CN110980500A - Balanced stress auxiliary hanging beam and roof structure integral hoisting method - Google Patents
Balanced stress auxiliary hanging beam and roof structure integral hoisting method Download PDFInfo
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- CN110980500A CN110980500A CN201911237870.XA CN201911237870A CN110980500A CN 110980500 A CN110980500 A CN 110980500A CN 201911237870 A CN201911237870 A CN 201911237870A CN 110980500 A CN110980500 A CN 110980500A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 123
- 239000010959 steel Substances 0.000 claims abstract description 123
- 238000003466 welding Methods 0.000 claims description 13
- 238000009434 installation Methods 0.000 claims description 12
- 238000013461 design Methods 0.000 claims description 9
- 238000009826 distribution Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 235000013372 meat Nutrition 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 230000002146 bilateral effect Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 22
- 238000011900 installation process Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000009435 building construction Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 230000035939 shock Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/12—Slings comprising chains, wires, ropes, or bands; Nets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
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- Engineering & Computer Science (AREA)
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- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention relates to the field of light steel structure house building construction methods, in particular to a balanced stress auxiliary hanging beam and a roof structure integral hoisting method. Compared with the prior art, the invention has the following beneficial effects: 1) the high-power mechanical equipment can be fully utilized, the construction is simple and safe, and only two workers are required to assemble the device in sequence. 2) The hoisting area is large, the roof truss can be kept stable, and the stress of each steel wire rope is uniform. 3) The angle of the device can be conveniently controlled in the installation process, the angle and the hoisting scheme can be adjusted according to the construction site conditions, the device can be simultaneously constructed with civil engineering, the engineering progress is promoted, and the construction period is guaranteed.
Description
Technical Field
The invention relates to the field of light steel structure house building construction methods, in particular to a balanced stress auxiliary hanging beam and a roof structure integral hoisting method.
Background
The light steel structure mainly refers to a steel structure consisting of thin-wall section steel or high-frequency welding H-shaped steel, and has the following advantages: (1) wind resistance: the light steel is an integral frame formed by light steel such as thin-wall steel or high-frequency welding H-shaped steel, so that the light steel has the characteristics of light self weight and common development of stability and integrity. (2) Durability: the light steel structure is mainly a cold-formed thin-wall steel component system, and the steel skeleton of the light steel structure is further composed of cold-rolled galvanized plates with strong corrosion resistance, so that the corrosion progress of the light steel structure is delayed, and a longer using space is provided for buildings. (3) Shock resistance: in sloping roofs, most of the sloping roofs present a triangular roof truss system, which is a stable shape that is very resistant to earthquakes. And is therefore often used in areas where earthquakes are frequent. (4) And (3) shortcut: the construction can be carried out all the year round, and the construction process is fast.
Although the cost of light steel building is higher than that of the common traditional concrete structure, the light steel building has gained more and more approval in building industry due to the advantages of fast construction, energy conservation, emission reduction and the like, enters the rapid development period in China, and is widely applied to various industries. For example, an industrial factory building is very suitable for using a light steel structure, the span of the industrial factory building is large, and the requirements of the light steel factory building on a roof beam and a roof are high in design and construction due to the large coverage area. Especially in the installation of roofing, all at present with the manual construction as the main, the workman needs the installation of high altitude construction one by one to accomplish one by one, not only the progress is slow, the personal safety risk is big, and the condition such as roof side tilting, gliding easily takes place in the installation moreover, can lead to the position of final installation to deviate from the good roofing mounted position of design, does not accord with the roof slope, and is difficult when revising, but does not revise and lead to the roof atress uneven again, takes place the cracked follow-up problem of roofing easily, brings subsequent hidden danger for the maintenance.
Disclosure of Invention
The invention aims to provide an auxiliary hanging beam with balanced stress and an integral hoisting method of a roof structure, which overcome the defects of the prior art, adopt the auxiliary hanging beam with balanced stress to ensure uniform stress during hoisting, reduce the deformation of a welding part of the roof structure, further avoid the quality defect, high labor intensity and low efficiency of manually installing the roof, fully utilize machinery to replace a manual efficient, simple and economic roof installation method, and greatly improve the installation quality of the roof under the condition of saving the construction period.
In order to achieve the purpose, the invention adopts the following technical scheme:
the first technical scheme is as follows: the auxiliary hanging beam with balanced stress is characterized by comprising a beam body and steel wire rope groups, wherein the steel wire rope groups are composed of 6-16 steel wire ropes with the same size and specification, the distribution number and the spacing of the steel wire ropes on the beam body are consistent with those of purlins on a roof structural member, the steel wire ropes are hung in hanging points of the beam body, the hanging points are provided with limiting grooves, and two end portions of each steel wire rope are respectively provided with a rope ring.
The beam body is I-shaped steel, H-shaped steel or a beam-shaped structure formed by buckling and welding two channel steels.
The steel wire ropes are connected by steel wire rope buckles to form a steel wire rope ring which bypasses the lifting point below the beam body.
The rope ring is a jointless rope ring or a pressed rope ring.
The upper surface bilateral symmetry of roof beam body is equipped with two national standard eyebolt.
The second technical scheme is as follows: the auxiliary hanging beam with balanced stress is characterized by comprising a beam body and steel wire rope groups, wherein the steel wire rope groups consist of 6-16 steel wire ropes with the same size and specification, the distribution number and the spacing of the steel wire ropes on the beam body are consistent with those of purlins on a roof structural member, the steel wire ropes are hung in hanging points of the beam body, the hanging points are provided with a limiting groove, and two end parts of each steel wire rope are respectively provided with a rope ring; the beam bodies and the steel wire rope groups are arranged in parallel, and the two beam bodies are connected into a whole through the reinforcing connecting rod.
The third technical scheme is as follows: the integral hoisting method for the roof structure is characterized by comprising the following operation steps of:
1) welding and assembling a roof structural part to be installed on the ground according to the design, wherein the total weight of the roof structural part is within the safe hoisting parameter range of a crane;
2) arranging the number and the intervals of the lifting points on the auxiliary lifting beam according to the number and the intervals of the purlins on the roof structural member, wherein the distances between the lifting points correspond to the distances between the purlins, hanging a plurality of steel wire ropes with the same size and specification on the limiting grooves of each lifting point, and tying the steel wire ropes into the same steel wire rope ring by winding the steel wire rope rings around the lifting points;
3) before hoisting, the auxiliary hoisting beam is used as a support member, a plurality of steel wire ropes are connected with each hoisting point of the roof structural member at the lower side, and a rope ring at the end part of each steel wire rope is fixed on a limit pin of the hoisting point on the roof structural member through a steel pin;
4) the two ends of a crane steel wire rope are hung on the ring lug bolts on the auxiliary hanging beams, the crane hook is lifted, the auxiliary hanging beams are lifted, the length and the angle of each steel wire rope under the auxiliary hanging beams are adjusted, the integral gradient of the roof structural part is the same as the gradient of the roof, the crane is started to hoist, when the roof structural part ascends to the corresponding position of the roof beam frame, the crane hook is stabilized, then the roof structural part is installed on the roof beam frame according to the design requirement, the crane hook is loosened after the installation, the steel pin is taken down, and the auxiliary hanging beams are removed.
The limiting pin is made of steel bars 12 mm-20 mm thick, 2 limiting pins are arranged in parallel at a lifting point from top to bottom, the limiting pin penetrates through a mounting hole at the lifting point and blocks a joint between the limiting pin and the mounting hole through welding meat, and the limiting pin is 50mm higher than the surface of a lifting point material at least.
Compared with the prior art, the invention has the following beneficial effects:
1) can make full use of high-power mechanized equipment, the construction is simple, and is safe: the existing roof installation method is that workers below hang a roof and pull a roof beam and then place the roof beam at a corresponding position for assembly, and therefore construction difficulty is high and safety risk is high. By utilizing the hoisting method, the roof structural member is well assembled on the ground and hoisted by a crane, only two workers are needed to assemble the roof structural member in sequence, the construction process is simple, and the safety factor is high.
2) The hoisting area is large, and all steel wire ropes are stressed uniformly: according to the method provided by the invention, an auxiliary hanging beam is used for supporting in the hoisting process, and meanwhile, 8 to 16 steel wire ropes are used for hoisting, so that the auxiliary hanging beam can be kept to be in a straight line in the hoisting process, and the hoisting is integrally prevented from being deformed.
3) The lifting point is designed at the position, connected with the roof structural member, on the auxiliary lifting beam, the stable and non-sliding roof structure can be ensured during lifting, the integral stable lifting of the roof structural member is ensured, and the mounting quality is improved.
4) The angle and the hoisting scheme are adjusted according to the construction site conditions, the construction can be carried out simultaneously with civil engineering, the engineering progress is promoted, in the conventional roof construction, the construction area span is large, the difficulty is high, the consumed time is long, and the installation problem often occurs in the construction and rework is needed, so that the construction period is delayed.
Drawings
FIG. 1 is a schematic structural view of an embodiment of an auxiliary suspension beam with balanced stress according to the present invention;
FIG. 2 is an enlarged view of a portion A of FIG. 1;
FIG. 3 is a schematic view of an embodiment of an auxiliary beam with balanced stress according to the present invention;
FIG. 4 is an enlarged view of a portion B of FIG. 3;
fig. 5 is a schematic view of a second implementation state of an auxiliary hanging beam with balanced stress according to an embodiment of the invention.
In the figure: 1-beam body, 2-steel wire rope, 3-hoisting point, 4-steel plate, 5-rope loop, 6-steel wire rope buckle, 7-roof structural member, 8-purlin, 9-national standard lifting bolt, 10-crane steel wire rope, 11-reinforcing connecting rod, 12-steel pin and 13-limit pin.
Detailed Description
The following examples are presented to further illustrate embodiments of the present invention:
in the description of the present invention, it should 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; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-2, the structural schematic diagram of an embodiment of the balanced stress auxiliary hanging beam comprises a beam body 1 and a steel wire rope group, wherein the steel wire rope group is composed of 6 steel wire ropes 2 with the same size and specification, the distribution number and the spacing of the steel wire ropes 2 on the beam body 1 are consistent with those of purlins 8 on a roof structural member 7, the steel wire ropes 2 are hung in hanging points 3 of the beam body 1, the hanging points 3 are provided with limiting grooves formed by oppositely arranging two steel plates 4 and welding the two steel plates on the beam body 1, and two end parts of the steel wire ropes 2 are respectively provided with a rope ring 5. The steel wire rope 2 is connected into a steel wire rope ring which bypasses the lifting point 3 by a steel wire rope buckle 6 below the beam body 1. The hoisting point 3 is used for positioning the steel wire rope 2 and preventing the steel wire rope from sliding along the length direction of the beam body 1 in the hoisting process. The loop 5 is a pressed loop. Two international lifting bolts 9 are symmetrically arranged on the left and right of the upper surface of the beam body 1. The national standard eyebolt 9 is used for connecting a crane wire rope 10.
The beam body 1 is made of I-shaped steel or H-shaped steel or a beam-shaped structure formed by buckling and welding two channel steels. In the embodiment, the beam body 1 is made of a section of I-steel.
Because a plurality of steel wire ropes 2 with the same size and specification are arranged below the beam body in parallel, the stress of each lifting point is balanced and consistent, and the steel wire ropes are easy to adjust. The auxiliary suspension beam of the present invention solves this problem.
Referring to fig. 3 to 4, which are schematic views of an implementation state of an embodiment of the balanced stress auxiliary hanging beam, the operation steps are as follows:
1) welding and assembling the roof structural member 7 to be installed on the ground according to the design, wherein the total weight of the roof structural member is within the safe hoisting parameter range of a crane, and the hoisting route and the distance both meet the requirements of safety regulations;
2) arranging the number and the intervals of the hoisting points 3 on the auxiliary hoisting beam 1 according to the number (6) and the intervals of the purlins 8 on the roof structural member 7, wherein the distances between the hoisting points correspond to the distances between the purlins 8, hanging 6 steel wire ropes 2 with the same size and specification on limiting grooves of each hoisting point 3, and tying the steel wire ropes 2 to form the same steel wire rope ring by winding the steel wire rope buckles 6 around the hoisting points 3;
3) before hoisting, the auxiliary hoisting beam 1 is used as a support member, the lower 6 steel wire ropes 2 are connected with each hoisting point of a roof structural member 7, a rope ring at the end part of each steel wire rope 2 is fixed on a limiting pin 13 of each hoisting point on the roof structural member through a steel pin 12, and the distance between a steel wire rope buckle 6 on each steel wire rope 2 and each hoisting point is adjusted, so that the 6 lengths of one side of the auxiliary hoisting beam 1 are the same, and the 6 lengths of the other side of the auxiliary hoisting beam 1 are the same, and the aim is to ensure that the steel wire ropes are stressed uniformly and reduce the deformation of the roof structural member;
4) the two ends of a crane steel wire rope 10 are hung on national standard ring lug bolts 9 on the auxiliary hanging beam 1, the crane hook is lifted, the auxiliary hanging beam 1 is lifted, the length and the angle of each steel wire rope 2 under the auxiliary hanging beam are adjusted again, the integral gradient of the roof structural part 7 is the same as the roof gradient, the crane is started to hoist, when the crane hook ascends to the corresponding position of the roof beam frame, the crane hook is stabilized, then the roof structural part is installed on the roof beam frame according to the design requirement, the crane hook is loosened after the installation is finished, a steel pin 12 is taken down, the auxiliary hanging beam 1 is removed, and the operation is finished.
The limiting pin 12 is made of steel bars 12 mm-20 mm thick, 2 limiting pins 12 are arranged in parallel at a lifting point from top to bottom, the limiting pin 12 penetrates through a mounting hole at the lifting point and blocks a joint between the limiting pin and the mounting hole through welding meat, and the limiting pin is 50mm higher than the surface of a lifting point material at least. The arrangement positions of the limiting pins 12 on the purlins 8 on the roof structural member 7 are consistent.
Fig. 5 is a schematic view of a second implementation state of an embodiment of the balanced stress auxiliary hanging beam, which comprises beam bodies 1 and steel wire rope groups, wherein the two beam bodies and the two steel wire rope groups are arranged in parallel, and the two beam bodies 1 are connected into a whole through a reinforcing connecting rod 11. This structure is suitable for 200m2And the roof structural member with the ultra-large area.
The method for simultaneously hoisting the roof structural member effectively solves the problems that the roof can only be sequentially and respectively hoisted and installed when being installed, and the roof structural member is easy to shift and deform in the installation process, utilizes common materials in a construction site to manufacture the auxiliary main beam as a support, enables the roof structural member to be synchronously hoisted to a corresponding position for installation after being assembled, welded and installed on the ground according to design requirements, solves the problems of slow construction, poor quality, high risk and low benefit of the traditional installation process, shortens the construction period, improves the quality, increases the safety guarantee, and simultaneously can ensure that the whole roof structural member is not deformed in the hoisting process.
The above embodiments are merely specific examples selected for illustrating the objects, technical solutions and advantages of the present invention in detail, and should not be construed as limiting the scope of the present invention, and various modifications, equivalent substitutions and improvements can be made without departing from the spirit and principle of the present invention.
Claims (8)
1. The auxiliary hanging beam with balanced stress is characterized by comprising a beam body and steel wire rope groups, wherein the steel wire rope groups are composed of 6-16 steel wire ropes with the same size and specification, the distribution number and the spacing of the steel wire ropes on the beam body are consistent with those of purlins on a roof structural member, the steel wire ropes are hung in hanging points of the beam body, the hanging points are provided with limiting grooves, and two end portions of each steel wire rope are respectively provided with a rope ring.
2. The auxiliary hanging beam with balanced stress of claim 1, wherein the beam body is an I-shaped steel, an H-shaped steel or a beam-shaped structure formed by buckling and welding two channel steels.
3. The balanced force auxiliary hanging beam as claimed in claim 1, wherein the steel wire ropes are connected by steel wire rope buckles under the beam body to form a steel wire rope ring which bypasses the hanging point.
4. The balanced force auxiliary hoist beam of claim 1, characterized in that the loop is a jointless loop or a pressed loop.
5. The auxiliary lifting beam with balanced stress as claimed in claim 1, wherein the upper surface of the beam body is provided with two international lifting eye bolts in bilateral symmetry.
6. The auxiliary hanging beam with balanced stress is characterized by comprising a beam body and steel wire rope groups, wherein the steel wire rope groups consist of 6-16 steel wire ropes with the same size and specification, the distribution number and the spacing of the steel wire ropes on the beam body are consistent with those of purlins on a roof structural member, the steel wire ropes are hung in hanging points of the beam body, the hanging points are provided with a limiting groove, and two end parts of each steel wire rope are respectively provided with a rope ring; the beam bodies and the steel wire rope groups are arranged in parallel, and the two beam bodies are connected into a whole through the reinforcing connecting rod.
7. The integral hoisting method for the roof structure is characterized by comprising the following operation steps of:
1) welding and assembling a roof structural part to be installed on the ground according to the design, wherein the total weight of the roof structural part is within the safe hoisting parameter range of a crane;
2) arranging the number and the intervals of the lifting points on the auxiliary lifting beam according to the number and the intervals of the purlins on the roof structural member, wherein the distances between the lifting points correspond to the distances between the purlins, hanging a plurality of steel wire ropes with the same size and specification on the limiting grooves of each lifting point, and tying the steel wire ropes into the same steel wire rope ring by winding the steel wire rope rings around the lifting points;
3) before hoisting, the auxiliary hoisting beam is used as a support member, a plurality of steel wire ropes are connected with each hoisting point of the roof structural member at the lower side, and a rope ring at the end part of each steel wire rope is fixed on a limit pin of the hoisting point on the roof structural member through a steel pin;
4) the two ends of a crane steel wire rope are hung on the ring lug bolts on the auxiliary hanging beams, the crane hook is lifted, the auxiliary hanging beams are lifted, the length and the angle of each steel wire rope under the auxiliary hanging beams are adjusted, the integral gradient of the roof structural part is the same as the gradient of the roof, the crane is started to hoist, when the roof structural part ascends to the corresponding position of the roof beam frame, the crane hook is stabilized, then the roof structural part is installed on the roof beam frame according to the design requirement, the crane hook is loosened after the installation, the steel pin is taken down, and the auxiliary hanging beams are removed.
8. The integral hoisting method for the roof structure according to claim 7, wherein the limiting pins are made of steel bars with the thickness of 12 mm-20 mm, 2 limiting pins are arranged side by side from top to bottom at one hoisting point, the limiting pins penetrate through the mounting holes at the hoisting point and are blocked by welding meat at the joints of the limiting pins and the mounting holes, and the limiting pins are at least 50mm higher than the material surface of the hoisting point.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911237870.XA CN110980500A (en) | 2019-12-06 | 2019-12-06 | Balanced stress auxiliary hanging beam and roof structure integral hoisting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911237870.XA CN110980500A (en) | 2019-12-06 | 2019-12-06 | Balanced stress auxiliary hanging beam and roof structure integral hoisting method |
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| CN110980500A true CN110980500A (en) | 2020-04-10 |
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| CN201911237870.XA Pending CN110980500A (en) | 2019-12-06 | 2019-12-06 | Balanced stress auxiliary hanging beam and roof structure integral hoisting method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111717780A (en) * | 2020-07-09 | 2020-09-29 | 中铁六局集团天津铁路建设有限公司 | Bridge sleeper conveyer |
| CN114482561A (en) * | 2021-12-23 | 2022-05-13 | 中国华冶科工集团有限公司 | Steel structure roof installation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2965408A (en) * | 1958-05-23 | 1960-12-20 | John D Edwards | Apparatus for mounting purlins on a roof under structure |
| CN101967887A (en) * | 2009-07-28 | 2011-02-09 | 中冶成工上海五冶建设有限公司 | Large-span light steel structure roof girder hoisting method |
| CN204265221U (en) * | 2014-11-27 | 2015-04-15 | 北钢管业（营口）有限公司 | A kind of super large-scale hoisting steel plate instrument |
| CN104989109A (en) * | 2015-07-20 | 2015-10-21 | 中博农畜牧科技股份有限公司 | Method for lifting roof girders and purlines at the same time |
| CN207346983U (en) * | 2017-10-27 | 2018-05-11 | 中国铁建大桥工程局集团有限公司 | A kind of suspender for cored slab lifting |
| CN211664537U (en) * | 2019-12-06 | 2020-10-13 | 中国三冶集团有限公司 | Balanced stress auxiliary hanging beam |
-
2019
- 2019-12-06 CN CN201911237870.XA patent/CN110980500A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2965408A (en) * | 1958-05-23 | 1960-12-20 | John D Edwards | Apparatus for mounting purlins on a roof under structure |
| CN101967887A (en) * | 2009-07-28 | 2011-02-09 | 中冶成工上海五冶建设有限公司 | Large-span light steel structure roof girder hoisting method |
| CN204265221U (en) * | 2014-11-27 | 2015-04-15 | 北钢管业（营口）有限公司 | A kind of super large-scale hoisting steel plate instrument |
| CN104989109A (en) * | 2015-07-20 | 2015-10-21 | 中博农畜牧科技股份有限公司 | Method for lifting roof girders and purlines at the same time |
| CN207346983U (en) * | 2017-10-27 | 2018-05-11 | 中国铁建大桥工程局集团有限公司 | A kind of suspender for cored slab lifting |
| CN211664537U (en) * | 2019-12-06 | 2020-10-13 | 中国三冶集团有限公司 | Balanced stress auxiliary hanging beam |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111717780A (en) * | 2020-07-09 | 2020-09-29 | 中铁六局集团天津铁路建设有限公司 | Bridge sleeper conveyer |
| CN114482561A (en) * | 2021-12-23 | 2022-05-13 | 中国华冶科工集团有限公司 | Steel structure roof installation method |
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