CN215907016U - Connecting structure of prefabricated superimposed sheet and steel beam - Google Patents
Connecting structure of prefabricated superimposed sheet and steel beam Download PDFInfo
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- CN215907016U CN215907016U CN202121664614.1U CN202121664614U CN215907016U CN 215907016 U CN215907016 U CN 215907016U CN 202121664614 U CN202121664614 U CN 202121664614U CN 215907016 U CN215907016 U CN 215907016U
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Abstract
The utility model provides a connecting structure of a prefabricated laminated slab and a steel beam, relates to the technical field of assembly buildings, and solves the problems that the laminated slab and the steel beam are connected in a troublesome manner and the safety of the connecting structure is not ideal in the prior art. The prefabricated composite slab comprises a prefabricated composite slab and a steel beam; the prefabricated composite slab comprises a prefabricated slab body and a pre-buried connecting piece arranged in the lapping part of the prefabricated slab body, and the lapping part of the prefabricated slab body is lapped on the top surface of the steel beam; the embedded connecting piece is a weldable structural piece, and the bottom surface of the embedded connecting piece is exposed to the bottom surface of the prefabricated plate body and is connected with the top surface of the steel beam; one side surface of the embedded connecting piece connected with the bottom surface of the embedded connecting piece is exposed on the side surface of the lap joint part of the prefabricated plate body and is positioned right above the steel beam. The utility model can weld and connect the prefabricated composite slab and the steel beam on site, simplify the connection operation, reduce the on-site workload and improve the structural safety of the prefabricated composite slab and the steel beam.
Description
Technical Field
The utility model relates to the technical field of assembly buildings, in particular to a connecting structure of a prefabricated composite slab and a steel beam.
Background
With the rapid growth of economy in China, steel structure houses are greatly popularized and developed. The prefabricated concrete composite floor slab is a common floor slab form in a steel structure residential system, and compared with a cast-in-place reinforced concrete floor slab, the prefabricated concrete composite floor slab can save a large number of templates during construction and can be constructed in multiple layers simultaneously, so that the construction speed is accelerated, and the construction period is shortened. At present, the composite slab and the steel beam are not directly connected, but the floor slab and the steel beam are connected through secondary cast-in-place by using studs, more field operations are needed, the construction is not convenient enough, and the connection strength of the floor slab and the steel beam is not ideal enough.
SUMMERY OF THE UTILITY MODEL
The utility model aims to design a connecting structure of a prefabricated composite slab and a steel beam, which can enable the prefabricated composite slab and the steel beam to be welded and connected on site, simplify the connecting operation, reduce the site workload and improve the structural safety of the prefabricated composite slab and the steel beam.
The utility model is realized by the following technical scheme:
a connecting structure of a prefabricated composite slab and a steel beam comprises the prefabricated composite slab and the steel beam;
the prefabricated composite slab comprises a prefabricated slab body and a pre-buried connecting piece arranged in the lapping part of the prefabricated slab body, and the lapping part of the prefabricated slab body is lapped on the top surface of the steel beam; the embedded connecting piece is a weldable structural piece, and the bottom surface of the embedded connecting piece is exposed to the bottom surface of the prefabricated plate body and is connected with the top surface of the steel beam; one side surface of the embedded connecting piece connected with the bottom surface of the embedded connecting piece is exposed on the side surface of the lap joint part of the prefabricated plate body and is positioned right above the steel beam.
When the structure is arranged, the pre-buried connecting piece is a weldable structural piece and is prefabricated in a factory as a part of the prefabricated laminated slab. Its bottom surface of buried connecting piece and a side expose in the bottom surface of prefabricated plate body and the side of overlap joint portion, can be at the back of prefabricated superimposed sheet overlap joint on the girder steel, can weld the area at pre-buried connecting piece and girder steel top surface formation, create welding conditions, can be at the scene through welding with prefabricated superimposed sheet and girder steel lug connection, not only can simplify the joining operation of prefabricated superimposed sheet and girder steel, can improve the structural security of floor and girder steel moreover.
In order to further better implement the utility model, the following arrangement structure is particularly adopted: the prefabricated composite slab also comprises a pre-buried reinforcing mesh and a truss; the embedded steel bar mesh is arranged in the prefabricated slab body, and two ends of a transverse bar and two ends of a longitudinal bar of the embedded steel bar mesh extend out of the prefabricated slab body from the side surface of the prefabricated slab body respectively; the lower part of the truss is arranged in the prefabricated slab body, and the upper part of the truss protrudes out of the top surface of the prefabricated slab body.
In order to further better implement the utility model, the following arrangement structure is particularly adopted: the overlapping part of the prefabricated plate body is provided with a plurality of embedded connecting pieces, and all the embedded connecting pieces are sequentially arranged at intervals along the length direction of the overlapping part of the prefabricated plate body.
In order to further better implement the utility model, the following arrangement structure is particularly adopted: the embedded connecting piece comprises a base, the base is a weldable metal structural piece, and the bottom surface of the base is exposed to the bottom surface of the prefabricated plate body and is connected with the top surface of the steel beam; one side face connected with the bottom face of the base is exposed to the side face of the lap joint part of the prefabricated composite slab and is located right above the steel beam.
In order to further better implement the utility model, the following arrangement structure is particularly adopted: the bottom surface of the base is set to be a horizontal plane; the bottom surface of base with the bottom surface parallel and level of prefabricated plate body.
When the structure is arranged, the bottom surface of the base is arranged to be a horizontal plane and is flush with the bottom surface of the prefabricated plate body, so that the prefabricated laminated slab and the base can be stably placed on the steel beam to create welding conditions.
In order to further better implement the utility model, the following arrangement structure is particularly adopted: the embedded connecting piece also comprises a vertical bar; the stud is wholly set up in base top position, the bottom fixed connection of stud the top of base, the top of stud upwards stretches out prefabricated plate body top surface.
When the structure is arranged, the vertical ribs are located above the base, the embedded connecting pieces can be firmly combined with the prefabricated plate body through the vertical ribs, the vertical ribs upwards penetrate out of the top surface of the prefabricated plate body to serve as the structure of the cast-in-place part of the floor slab, the prefabricated part of the floor slab is firmly combined with the cast-in-place part, and the integrity of the floor slab is improved.
In order to further better implement the utility model, the following arrangement structure is particularly adopted: the prefabricated slab is internally provided with U-shaped anchoring ribs, one pre-buried connecting piece is connected with one U-shaped anchoring rib, and the bending section of the U-shaped anchoring rib wraps the vertical rib of the pre-buried connecting piece.
When the structure is arranged, the U-shaped anchoring ribs are connected with the embedded connecting pieces as reinforcing ribs and used for enhancing the structural strength of the position.
In order to further better implement the utility model, the following arrangement structure is particularly adopted: one the girder steel on the overlap joint have two prefabricated superimposed sheet, two form the post-cast strip between the overlap joint portion of prefabricated superimposed sheet, two corresponding on the prefabricated superimposed sheet connect through the horizontal reinforcement that sets up of level between the founding of pre-buried connecting piece.
When the structure is arranged, the reinforcing part is connected with the two embedded connecting parts on the two prefabricated composite slabs, so that the structural strength of the two prefabricated composite slabs can be improved.
In order to further better implement the utility model, the following arrangement structure is particularly adopted: the reinforcing piece is a straight rib or a lacing wire with a hook arranged at the end part.
In order to further better implement the utility model, the following arrangement structure is particularly adopted: the whole vertical setting of grudging post, the top of grudging post is provided with the elbow, the elbow sets up to the breach orientation the knee of prefabricated plate body top surface.
When the structure is adopted, the arrangement of the elbow can enable the prefabricated part and the cast-in-place part of the floor slab to be better combined, and the integrity of the floor slab is improved.
In order to further better implement the utility model, the following arrangement structure is particularly adopted: the cross sections of the studs and the elbows are circular sections.
In order to further better implement the utility model, the following arrangement structure is particularly adopted: a bevel face is arranged on one side face of the base; the bottom angle of the lap joint part of the prefabricated plate body is provided with a notch angle, the bevel face is exposed at the notch angle of the lap joint part of the prefabricated plate body, and the bevel face faces the oblique lower side and forms a welding groove with the top surface of the steel beam.
When the structure is arranged, the bevel face is exposed at the position of the gap, a welding groove can be formed between the embedded connecting piece and the steel beam, and the joint strength of a welding seam can be improved.
In order to further better implement the utility model, the following arrangement structure is particularly adopted: the bevel face and the elbow are sequentially arranged on the base in the transverse direction, and the bevel face and the elbow are respectively located on two opposite sides of the stud.
The utility model has the following advantages and beneficial effects:
in the utility model, the embedded connecting piece is a weldable structural piece and is prefabricated in a factory as a part of a prefabricated laminated slab. Its bottom surface of buried connecting piece and a side expose in the bottom surface of prefabricated plate body and the side of overlap joint portion, can be at the back of prefabricated superimposed sheet overlap joint on the girder steel, can weld the area at pre-buried connecting piece and girder steel top surface formation, create welding conditions, can be at the scene through welding with prefabricated superimposed sheet and girder steel lug connection, not only can simplify the joining operation of prefabricated superimposed sheet and girder steel, can improve the structural security of floor and girder steel moreover.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view showing a connection structure of prefabricated composite slabs and steel beams (the prefabricated slabs are hidden in the prefabricated composite slab on the left side);
FIG. 2 is an enlarged partial schematic view of A of FIG. 1;
FIG. 3 is a schematic view of a connection structure of the embedded connector and the U-shaped anchoring rib;
FIG. 4 is a schematic structural view of a prefabricated composite slab;
FIG. 5 is a partial front view schematic view of a prefabricated composite slab;
labeled as:
1. prefabricating a laminated slab; 11. prefabricating a plate body; 111. unfilled corners; 12. pre-burying a reinforcing mesh; 13. a truss; 14. pre-burying a connecting piece; 141. a base; 142. erecting ribs; 143. bending the pipe; 144. a bevel face;
2. a steel beam; 3. a reinforcement; 4. u-shaped anchoring ribs.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
Example 1:
a connection structure of a prefabricated composite slab and a steel beam, which can connect the prefabricated composite slab and the steel beam by welding on the spot, simplify the connection operation, reduce the on-site workload, and improve the structural safety of the prefabricated composite slab and the steel beam, as shown in FIG. 1, FIG. 2, FIG. 3, FIG. 4, and FIG. 5, is particularly configured as follows:
the components of the connecting structure of the prefabricated composite slab and the steel beam comprise a rectangular prefabricated composite slab 1 and an I-shaped steel beam 2. The 1 level of prefabricated superimposed sheet sets up, and the one end that prefabricated superimposed sheet 1 transversely went up is overlap joint portion, and the overlap joint portion overlap joint of prefabricated superimposed sheet 1 is in the vertical top surface that sets up of girder steel 2 of level. Prefabricated superimposed sheet 1 includes the prefabricated plate body 11 that the concrete was made, pre-buried reinforcing bar net 12, truss 13 and pre-buried connecting piece 14, pre-buried reinforcing bar net 12 sets up in prefabricated plate body 11, pre-buried reinforcing bar net 12's horizontal muscle stretches out prefabricated plate body 11 with the both ends of indulging the muscle respectively from the side of prefabricated plate body 11 and forms the muscle, truss 13 level is horizontal to be set up, truss 13's lower part sets up in prefabricated plate body 11, truss 13's upper portion protrusion prefabricated plate body 11 top surface, pre-buried connecting piece 14 sets up in prefabricated plate body 11's overlap joint portion, prefabricated plate body 11's overlap joint portion overlap joint in the top surface of girder steel 2.
The embedded connectors 14 are provided as weldable structural members such as steel rectangular plates and bars. The bottom surface of pre-buried connecting piece 14 exposes in the bottom surface of prefabricated plate body 11 and is connected with the top surface of girder steel 2, and the side that links to each other with its bottom surface on the pre-buried connecting piece 14 exposes in the side of the overlap joint portion of prefabricated plate body 11 and is located directly over girder steel 2.
The pre-buried connecting member 14 is preferably set to be a block structure or a rectangular plate member of a cubic structure made of weldable metal materials, and is specifically set to be a rectangular steel base 141, the bottom surface of the base 141 is set to be a horizontal plane and is flush with the bottom surface of the prefabricated plate body 11 to be exposed on the bottom surface of the prefabricated plate body 11, and the bottom surface of the base 141 and the top surface of the steel beam 2 are flatly attached and connected to enable the overlapping part of the prefabricated composite slab 1 to be overlapped on the top surface of the steel beam 2. A side surface of the base 141 connected to the bottom surface thereof is exposed to a side surface of the lap joint portion of the prefabricated composite slab 1 and is positioned right above the steel beam 2, wherein the side surface of the base 141 may be a lateral side surface of the base 141 or a longitudinal side surface, and the side surface of the base 141 is preferably a lateral side surface of the base 141. The bottom surface of the base 141 is set to be a horizontal surface, and is used for being flush with the bottom surface of the prefabricated plate body 11, so that the prefabricated composite slab 1 and the base can be stably placed on the steel beam 2 to create a good welding condition.
The lap joint portion of the prefabricated plate body 11 can be provided with one or more pre-buried connecting pieces 14 as required, and all the pre-buried connecting pieces 14 in the lap joint portion are sequentially arranged at intervals along the length direction, namely the longitudinal direction, of the lap joint portion of the prefabricated plate body 11.
In this embodiment, the embedded connectors 14 are weldable structural members, and are prefabricated in a factory as components of the prefabricated composite slab 1. The bottom surface and one side surface of the pre-buried connecting piece 14 are exposed on the bottom surface and the side surface of the lap joint part of the prefabricated plate body 11, a weldable belt can be formed on the top surfaces of the pre-buried connecting piece 14 and the steel beam 2 after the prefabricated laminated slab 1 is lapped on the steel beam 2, welding conditions are created, the prefabricated laminated slab 1 can be directly connected with the steel beam 2 through welding on the spot, the connecting operation of the prefabricated laminated slab 1 and the steel beam 2 can be simplified, and the structural safety of a floor slab and the steel beam can be improved.
Example 2:
the embodiment is further optimized on the basis of the above embodiment, and in order to further better implement the utility model, the following arrangement structure is particularly adopted:
the embedded connector 14 further includes a stud 142 made of a steel bar, the stud 142 is a straight rod structure with a circular cross section, the stud 142 is vertically arranged and integrally arranged above the base 141, and the bottom end of the stud 142 is fixedly connected to the top surface of the base 141. The top ends of the studs 142 extend upwardly above the top surface of the prefabricated panel body 11.
The studs 142 are located above the base 141, so that the embedded connectors 14 can be firmly combined with the prefabricated slab body 11 through the studs 142, the studs 142 upwardly penetrate out of the top surface of the prefabricated slab body 11 to serve as a structure of a cast-in-place part of the floor slab, so that the prefabricated part of the floor slab and the cast-in-place part of the floor slab are firmly combined, and the integrity of the floor slab can be improved.
Preferably, the stud 142 is vertically arranged, the top end of the stud 142 is provided with an elbow 143, the stud 142 and the elbow 143 are of an integral structure, and the elbow 143 is arranged as a bent rod with a notch facing the top surface of the prefabricated plate body 11. With this arrangement, the provision of the elbows 143 enables the prefabricated and cast-in-place sections of the floor to be better joined, improving the integrity of the floor.
Example 3:
the embodiment is further optimized on the basis of the above embodiment, and in order to further better implement the utility model, the following arrangement structure is particularly adopted:
the prefabricated plate body 11 is internally provided with a U-shaped anchoring rib 4, one embedded connecting piece 14 is connected with the U-shaped anchoring rib 4, the U-shaped anchoring rib 4 is horizontally arranged, and the bending section of the U-shaped anchoring rib is wrapped on the stud 142 of the embedded connecting piece 14. The U-shaped anchoring ribs 4 are connected with the embedded connecting pieces 14 as reinforcing ribs and used for enhancing the structural strength of the positions.
Example 4:
the embodiment is further optimized on the basis of the above embodiment, and in order to further better implement the utility model, the following arrangement structure is particularly adopted:
a groove surface 144 is provided on a side surface of the base 141 facing the overlapping portion of the prefabricated panel body 11, and simultaneously, a bottom corner of the overlapping portion of the prefabricated panel body 11 is provided with a notch 111, the groove surface 144 is exposed at the notch 111 of the overlapping portion of the prefabricated panel body 11, and the groove surface 144 faces obliquely downward and forms a welding groove with the top surface of the steel beam 2.
Preferably, the bevel surface 144 and the elbow 143 are disposed in sequence in the transverse direction of the base 141, and the bevel surface 144 and the elbow 143 are respectively located on two opposite sides of the stud 142.
Under the structure, the bevel face 144 is exposed at the unfilled corner 111, so that a welding groove can be formed between the embedded connecting piece 14 and the steel beam 2, and the joint strength of a welding seam can be improved.
Example 5:
the embodiment is further optimized on the basis of the above embodiment, and in order to further better implement the utility model, the following arrangement structure is particularly adopted:
in this embodiment, two prefabricated superimposed sheet 1 of overlap joint on a girder steel 2, two prefabricated superimposed sheet 1 bilateral symmetry sets up on horizontal, the right side overlap joint portion overlap joint in girder steel 2's top surface at prefabricated superimposed sheet 1 on a left side, the left side overlap joint portion overlap joint in girder steel 2's top surface at prefabricated superimposed sheet 1 on the right side, form the post-cast strip between two prefabricated superimposed sheet 1's the overlap joint portion, 3 connections through the horizontal reinforcement that sets up of level between the vertical muscle 142 of the corresponding pre-buried connecting piece 14 about on two prefabricated superimposed sheet 1, reinforcement 3 can set up to the lacing wire that the straight muscle also can set up the crotch into the tip, reinforcement 3 carries out spot welding with vertical muscle 142 and is connected. Two pre-buried connecting pieces 14 on two prefabricated superimposed sheet 1 are connected to reinforcement 3, can improve two prefabricated superimposed sheet 1's structural strength.
After the steel beam 2 is installed, the prefabricated composite slab 1 is hoisted to an installation part, the lap joint part of the prefabricated composite slab 1 is lapped on the top surface of the steel beam 2, and then the side part exposed by the embedded connecting piece 14 is welded with the top surface of the steel beam 2, so that the prefabricated composite slab 1 can be directly connected with the steel beam 2. The corresponding studs 142 between the two prefabricated composite slabs 1 can then be welded with the reinforcement 3.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention.
Claims (10)
1. The utility model provides a connection structure of prefabricated superimposed sheet with girder steel which characterized in that: comprises a prefabricated laminated slab (1) and a steel beam (2);
the prefabricated composite slab (1) comprises a prefabricated slab body (11) and a pre-embedded connecting piece (14) arranged in the lapping part of the prefabricated slab body (11), and the lapping part of the prefabricated slab body (11) is lapped on the top surface of the steel beam (2); the embedded connecting piece (14) is a weldable structural piece, and the bottom surface of the embedded connecting piece (14) is exposed to the bottom surface of the prefabricated plate body (11) and is connected with the top surface of the steel beam (2); one side surface of the embedded connecting piece (14) connected with the bottom surface of the embedded connecting piece is exposed on the side surface of the lap joint part of the prefabricated plate body (11) and is positioned right above the steel beam (2).
2. The structure for connecting a prefabricated composite slab with a steel beam as claimed in claim 1, wherein: the prefabricated composite slab (1) also comprises a pre-buried reinforcing mesh (12) and a truss (13); the embedded reinforcing mesh (12) is arranged in the prefabricated plate body (11), the lower portion of the truss (13) is arranged in the prefabricated plate body (11), and the upper portion of the truss (13) protrudes out of the top surface of the prefabricated plate body (11).
3. The structure for connecting a prefabricated composite slab with a steel beam as claimed in claim 1, wherein: the overlapping part of the prefabricated plate body (11) is provided with a plurality of embedded connecting pieces (14), and all the embedded connecting pieces (14) are sequentially arranged at intervals along the length direction of the overlapping part of the prefabricated plate body (11).
4. A connecting structure of a prefabricated composite slab and a steel beam as claimed in claim 1, 2 or 3, wherein: the embedded connecting piece (14) comprises a base (141), the base (141) is a weldable metal structural piece, and the bottom surface of the base (141) is exposed to the bottom surface of the prefabricated plate body (11) and is connected with the top surface of the steel beam (2); one side surface connected with the bottom surface of the base (141) is exposed to the side surface of the lap joint part of the prefabricated composite slab (1) and is positioned right above the steel beam (2).
5. The structure of connecting prefabricated composite slab with steel beam as claimed in claim 4, wherein: the embedded connecting piece (14) also comprises a vertical rib (142); the whole of grub steel (142) set up in base (141) top position, the bottom fixed connection of grub steel (142) the top of base (141), the top of grub steel (142) upwards stretches out prefabricated plate body (11) top surface.
6. The structure of connecting prefabricated composite slab with steel beam as claimed in claim 4, wherein: u-shaped anchoring ribs (4) are arranged in the prefabricated plate body (11), one pre-buried connecting piece (14) is connected with one U-shaped anchoring rib (4), and the bending section of the U-shaped anchoring rib (4) wraps the vertical rib (142) of the pre-buried connecting piece (14).
7. The structure of connecting prefabricated composite slab with steel beam as claimed in claim 4, wherein: one the girder steel (2) go up the overlap joint have two prefabricated superimposed sheet (1), two form the post-cast strip between the overlap joint portion of prefabricated superimposed sheet (1), two corresponding on prefabricated superimposed sheet (1) connect through horizontal reinforcement (3) that set up between founding muscle (142) of pre-buried connecting piece (14).
8. The structure of connecting prefabricated composite slab with steel beam as claimed in claim 7, wherein: the reinforcing piece (3) is arranged into a straight rib or a lacing wire.
9. The structure of connecting prefabricated composite slab with steel beam as claimed in claim 5, wherein: the whole vertical setting of grub muscle (142), the top of grub muscle (142) is provided with elbow (143), elbow (143) set up to the breach orientation the knee of prefabricated plate body (11) top surface.
10. A connecting structure of a prefabricated slab and a steel beam as claimed in any one of claims 4 to 9, wherein: a bevel surface (144) is arranged on one side surface of the base (141); the bottom corners of the lap joint parts of the prefabricated plate bodies (11) are provided with unfilled corners (111), the bevel face (144) is exposed at the unfilled corners (111), and the bevel face (144) faces obliquely downwards and forms a welding groove with the top surface of the steel beam (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121664614.1U CN215907016U (en) | 2021-07-21 | 2021-07-21 | Connecting structure of prefabricated superimposed sheet and steel beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121664614.1U CN215907016U (en) | 2021-07-21 | 2021-07-21 | Connecting structure of prefabricated superimposed sheet and steel beam |
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| Publication Number | Publication Date |
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| CN215907016U true CN215907016U (en) | 2022-02-25 |
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| CN202121664614.1U Active CN215907016U (en) | 2021-07-21 | 2021-07-21 | Connecting structure of prefabricated superimposed sheet and steel beam |
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| CN (1) | CN215907016U (en) |
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