CN113266116A - Prefabricated stair structure and manufacturing and mounting method thereof - Google Patents
Prefabricated stair structure and manufacturing and mounting method thereof Download PDFInfo
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- CN113266116A CN113266116A CN202110544869.2A CN202110544869A CN113266116A CN 113266116 A CN113266116 A CN 113266116A CN 202110544869 A CN202110544869 A CN 202110544869A CN 113266116 A CN113266116 A CN 113266116A
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 101
- 239000010959 steel Substances 0.000 claims abstract description 101
- 238000003466 welding Methods 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 14
- 238000005452 bending Methods 0.000 claims description 26
- 230000003014 reinforcing effect Effects 0.000 claims description 17
- 238000005266 casting Methods 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 9
- 239000004568 cement Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 description 6
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/22—Moulds for making units for prefabricated buildings, i.e. units each comprising an important section of at least two limiting planes of a room or space, e.g. cells; Moulds for making prefabricated stair units
- B28B7/225—Moulds for making units for prefabricated buildings, i.e. units each comprising an important section of at least two limiting planes of a room or space, e.g. cells; Moulds for making prefabricated stair units for making stairs or stair units comprising more than one step
-
- 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)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Steps, Ramps, And Handrails (AREA)
Abstract
The invention discloses a prefabricated staircase structure and a manufacturing and installing method thereof, which comprises a staircase main body, wherein the staircase main body comprises a top platform, steps and a bottom platform, and a structural frame is sleeved in the staircase main body, the invention provides a processing and installing method of the prefabricated staircase structure, a main beam steel bar and a secondary beam steel bar are utilized to actively connect a main support structure of a frame, materials can be saved to the maximum extent while the strength of the whole staircase plate structure is ensured, the existing latticed welding structure is saved, the processing time is reduced, the processing data of various materials can be directly obtained by utilizing common parameters for calculation, the processing efficiency is further improved, the production line type production is favorably realized, the problems that the welding process is time-consuming and troublesome and the materials are wasted when the existing prefabricated staircase structure is produced are effectively solved, meanwhile, the problem that the production line operation is not facilitated in the production process of the conventional stair structure is solved.
Description
Technical Field
The invention relates to the field of assembly type buildings, in particular to a prefabricated stair structure and a manufacturing and installing method thereof.
Background
The fabricated building means that a large amount of field work in the conventional construction method is transferred to a factory, the components and accessories (such as floor slabs, wall plates, stairs, balconies and the like) for the building are processed and manufactured in a factory, are transported to a building construction site, the main reinforcing steel bar frames are welded and formed by adopting a latticed welding method when the existing prefabricated stair structure is produced by a building assembled and installed on site in a reliable connection mode, and the reinforcing steel bar structure of the stair part is inconvenient to position, which can cause uneven distribution of the reinforcing steel bars in each step, so the welding process is time-consuming and troublesome, and wastes materials, and the existing stair has a complex structure, so the production process is not beneficial to the automatic welding of large-scale equipment, therefore, the operation of the production line is affected, and in view of the above problems, a prefabricated staircase structure and a manufacturing and installation method thereof are particularly provided.
Disclosure of Invention
The present invention is directed to a prefabricated staircase structure and a method for manufacturing and installing the same, so as to solve the problems of the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a prefabricated formula stair structure, includes the stair main part, the stair main part includes top platform, step and end platform, the structure frame has been cup jointed to the inside of stair main part, the structure frame includes the girder reinforcing bar, the side surface welding of girder reinforcing bar has the link of wave type, the inboard welding in bottom of link has the auxiliary girder reinforcing bar, the even welding in lower surface of auxiliary girder reinforcing bar has first connecting strip, the last skin weld of girder reinforcing bar has the second connecting strip, the below welding of second connecting strip has the step reinforcing bar that parallels with the step surface.
Preferably, pouring holes are formed in the upper surfaces of the top platform and the bottom platform.
Preferably, the inner surface of the pouring hole is sleeved with an auxiliary pouring piece, and the outer side end of the auxiliary pouring piece is welded on the side surfaces of the first connecting strip and the second connecting strip.
A manufacturing and installing method of a prefabricated staircase structure comprises the following steps:
the method comprises the following steps: firstly, the pouring mould is cleaned, and impurities which can affect the surface quality of the stair structure, such as oil stains, residual cement, sand, dust and the like, are removed.
Step two: and after the inner wall of the casting mold is cleaned and dried, uniformly spraying a release agent on the inner wall of the casting mold again.
Step three: welding the structural frame, determining the structural size of the stair to be formed, and obtaining the following structural size: the lower surface of the top platform has a longitudinal edge of c and a length of la；
The bevel edge of the lower surface of the step is b and the length is lb；
The length of the lower surface longitudinal edge of the bottom platform is lc；
An included angle between the bevel edge b of the lower surface of the step and the longitudinal edge a of the lower surface of the bottom platform is alpha;
the top platform and the bottom platform have a thickness of h and a length of lhAnd the vertical thickness of the outer casting surface of the concrete and the nearest steel bar is a constant k;
the left end of the main beam steel bar is bent to the length l of the leftmost end4
length l from left end to left end at left end bending position of auxiliary beam steel bar3
the length l of the right end bending distance of the main beam steel bar to the rightmost end2
length l from left end to left end at left end bending position of auxiliary beam steel bar1
the bending length of the step steel bar is equal to the side length of the outer surface of the step;
and the total length of the main beam steel bars is lb+l2+l4The total length of the secondary beam steel bar is lb+l1+l3. Step IV: after the lengths and the processing information of the main beam steel bars and the auxiliary beam steel bars are obtained, intercepting materials are processed into a proper shape, firstly, the top end of the connecting frame is welded on the two sides of the main beam steel bars, the bottom end of the connecting frame is welded on the two sides of the auxiliary beam steel bars, first connecting bars are welded below the auxiliary beam steel bars according to proper intervals respectively, then step steel bars with the same side length and bending angle as the upper surface of a step are processed, the left end and the right end are respectively intercepted for k length distances, second connecting bars are welded above the bottom ends of the step steel bars, finally, the left ends and the right ends of the step steel bars are aligned with the left ends and the right ends of the main beam steel bars and the auxiliary beam steel bars, the second connecting bars are welded on the corresponding contact positions above the main beam steel bars, and finally auxiliary pouring pieces are welded on the opening size positions.
Step five: and after the structural frame is welded, positioning the structural frame in a mold, and pouring.
Step (c): and (4) demolding and transporting the cast product to an installation site after pouring, hoisting the top platform and the bottom platform to a reserved position and aligning the top platform and the bottom platform with the hole site, pouring concrete into the pouring hole, and completing installation.
Preferably, the welding point positions of the connecting frame and the main beam steel bars and the auxiliary beam steel bars are tangent to the outer circles of the sections of the main beam steel bars and the auxiliary beam steel bars respectively.
Preferably, the diameter of the main beam steel bar is 1.8-2.2 times of that of the auxiliary beam steel bar.
Preferably, the transverse structure and the longitudinal structure of the step steel bar are respectively parallel to the transverse surface and the longitudinal surface of the outer surface of the step.
Preferably, the connecting line of the central axes of the main beam steel bars and the auxiliary beam steel bars is parallel to the bottom surface of the step.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a processing and mounting method of a prefabricated staircase structure, which utilizes main beam steel bars and auxiliary beam steel bars to actively connect a main support structure of a frame, ensures the strength of the whole staircase plate structure, can save materials to the greatest extent, saves the existing latticed welding structure, reduces the processing time, can directly obtain the processing data of various materials by utilizing common parameters for calculation, further improves the processing efficiency, is beneficial to realizing production line type production, effectively solves the problems of time consumption, trouble in the welding process and material waste of the existing prefabricated staircase structure during production, and simultaneously solves the problem that the production process of the existing staircase structure is not beneficial to production line operation.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cutaway schematic view of the present invention;
FIG. 3 is a schematic view of a welded structure of the structural frame of the present invention;
fig. 4 is a right side view of the left half section of fig. 2.
In the figure: 1. stair main part, 11, top platform, 12, step, 13, end platform, 14, pour the hole, 2, structural framework, 21, girder reinforcing bar, 22, auxiliary girder reinforcing bar, 23, link, 24, first connecting strip, 25, second connecting strip, 26, step reinforcing bar, 27, supplementary casting.
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.
Referring to fig. 1-4, the present invention provides a technical solution: a prefabricated stair structure comprises a stair main body 1, wherein the stair main body 1 comprises a top platform 11, steps 12 and a bottom platform 13, a structural frame 2 is sleeved inside the stair main body 1, the structural frame 2 comprises main beam steel bars 21, wave-shaped connecting frames 23 are welded on the side surfaces of the main beam steel bars 21, auxiliary beam steel bars 22 are welded on the inner sides of the bottom ends of the connecting frames 23, first connecting bars 24 are uniformly welded on the lower surfaces of the auxiliary beam steel bars 22, second connecting bars 25 are welded on the upper surfaces of the main beam steel bars 21, and step steel bars 26 parallel to the outer surfaces of the steps 12 are welded below the second connecting bars 25;
the invention provides a method for processing and installing a prefabricated staircase structure, which utilizes main beam steel bars 21 and auxiliary beam steel bars 22 to actively connect a main supporting structure of a frame 23, ensures the strength of the whole staircase plate structure, can save materials to the greatest extent, saves the existing latticed welding structure, reduces the processing time, can directly obtain the processing data of various materials by utilizing common parameters for calculation, further improves the processing efficiency, is beneficial to realizing production line type production, effectively solves the problems of time consumption, trouble and material waste in the welding process during the production of the existing prefabricated staircase structure, and simultaneously solves the problem that the production process of the existing staircase structure is not beneficial to the production line operation.
Particularly, top platform 11 and bottom platform 13's upper surface has been seted up and has been pour hole 14, and the screw rod that pours the hole and the mounted position reservation when the installation realizes cup jointing and pour, and then can fix a position stair structure to in the inside of step 12, step reinforcing bar 26's side surface welding has prefabricated steel reinforcement cage promptly, and then guarantees that the inside of step 12 has the steel bar structure of even and enough support step 12 intensity.
Specifically, the auxiliary pouring piece 27 is sleeved on the inner surface of the pouring hole 14, the outer side end of the auxiliary pouring piece 27 is welded to the side surfaces of the first connecting strip 24 and the second connecting strip 25, and the auxiliary pouring piece 27 which is exposed inside the pouring hole 14 and is welded and fixed with the whole structure frame 2 is utilized, so that the positioning effect of the stair structure and the installation position can be effectively improved when the pouring is fixed.
A manufacturing and installing method of a prefabricated staircase structure comprises the following steps:
the method comprises the following steps: firstly, the pouring mould is cleaned, and impurities which can affect the surface quality of the stair structure, such as oil stains, residual cement, sand, dust and the like, are removed.
Step two: and after the inner wall of the casting mold is cleaned and dried, uniformly spraying a release agent on the inner wall of the casting mold again.
Step three: and (3) welding the structural frame 2, determining the structural size of the stair to be formed, and obtaining the following structural size:
the lower surface of the top platform 11 has a longitudinal edge of c and a length of la；
The lower surface of the step 12 has a sloping side b and a length lb；
The lower surface longitudinal edge of the bottom platform 13 is a, and the length is lc；
The included angle between the bevel edge b of the lower surface of the step 12 and the longitudinal edge a of the lower surface of the bottom platform 13 is alpha;
the top platform 11 and the bottom platform 13 have a thickness h and a length lhAnd the vertical thickness of the outer casting surface of the concrete and the nearest steel bar is a constant k;
the left end of the main beam steel bar 21 is bent by the length l from the leftmost end4
the length l of the left end bending position of the auxiliary beam steel bar 22 from the leftmost end3
the right end of the main beam steel bar 21 is bent by the length l from the rightmost end2
the length of the left end bending part of the auxiliary beam steel bar 22 from the leftmost endl1
the bending length of the step steel bar 26 is equal to the side length of the outer surface of the step 12;
and the total length of the main beam steel bar 21 is lb+l2+l4The total length of the auxiliary beam steel bar 22 is lb+l1+l3。
Step IV: after the lengths and the processing information of the main beam steel bars 21 and the auxiliary beam steel bars 22 are obtained, intercepting materials and processing the materials into a proper shape, firstly welding the top ends of the connecting frames 23 at the two sides of the main beam steel bars 21, welding the bottom ends of the connecting frames 23 at the two sides of the auxiliary beam steel bars 22, respectively welding first connecting bars 24 below the auxiliary beam steel bars 22 at proper intervals, then processing step steel bars 26 with the same side length and bending angle as the upper surface of the steps 12, respectively intercepting the left ends and the right ends at k length distances, welding second connecting bars 25 above the bottom ends of the step steel bars 26, finally aligning the left ends and the right ends of the step steel bars 26 with the left ends and the right ends of the main beam steel bars 21 and the auxiliary beam steel bars 22, welding the second connecting bars 25 at corresponding contact positions above the main beam steel bars 21, and finally welding auxiliary pouring pieces 27 at the opening size positions.
Step five: and after the structural frame 2 is welded, positioning the structural frame 2 in a mold and pouring.
Step (c): and (4) after pouring, demolding and transporting to an installation site, hoisting the top platform 11 and the bottom platform 13 to a reserved position and aligning with the hole position, pouring concrete into the pouring hole 14, and completing installation.
Specifically, the welding points of the connecting frame 23 and the main beam steel bars 21 and the auxiliary beam steel bars 22 are respectively tangent to the outer circles of the sections of the main beam steel bars 21 and the auxiliary beam steel bars 22, so that the section of the connecting frame 23 is in a structural shape with a wide top and a narrow bottom when viewed from the section of a vertical connecting line at a certain position of the main beam steel bars 21 and the auxiliary beam steel bars 22, and the stability of the whole main beam structure mainly responsible for providing the supporting strength is improved by using the approximately triangular structure.
Specifically, the diameter of the main beam steel bar 21 is 1.8-2.2 times of the diameter of the auxiliary beam steel bar 22.
Particularly, the horizontal structure of step reinforcing bar 26 and longitudinal structure are parallel with the surface horizontal plane and the vertical plane of step 12 respectively, and assurance that can certain degree pours back stair structure's homogeneity.
Specifically, the central axis connecting line of the main beam steel bar 21 and the auxiliary beam steel bar 22 is parallel to the bottom surface of the step 2.
The auxiliary pouring piece 27 is welded by adopting a plurality of layers of annular steel rings, and the distance between the outer surface of the used welding steel ring and the inner radius of the pouring hole 14 is 0.15-0.2 times of the radius of the pouring hole 14, so that the connection effect of the mounting position is improved on the premise of not influencing the penetration of a reserved screw at the mounting position.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a prefabricated formula stair structure, includes stair main part (1), its characterized in that: stair main part (1) is including top platform (11), step (12) and end platform (13), structure frame (2) have been cup jointed to the inside of stair main part (1), structure frame (2) are including girder reinforcing bar (21), the side surface welding of girder reinforcing bar (21) has link (23) of wave type, the inboard welding in bottom of link (23) has auxiliary girder reinforcing bar (22), the even welding in lower surface of auxiliary girder reinforcing bar (22) has first connecting strip (24), the last skin weld of girder reinforcing bar (21) has second connecting strip (25), the welding of the below of second connecting strip (25) has step reinforcing bar (26) that parallel with step (12) surface.
2. A prefabricated staircase structure as defined in claim 1, wherein: and pouring holes (14) are formed in the upper surfaces of the top platform (11) and the bottom platform (13).
3. A prefabricated staircase structure as defined in claim 2, wherein: and an auxiliary pouring piece (27) is sleeved on the inner surface of the pouring hole (14), and the outer side end of the auxiliary pouring piece (27) is welded on the side surfaces of the first connecting strip (24) and the second connecting strip (25).
4. A method of manufacturing and installing a prefabricated staircase structure according to any of claims 1-3, characterized in that: the manufacturing and mounting method comprises the following steps:
the method comprises the following steps: firstly, the pouring mould is cleaned, and impurities which can affect the surface quality of the stair structure, such as oil stains, residual cement, sand, dust and the like, are removed.
Step two: and after the inner wall of the casting mold is cleaned and dried, uniformly spraying a release agent on the inner wall of the casting mold again.
Step three: welding the structural frame (2), determining the structural size of the stair to be formed, and obtaining the following structural size:
the lower surface of the top platform (11) has a longitudinal edge of c and a length of la；
The bevel edge of the lower surface of the step (12) is b, and the length is lb；
The lower surface longitudinal edge of the bottom platform (13) has a length of lc；
An included angle between the bevel edge b of the lower surface of the step (12) and the longitudinal edge a of the lower surface of the bottom platform (13) is alpha;
the top platform (11) and the bottom platform (13) have a thickness of h and a length of lhAnd the vertical thickness of the outer casting surface of the concrete and the nearest steel bar is a constant k;
the left end of the main beam steel bar (21) is bent to the length l of the leftmost end4 
The bending angle is alpha;
the length l of the left end bending position of the auxiliary beam steel bar (22) from the leftmost end3 
The bending angle is alpha;
the length l of the rightmost end of the bending distance of the right end of the main beam steel bar (21)2 
The bending angle is 360-alpha;
the length l of the left end bending position of the auxiliary beam steel bar (22) from the leftmost end1 
The bending angle is 360-alpha;
the bending length of the step steel bar (26) is equal to the side length of the outer surface of the step (12);
and the total length of the main beam steel bar (21) is lb+l2+l4The total length of the auxiliary beam steel bar (22) is lb+l1+l3。
Step IV: after the lengths and the processing information of the main beam steel bar (21) and the auxiliary beam steel bar (22) are obtained, materials are intercepted and processed into a proper shape, the top end of a connecting frame (23) is welded on the two sides of the main beam steel bar (21), the bottom end of the connecting frame (23) is welded on the two sides of the auxiliary beam steel bar (22), first connecting bars (24) are respectively welded below the auxiliary beam steel bar (22) according to proper intervals, step steel bars (26) with the same side length and bending angle as the upper surface of a step (12) are processed, after the left end and the right end are respectively intercepted for a distance of k length, second connecting bars (25) are welded above the bottom end of the step steel bar (26), finally, the left end and the right end of the step steel bar (26) are aligned with the left end and the right end of the main beam steel bar (21) and the auxiliary beam steel bar (22), the second connecting bars (25) are welded on the corresponding contact positions above the main beam steel bar (21), finally, welding auxiliary pouring pieces (27) at the positions of the opening sizes.
Step five: and after the structural frame (2) is welded, positioning the structural frame (2) in a mold and pouring.
Step (c): and after pouring is finished, demolding and transporting to an installation site, hoisting the top platform (11) and the bottom platform (13) to a reserved position and aligning to a hole position, pouring concrete into the pouring hole (14), and finishing installation.
5. The method of claim 4, wherein the method comprises the steps of: the welding point positions of the connecting frame (23) and the main beam steel bars (21) and the auxiliary beam steel bars (22) are equally divided into sections of the main beam steel bars (21) and the auxiliary beam steel bars (22), and the sections are tangent.
6. The method of claim 4, wherein the method comprises the steps of: the diameter of the main beam steel bar (21) is 1.8-2.2 times of that of the auxiliary beam steel bar (22).
7. The method of claim 4, wherein the method comprises the steps of: the transverse structure and the longitudinal structure of the step steel bar (26) are respectively parallel to the transverse surface and the longitudinal surface of the outer surface of the step (12).
8. The method of claim 4, wherein the method comprises the steps of: and the connecting line of the central axes of the main beam steel bar (21) and the auxiliary beam steel bar (22) is parallel to the bottom surface of the step (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110544869.2A CN113266116A (en) | 2021-05-19 | 2021-05-19 | Prefabricated stair structure and manufacturing and mounting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110544869.2A CN113266116A (en) | 2021-05-19 | 2021-05-19 | Prefabricated stair structure and manufacturing and mounting method thereof |
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| CN113266116A true CN113266116A (en) | 2021-08-17 |
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| CN202110544869.2A Pending CN113266116A (en) | 2021-05-19 | 2021-05-19 | Prefabricated stair structure and manufacturing and mounting method thereof |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04194253A (en) * | 1990-11-28 | 1992-07-14 | Fujita Corp | Pc stairs building method and pc stairs |
| CN204571133U (en) * | 2015-04-22 | 2015-08-19 | 山东同圆设计集团有限公司 | The light prefabricated stair of a kind of steel truss |
| CN209369204U (en) * | 2018-11-24 | 2019-09-10 | 上海福铁龙住宅工业发展有限公司 | A kind of precast stair structure |
| CN209723438U (en) * | 2019-01-30 | 2019-12-03 | 江苏盛世伟业新材料有限公司 | A kind of novel coagulation body precast stair plate |
| CN111305495A (en) * | 2020-03-15 | 2020-06-19 | 湖南城市学院 | Lightweight concrete combined stair |
| CN212001991U (en) * | 2020-04-02 | 2020-11-24 | 青岛杰地建筑设计有限公司 | High-bearing double-holding triangular rib assembly stair |
| CN212271447U (en) * | 2020-01-15 | 2021-01-01 | 广东省建科建筑设计院有限公司 | Light-duty prefabricated stair of marking time and boundary beam common atress |
-
2021
- 2021-05-19 CN CN202110544869.2A patent/CN113266116A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04194253A (en) * | 1990-11-28 | 1992-07-14 | Fujita Corp | Pc stairs building method and pc stairs |
| CN204571133U (en) * | 2015-04-22 | 2015-08-19 | 山东同圆设计集团有限公司 | The light prefabricated stair of a kind of steel truss |
| CN209369204U (en) * | 2018-11-24 | 2019-09-10 | 上海福铁龙住宅工业发展有限公司 | A kind of precast stair structure |
| CN209723438U (en) * | 2019-01-30 | 2019-12-03 | 江苏盛世伟业新材料有限公司 | A kind of novel coagulation body precast stair plate |
| CN212271447U (en) * | 2020-01-15 | 2021-01-01 | 广东省建科建筑设计院有限公司 | Light-duty prefabricated stair of marking time and boundary beam common atress |
| CN111305495A (en) * | 2020-03-15 | 2020-06-19 | 湖南城市学院 | Lightweight concrete combined stair |
| CN212001991U (en) * | 2020-04-02 | 2020-11-24 | 青岛杰地建筑设计有限公司 | High-bearing double-holding triangular rib assembly stair |
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