CN210918341U - Assembled building temporary stair - Google Patents
Assembled building temporary stair Download PDFInfo
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- CN210918341U CN210918341U CN201921706738.4U CN201921706738U CN210918341U CN 210918341 U CN210918341 U CN 210918341U CN 201921706738 U CN201921706738 U CN 201921706738U CN 210918341 U CN210918341 U CN 210918341U
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Abstract
An assembled building temporary stair comprises a bottom support, a stair frame, a stair and a platform; a first adjustable base is arranged at the bottom of the bottom support; the stair frame is detachably connected to the bottom support; the stairs comprise a lower stair unit and an upper stair unit; the platform is detachably connected to the rear of the stair frame, and the top of the platform is flush with the lower end of the upper stair unit; the platform comprises a platform support, a platform frame and a platform plate; two platform supports are arranged and correspond to the bottom supports; a second adjustable base is arranged at the bottom of the platform support; the platform frame is rectangular and arranged at the top of the platform support, and the front side edge of the platform frame is detachably connected with the stair frame; the platform plate is laid on the platform frame. The utility model provides a traditional method set up temporary stair at the job site and have the technical problem that lease expense is higher, the efficiency of construction is low and unable secondary turnover is used.
Description
Technical Field
The utility model relates to an assembly type building engineering technical field, especially an assembly type structure temporary stair.
Background
Along with the continuous progress of construction technology, prefabricated buildings are popularized and applied more and more widely, and a structural system which is formed by adopting a cast-in-place integral mode as a main structure, adopting prefabricated components for stairs and being installed within a certain time after the floor structure is poured in a later period is arranged in the existing prefabricated buildings. Because the prefabricated staircase can be installed only when the strength of the prefabricated staircase reaches 75% of the required design requirement after the prefabricated staircase is poured on the floor, the problem that constructors safely enter a construction operation floor before the prefabricated staircase is installed is solved. At present, a temporary stair well formed by all-steel pipe buckle connecting pieces is usually erected between external scaffolds or at other parts of the external scaffolds at a construction site, steps are formed by double round steel pipes and are connected with the well, the erected angle and height can be adjusted according to actual requirements, more temporary stairs are erected by the method, but the problems of higher lease expense, low construction efficiency, incapability of secondary turnover and the like exist; therefore, it is urgently needed to design an ascending stair which can adapt to different sizes of staircases. The design of the staircase not only fully considers the principle of smooth and firm passage of personnel, but also meets the requirements of energy conservation, emission reduction and repeated turnover.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an assembled building temporary stair, it has the technical problem that lease expense is higher, the efficiency of construction is low and unable secondary turnover is used to solve traditional method and set up temporary stair at the job site.
In order to achieve the above purpose, the utility model adopts the following technical scheme.
An assembled building temporary stair comprises a bottom support, a stair frame, a stair and a platform; the two bottom supports are arranged in parallel at intervals along the transverse direction; a first adjustable base is arranged at the bottom of the bottom support; the stair frame is detachably connected to the bottom support and comprises a horizontal frame, a left vertical frame, a middle vertical frame, a right vertical frame and a connecting short rod; the horizontal frame is rectangular and is formed by enclosing four horizontal rods together, and connecting sleeves are respectively arranged at the bottoms of two corners at the rear side of the horizontal frame; the connecting sleeve is correspondingly sleeved on the bottom support; longitudinal lap ends for being lapped on the rest platform in the middle of the floor are respectively arranged at two corners on the front side of the horizontal frame; the left vertical frame is door-shaped and is correspondingly arranged on the longitudinal edge on the left side of the horizontal frame; the right vertical frame is door-shaped and is correspondingly arranged on the longitudinal edge on the right side of the horizontal frame; the middle vertical frame is in a door shape and is correspondingly connected to the horizontal frame between the right vertical frame and the left vertical frame; the connecting short rods are correspondingly connected between the rear side of the left vertical frame and the top of the rear side of the middle vertical frame, between the rear side of the middle vertical frame and the top of the rear side of the right vertical frame, and between the front side of the middle vertical frame and the top of the front side of the right vertical frame; the stairs comprise a lower stair unit and an upper stair unit; the lower stair unit is connected between the middle vertical frame and the right vertical frame; the lower end of the lower stair unit is connected to the bottom of the front side of the stair frame; the upper end of the lower stair unit is connected with the lower part of the rear side of the stair frame; the upper stair unit is connected between the middle vertical frame and the left vertical frame; the lower end of the upper stair unit is connected to the lower part of the rear side of the stair frame and is flush with the upper end of the lower stair unit; the lower end of the upper stair unit is connected with the upper part of the front side of the stair frame;
the platform is detachably connected to the rear of the stair frame, and the top of the platform is flush with the lower end of the upper stair unit; the platform comprises a platform support, a platform frame and a platform plate; the two platform supports are arranged corresponding to the bottom support; a second adjustable base is arranged at the bottom of the platform support; the platform frame is rectangular and arranged at the top of the platform support, and the front side edge of the platform frame is detachably connected with the stair frame; the platform plate is laid on the platform frame.
Preferably, the first adjustable base comprises a first bottom plate, a first screw and a first adjusting plate; the first screw is fixedly connected to the middle of the top of the first bottom plate; the first adjusting plate is horizontally connected to the lower end of the bottom support; a first connecting hole is formed in the middle of the first adjusting plate at a position corresponding to the bottom support; threads are arranged on the side wall of the first connecting hole; the first screw rod is inserted in the first connecting hole and is in threaded connection with the first adjusting plate.
Preferably, the second adjustable base comprises a second bottom plate, a second screw and a second adjusting plate; the second screw is fixedly connected to the middle of the top of the second bottom plate; the second adjusting plate is horizontally connected to the lower end of the platform support; a second connecting hole is formed in the middle of the second adjusting plate and corresponds to the position of the platform support; threads are arranged on the side wall of the second connecting hole; and the second screw rod is inserted in the second connecting hole and is in threaded connection with the second adjusting plate.
Preferably, the left vertical frame comprises a left vertical rod and a left vertical rod; the two left upright posts are correspondingly connected to the tops of the two corners on the left side of the horizontal frame; the left vertical rod is connected between the tops of the two left vertical rods; the right vertical frame comprises a right vertical rod and a right vertical rod; the two right vertical rods are correspondingly connected to the tops of the two corners on the right side of the horizontal frame; the right vertical rod is connected between the tops of the two right vertical rods; the middle vertical frame comprises a middle upright rod and a middle longitudinal rod; the two middle vertical rods are correspondingly connected to the middle parts of the two transverse edges of the horizontal frame; the middle vertical rod is connected between the tops of the two middle vertical rods.
Preferably, the lower stair unit comprises a lower stair beam and a lower stair tread; the number of the lower stair girders is two, wherein one lower stair girder is connected between the two middle vertical rods, and the other lower stair girder is connected between the two right vertical rods; the lower stair steps are in one group and are connected between the two lower stair beams at intervals in parallel; and lower handrails are respectively arranged above the two lower stair girders.
Preferably, the upper stair unit comprises an upper stair beam and an upper stair step; the number of the upper stair girders is two, wherein one upper stair girder is connected between the two middle vertical rods, and the other upper stair girder is connected between the two left vertical rods; the upper stair steps are in one group and are connected between the two upper stair beams at intervals in parallel; upper handrails are respectively arranged above the two upper stair girders.
Preferably, the top of the platform frame is provided with a platform rail along two longitudinal edges and a rear transverse edge of the platform frame.
Compared with the prior art, the utility model has the following characteristics and beneficial effect.
1. The stair frame and the bottom support in the utility model can be detachably connected, and the platform and the stair frame can be detachably connected; the utility model discloses the back that finishes using can dismantle into single less component, and the transportation of being convenient for is used with having enough to meet the need, has solved the technical problem that traditional efficiency of construction who sets up interim stair existence in the job site is low and unable secondary has enough to meet the need the use.
2. The utility model discloses the base of well stair frame bottom and platform bottom adopts vertical adjustable base for whole assembly type structure temporary stair's height-adjustable can satisfy the requirement of co-altitude, and application range is wide.
3. The utility model provides a stair frame, support and platform can be prefabricated before the construction, then transport the job site concatenation, have realized standardized production, have improved preparation and installation effectiveness.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1 is the overall structure schematic diagram of the prefabricated building temporary staircase of the utility model.
Fig. 2 is a schematic structural view of the middle stair frame of the present invention.
Fig. 3 is a schematic structural diagram of the middle platform of the present invention.
Fig. 4 is a schematic structural diagram of the first adjustable base of the present invention.
Fig. 5 is a schematic structural diagram of a second adjustable base according to the present invention.
Reference numerals: 1-bottom support, 2-first adjustable base, 2.1-first bottom plate, 2.2-first screw, 2.3-first adjusting plate, 3-horizontal frame, 3.1-horizontal rod, 4-left vertical frame, 4.1-left vertical rod, 4.2-left vertical rod, 5-middle vertical frame, 5.1-middle vertical rod, 5.2-middle vertical rod, 6-right vertical frame, 6.1-right vertical rod, 6.2-right vertical rod, 7-connecting short rod, 8-connecting sleeve, 9-lap end, 10-lower stair unit, 10.1-lower stair beam, 10.2-lower stair step, 11-upper stair unit, 11.1-upper stair beam, 11.2-upper stair step, 12-platform support, 13-platform frame, 14-platform plate, 15-second adjustable base, 15.1-second bottom plate, 15.2-second screw, 15.3-second adjusting plate, 16.1-first connecting hole, 17-second connecting hole, 15.2-second connecting hole, 18-lower rail, 19-upper rail, 20-platform rail.
Detailed Description
In this embodiment, because of rest platform in the middle of the assembled building temporary stair one side is the floor, there is the difference in height bottom and the rest platform in the middle of the floor of assembled building temporary stair, and the elevation low point sets up overlap joint end and adjustable bottom sprag and guarantees that the stair bottom is steady.
As shown in fig. 1-5, the prefabricated building temporary staircase is temporarily arranged in a staircase and comprises a bottom support 1, a staircase frame, a staircase and a platform; the two bottom supports 1 are arranged in parallel at intervals along the transverse direction; a first adjustable base 2 is arranged at the bottom of the bottom support 1; the stair frame is detachably connected to the bottom support 1 and comprises a horizontal frame 3, a left vertical frame 4, a middle vertical frame 5, a right vertical frame 6 and a connecting short rod 7; the horizontal frame 3 is rectangular and is formed by enclosing four horizontal rods 3.1 together, and connecting sleeves 8 are respectively arranged at the bottoms of two corners at the rear side of the horizontal frame 3; the connecting sleeve 8 is correspondingly sleeved on the bottom support 1; two corners at the front side of the horizontal frame 3 are respectively provided with a longitudinal lapping end 9 which is used for lapping on a rest platform in the middle of a floor; the left vertical frame 4 is door-shaped and is correspondingly arranged on the longitudinal edge on the left side of the horizontal frame 3; the right vertical frame 6 is door-shaped and is correspondingly arranged on the longitudinal edge on the right side of the horizontal frame 3; the middle vertical frame 5 is door-shaped and is correspondingly connected to the horizontal frame 3 between the right vertical frame 6 and the left vertical frame 4; the connecting short rods 7 are correspondingly connected between the rear side of the left vertical frame 4 and the top of the rear side of the middle vertical frame 5, between the rear side of the middle vertical frame 5 and the top of the rear side of the right vertical frame 6 and between the front side of the middle vertical frame 5 and the top of the front side of the right vertical frame 6; the stairs comprise a lower stair unit 10 and an upper stair unit 11; the lower stair unit 10 is connected between the middle vertical frame 5 and the right vertical frame 6; the lower end of the lower stair unit 10 is connected to the bottom of the front side of the stair frame; the upper end of the lower stair unit 10 is connected to the lower part of the rear side of the stair frame; the upper stair unit 11 is connected between the middle vertical frame 5 and the left vertical frame 4; the lower end of the upper stair unit 11 is connected to the lower part of the rear side of the stair frame and is flush with the upper end of the lower stair unit 10; the lower end of the upper stair unit 11 is connected with the upper part of the front side of the stair frame;
the platform is detachably connected to the rear of the stair frame, and the top of the platform is flush with the lower end of the upper stair unit 11; the platform comprises a platform support 12, a platform frame 13 and a platform plate 14; two platform supports 12 are arranged corresponding to the bottom support 1; a second adjustable base 15 is arranged at the bottom of the platform support 12; the platform frame 13 is rectangular and is arranged at the top of the platform support 12, and the front side edge of the platform frame 13 is detachably connected with the stair frame; the platform plate 14 is laid on the platform frame 13.
In this embodiment, each rod in the stair frame is connected by welding.
In this embodiment, the first adjustable base 2 includes a first bottom plate 2.1, a first screw 2.2 and a first adjusting plate 2.3; the first screw 2.2 is fixedly connected to the middle of the top of the first bottom plate 2.1; the first adjusting plate 2.3 is horizontally connected to the lower end of the bottom support 1; a first connecting hole 16 is formed in the middle of the first adjusting plate 2.3 at a position corresponding to the bottom support 1; a screw thread is provided on a side wall of the first connection hole 16; the first screw rod 2.2 is inserted into the first connecting hole 16 and is in threaded connection with the first adjusting plate 2.3.
In this embodiment, the second adjustable base 15 includes a second bottom plate 15.1, a second screw 15.2 and a second adjusting plate 15.3; the second screw 15.2 is fixedly connected to the middle of the top of the second bottom plate 15.1; the second adjusting plate 15.3 is horizontally connected to the lower end of the platform support 12; a second connecting hole 17 is formed in the middle of the second adjusting plate 15.3 at a position corresponding to the platform support 12; threads are arranged on the side wall of the second connecting hole 17; the second screw 15.2 is inserted into the second connecting hole 17 and is in threaded connection with the second adjusting plate 15.3.
In this embodiment, the base support 1 and the platform support 12 are both tubular.
In this embodiment, the left vertical frame 4 includes a left vertical rod 4.1 and a left vertical rod 4.2; two left upright posts 4.1 are correspondingly connected to the tops of two corners on the left side of the horizontal frame 3; the left vertical rod 4.2 is connected between the tops of the two left vertical rods 4.1; the right vertical frame 6 comprises a right vertical rod 6.1 and a right vertical rod 6.2; two right upright posts 6.1 are correspondingly connected to the tops of two corners on the right side of the horizontal frame 3; the right vertical rod 6.2 is connected between the tops of the two right vertical rods 6.1; the middle vertical frame 5 comprises a middle upright rod 5.1 and a middle longitudinal rod 5.2; two middle upright posts 5.1 are correspondingly connected to the middle parts of two transverse edges of the horizontal frame 3; the middle vertical rod 5.2 is connected between the tops of the two middle vertical rods 5.1.
In this embodiment, the lower stair unit 10 includes a lower stair beam 10.1 and a lower stair tread 10.2; two lower stair girders 10.1 are provided, wherein one lower stair girder 10.1 is connected between two middle vertical rods 5.1, and the other lower stair girder 10.1 is connected between two right vertical rods 6.1; the lower stair steps 10.2 are in one group and are connected between the two lower stair beams 10.1 in parallel at intervals; a lower railing 18 is arranged above each of the two lower stair girders 10.1.
In this embodiment, the lower stair steps 10.2 are welded to the lower stair girders 10.1 on both sides thereof.
In this embodiment, the upper stair unit 11 includes an upper stair beam 11.1 and an upper stair tread 11.2; two upper stair girders 11.1 are provided, wherein one upper stair girder 11.1 is connected between two middle vertical rods 5.1, and the other upper stair girder 11.1 is connected between two left vertical rods 4.1; the upper stair steps 11.2 are in one group and are connected between the two upper stair beams 11.1 at intervals in parallel; upper handrails 19 are respectively arranged above the two upper stair girders 11.1.
In this embodiment, the upper stair steps 11.2 are welded to the upper stair girders 11.1 on both sides thereof.
In this embodiment, the upper rail 19 and the lower rail 18 are respectively welded to the stair frame.
In this embodiment, the platform rail 20 is arranged on the top of the platform frame 13 and is surrounded along two longitudinal edges and a rear lateral edge of the platform frame 13.
In this embodiment, the prefabricated building temporary staircase is assembled by adopting an all-steel structure; the stair frame is combined with the composition of the structure of the staircase room of the building engineering and the stress form of the key connecting part, and the stair frame of the temporary stair is determined to be the frame form of the utility model by analyzing the structural stress of the finished staircase room, and all parts in the stair frame are welded; the construction sequence is that the lower stair beam 10.1 and the upper stair beam 11.1, the lower stair step 10.2 and the upper stair step 11.2, the stair protection and other components are arranged on the foundation of the completed stair frame, and the components are arranged on the installation platform.
In this embodiment, the size of the prefabricated building temporary staircase considers the surrounding environment and the necessary operating space, the size of the staircase frame and the size of the platform are determined by subtracting the size of the reinforcement system of the reserved main structure template from the size of the staircase, all projects adopting prefabricated staircase construction, in order to meet the most basic size of the staircase, the minimum length of the staircase frame is 3310mm, the minimum width of the staircase frame is 2540mm, the width of the platform is 1250mm, and the length of the platform is adapted to the length of the staircase frame.
The above embodiments are not exhaustive of the specific embodiments, and other embodiments are possible, and the above embodiments are intended to illustrate, but not limit the scope of the present invention, and all applications coming from the simple changes of the present invention fall within the scope of the present invention.
Claims (7)
1. The utility model provides a prefabricated building temporary stair which characterized in that: comprises a bottom support (1), a stair frame, a stair and a platform; the two bottom supports (1) are arranged in parallel at intervals along the transverse direction; a first adjustable base (2) is arranged at the bottom of the bottom support (1); the stair frame is detachably connected to the bottom support (1) and comprises a horizontal frame (3), a left vertical frame (4), a middle vertical frame (5), a right vertical frame (6) and a connecting short rod (7); the horizontal frame (3) is rectangular and is formed by enclosing four horizontal rods (3.1) together, and connecting sleeves (8) are respectively arranged at the bottoms of two corners at the rear side of the horizontal frame (3); the connecting sleeve (8) is correspondingly sleeved on the bottom support (1); two corners at the front side of the horizontal frame (3) are respectively provided with a longitudinal lapping end (9) which is used for lapping on a rest platform in the middle of a floor; the left vertical frame (4) is door-shaped and is correspondingly arranged on the longitudinal edge on the left side of the horizontal frame (3); the right vertical frame (6) is door-shaped and is correspondingly arranged on the longitudinal edge on the right side of the horizontal frame (3); the middle vertical frame (5) is door-shaped and is correspondingly connected to the horizontal frame (3) between the right vertical frame (6) and the left vertical frame (4); the connecting short rods (7) are correspondingly connected between the rear side of the left vertical frame (4) and the top of the rear side of the middle vertical frame (5), between the rear side of the middle vertical frame (5) and the top of the rear side of the right vertical frame (6), and between the front side of the middle vertical frame (5) and the top of the front side of the right vertical frame (6); the stair comprises a lower stair unit (10) and an upper stair unit (11); the lower stair unit (10) is connected between the middle vertical frame (5) and the right vertical frame (6); the lower end of the lower stair unit (10) is connected to the bottom of the front side of the stair frame; the upper end of the lower stair unit (10) is connected to the lower part of the rear side of the stair frame; the upper stair unit (11) is connected between the middle vertical frame (5) and the left vertical frame (4); the lower end of the upper stair unit (11) is connected to the lower part of the rear side of the stair frame and is flush with the upper end of the lower stair unit (10); the lower end of the upper stair unit (11) is connected with the upper part of the front side of the stair frame;
the platform is detachably connected to the rear of the stair frame, and the top of the platform is flush with the lower end of the upper stair unit (11); the platform comprises a platform support (12), a platform frame (13) and a platform plate (14); the two platform supports (12) are arranged corresponding to the bottom support (1); a second adjustable base (15) is arranged at the bottom of the platform support (12); the platform frame (13) is rectangular and is arranged at the top of the platform support (12), and the front side edge of the platform frame (13) is detachably connected with the stair frame; the platform plate (14) is laid on the platform frame (13).
2. The fabricated building temporary staircase of claim 1, wherein: the first adjustable base (2) comprises a first bottom plate (2.1), a first screw rod (2.2) and a first adjusting plate (2.3); the first screw (2.2) is fixedly connected to the middle of the top of the first bottom plate (2.1); the first adjusting plate (2.3) is horizontally connected to the lower end of the bottom support (1); a first connecting hole (16) is formed in the middle of the first adjusting plate (2.3) at a position corresponding to the bottom support (1); a thread is arranged on the side wall of the first connecting hole (16); the first screw (2.2) is inserted in the first connecting hole (16) and is in threaded connection with the first adjusting plate (2.3).
3. The fabricated building temporary staircase of claim 1, wherein: the second adjustable base (15) comprises a second bottom plate (15.1), a second screw rod (15.2) and a second adjusting plate (15.3); the second screw (15.2) is fixedly connected to the middle of the top of the second bottom plate (15.1); the second adjusting plate (15.3) is horizontally connected to the lower end of the platform support (12); a second connecting hole (17) is formed in the middle of the second adjusting plate (15.3) at a position corresponding to the platform support (12); threads are arranged on the side wall of the second connecting hole (17); the second screw (15.2) is inserted into the second connecting hole (17) and is in threaded connection with the second adjusting plate (15.3).
4. The fabricated building temporary staircase of claim 1, wherein: the left vertical frame (4) comprises a left vertical rod (4.1) and a left vertical rod (4.2); two left upright posts (4.1) are correspondingly connected to the tops of two corners on the left side of the horizontal frame (3); the left vertical rod (4.2) is connected between the tops of the two left vertical rods (4.1); the right vertical frame (6) comprises a right vertical rod (6.1) and a right longitudinal rod (6.2); two right upright posts (6.1) are correspondingly connected to the tops of two corners on the right side of the horizontal frame (3); the right vertical rod (6.2) is connected between the tops of the two right vertical rods (6.1); the middle vertical frame (5) comprises a middle upright rod (5.1) and a middle longitudinal rod (5.2); two middle upright posts (5.1) are correspondingly connected to the middle parts of two transverse edges of the horizontal frame (3); the middle vertical rod (5.2) is connected between the tops of the two middle vertical rods (5.1).
5. The fabricated building temporary staircase of claim 4, wherein: the lower stair unit (10) comprises a lower stair beam (10.1) and a lower stair step (10.2); two lower stair girders (10.1) are provided, wherein one lower stair girder (10.1) is connected between two middle vertical rods (5.1), and the other lower stair girder (10.1) is connected between two right vertical rods (6.1); the lower stair steps (10.2) are in one group and are connected between the two lower stair beams (10.1) at intervals in parallel; lower railings (18) are respectively arranged above the two lower stair beams (10.1).
6. The fabricated building temporary staircase of claim 4, wherein: the upper stair unit (11) comprises an upper stair beam (11.1) and an upper stair step (11.2); two upper stair girders (11.1) are arranged, wherein one upper stair girder (11.1) is connected between two middle vertical rods (5.1), and the other upper stair girder (11.1) is connected between two left vertical rods (4.1); the upper stair steps (11.2) are in one group and are connected between the two upper stair beams (11.1) at intervals in parallel; upper railings (19) are respectively arranged above the two upper stair beams (11.1).
7. The fabricated building temporary staircase of claim 4, wherein: and a platform railing (20) is arranged on the top of the platform frame (13) along two longitudinal edges and a rear transverse edge of the platform frame (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921706738.4U CN210918341U (en) | 2019-10-12 | 2019-10-12 | Assembled building temporary stair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921706738.4U CN210918341U (en) | 2019-10-12 | 2019-10-12 | Assembled building temporary stair |
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| Publication Number | Publication Date |
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| CN210918341U true CN210918341U (en) | 2020-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921706738.4U Active CN210918341U (en) | 2019-10-12 | 2019-10-12 | Assembled building temporary stair |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113463898A (en) * | 2021-08-17 | 2021-10-01 | 宁波市建设集团股份有限公司 | Tool type operation platform for PC (personal computer) stairwell |
| CN114991531A (en) * | 2022-05-30 | 2022-09-02 | 江苏省华建建设股份有限公司 | Temporary stair for prefabricated concrete structure and construction method thereof |
-
2019
- 2019-10-12 CN CN201921706738.4U patent/CN210918341U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113463898A (en) * | 2021-08-17 | 2021-10-01 | 宁波市建设集团股份有限公司 | Tool type operation platform for PC (personal computer) stairwell |
| CN114991531A (en) * | 2022-05-30 | 2022-09-02 | 江苏省华建建设股份有限公司 | Temporary stair for prefabricated concrete structure and construction method thereof |
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