremely will be across
More direction, elongation arm support to will spanning height, confirmation position it is correct after, hanging basket is put to ground or vehicle frame；
Operating personnel takes hanging basket and rises to the progress block operation of crossing frame head position.
Further, the block operation comprises the following steps：
Using unmanned vehicle or propeller-parachuting by the guiding wire saws on the first car body to the second car body, by the second car body
On operating personnel receive guide rope, by the monolithic coaster of crossing frame head, the ground of opposite side is extended to, until load is drawn
Rope guiding to the second car body lands, and after controlling load drawstring arc sag, then is fixed with Lever Blocks；
While operating personnel receives guide rope, traction rope is pulled to and is fixed on the second car body；
After the block end of job, the tension of load drawstring is adjusted.
Further, the operating personnel take hanging basket rise to crossing frame head position carry out block operation further include it is following
Step：
Operating personnel carries Digiplex and enters in hanging basket, and manipulate hoisting mechanism by Digiplex hangs and then realization
The lift work of basket, at this point, except the lifting action of hanging basket, remaining action stop on the first car body and the second car body.
Further, it is further comprising the steps of before the block operation：
If being greater than or equal to 36 meters across object height, the cubic bracing wire connected is fixed on ground embedding good ground in advance
On anchor；
If being less than 36 meters across object height, this step is omitted.
The crossing frame and its construction method of the present invention crosses over frame body using the first car body and the second car body instead of tradition,
Double vehicle work compounds, mechanized construction can need not set bracing wire under the fast construction dismounting meter spanning height of crossing frame, especially 36
Connecting component saves activity time, meanwhile, operating personnel need not be by manually climbing upper crossing frame top, it is not required that straight
It goes to the station to meet somebody on arm head platform, rises with arm support, but positioned in crossing frame, confirm that safety and then scheduling job personnel take
Special lifting hanging basket rises to operation on crossing frame head with this vehicle, it is ensured that working security.
In further technical solution, safety device is additionally provided on the first car body and the second car body of the invention,
Operating personnel be ensure that in the uphill process to crossing frame and in crossing frame in operation process, car body is not generated except hanging basket
Remaining any dangerous play outside lifting action, ensure that the security of operating personnel.
In further technical solution, it is additionally provided with to prevent arm support appearance on the first car body and the second car body of the invention
The support device that gesture changes, ensure that crossing frame in long working, will not occur frame body movement or angle due to hydraulic pressure is revealed
The postures such as degree variation change phenomenon, cause block height change, and then cause accident.
Description of the drawings
The attached drawing for forming the part of the present invention is used for providing a further understanding of the present invention, schematic reality of the invention
Example and its explanation are applied for explaining the present invention, is not constituted improper limitations of the present invention.In the accompanying drawings：
Fig. 1 is the dimensional structure diagram of crossing frame of the present invention；
Fig. 2 is the dimensional structure diagram of one state of crossing frame of the present invention；
Fig. 3 is the top view of Fig. 2；
Fig. 4 is the part-structure schematic diagram of Fig. 1；
Fig. 5 is the part-structure schematic diagram of Fig. 1.
Reference sign
First 2 arm head platform, 3 arm support of 1 crossing frame
4 vehicle frame, 5 hanging basket, 6 hoisting mechanism
7 load drawstring, 8 monolithic coaster, 9 guide rope
10 traction rope 11U type rings, 12 insulating bar
13 turntable, 14 pulling plate, 15 axis pin
16 oil cylinder, 17 first car body, 18 second car body
19 cross over 20 cat ladder of object
Specific embodiment
It should be noted that in the case where there is no conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
As shown in Figures 1 to 5, a kind of crossing frame crosses over the first car body 17 of 19 both sides of object including being movably arranged at
With the second car body 18, the first car body 17 and the second car body 18 include crossing frame first 1, vehicle frame 4, arm support 3 and arm head platform 2,
In, 4 bottom of vehicle frame is provided with walking mechanism, and swing mechanism is provided on vehicle frame 4；The afterbody of arm support 3 is installed on swing mechanism,
Specifically, arm support 3 includes the sequentially connected joint arm of more piece, Telescopic movable between adjacent joint arm, and is provided with luffing on arm support 3
Mechanism and hoisting mechanism 6, vehicle frame 4 realize 360 ° of revolutions with arm support 3 by swing mechanism, realize that angle becomes by jib lubbing mechanism
It changes；Arm head platform 2 is mounted on the head of arm support 3；Crossing frame first 1 is mounted on arm head platform 2；For manned hanging basket 5 and volume
The suspension hook connection in mechanism 6 is raised, by the hoist engine of hoisting mechanism 6 lift rope is driven by hanging basket 5 rise up and down by suspension hook
Drop；Crossing frame further includes the block device for block operation；Foregoing crossing frame further includes cat ladder 20, cat ladder 20 and arm head platform
2 and the joint arm of least significant end be fixedly connected.
It should be noted that, in the present invention when the height across object 19 is less than 36 meters, it is not provided with drawing in crossing frame first 1
Line connecting component；But when the height across object 19 is greater than or equal to 36 meters, bracing wire connecting portion is additionally provided in crossing frame first 1
Part.The bracing wire connecting component includes cubic bracing wire and cubic bracing wire utensil, which is preferably connected to the four of 3 arm head of arm support
At a node.
As shown in Figures 2 to 4, block device includes load drawstring 7, monolithic coaster 8, guide rope 9 and traction rope 10, load
The quantity of drawstring 7 is two, and monolithic coaster 8 hangs the both ends for being arranged at crossing frame first 1, and one end of two load drawstrings 7 is logical
It crosses monolithic coaster 8 with guide rope 9 to be connected, two traction ropes 10, one end of every traction rope 10 is both provided on every guide rope 9
It is connected with guide rope 9, the other end is fixedly installed on arm head platform 2.Meanwhile on every load drawstring 7 equally spacedly
Suspension is provided with multiple U-shaped rings 11, and each U-shaped 11 lower end of ring is linked with insulating bar 12, and the operating personnel on the second car body 18 is led to
It crosses traction rope 10 and guides insulating bar 12 into second car body 18 from the first car body 17, and then complete block operation.Such as insulating bar 12,
Load drawstring 7, guide rope 9 and 10 grade blocks material of traction rope can be directly placed on crossing frame first 1 and/or arm head platform 2,
Arm support 3 is followed to play width to be promoted to spanning height, transport of materials can be saved and promote the time.It should be noted that load drawstring 7 is preferred
For steel wire rope, traction rope 10 is nylon rope.
In addition, it is worth mentioning that be additionally provided with safety device on the first car body 17 and the second car body 18, the safety
Protective device is installed in the control cabinl pulpit of the first car body 17 and the second car body 18, and pass through manipulate it is indoor control switch control open
Stop, when the safety device starts, on the first car body 17 and the second car body 18 in addition to the lifting action of hanging basket 5, remaining
Action stops, but the portable remote controler of operating personnel for taking hanging basket 5 also can control hanging basket 5 to lift, and the liter of hanging basket 5
Drop action is acted using taking the remote controller operation that the operating personnel of hanging basket 5 carries to be preferential.
Foregoing jib lubbing mechanism is preferably oil cylinder 16 in the present invention.As shown in figure 5, turntable 13 and arm support 3 by oil cylinder 16 come
Angle changing and hold mode, but when long-time place when, due to block load, oil cylinder 16 can generate in let out, turntable
13 and the relative angle of arm support 3 can become smaller, influence the relative position between crossing frame first 1, cause block height change, and then produce
It makes trouble former, for this purpose, being additionally provided with to prevent the branch that 3 posture of arm support changes on the first car body 17 and the second car body 18 in the present invention
Support arrangement, the support are arranged between turntable 13 and arm support 3.As shown in figure 5, support device includes length-adjustable pulling plate 14,
14 one end of pulling plate is fixedly installed on 13 afterbody of turntable, and the other end is fixedly installed on 3 afterbody of arm support, and pulling plate 14 is equipped with multiple
Adjustable distance hole, multiple adjustable distance holes are interfixed by axis pin 15.
As shown in Figures 1 to 5, the first car body 17 and the second car body 18 are preferably autocrane.It should be noted that say,
Other cranes such as rough-terrain crane, the full Terrain Cranes are also within the scope of the present invention.
In order to further illustrate the crossing frame of the present invention, the present invention also provides a kind of across frame construction method, including with
Lower step：
First car body 17 and the second car body 18 stop respectively to the both sides across object 19, support lift frame 4,17 He of the first car body
The tire of second car body 18 departs from ground；
Operating personnel by jib lubbing mechanism and swing mechanism, by arm support 3 rise width and returning back to be suitble to assembling arm head platform 2 with
And the position of crossing frame first 1；
Crossing frame first 1 and arm head platform 2 are assembled to 3 head of arm support, arm support 3 is manipulated after finishing and plays width, while operate volume
Raising mechanism 6 makes suspension hook drop down onto ground, and hanging basket 5 is sling, and has continued width to arm head platform 2 in horizontal level, has manipulated swing mechanism
Extremely will cross over direction, elongation arm support 3 to will spanning height, confirm position it is correct after, hanging basket 5 is put to ground or vehicle frame 4
On；
Operating personnel takes hanging basket 5 and rises to the first 1 position progress block operation of crossing frame.
Specifically, the block operation comprises the following steps：
The guide rope 9 on the first car body 17 is drawn to the second car body 18 using unmanned vehicle or propeller-parachuting, by
Operating personnel on two car bodies 18 receives guide rope 9, by the monolithic coaster 8 of crossing frame first 1, extends to the ground of opposite side,
Until load drawstring 7 is guided to the second car body 18 land, after 7 arc sag of control load drawstring, then fixed with Lever Blocks；
While operating personnel receives guide rope 9, traction rope 10 is pulled to and is fixed on the second car body 18；
After the block end of job, the tension of load drawstring 7 is adjusted.
It should be noted that when abovementioned steps control load 7 arc sag of drawstring, angle control over the ground is no more than 60 degree.
It is further comprising the steps of that operating personnel's seating hanging basket 5 rises to the first 1 position progress block operation of crossing frame：
Operating personnel carries Digiplex and enters in hanging basket 5, manipulates hoisting mechanism 6 by Digiplex to realize
The lift work of hanging basket 5, at this point, except the lifting action of hanging basket 5, remaining action stop on the first car body 17 and the second car body 18
Only.
It is further comprising the steps of before the block operation：
If being greater than or equal to 36 meters across 19 height of object, it is embedding good in advance that the cubic bracing wire connected is fixed on ground
On earth anchor；
If being less than 36 meters across 19 height of object, this step is omitted.
In conclusion crossing frame provided by the invention and its construction method, have the following advantages that：
1. tradition is replaced across frame body using the first car body 17 and the second car body 18, double vehicle work compounds, mechanized construction,
Easy to operate, construction flexibly, peripheral facilities are influenced smaller and save process duration.
2. it ensure that operating personnel in crossing frame uphill process and the operation in crossing frame using safety device
In the process, the first car body 17 and the second car body 18 do not generate remaining any dangerous play in addition to 5 lifting action of hanging basket, ensure that
The safety of operating personnel.
3. using support device, ensure crossing frame in long working, do not occur due to hydraulic pressure reveal frame body movement or
The postures such as angle change change phenomenon, cause block height change and cause the generation of accident.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modifications, equivalent replacements and improvements are made should all be included in the protection scope of the present invention god.
Claims (4)
1. a kind of crossing frame, which is characterized in that including be movably arranged at cross over object (19) both sides the first car body (17) and
Second car body (18), first car body (17) and the second car body (18) include crossing frame head (1), vehicle frame (4), arm support (3)
With arm head platform (2), wherein,
Vehicle frame (4) bottom is provided with walking mechanism, and swing mechanism is provided on the vehicle frame (4)；
The arm support (3) is installed on swing mechanism, and jib lubbing mechanism and hoisting mechanism (6) are provided on the arm support (3)；
The arm head platform (2) is mounted on the head of arm support (3)；
The crossing frame head (1) is mounted on arm head platform (2)；
It is connected for manned hanging basket (5) with the suspension hook on hoisting mechanism (6)；
The crossing frame further includes the block device for block operation；
Safety device is additionally provided on first car body (17) and the second car body (18), the safety device starts
When, except the lifting action of hanging basket (5), remaining action stop on first car body (17) and the second car body (18)；
The safety device is installed in the control cabinl pulpit of first car body (17) and the second car body (18), and passes through manipulation
Indoor control switch control start and stop, the lifting action of hanging basket (5) are grasped with taking the remote controler of the operating personnel of hanging basket (5) carrying
It acts as priority；
When the height across object (19) is less than 36 meters, bracing wire connecting component is not provided on the crossing frame head (1)；Or, institute
When the height stated across object (19) is greater than or equal to 36 meters, bracing wire connecting component is provided on the crossing frame head (1)；
The block device includes load drawstring (7), monolithic coaster (8) and guide rope (9), the quantity of the load drawstring (7)
For two, the monolithic coaster (8) suspension is arranged at the both ends of the crossing frame head (1), and the one of two load drawstrings (7)
End is connected by monolithic coaster (8) with guide rope (9)；
The block device further includes traction rope (10), is both provided with two traction ropes (10) on the every guide rope (9), often
One end of traction rope described in root (10) is connected with guide rope (9), and the other end is fixedly installed on arm head platform (2)；
Equally spacedly suspension is provided with multiple U-shaped rings (11) on the every load drawstring (7), under each U-shaped ring (11)
End is linked with insulating bar (12), and the operating personnel on the second car body (18) is by traction rope (10) by insulating bar (12) from the first vehicle
Body (17) guides the second car body (18) into.
2. crossing frame according to claim 1, which is characterized in that set on first car body (17) and the second car body (18)
It is equipped with to prevent the support device that arm support (3) posture changes, the support is arranged between turntable (13) and arm support (3).
3. crossing frame according to claim 2, which is characterized in that the support device includes length-adjustable pulling plate
(14), described pulling plate (14) one end is fixedly installed on turntable (13) afterbody, and the other end is fixedly installed on arm support (3) afterbody.
4. a kind of cross over frame construction method, which is characterized in that comprises the following steps：
First car body (17) and the second car body (18) stop respectively to the both sides across object (19), support lift frame (4), the first car body
(17) and the tire of the second car body (18) departs from ground；
Operating personnel by jib lubbing mechanism and swing mechanism, by arm support (3) rise width and returning back to be suitble to assembling arm head platform (2) with
And the position of crossing frame head (1)；
Crossing frame head (1) and arm head platform (2) are assembled to arm support (3) head, arm support (3) is manipulated after finishing and plays width, grasp simultaneously
Making hoisting mechanism (6) makes suspension hook drop down onto ground, and hanging basket (5) is sling, and has continued width to arm head platform (2) in horizontal level, behaviour
Vertical swing mechanism extremely will cross over direction, elongation arm support (3) to will spanning height, confirm position it is correct after, hanging basket (5) is put
To ground or vehicle frame (4)；
Operating personnel takes hanging basket (5) and rises to the progress block operation of crossing frame head (1) position；
It is further comprising the steps of that operating personnel's seating hanging basket (5) rises to the progress block operation of crossing frame head (1) position：
Operating personnel carries Digiplex and enters in hanging basket (5), manipulates hoisting mechanism (6) by Digiplex to realize
The lift work of hanging basket (5), at this point, except the lifting action of hanging basket (5) on the first car body (17) and the second car body (18), remaining
Action stops；
It is further comprising the steps of before the block operation：
If being highly greater than or equal to 36 meters across object (19), the cubic bracing wire connected is fixed on ground embedding good ground in advance
On anchor；
If being highly less than 36 meters across object (19), this step is omitted；
The block operation comprises the following steps：
The guide rope (9) on the first car body (17) is drawn to the second car body (18) using unmanned vehicle or propeller-parachuting, by
Operating personnel on second car body (18) receives guide rope (9), by the monolithic coaster (8) of crossing frame head (1), extends to another
Hand until load drawstring (7) guiding to the second car body (18) is landed, after controlling load drawstring (7) arc sag, then is used in the ground of side
Cucurbit is pulled to fix；
While operating personnel receives guide rope (9), traction rope (10) is pulled to and is fixed on the second car body (18)；
After the block end of job, the tension of load drawstring (7) is adjusted.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510687603.8A CN105226560B (en) | 2015-10-21 | 2015-10-21 | A kind of crossing frame and its construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510687603.8A CN105226560B (en) | 2015-10-21 | 2015-10-21 | A kind of crossing frame and its construction method |
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| CN105226560A CN105226560A (en) | 2016-01-06 |
| CN105226560B true CN105226560B (en) | 2018-05-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106451200A (en) * | 2016-07-01 | 2017-02-22 | 浙江浙电经济技术研究院 | London tower bridge type non-powercut spanning system and spanning method of power transmission line |
| CN106159793A (en) * | 2016-07-21 | 2016-11-23 | 安徽华电工程咨询设计有限公司 | A kind of quickly transition assembled is from lifting crossing frame |
| CN109038364A (en) * | 2018-08-08 | 2018-12-18 | 安徽送变电工程有限公司 | A kind of fast reserve crossover device for transmission line of electricity crossing construction |
| CN109494621B (en) * | 2018-12-29 | 2020-05-15 | 国家电网有限公司 | Power transmission line blocking device |
| CN110282509A (en) * | 2019-07-23 | 2019-09-27 | 广东电网有限责任公司 | A kind of electric power network leap wiring winding integrated apparatus |
| CN110492391A (en) * | 2019-09-16 | 2019-11-22 | 杨平 | Jacking type full protection crossing frame and its building method |
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| JP4277281B2 (en) * | 2004-05-20 | 2009-06-10 | 川北電気工業株式会社 | Hanging wire type transfer method by net formation |
| CN102966087B (en) * | 2012-12-18 | 2015-04-22 | 中联重科股份有限公司 | Boom lifting device and engineering machine with same |
| CN103296616B (en) * | 2013-06-27 | 2017-02-15 | 国家电网公司 | Rigid crossing support and crossing method for construction of overhead transmission lines |
| CN104909312A (en) * | 2015-06-02 | 2015-09-16 | 三一汽车起重机械有限公司 | Electric operating vehicle |
| CN205429566U (en) * | 2015-10-21 | 2016-08-03 | 三一汽车起重机械有限公司 | Crossing structure |
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