CN111424900A - Steel structure beam type sliding stair and construction method - Google Patents
Steel structure beam type sliding stair and construction method Download PDFInfo
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- CN111424900A CN111424900A CN202010236375.3A CN202010236375A CN111424900A CN 111424900 A CN111424900 A CN 111424900A CN 202010236375 A CN202010236375 A CN 202010236375A CN 111424900 A CN111424900 A CN 111424900A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
- E04F11/022—Stairways; Layouts thereof characterised by the supporting structure
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- Steps, Ramps, And Handrails (AREA)
Abstract
The invention belongs to the technical field of steel structure building design, and particularly relates to a steel structure beam type sliding stair and a construction method. The invention is composed of a stair foundation, a limiting sliding device, a bottom layer frame beam and a structural frame beam with a projecting lug, a double-sleeve limiting connector and a rubber pin shaft connecting piece; the limiting sliding device is connected to the beam type stair foundation; the lower part of the stair beam is connected with a beam type stair foundation through a limiting sliding device; the non-bottom layer stair beam is detachably connected with a double-sleeve limiting connector with a lifting lug and a structural frame beam of the rubber pin shaft connecting piece. The invention provides a steel structure beam type sliding stair and a construction method, wherein the steel structure beam type sliding stair can effectively reduce the risk of damaging a structural main body before a staircase under an earthquake working condition, reduce the field welding workload, simplify the design flow, improve the construction efficiency and enable the use structure to be safer and more reliable.
Description
Technical Field
The invention belongs to the technical field of steel structure buildings, and particularly relates to a steel structure beam type sliding stair and a construction method thereof.
Background
With the increase of steel structure buildings, more and more multi-storey and high-rise steel structure buildings appear in our lives, however, the design of the steel structure stairs always troubles structural designers, the conventional beam type steel structure stairs are generally rigidly connected with a main structure by adopting a welding method, and the method has the following defects:
1. the stress of the node area is complex, and the welded nodes are adopted, so that not only is the vertical shear force transmitted, but also a larger node bending moment is transmitted under the action of earthquake force. The traditional welding connection causes the connection part of the beam type stair joint to bear larger bending moment before the structural body is damaged.
2. The structural earthquake-resistant design is required by specification, the building stairwell is separated from the main structure effectively, and the whole stress calculation of the structure is not participated; if the structural design does not adopt corresponding construction measures to effectively separate the staircase from the main structure, the staircase has higher rigidity and needs to participate in the overall stress calculation of the structure, which leads to further aggravation of the structural calculation.
3. The stairwell is often the key point of structural design as an important escape route in the disaster process. Traditional steel structure beam type stair leads to under the earthquake effect because of the design defect, and the great moment of flexure will be born and destroyed prior to the main structure body in the staircase node position, can't guarantee the safety of passway for escaping effective.
4. The welding connection is not beneficial to efficient construction, and the partial prefabricated steel components cannot be spliced and installed on site quickly and reasonably.
Disclosure of Invention
The invention provides a steel structure beam type sliding stair and a construction method, and aims to provide the steel structure beam type sliding stair and the construction method which can effectively reduce the risk that a stair well is damaged before a structure body under an earthquake working condition, reduce the on-site welding workload, simplify the design flow, improve the construction efficiency, and enable the use structure to be safer and more reliable.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a steel construction beam type sliding stair, includes stair foundation, structure bottom frame ladder beam and platform roof beam at least, structure bottom frame ladder beam upper portion can dismantle its characterized in that through bolt and platform roof beam: the device also comprises a limiting sliding device, a non-bottom-layer frame beam, a structural frame beam and a connecting mechanism; the lower part of the ladder beam of the framework at the bottom layer of the structure is connected with the stair foundation through the limiting sliding device; two sides of the structural frame beam are respectively provided with a picking lug, and the middle part of the non-bottom layer frame beam is provided with a picking lug; the lugs are reserved with through holes, and the connecting mechanism connects and fixes the non-bottom-layer frame beam and the structural frame beam through the through holes of the lugs on the non-bottom-layer frame beam and the structural frame beam.
The limiting sliding device comprises an embedded part, an embedded bolt, a steel plate and an anchoring steel bar; the embedded part is embedded in the beam type stair foundation, and the anchoring steel bar is connected to the lower surface of the embedded part; the steel plate is connected to the upper surface of the embedded part; the centers of the embedded part and the steel plate are respectively provided with a reserved bolt hole; the embedded bolt is connected in the reserved bolt hole.
The anchoring steel bar adopts 2 phi 8.
The embedded part and the anchoring steel bar are connected in a welding mode.
The embedded parts are embedded along the length direction of the steps.
And stiffening plates are arranged on the bottom surface of the lower part of the ladder beam of the framework at the bottom layer of the structure.
The connecting mechanism comprises a rubber pin shaft connecting piece and a double-sleeve spring limiting connector; a central through hole is reserved in the center of the picking lug, and a plurality of connecting through holes are reserved in an array by taking the central through hole as a center; the rubber pin shaft connecting piece is connected in the central through holes of the upper lugs of the non-bottom-layer frame beam and the structural frame beam; the double-sleeve spring limiting connector is connected in the connecting through hole of the upper cantilever lug of the non-bottom-layer frame beam and the structural frame beam.
The double-sleeve spring limiting connector comprises a limiting spring, a connecting bolt and a steel sleeve; two end heads of the steel sleeve are respectively provided with a connecting bolt; two limiting spring grooves are symmetrically arranged on the steel sleeve between the two connecting bolts, and limiting springs are respectively sleeved in the two limiting spring grooves.
The steel sleeve is a double-layer Q355 steel sleeve with threaded sleeve buttons arranged at two ends.
The connecting ends of the structural frame beam and the structural bottom layer frame ladder beam and the connecting ends of the structural frame beam and the platform beam are provided with matched connecting through holes, and the structural frame beam, the stair ladder beam, the structural frame beam and the platform beam are connected through bolts penetrating through the connecting through holes.
The connecting through hole is a circular or oval through hole.
A construction method of a steel structure beam type sliding stair comprises the following steps:
the method comprises the following steps: embedding an embedded part on the beam type stair foundation, and welding an anchoring reinforcing steel bar on the embedded part; penetrating through the reserved bolt hole of the embedded part and embedding the bolt;
step two: embedding a steel plate on the embedded part, welding the steel plate and the embedded part, and enabling an embedded bolt to penetrate through a reserved bolt hole on the steel plate;
step three: connecting a stiffening plate at the bottom of the ladder beam of the framework at the bottom layer of the structure;
step four: connecting the structural frame beam with the lifting lug with the non-bottom-layer frame beam through a rubber pin shaft connecting piece;
step five: and inserting the double-sleeve spring limiting connector into the connecting through holes of the upper cantilever lugs of the structural frame beam and the non-bottom-layer stair beam, and fixing two ends of the double-sleeve spring limiting connector by screws.
Has the advantages that:
1. the novel steel structure beam type stair node is adopted, standardized design, factory batch production and field installation and construction can be realized, the field engineering construction progress is improved, the engineering quality is convenient to control, and the idea and the guideline for popularizing green construction are met.
2. The invention provides a novel connecting method of the beam type steel structure stair nodes, which simplifies the stress of the nodes and ensures the safety of 'life evacuation channels' in the process of taking the stair rooms as disasters.
3. According to the novel node, the sliding limiting device is arranged in the node area connected with the beam type stair beams, so that the bending moment of the node is released, the steel structure stair is effectively separated from the main structure in the calculation process, the stress state of the original structure is clear, and the design workload is reduced.
4. The invention effectively reduces the stress concentration of the node area caused by welding of the traditional beam type steel structure stair.
5. The invention has good applicability to the beam type stairs of the multi-layer steel structure building and has great popularization value.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to clearly understand the technical solutions of the present invention and to implement the technical solutions according to the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a detailed view of the present invention in connection with a foundation;
fig. 2 is a schematic structural view of the insert 2 of the invention;
FIG. 3 is a schematic diagram of the basic structure of the connection of the present invention;
FIG. 4 is a detailed view of the bottom end beam stair attachment of the present invention;
FIG. 5 is a detail view of the high end beam stair attachment of the present invention;
FIG. 6 is a schematic view of the ladder beam and frame beam slide stop of the present invention;
FIG. 7 is a cross-sectional view at A-A of FIG. 6 of the present invention;
FIG. 8 is a schematic view of a dual barrel spring retainer connector of the present invention;
FIG. 9 is a schematic view of a rubber pin connection of the present invention.
In the figure: 1-a stair foundation; 2-embedding; 3, embedding bolts; 4-a steel plate; 5-a stiffening plate; 6-structural bottom layer frame ladder beams; 7-structural frame beams; 8-non-bottom layer frame beam; 9-ear picking; 10-rubber pin shaft connecting piece; 11-double sleeve spring limit connector; 12-threading and threading; 13-anchoring the steel bars; 14-a limit spring; 15-connecting bolts; 16-steel casing.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
according to a steel structure beam type sliding stair that fig. 1-9 show, include stair foundation 1 at least, structure bottom frame terraced roof beam 6 and platform roof beam, 6 upper portions of structure bottom frame terraced roof beam pass through the bolt can dismantle with the platform roof beam and be connected its characterized in that: the device also comprises a limiting sliding device, a non-bottom layer frame beam 8, a structural frame beam 7 and a connecting mechanism; the limiting sliding device is connected to the beam type stair foundation 1, and the lower part of the frame stair beam 6 of the structural bottom layer is connected with the stair foundation 1 through the limiting sliding device; two sides of the structural frame beam 7 are respectively provided with a picking lug 9, and the middle part of the non-bottom layer frame beam 8 is provided with a picking lug 9; choose all to reserve on the ear 9 and have a through-hole, coupling mechanism choose the through-hole of ear 9 on through non-bottom frame roof beam 8 and structural frame roof beam 7 and connect non-bottom frame roof beam 8 and structural frame roof beam 7 fixedly.
When the stair is actually used, a limiting sliding device is prefabricated on the beam type stair foundation 1, and the bottom of a frame ladder beam 6 at the bottom layer of the structure is connected with a stiffening plate 5 and welded with the limiting sliding device; and then connecting the connecting mechanism in the through holes of the upper cantilever lugs 9 of the non-bottom-layer frame beam 8 and the structural frame beam 7 and fixing.
The invention provides a novel technical scheme for connecting the beam type steel structure stair nodes, which simplifies the stress of the nodes and ensures the safety of 'life evacuation channels' in the process of taking the stair rooms as disasters.
The stair beam 6 of the invention adopts a steel structure stair beam.
According to the novel node, the sliding limiting device is arranged in the node area connected with the beam type stair beams, so that the bending moment of the node is released, the steel structure stair is effectively separated from the main structure in the calculation process, the stress state of the original structure is clear, and the design workload is reduced.
The invention effectively reduces the stress concentration of the node area caused by welding of the traditional beam type steel structure stair.
The novel steel structure beam type stair node is adopted, standardized design, factory batch production and field installation and construction can be realized, the field engineering construction progress is improved, the engineering quality is convenient to control, and the idea and the guideline for popularizing green construction are met.
Example two:
according to a steel structure beam type sliding stair shown in figures 1, 2 and 3, the difference from the first embodiment is that: the limiting sliding device comprises an embedded part 2, an embedded bolt 3, a steel plate 4 and an anchoring steel bar 13; the embedded part 2 is embedded in the beam type stair foundation 1, and the anchoring steel bar 13 is connected to the lower surface of the embedded part 2; the steel plate 4 is connected to the upper surface of the embedded part 2; the centers of the embedded part 2 and the steel plate 4 are respectively provided with a reserved bolt hole; the embedded bolt 3 is connected in the reserved bolt hole.
In the time of the in-service use, steel sheet 4 and the welding of structure bottom layer frame ladder beam 6 to adopt embedded bolt 3 to be connected with steel sheet 4. By adopting the technical scheme, the limiting sliding device can effectively release displacement under the action of an earthquake, so that the rigidity of the stair part does not participate in the distribution of the earthquake rigidity.
Example three:
according to a steel structure beam type sliding stair shown in figures 1, 2 and 3, the difference from the second embodiment is that: the anchoring steel bar 13 adopts 2 phi 8.
Furthermore, a welding connection mode is adopted between the embedded part 2 and the anchoring reinforcing steel bar 13.
Furthermore, the embedded part 2 is embedded along the length direction of the step.
In practical use, the anchoring reinforcing steel bars 13 are 2 phi 8, so that the embedded steel plates can be effectively anchored in the bottom foundation, and the friction force generated by displacement of the beam type stairs is effectively transmitted.
The embedded part 2 and the anchoring reinforcing steel bar 13 adopt a welding connection mode; the steel plate 4 is connected with the embedded part 2 through the limiting embedded bolts 3, and the bolt holes especially adopt the oval bolt holes to facilitate effective release displacement.
In actual use, the steel plate 4 and the beam type stair bottom steel plate are arranged in a full-length mode, the steel plate and the beam type stair bottom steel plate are connected through the limiting bolts, relative displacement between the steel plate and the beam type stair bottom steel plate is limited by steel-steel friction force, and therefore the steel plate is beneficial to increasing friction resistance due to the fact that the steel plate is buried in the full-length mode.
Example four:
according to a steel structure beam type sliding stair shown in fig. 1, the difference from the first embodiment is that: and stiffening plates 5 are arranged on the bottom surface of the lower part of the structural bottom layer framework ladder beam 6.
When in actual use, the stiffening plates 5 are arranged on the bottom surface of the lower part of the frame ladder beam 6 at the bottom layer of the structure, so that the strength of the bottom area of the beam type stair is effectively enhanced, and the safety of the beam type sliding stair with the steel structure is ensured.
Example five:
4-9, the difference between the first embodiment and the second embodiment is that: the connecting mechanism comprises a rubber pin shaft connecting piece 10 and a double-sleeve spring limiting connector 11; a central through hole is reserved in the center of the cantilever lug 9, and a plurality of connecting through holes are reserved in an array by taking the central through hole as a center; the rubber pin shaft connecting piece 10 is connected in the central through holes of the upper lug 9 of the non-bottom-layer frame beam 8 and the structural frame beam 7; the double-sleeve spring limiting connector 11 is connected in the connecting through holes of the upper cantilever lugs 9 of the non-bottom-layer frame beam 8 and the structural frame beam 7.
Further, the double-sleeve spring limit connector 11 comprises a limit spring 14, a connecting bolt 15 and a steel sleeve 16; two end heads of the steel sleeve 16 are respectively provided with a connecting bolt 15; two limiting spring grooves are symmetrically arranged on the steel sleeve 16 between the two connecting bolts 15, and limiting springs 14 are sleeved in the two limiting spring grooves respectively.
Furthermore, the steel casing 16 is a double-layer Q355 steel casing with two ends provided with the threaded buckles 12.
In actual use, the rubber pin shaft connecting piece 10 can effectively release the bending moment of the node; the dual-socket spring limit connector 11 can limit the horizontal displacement of the connection node.
Adopt coupling mechanism with above-mentioned node construction mode, release horizontal ground shock power that can be fine. The bolt only plays a role in fixing, and the node only transmits vertical shear force to release bending moment.
Example six:
a construction method of a steel structure beam type sliding stair comprises the following steps:
the method comprises the following steps: embedding an embedded part 2 on a beam type stair foundation 1, and welding an anchoring reinforcing steel bar 13 on the embedded part 2; penetrating through the reserved bolt hole of the embedded part 2, and embedding the bolt 3;
step two: pre-burying a steel plate 4 on the embedded part 2, welding the steel plate 4 with the embedded part 2, and enabling a pre-buried bolt 3 to penetrate through a reserved bolt hole on the steel plate 4;
step three: the bottom of a frame ladder beam 6 of the bottom layer of the structure is connected with a stiffening plate 5;
step four: connecting the structural frame beam 7 with the lifting lugs 9 with the non-bottom layer frame beam 8 through a rubber pin shaft connecting piece 10;
step five: and inserting the double-sleeve spring limiting connector 11 into the connecting through holes of the upper cantilever lugs 9 of the structural frame beam 7 and the non-bottom-layer stair beam 8, and fixing two ends of the double-sleeve spring limiting connector 11 by screws.
In actual use, the steel structure beam type sliding stair constructed by the method can realize standardized design, industrial batch production and field installation and construction, improves the field engineering construction progress, is convenient for controlling the engineering quality, and accords with the idea and the guideline for popularizing green construction. The invention provides a novel connecting method of the beam type steel structure stair nodes, which simplifies the stress of the nodes and ensures the safety of 'life evacuation channels' in the process of taking the stair rooms as disasters. According to the novel node, the sliding limiting device is arranged in the node area connected with the upper beam type stair beam and the lower beam type stair beam, so that the bending moment of the node is released, the steel structure stair is effectively separated from the main structure in the calculation process, the stress state of the original structure is clear, and the design workload is reduced. The invention effectively reduces the stress concentration of the node area caused by welding of the traditional beam type steel structure stair. The invention has good applicability to the beam type stairs of the multi-layer steel structure building and has great popularization value.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
In the case of no conflict, a person skilled in the art may combine the related technical features in the above examples according to actual situations to achieve corresponding technical effects, and details of various combining situations are not described herein.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
The foregoing is illustrative of the preferred embodiments of the present invention, and the present invention is not to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Any simple modification, equivalent change and modification of the above embodiments according to the technical spirit of the present invention still fall within the scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a steel construction beam type sliding stair, includes stair foundation (1), structure bottom frame ladder beam (6) and platform roof beam at least, structure bottom frame ladder beam (6) upper portion is passed through the bolt and can be dismantled its characterized in that with the platform roof beam: the device also comprises a limiting sliding device, a non-bottom-layer frame beam (8), a structural frame beam (7) and a connecting mechanism; the limiting sliding device is connected to the beam type stair foundation (1), and the lower part of the frame stair beam (6) at the bottom layer of the structure is connected with the stair foundation (1) through the limiting sliding device; two sides of the structural frame beam (7) are respectively provided with a picking lug (9), and the middle part of the non-bottom layer frame beam (8) is provided with a picking lug (9); choose all to reserve on ear (9) and have the through-hole, coupling mechanism choose the through-hole of ear (9) on through non-bottom frame roof beam (8) and structural frame roof beam (7) and connect non-bottom frame roof beam (8) and structural frame roof beam (7) fixedly.
2. A steel structure beam type sliding staircase as defined in claim 1, wherein: the limiting sliding device comprises an embedded part (2), an embedded bolt (3), a steel plate (4) and an anchoring steel bar (13); the embedded part (2) is embedded in the beam type stair foundation (1), and the anchoring steel bar (13) is connected to the lower surface of the embedded part (2); the steel plate (4) is connected to the upper surface of the embedded part (2); the centers of the embedded part (2) and the steel plate (4) are respectively provided with a reserved bolt hole; the embedded bolt (3) is connected in the reserved bolt hole.
3. A steel structure beam type sliding staircase as defined in claim 2, wherein: the anchoring steel bar (13) adopts 2 phi 8.
4. A steel structure beam type sliding staircase as defined in claim 2, wherein: the embedded part (2) and the anchoring steel bar (13) adopt a welding connection mode.
5. A steel structure beam type sliding staircase as defined in claim 2, wherein: the embedded parts (2) are embedded in the length direction of the steps.
6. A steel structure beam type sliding staircase as defined in claim 1, wherein: and stiffening plates (5) are arranged on the bottom surface of the lower part of the structural bottom layer framework ladder beam (6).
7. A steel structure beam type sliding staircase as defined in claim 1, wherein: the connecting mechanism comprises a rubber pin shaft connecting piece (10) and a double-sleeve spring limiting connector (11); a central through hole is reserved in the center of the picking lug (9), and a plurality of connecting through holes are reserved in an array by taking the central through hole as the center; the rubber pin shaft connecting piece (10) is connected in the central through hole of the upper lug (9) of the non-bottom-layer frame beam (8) and the structural frame beam (7); the double-sleeve spring limiting connector (11) is connected in a connecting through hole of the upper lug (9) of the non-bottom-layer frame beam (8) and the structural frame beam (7).
8. A steel structure beam type sliding staircase as defined in claim 7, wherein: the double-sleeve spring limiting connector (11) comprises a limiting spring (14), a connecting bolt (15) and a steel sleeve (16); two end heads of the steel sleeve (16) are respectively provided with a connecting bolt (15); two limiting spring grooves are symmetrically arranged on the steel sleeve (16) between the two connecting bolts (15), and limiting springs (14) are sleeved in the two limiting spring grooves respectively.
9. A steel structure beam type sliding staircase as defined in claim 7, wherein: the steel sleeve (16) is a double-layer Q355 steel sleeve with threaded buckles (12) at two ends.
10. A method of constructing a steel structure beam type staircase as defined in any one of claims 1-9, which includes the steps of:
the method comprises the following steps: embedding an embedded part (2) on a beam type stair foundation (1), and welding an anchoring reinforcing steel bar (13) on the embedded part (2); a bolt hole is reserved through the embedded part (2), and a bolt (3) is embedded;
step two: embedding a steel plate (4) on the embedded part (2), welding the steel plate (4) with the embedded part (2), and enabling an embedded bolt (3) to penetrate through a reserved bolt hole on the steel plate (4);
step three: the bottom of a frame ladder beam (6) at the bottom layer of the structure is connected with a stiffening plate (5);
step four: connecting a structural frame beam (7) with a cantilever lug (9) with a non-bottom layer frame beam (8) through a rubber pin shaft connecting piece (10);
step five: the double-sleeve spring limiting connector (11) is inserted into a connecting through hole of an upper lifting lug (9) of the structural frame beam (7) and the non-bottom-layer stair beam (8), and two ends of the double-sleeve spring limiting connector (11) are fixed by screws.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010236375.3A CN111424900B (en) | 2020-03-30 | 2020-03-30 | Steel structure beam type sliding stair and construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010236375.3A CN111424900B (en) | 2020-03-30 | 2020-03-30 | Steel structure beam type sliding stair and construction method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003046A (en) * | 2010-11-26 | 2011-04-06 | 宝业集团浙江建设产业研究院有限公司 | Steel structural staircase for multi-storey industrialized house |
| CN207160450U (en) * | 2017-08-10 | 2018-03-30 | 滨州学院 | A kind of armored concrete quakeproof stair with damping system |
| CN207597754U (en) * | 2017-10-31 | 2018-07-10 | 江苏金贸科技发展有限公司 | A kind of assembled stair attachment device |
| CN208633405U (en) * | 2018-05-18 | 2019-03-22 | 张�浩 | Novel shock insulation stair |
| CN209585463U (en) * | 2018-07-23 | 2019-11-05 | 李藏柱 | A kind of connection structure of precast stair |
-
2020
- 2020-03-30 CN CN202010236375.3A patent/CN111424900B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003046A (en) * | 2010-11-26 | 2011-04-06 | 宝业集团浙江建设产业研究院有限公司 | Steel structural staircase for multi-storey industrialized house |
| CN207160450U (en) * | 2017-08-10 | 2018-03-30 | 滨州学院 | A kind of armored concrete quakeproof stair with damping system |
| CN207597754U (en) * | 2017-10-31 | 2018-07-10 | 江苏金贸科技发展有限公司 | A kind of assembled stair attachment device |
| CN208633405U (en) * | 2018-05-18 | 2019-03-22 | 张�浩 | Novel shock insulation stair |
| CN209585463U (en) * | 2018-07-23 | 2019-11-05 | 李藏柱 | A kind of connection structure of precast stair |
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| CN111424900B (en) | 2021-11-12 |
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