CN109594709A - Partial precast assembled steel and regeneration concrete compoboard and production, assembly method - Google Patents
Partial precast assembled steel and regeneration concrete compoboard and production, assembly method Download PDFInfo
- Publication number
- CN109594709A CN109594709A CN201811319440.8A CN201811319440A CN109594709A CN 109594709 A CN109594709 A CN 109594709A CN 201811319440 A CN201811319440 A CN 201811319440A CN 109594709 A CN109594709 A CN 109594709A
- Authority
- CN
- China
- Prior art keywords
- compoboard
- regeneration concrete
- plate
- bottom plate
- assembled steel
- Prior art date
- 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.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
- E04C2/28—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups combinations of materials fully covered by groups E04C2/04 and E04C2/08
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Panels For Use In Building Construction (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a kind of partial precast assembled steels and regeneration concrete compoboard, including compoboard bottom plate, it is vertically affixed on compoboard bottom plate that there are two side plates, two side plates are oppositely arranged, multiple shear connectors are connected on the compoboard bottom plate of two side sheet rooms, two side sheet rooms are filled with regeneration concrete, and two side sheet rooms are also equipped with steel mesh.The invention also discloses the production of a kind of partial precast assembled steel and regeneration concrete compoboard, assembly method.Compoboard of the invention, enabling to fashioned iron and regeneration concrete, preferably common stress realizes compatibility of deformation.The production method of compoboard of the invention is simple, and assembly method is quick, and industrial mass is suitble to use.
Description
Technical field
The invention belongs to technical field of structural engineering, it is related to a kind of partial precast assembled steel and is combined with regeneration concrete
Plate, the invention further relates to the production method of the compoboard and assembly methods.
Background technique
Regeneration concrete is a kind of effective way for handling a large amount of building wastes, it recycles discarded concrete, no
It only can solve the waste and old concrete faced at present problem to be processed, a considerable amount of husky, stones and cement etc. can also be saved and built
Material is built, is of great significance to realizing Sustainable Construction Industry, establishing friendly environment society.In addition, steel and regeneration
Concrete combined board is a kind of novel structure type, has many advantages, such as that load-carrying properties are good, seismic energy dissipation ability is strong.But pass through
A large amount of engineering practice discoveries, the cohesive force between fashioned iron and regeneration concrete material is poor, needs to be arranged a large amount of shear connections
Part could make fashioned iron and regeneration concrete material preferably realize that compatibility of deformation works together, and shear connector is constructed
It is complex.
Summary of the invention
The object of the present invention is to provide a kind of partial precast assembled steels and regeneration concrete compoboard, enable to fashioned iron
Preferably common stress realizes compatibility of deformation with regeneration concrete；It is a further object to provide the production of the compoboard
Method；The present invention also provides the assembly methods of the compoboard.
The first technical solution of the present invention is, a kind of partial precast assembled steel is combined with regeneration concrete
Plate, including compoboard bottom plate, vertical affixed there are two side plate on compoboard bottom plate, two side plates are oppositely arranged, two side sheet rooms
Compoboard bottom plate on be connected with multiple shear connectors, two side sheet rooms are filled partially with regeneration concrete, two side sheet rooms
It is also equipped with steel mesh, steel mesh is located at the top of two side plates.
The characteristics of the first technical solution of the invention, also resides in:
It is provided with multiple threaded holes on each side plate, is equipped with stud on each threaded hole.
Multiple floors are also connected on compoboard bottom plate, each floor is parallel with side plate, between any two adjacent floors
Compoboard bottom plate on be equipped with shear connector.
Multiple shear studs are connected on the compoboard bottom plate of each floor and side sheet room.
Shear connector includes bottom plate, is vertically connected with connecting plate and two inclined plates on bottom plate, and the one of an inclined plate and connecting plate
Side is affixed, and another side of another inclined plate and connecting plate is affixed.
Two inclined plates are tilted to the not ipsilateral of connecting plate respectively, and two angles between inclined plate and connecting plate are no more than friction
Angle.
Connecting plate threaded hole is provided on connecting plate, every two adjacent shear connector is oppositely arranged, and every two adjacent anti-
It cuts and is connected by screwed connecting rod between connector.
Through-hole is provided on each connecting plate.
Second of technical solution that the present invention uses is:
A kind of production method of partial precast assembled steel and regeneration concrete compoboard, specifically as steps described below into
Row:
Step 1, then affixed multiple on compoboard bottom plate in affixed two side plates of side edge close to compoboard bottom plate
The floor parallel with side plate；
Step 2, affixed multiple shear connectors on the compoboard bottom plate between any two floors；
Step 3, regeneration concrete is poured between any two floors and it vibrates uniformly.
The third technical solution of the invention is:
A kind of assembly method of partial precast assembled steel and regeneration concrete compoboard, specifically as steps described below into
Row:
Step a, two adjacent compoboards are placed side by side, two adjacent compoboards are connected using stud and bolt
It connects；
Step b, affixed shear stud on the compoboard bottom plate between each side plate and floor, is arranged in side plate for steel mesh
Top；
Step c pours regeneration concrete between side plate and floor, so that regeneration concrete did not had steel mesh.
The beneficial effects of the present invention are:
A kind of partial precast assembled steel of the present invention and regeneration concrete compoboard, have very between fashioned iron and regeneration concrete
Strong resistant slide ability, so that preferably common stress realizes compatibility of deformation for fashioned iron and regeneration concrete.A kind of part of the present invention
The production method of prefabricated assembled steel and regeneration concrete compoboard is simple, and assembly method is quick, and industrial mass is suitble to use.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of partial precast assembled steel and regeneration concrete compoboard of the present invention；
Fig. 2 is a kind of side view of partial precast assembled steel and regeneration concrete compoboard of the present invention；
Fig. 3 is that a kind of partial precast assembled steel of the present invention and the installation of shear connector in regeneration concrete compoboard are shown
It is intended to；
Fig. 4 is that a kind of partial precast assembled steel of the present invention and the structure of shear connector in regeneration concrete compoboard are shown
It is intended to；
The connection of two shear connectors in a kind of partial precast assembled steel of Fig. 5 present invention and regeneration concrete compoboard
Schematic diagram.
In figure, 1. compoboard bottom plates, 2. side plates, 3. shear connectors, 3-1. bottom plate, 3-2. connecting plate, 3-3. inclined plate, 3-4.
Connecting rod, 3-5. through-hole, 3-6, connecting plate threaded hole, 4. steel meshes, 5. threaded holes, 6. studs, 7. floors, 8. shear studs.
Specific embodiment
The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
A kind of partial precast assembled steel and regeneration concrete compoboard, as shown in Figure 1, Figure 2 and Figure 3, including compoboard
Bottom plate 1, on compoboard bottom plate 1 it is vertical it is affixed there are two side plate 2 and multiple floors 7, each side plate 2 and each floor 7 are parallel
Setting, and floor 7 is located between two side plates 2, and shearing resistance company is connected on the bottom plate of connecting plate 1 between any two adjacent floors 7
Fitting 3 is vertically connected with connecting plate 3-2 and two on bottom plate 3-1 as shown in figure 4, each shear connector 3 includes bottom plate 3-1
Inclined plate 3-3, a side of an inclined plate 3-3 and connecting plate 3-2 is affixed, another side of another inclined plate 3-3 and connecting plate 3-2 are solid
It connects；Two inclined plate 3-3 are tilted to the not ipsilateral of connecting plate 3-2 respectively, and the angle between two inclined plate 3-3 and connecting plate 3-2 is not
Greater than angle of friction；As shown in figure 5, connecting plate threaded hole 3-6 and through-hole 3-5 is provided on each connecting plate 3-2, it is every two adjacent anti-
It cuts connector 3 to be oppositely arranged, and passes through screwed connecting rod 3-4 connection between every two adjacent shear connector 3.
Regeneration concrete is filled between any two adjacent floors 7；On compoboard bottom plate 1 between each floor 7 and side plate 2
Multiple shear studs 8 are connected with, multiple threaded holes 5 are provided on each side plate 2, are equipped with stud on each threaded hole 5
6；Steel mesh 4 is also equipped between two side plates 2, steel mesh 4 is located at the top of two side plates 2.
In a kind of partial precast assembled steel of the present invention and regeneration concrete compoboard, floor 7 and side plate 2 can not only fill
Work as template, additionally it is possible to enhance the anti-bending bearing capacity of this compoboard；Stud 6 on side plate 2 can not only be adjacent for connecting two
Compoboard, enhance the bonding strength of two adjacent compoboards, additionally it is possible to regard shearing-resistant member, reduce side plate 2 and regeneration coagulation
Sliding between soil；Shear stud 8 can also reduce the sliding between regeneration concrete and compoboard bottom plate 1；Any two are adjacent
Floor 7 between shear connector 3 interfacial adhesions that can be improved compoboard bottom plate 1 Yu regeneration concrete；Two inclined plates
3-3 is tilted to the not ipsilateral of connecting plate 3-2 respectively, angle between two inclined plate 3-3 and connecting plate 3-2 no more than angle of friction,
The ability that compoboard bottom plate 1 resists the shearing of connecting plate 3-2 length direction can be enhanced；Through-hole 3-5 on connecting plate 3-2 can enhance
The cohesive force of connecting plate 3-2 and regeneration concrete；Two adjacent shear connectors 3 are connected using connecting rod 3-4, enable to shearing resistance
There is preferable globality between connector 3, enhance the shearing resistance range of shear connector 3, and then reduce compoboard bottom plate 1 and regeneration
Interface sliding between concrete, while can also save the construction time.
A kind of production method of partial precast assembled steel and regeneration concrete compoboard, specifically as steps described below into
Row:
Step 1, then affixed on compoboard bottom plate 1 in affixed two side plates 2 of side edge close to compoboard bottom plate 1
Multiple floors 7 parallel with side plate 2；
Step 2, affixed multiple shear connectors 3 on the compoboard bottom plate 1 between any two floors 7；
Step 3, regeneration concrete is poured between any two floors 7 and it vibrates uniformly.
A kind of assembly method of partial precast assembled steel and regeneration concrete compoboard, specifically as steps described below into
Row:
Step a, two adjacent compoboards are placed side by side, two adjacent compoboards are connected using stud 6 and bolt
It connects；
Step b, affixed shear stud 8 on the compoboard bottom plate 1 between each side plate 2 and floor 7, steel mesh 4 is arranged
Above side plate 2；
Step c pours regeneration concrete between side plate 2 and floor 7, so that regeneration concrete did not had steel mesh 4.
A kind of partial precast assembled steel of the present invention and regeneration concrete compoboard, have very between fashioned iron and regeneration concrete
Strong resistant slide ability, so that preferably common stress realizes compatibility of deformation for fashioned iron and regeneration concrete；It is only needed when site operation
Regeneration concrete is poured between the floor and side plate of compoboard, speed of application is fast, and production is simple, easy to assembly, is convenient for work
Industryization batch uses.
Claims (9)
1. a kind of partial precast assembled steel and regeneration concrete compoboard, which is characterized in that including compoboard bottom plate (1), institute
State on compoboard bottom plate (1) vertical affixed there are two side plate (2) and multiple floors (7), two side plates (2) and multiple floors
(7) mutually parallel, each floor (7) is respectively positioned between two side plates (2), the combination between any two adjacent floors (7)
It is connected with multiple shear connectors (3) on board bottom plate (1), regeneration concrete is filled between any two adjacent floors (7),
It is also equipped with steel mesh (4) between two side plates (2), the steel mesh (4) is located at two side plate (2) tops.
2. a kind of partial precast assembled steel according to claim 1 and regeneration concrete compoboard, which is characterized in that every
It is provided with multiple threaded holes (5) on a side plate (2), is equipped with stud (6) on each threaded hole (5).
3. a kind of partial precast assembled steel according to claim 1 and regeneration concrete compoboard, which is characterized in that every
Multiple shear studs (8) are connected on compoboard bottom plate (1) between a floor (7) and side plate (2).
4. a kind of partial precast assembled steel according to claim 1 and regeneration concrete compoboard, which is characterized in that institute
Stating shear connector (3) includes bottom plate (3-1), is vertically connected with connecting plate (3-2) and two inclined plate (3- on the bottom plate (3-1)
3), an inclined plate (3-3) and a side of connecting plate (3-2) are affixed, another described inclined plate (3-3) and connecting plate (3-2)
Another side is affixed.
5. a kind of partial precast assembled steel according to claim 4 and regeneration concrete compoboard, which is characterized in that two
A inclined plate (3-3) tilts to the not ipsilateral of connecting plate (3-2) respectively, between two inclined plates (3-3) and connecting plate (3-2)
Angle no more than angle of friction.
6. a kind of partial precast assembled steel according to claim 4 and regeneration concrete compoboard, which is characterized in that institute
It states and is provided on connecting plate (3-2) connecting plate threaded hole (3-6), every two adjacent shear connector (3) is oppositely arranged, and every two phase
It is connected between adjacent shear connector (3) by screwed connecting rod (3-4).
7. a kind of partial precast assembled steel according to claim 4 and regeneration concrete compoboard, which is characterized in that every
Through-hole (3-5) is provided on a connecting plate (3-2).
8. a kind of production method of partial precast assembled steel and regeneration concrete compoboard, which is characterized in that specifically under
State step progress:
Step 1, then solid on compoboard bottom plate (1) in affixed two side plates (2) of side edge close to compoboard bottom plate (1)
Connect multiple floors parallel with side plate (2) (7)；
Step 2, affixed multiple shear connectors (3) on the compoboard bottom plate (1) between any two floors (7)；
Step 3, regeneration concrete is poured between any two floors (7) and it vibrates uniformly.
9. a kind of assembly method of partial precast assembled steel and regeneration concrete compoboard, which is characterized in that specifically under
State step progress:
Step a, two adjacent compoboards are placed side by side, two adjacent compoboards using stud (6) and are bolted；
Step b, affixed shear stud (8) on the compoboard bottom plate (1) between each side plate (2) and floor (7), by steel mesh
(4) it is arranged in above side plate (2)；
Step c pours regeneration concrete between side plate (2) and floor (7), so that regeneration concrete did not had steel mesh (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811319440.8A CN109594709B (en) | 2018-11-07 | 2018-11-07 | Partially prefabricated assembled steel and recycled concrete composite board and manufacturing and assembling method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811319440.8A CN109594709B (en) | 2018-11-07 | 2018-11-07 | Partially prefabricated assembled steel and recycled concrete composite board and manufacturing and assembling method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109594709A true CN109594709A (en) | 2019-04-09 |
| CN109594709B CN109594709B (en) | 2021-05-25 |
Family
ID=65957611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811319440.8A Active CN109594709B (en) | 2018-11-07 | 2018-11-07 | Partially prefabricated assembled steel and recycled concrete composite board and manufacturing and assembling method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109594709B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11843252B2 (en) | 2021-11-30 | 2023-12-12 | General Electric Company | System and method for damping sub-synchronous control interactions in a grid-forming inverter-based resource |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060022322A (en) * | 2004-09-07 | 2006-03-10 | 한국건설기술연구원 | Composite slab and the joint structure |
| CN201172796Y (en) * | 2008-04-03 | 2008-12-31 | 长安大学 | Steel box girder bridge deck structure with upper longitudinal ribs |
| CN102587665A (en) * | 2012-03-21 | 2012-07-18 | 苏州第五建筑集团有限公司 | Pouring method of coupled shear wall structure |
| CN103194969A (en) * | 2013-04-07 | 2013-07-10 | 山东大学 | FRP (Fiber Reinforce Plastic)-concrete combined bridge deck |
| CN103835234A (en) * | 2014-03-30 | 2014-06-04 | 黄海林 | FRP component with ribs and construction method for combination between FRP component and concrete |
| CN203795307U (en) * | 2014-03-30 | 2014-08-27 | 黄海林 | Ribbed FRP (fiber reinforce plastic) component |
| CN105113405A (en) * | 2015-08-21 | 2015-12-02 | 同济大学 | Composite bridge deck based on steel and UHPC (Ultra High Performance Concrete) |
| CN105648909A (en) * | 2016-01-04 | 2016-06-08 | 湖南工业大学 | Fabricated combined bridge deck structure provided with grid type connector and construction method thereof |
| CN105908881A (en) * | 2016-06-02 | 2016-08-31 | 中国矿业大学 | Novel bidirectional inverted-T-shaped beam combined floor |
| CN206987148U (en) * | 2017-07-19 | 2018-02-09 | 三一筑工科技有限公司 | Concrete prefabricated board and laminated floor slab |
| CN107938511A (en) * | 2017-10-18 | 2018-04-20 | 重庆大学 | A kind of orthotropic plate concrete combined bridge deck and its construction method |
| CN207331457U (en) * | 2017-06-26 | 2018-05-08 | 安徽省交通规划设计研究总院股份有限公司 | A kind of assembled branch line overpass steel plate combination beam bridge |
| CN207331459U (en) * | 2017-10-18 | 2018-05-08 | 重庆大学 | A kind of orthotropic plate-concrete combined bridge deck |
| CN108222372A (en) * | 2018-02-05 | 2018-06-29 | 沈阳建筑大学 | Shear connector and preparation method thereof and profile steel concrete column and its pouring procedure |
-
2018
- 2018-11-07 CN CN201811319440.8A patent/CN109594709B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060022322A (en) * | 2004-09-07 | 2006-03-10 | 한국건설기술연구원 | Composite slab and the joint structure |
| CN201172796Y (en) * | 2008-04-03 | 2008-12-31 | 长安大学 | Steel box girder bridge deck structure with upper longitudinal ribs |
| CN102587665A (en) * | 2012-03-21 | 2012-07-18 | 苏州第五建筑集团有限公司 | Pouring method of coupled shear wall structure |
| CN103194969A (en) * | 2013-04-07 | 2013-07-10 | 山东大学 | FRP (Fiber Reinforce Plastic)-concrete combined bridge deck |
| CN103835234A (en) * | 2014-03-30 | 2014-06-04 | 黄海林 | FRP component with ribs and construction method for combination between FRP component and concrete |
| CN203795307U (en) * | 2014-03-30 | 2014-08-27 | 黄海林 | Ribbed FRP (fiber reinforce plastic) component |
| CN105113405A (en) * | 2015-08-21 | 2015-12-02 | 同济大学 | Composite bridge deck based on steel and UHPC (Ultra High Performance Concrete) |
| CN105648909A (en) * | 2016-01-04 | 2016-06-08 | 湖南工业大学 | Fabricated combined bridge deck structure provided with grid type connector and construction method thereof |
| CN105908881A (en) * | 2016-06-02 | 2016-08-31 | 中国矿业大学 | Novel bidirectional inverted-T-shaped beam combined floor |
| CN207331457U (en) * | 2017-06-26 | 2018-05-08 | 安徽省交通规划设计研究总院股份有限公司 | A kind of assembled branch line overpass steel plate combination beam bridge |
| CN206987148U (en) * | 2017-07-19 | 2018-02-09 | 三一筑工科技有限公司 | Concrete prefabricated board and laminated floor slab |
| CN107938511A (en) * | 2017-10-18 | 2018-04-20 | 重庆大学 | A kind of orthotropic plate concrete combined bridge deck and its construction method |
| CN207331459U (en) * | 2017-10-18 | 2018-05-08 | 重庆大学 | A kind of orthotropic plate-concrete combined bridge deck |
| CN108222372A (en) * | 2018-02-05 | 2018-06-29 | 沈阳建筑大学 | Shear connector and preparation method thereof and profile steel concrete column and its pouring procedure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11843252B2 (en) | 2021-11-30 | 2023-12-12 | General Electric Company | System and method for damping sub-synchronous control interactions in a grid-forming inverter-based resource |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109594709B (en) | 2021-05-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105201079A (en) | Floorslab and wallboard welding technique | |
| CN105421614B (en) | The construction method of precast shear wall dry type vertical connection nodes | |
| CN109594709A (en) | Partial precast assembled steel and regeneration concrete compoboard and production, assembly method | |
| CN206829461U (en) | After pour teeth groove and be linked and packed formula precast slab | |
| CN103018114B (en) | A kind of external prestressing precast assembly concrete component seam shear strength test device | |
| CN109518603A (en) | A kind of efficient steel-mixes combined bridge deck structure of transvers plate and usage | |
| CN203808262U (en) | Prefabricated superimposed main beam and auxiliary beam connecting structure | |
| CN203514528U (en) | Composite connection structure of concrete filled steel tubular column and thin steel plate shear wall | |
| CN105735529B (en) | A kind of stull formula steel frame steel plate shear wall structure being easily assembled | |
| CN209443657U (en) | A kind of partial precast assembled steel and regeneration concrete compoboard | |
| CN110424534A (en) | A kind of prefabricated assembled non-reinforced concrete frame and its construction method | |
| JP6997486B1 (en) | New precast assembled pier | |
| CN109779290A (en) | A kind of dismounting brick masonry wall piece prestressed anchor clamping method | |
| CN210563529U (en) | Reinforcing apparatus and brickwork assembly for brickwork | |
| CN205206112U (en) | Novel three -dimensional steel bar truss building carrier plate | |
| CN206646649U (en) | The connecting joint structure of column and girder steel | |
| CN204326490U (en) | A kind of construction of lift well operating platform | |
| CN112376738A (en) | Steel wire mesh coal gangue concrete assembled shear wall and construction method thereof | |
| CN209538391U (en) | Reduce the PBL self-locking plate and shear connector of regeneration concrete and fashioned iron sliding | |
| CN203878779U (en) | Rectangular concrete-filled steel tube column and I-steel beam rebar penetrating type joint | |
| CN208023811U (en) | A kind of prefabricated laminate of novel superposing type | |
| CN204919872U (en) | Shear force wall transform structure | |
| CN207526119U (en) | A kind of reinforcement tools of regularization outer wall template | |
| CN207003738U (en) | A kind of prefabricated steel faced wall with stirrup | |
| CN204920235U (en) | Steel bar truss board construction special spanner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |