CN114250896A - Exempt from to tear open formula cement basement board steel bar truss floor carrier plate - Google Patents
Exempt from to tear open formula cement basement board steel bar truss floor carrier plate Download PDFInfo
- Publication number
- CN114250896A CN114250896A CN202111312373.9A CN202111312373A CN114250896A CN 114250896 A CN114250896 A CN 114250896A CN 202111312373 A CN202111312373 A CN 202111312373A CN 114250896 A CN114250896 A CN 114250896A
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- Prior art keywords
- steel bar
- cement
- metal mesh
- base plate
- footed
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 98
- 239000010959 steel Substances 0.000 title claims abstract description 98
- 239000004568 cement Substances 0.000 title claims abstract description 39
- 239000002184 metal Substances 0.000 claims abstract description 52
- 238000003466 welding Methods 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000005452 bending Methods 0.000 claims description 28
- 239000004744 fabric Substances 0.000 claims description 17
- 239000000835 fiber Substances 0.000 claims description 14
- 230000002787 reinforcement Effects 0.000 claims description 11
- 239000003365 glass fiber Substances 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 239000010960 cold rolled steel Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 22
- 230000003014 reinforcing effect Effects 0.000 abstract description 16
- 238000006073 displacement reaction Methods 0.000 abstract description 8
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 22
- 229910001335 Galvanized steel Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000008397 galvanized steel Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000011505 plaster Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
- E04B5/17—Floor structures partly formed in situ
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
- E04C5/0627—Three-dimensional reinforcements composed of a prefabricated reinforcing mat combined with reinforcing elements protruding out of the plane of the mat
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention provides a disassembly-free type floor bearing plate of a cement foundation plate steel bar truss, which comprises: a main structure and a plurality of groups of truss components. The main structure comprises a metal mesh sheet and a cement-based slab, wherein the metal mesh sheet is poured inside the bottom of the cement-based slab; wherein, every group truss subassembly all includes two band foot web member reinforcing bars, a last chord reinforcing bar and two last chord reinforcing bars. According to the disassembly-free cement base plate steel bar truss floor support plate, the bottom of the steel bar with the foot web member is welded with the upper part of the metal grid sheet through the butt-welding process, full-mechanical industrial welding can be adopted, manpower is effectively reduced, displacement between the metal grid sheet and the steel bar with the foot web member can be reduced to the maximum extent after welding, a procedure of fixing the metal grid sheet and the steel bar with the foot web member can be reduced, the overall bearing strength is high, the construction load is borne, the overall weight is light, large-scale mechanical construction is not needed, and the construction difficulty can be effectively reduced.
Description
Technical Field
The invention relates to the technical field of buildings, in particular to a disassembly-free type floor bearing plate of a cement base plate steel bar truss.
Background
The butt welding of the steel plate and the steel bar truss formed by pressing for supporting the floor concrete is called a steel bar truss profiled combined steel plate, which is called a steel bar truss floor bearing plate and a steel bar truss steel bearing plate. The floor support plate is widely used for steel structure buildings such as power plants, power equipment companies, automobile exhibition halls, steel structure plants, cement storehouses, steel structure offices, airport terminal buildings, railway stations, stadiums, music halls, large theaters, large supermarkets, logistics centers and stadiums. The method is suitable for the requirement of rapid construction of a main steel structure, can provide a firm operation platform in a short time, and can adopt a plurality of floors to lay profiled steel sheets and pour concrete slabs in layers in the flow construction.
Although the requirement of the quick construction of main part steel construction is adapted to present floor carrier plate, can provide firm work platform in the short time, its still has following defect in the use:
because the galvanized steel plate bottom plate can not be plastered, a suspended ceiling is required, a large amount of space is occupied, the engineering construction cost is increased, the whole displacement deformation is large, and the whole body is not flat after bearing construction load, and the impression effect is poor.
Therefore, the disassembly-free concrete base plate steel bar truss floor deck is provided.
Disclosure of Invention
The invention aims to solve the problems that a galvanized steel plate bottom plate cannot be plastered, a suspended ceiling is required, a large amount of space is occupied, the engineering cost is increased, the integral displacement deformation is large, and the floor support plate is uneven after bearing construction load and poor in appearance effect, and provides the disassembly-free concrete base plate steel bar truss floor support plate.
The specific technical scheme is as follows:
a disassembly-free concrete-based slab steel bar truss floor deck, comprising:
the main body structure comprises a metal mesh sheet and a cement-based slab, wherein the metal mesh sheet is poured inside the bottom of the cement-based slab.
The disassembly-free type floor bearing plate with the cement base plate and the steel bar trusses further comprises a plurality of truss assemblies, each truss assembly comprises two web member steel bars with feet, an upper chord steel bar and two lower chord steel bars, the bottoms of the two web member steel bars with feet are poured inside the cement base plate, the bottoms of the two web member steel bars with feet are welded with the upper portion of the metal grid sheet through a butt-welding process, the upper chord steel bar is welded between the upper portions of the two web member steel bars with feet, and the two lower chord steel bars are respectively welded on the side portions of the two web member steel bars with feet.
The disassembly-free type floor bearing plate with the cement base plate and the steel bar truss is characterized in that the main body structure further comprises fiber gridding cloth, the fiber gridding cloth is laid at the bottom of the metal gridding sheet, the fiber gridding cloth, the metal gridding sheet and the cement base plate form an integrated structure, and the fiber gridding cloth is glass fiber gridding cloth.
In the disassembly-free concrete base plate steel bar truss floor support plate, the web member steel bar with the foot is provided with a first V-shaped bending part and a second V-shaped bending part, and the second V-shaped bending part is adjacent to the first V-shaped bending part.
In the disassembly-free concrete base plate steel bar truss floor support plate, the height of the first V-shaped bending part is greater than that of the second V-shaped bending part, and the included angle between the first V-shaped bending part and the second V-shaped bending part is 120-150 degrees.
The diameter of each of the footed web member steel bar, the upper chord steel bar and the lower chord steel bar is 6-12mm, the footed web member steel bar is HRB400 or cold-rolled steel bar with performance equivalent to CRB550, and the upper chord steel bar and the lower chord steel bar are HRB400 or HPB300 steel bars.
The disassembly-free type cement-based plate steel bar truss floor bearing plate is characterized in that the metal grid sheet is a Q235B metal grid sheet, the surface of the metal grid sheet is provided with a hot-dip galvanized layer, the diameter of steel wires on the metal grid sheet is 1-2 mm, and the diameter of a steel wire mesh is (25-30) mm.
The invention has the following beneficial effects:
the disassembly-free cement base plate steel bar truss floor support plate provided by the invention has the advantages that the bottom of the steel bar with the foot web members is welded with the upper part of the metal grid sheet through the butt-welding process, the full-mechanical industrialized welding can be adopted, the manpower is effectively reduced, the displacement between the metal grid sheet and the steel bar with the foot web members can be reduced to the maximum extent after the welding, the procedure of fixing the metal grid sheet and the steel bar with the foot web members can be reduced, simultaneously, materials such as a binding belt and the like used for fixing the metal grid sheet and the steel bar with the foot web members are saved, in addition, after the cement base plate is poured, the metal grid sheet, the cement base plate, the steel bar with the foot web members, the upper chord steel bar and the lower chord steel bar form an integral structure, so that the integral bearing strength of the disassembly-free cement base plate steel bar truss floor support plate is larger, the bearing construction load is larger, the integral weight is light, and large-scale mechanized construction is not needed, can effectively reduce the construction degree of difficulty, through using this exempt from to tear open formula cement base plate steel bar truss building carrier plate for galvanized steel sheet bottom plate bottom can plaster, need not to do the furred ceiling, and occupation space is little, has reduced engineering construction cost, makes whole displacement deformation less, can guarantee that it is after bearing construction load, wholly still can keep leveling, and the impression effect is better.
Drawings
FIG. 1 is a schematic structural diagram of a steel bar truss floor deck of a disassembly-free concrete-based slab according to an embodiment of the invention;
FIG. 2 is an enlarged schematic view of a portion A of FIG. 1;
fig. 3 is a schematic structural view of the footed web member reinforcing steel bar of the non-dismantling concrete-based slab steel bar truss floor deck according to the embodiment of the present invention.
In the drawings:
1. fiber mesh cloth; 2. a metal mesh sheet; 3. a cementitious substrate board; 4. reinforcing steel bars of web members with feet; 41. a first V-shaped bending part; 42. a second V-shaped bending part; 5. upper chord steel bars; 6. and (5) lower chord steel bars.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not indicated or implied that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as a limitation of the present patent, and the specific meanings of the terms may be understood by those skilled in the art according to specific situations.
In the description of the present invention, unless otherwise explicitly specified or limited, the term "connected" or the like, if appearing to indicate a connection relationship between the components, is to be understood broadly, for example, as being either fixedly connected or detachably connected, or integrated; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other or mutually interacted. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiment of the invention provides a disassembly-free type floor bearing plate of a steel bar truss of a cement-based plate, which is shown in figures 1-3 and comprises: a main structure and a plurality of groups of truss components.
The main structure comprises a metal mesh sheet 2 and a cement-based slab 3, wherein the cement-based slab 3 is poured on the upper part of the metal mesh sheet 2, so that the metal mesh sheet 2 is poured inside the bottom of the cement-based slab 3.
Wherein, every group truss subassembly all includes two band foot web member reinforcing bars 4, an upper chord reinforcing bar 5 and two lower chord reinforcing bars 6, and the inside at cement base plate 3 is all pour to the bottom of two band foot web member reinforcing bars 4, and the bottom of two band foot web member reinforcing bars 4 all welds through butt-joint welding process and metal mesh sheet 2's upper portion, and upper chord reinforcing bar 5 welds between the upper portion of two band foot web member reinforcing bars 4, and two lower chord reinforcing bars 6 weld respectively the lateral part at two band foot web member reinforcing bars 4.
The disassembly-free type concrete base plate steel bar truss floor support plate arranged by adopting the technical scheme mainly comprises a metal grid sheet 2, a concrete base plate 3, a web member steel bar with feet 4, an upper chord steel bar 5 and a lower chord steel bar 6, and the disassembly-free type concrete base plate steel bar truss floor support plate formed under the common matching of the metal grid sheet 2, the concrete base plate 3, the web member steel bar with feet 4, the upper chord steel bar 5 and the lower chord steel bar 6 has the following advantages:
the bottom of the web member reinforcing steel bar 4 with feet is welded with the upper part of the metal grid sheet 2 through butt-welding process, can adopt full-mechanized industrialized welding, effectively reduce manpower, can reduce the displacement between the metal grid sheet 2 and the web member reinforcing steel bar 4 with feet to the maximum extent after welding, can reduce a procedure for fixing the metal grid sheet 2 and the web member reinforcing steel bar 4 with feet, meanwhile, materials such as a binding belt and the like used for fixing the metal grid sheet 2 and the web member reinforcing steel bar 4 with the feet are saved, in addition, after the cement-based slab 3 is poured, the metal grid sheet 2, the cement-based slab 3, the web member reinforcing steel bars 4 with feet, the upper chord reinforcing steel bars 5 and the lower chord reinforcing steel bars 6 form an integral structure, the integral bearing strength of the floor bearing plate of the disassembly-free cement foundation plate steel bar truss is high, the integral weight is light, large-scale mechanical construction is not needed, and the construction difficulty can be effectively reduced.
Specifically, in this embodiment, the main structure further includes a fiber mesh cloth 1, the fiber mesh cloth 1 is laid on the bottom of the metal mesh sheet 2, and the fiber mesh cloth 1, the metal mesh sheet 2 and the cement-based slab 3 form an integral structure, the fiber mesh cloth 1 is a glass fiber mesh cloth, and the fiber mesh cloth 1 can prevent the concrete flow from being wasted everywhere when the cement-based slab 3 is poured.
Specifically, in this embodiment, the footed web member reinforcing bar 4 is provided with a first V-shaped bending portion 41 and a second V-shaped bending portion 42, the second V-shaped bending portion 42 is adjacent to the first V-shaped bending portion 41, the first V-shaped bending portion 41 enables the footed web member reinforcing bar 4 to be connected to the upper chord reinforcing bar 5, and the second V-shaped bending portion 42 enables the footed web member reinforcing bar 4 to be connected to the metal mesh sheet 2.
Specifically, in this embodiment, the height of the first V-shaped bending portion 41 is greater than the height of the second V-shaped bending portion 42, and the included angle between the first V-shaped bending portion 41 and the second V-shaped bending portion 42 is 150 degrees, so that the truss assembly composed of the two footed web member steel bars 4, the upper chord steel bar 5 and the two lower chord steel bars 6 is triangular, and the structure of the truss assembly is relatively stable.
Specifically, in this embodiment, the diameters of the footed web member reinforcing steel bar 4, the upper chord reinforcing steel bar 5 and the lower chord reinforcing steel bar 6 are all 6-12mm, the footed web member reinforcing steel bar 4 is an HRB400 or a cold-rolled reinforcing steel bar with performance equivalent to that of a CRB550, and the upper chord reinforcing steel bar 5 and the lower chord reinforcing steel bar 6 are both HRB400 or HPB300 reinforcing steel bars, so that the overall structure of the constructed truss assembly is relatively stable.
Specifically, in this embodiment, the metal mesh sheet 2 is a Q235B metal mesh sheet, and the surface of the metal mesh sheet 2 has a hot-dip galvanized layer, the diameter of the steel wires on the metal mesh sheet 2 is 1-2 mm, and the steel wire mesh is (25-30) mm × 25-30 mm. The arrangement ensures that the constructed non-dismantling concrete base plate steel bar truss floor bearing plate has larger integral bearing construction load.
In conclusion, the removal-free concrete base plate steel bar truss floor support plate provided by the embodiment has the following advantages:
the bottom of the web member reinforcing steel bar 4 with feet is welded with the upper part of the metal grid sheet 2 through butt-welding process, can adopt full-mechanized industrialized welding, effectively reduce manpower, can reduce the displacement between the metal grid sheet 2 and the reinforcement bar 4 of the web member with feet to the maximum extent after welding, can reduce a procedure for fixing the metal grid sheet 2 and the reinforcement bar 4 of the web member with feet, meanwhile, materials such as a binding belt and the like used for fixing the metal grid sheet 2 and the footed web member reinforcing steel bar 4 are saved, in addition, after the cement base plate 3 is poured, the metal grid sheet 2, the cement base plate 3, the footed web member reinforcing steel bar 4, the upper chord reinforcing steel bar 5 and the lower chord reinforcing steel bar 6 form an integral structure, the integral bearing strength of the floor bearing plate of the disassembly-free cement foundation plate steel bar truss is high, the integral weight is light, large-scale mechanical construction is not needed, and the construction difficulty can be effectively reduced.
Through using this exempt from to tear open formula cement basement board steel bar truss floor carrier plate for galvanized steel sheet bottom plate bottom can plaster, need not to do the furred ceiling, and occupation space is little, has reduced engineering construction cost, makes whole displacement deformation less, can guarantee that it is bearing construction load after, whole still can keep leveling, and the impression effect is better.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (7)
1. The utility model provides a exempt from to tear open formula cement base plate steel bar truss floor carrier plate which characterized in that includes:
a body structure comprising a metal mesh sheet (2) and a cement based slab (3), the metal mesh sheet (2) being poured inside the bottom of the cement based slab (3).
2. The detachment-free concrete base plate and steel bar truss floor deck as claimed in claim 1, further comprising a plurality of sets of truss assemblies, each set of truss assembly comprises two footed web reinforcements (4), an upper chord reinforcement (5) and two lower chord reinforcements (6), the bottoms of the two footed web reinforcements (4) are poured inside the concrete base plate (3), the bottoms of the two footed web reinforcements (4) are welded with the upper part of the metal mesh sheet (2) through a butt-welding process, the upper chord reinforcement (5) is welded between the upper parts of the two footed web reinforcements (4), and the two lower chord reinforcements (6) are respectively welded at the side parts of the two footed web reinforcements (4).
3. The non-dismantling concrete base plate steel bar truss floor deck as recited in claim 2, characterized in that the main structure further comprises a fiber mesh cloth (1), the fiber mesh cloth (1) is laid on the bottom of the metal mesh sheet (2), and the fiber mesh cloth (1), the metal mesh sheet (2) and the concrete base plate (3) form an integral structure, and the fiber mesh cloth (1) is a glass fiber mesh cloth.
4. The disassembly-free cement base plate steel bar truss floor deck as recited in claim 2, wherein the footed web member steel bar (4) is provided with a first V-shaped bending part (41) and a second V-shaped bending part (42), and the second V-shaped bending part (42) is arranged adjacent to the first V-shaped bending part (41).
5. The detachment-free concrete base plate steel bar truss floor deck as claimed in claim 4, wherein the height of the first V-shaped bending part (41) is greater than that of the second V-shaped bending part (42), and the included angle between the first V-shaped bending part (41) and the second V-shaped bending part (42) is 120-150 degrees.
6. The disassembly-free concrete-based plate steel bar truss floor deck as claimed in claim 2, wherein the diameters of the footed web steel bar (4), the upper chord steel bar (5) and the lower chord steel bar (6) are all 6-12mm, the footed web steel bar (4) is HRB400 or cold rolled steel bar with performance equivalent CRB550, and the upper chord steel bar (5) and the lower chord steel bar (6) are both HRB400 or HPB300 steel bars.
7. The detachment-free cement-based plate steel bar truss floor deck as claimed in claim 1, wherein the metal mesh sheet (2) is a Q235B metal mesh sheet, the surface of the metal mesh sheet (2) is provided with a hot-dip galvanized layer, the diameter of steel wires on the metal mesh sheet (2) is 1-2 mm, and the diameter of a steel wire mesh is (25-30) mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111312373.9A CN114250896A (en) | 2021-11-08 | 2021-11-08 | Exempt from to tear open formula cement basement board steel bar truss floor carrier plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111312373.9A CN114250896A (en) | 2021-11-08 | 2021-11-08 | Exempt from to tear open formula cement basement board steel bar truss floor carrier plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114250896A true CN114250896A (en) | 2022-03-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111312373.9A Pending CN114250896A (en) | 2021-11-08 | 2021-11-08 | Exempt from to tear open formula cement basement board steel bar truss floor carrier plate |
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| Country | Link |
|---|---|
| CN (1) | CN114250896A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108532808A (en) * | 2018-04-28 | 2018-09-14 | 刘鹏飞 | A kind of steel truss hollow pre-fabricated panels |
| CN113833188A (en) * | 2021-09-23 | 2021-12-24 | 浙江汉德邦建材有限公司 | Steel bar truss building carrier plate convenient to processing |
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| CN207878747U (en) * | 2018-02-07 | 2018-09-18 | 山东亮普建材科技有限公司 | A kind of laminated floor slab prefabricated board |
| CN110258927A (en) * | 2019-06-05 | 2019-09-20 | 浙江绿筑集成科技有限公司 | A kind of production method of orthogonal bar frame superimposed sheet |
| CN110424605A (en) * | 2019-07-03 | 2019-11-08 | 云南联固建筑材料有限公司 | A kind of steel bar girder composite floor |
| CN211286217U (en) * | 2019-10-22 | 2020-08-18 | 杨志业 | Steel bar truss floor support plate and building |
| CN112324037A (en) * | 2020-11-23 | 2021-02-05 | 威海齐德新型建材有限公司 | Steel bar truss prestressed concrete laminated slab and manufacturing method thereof |
| CN113250365A (en) * | 2021-05-28 | 2021-08-13 | 中国建筑科学研究院有限公司 | Bottom die removal-free steel bar truss floor support plate and construction method thereof |
-
2021
- 2021-11-08 CN CN202111312373.9A patent/CN114250896A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207878747U (en) * | 2018-02-07 | 2018-09-18 | 山东亮普建材科技有限公司 | A kind of laminated floor slab prefabricated board |
| CN110258927A (en) * | 2019-06-05 | 2019-09-20 | 浙江绿筑集成科技有限公司 | A kind of production method of orthogonal bar frame superimposed sheet |
| CN110424605A (en) * | 2019-07-03 | 2019-11-08 | 云南联固建筑材料有限公司 | A kind of steel bar girder composite floor |
| CN211286217U (en) * | 2019-10-22 | 2020-08-18 | 杨志业 | Steel bar truss floor support plate and building |
| CN112324037A (en) * | 2020-11-23 | 2021-02-05 | 威海齐德新型建材有限公司 | Steel bar truss prestressed concrete laminated slab and manufacturing method thereof |
| CN113250365A (en) * | 2021-05-28 | 2021-08-13 | 中国建筑科学研究院有限公司 | Bottom die removal-free steel bar truss floor support plate and construction method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108532808A (en) * | 2018-04-28 | 2018-09-14 | 刘鹏飞 | A kind of steel truss hollow pre-fabricated panels |
| CN113833188A (en) * | 2021-09-23 | 2021-12-24 | 浙江汉德邦建材有限公司 | Steel bar truss building carrier plate convenient to processing |
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Application publication date: 20220329 |