Supporting truss and supporting unit

Abstract

The utility model relates to the technical field of building formwork supporting, in particular to a supporting truss and a supporting unit. The supporting truss is used for being arranged between the two supporting vertical rods, and the supporting truss comprises a supporting assembly used for supporting the top plate formwork; the supporting assembly is connected with the connecting frame, the connecting frame is of a polygonal structure, the connecting frame is provided with two connecting ends, and the two connecting ends are connected with the two supporting vertical rods in a one-to-one correspondence mode. By means of the arrangement, the number of the supporting vertical rods can be reduced, and meanwhile it is guaranteed that the supporting strength of the supporting frame to the top plate formwork meets the building design requirement.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building formwork support, and in particular to a support truss and a support unit. BACKGROUND

[0002] The concrete support frame is a temporary support structure used to support the top plate formwork and bear the weight of the concrete and the vibration and pressure generated during pouring. The function of the concrete support frame is to ensure the stability of the top plate formwork during pouring and prevent displacement or deformation of the top plate formwork during pouring.

[0003] The support method commonly used by the concrete support frame for the top plate formwork is as follows: the concrete support frame comprises a plurality of support units, each support unit is provided with a plurality of support uprights, each support upright extends from the ground to the top plate formwork, and the top plate formwork is directly supported by the plurality of support uprights. In this way, each support unit needs to be provided with a large number of support uprights to ensure the support strength of each support unit for the top plate formwork. It can be seen that the support uprights used in the support structure of the support unit of the current support frame are more, and the transportation cost and material cost are higher. CONTENT OF THE INVENTION

[0004] Therefore, the present application provides a support truss and a support unit, which can reduce the number of support uprights while ensuring that the support strength of the support unit of the support frame for the top plate formwork meets the requirements of building design.

[0005] In one aspect of the embodiments of the present application, a support truss is provided, which is arranged between two support uprights. The support truss comprises a support assembly for supporting the top plate formwork, and a connecting frame connected with the support assembly. The connecting frame has a polygonal structure and has two connecting ends connected with the two support uprights one by one.

[0006] Through the above arrangement, the connecting frame with the polygonal structure can replace the original cross bar, so that a support upright does not need to be arranged between the two support uprights, the distance between the two support uprights is increased, and the number of support uprights is reduced. When the support assembly supports the top plate formwork, each "side" of the polygonal structure can share the pressure exerted by the top plate formwork on the support truss, thereby reducing the number of support uprights while ensuring the support strength.

[0007] In at least one embodiment, the connecting frame comprises four connecting rods, and the four connecting rods form a quadrilateral structure.

[0008] By arranging the connecting frame into a quadrilateral structure and sharing the pressure by the four connecting rods, the support strength of the support truss can be ensured.

[0009] In at least one embodiment, the support assembly is one, and the support assembly is arranged on the quadrilateral structure to divide the quadrilateral structure into two triangular structures.

[0010] In this way, the quadrilateral structure forms two stable triangular structures, improving the stress stability of the connecting frame.

[0011] In at least one embodiment, the connecting frame includes six connecting rods, and the six connecting rods form a hexagonal structure.

[0012] By arranging the connecting frame as a hexagonal structure, the connecting frame can be applied to a case where the distance between the two support vertical rods is far, improving the use range of the support truss.

[0013] In at least one embodiment, the support assembly is multiple, and the multiple support assemblies are uniformly distributed on the connecting frame.

[0014] By supporting the top plate formwork with multiple support assemblies, the support stability and support strength can be improved.

[0015] In at least one embodiment, the support assembly includes a support pipe and an adjustable support, the support pipe is connected with the connecting frame; the adjustable support includes a screw rod, a support seat, and a nut, the support seat is used to support the top plate formwork, one end of the screw rod is fixedly connected with the support seat, the screw rod is arranged in the support pipe, the nut is threadedly connected with the screw rod, and the nut is connected with the support pipe and rotates relative to the support pipe.

[0016] By rotating the nut, the length / height of the screw rod can be adjusted upward. In the above support assembly, the support seat is used to support the top plate formwork, the top plate formwork limits the rotation of the support seat, the screw rod is arranged in the support pipe and fixedly connected with the support seat, by rotating the nut, the length of the screw rod extending out of the support pipe can be finely adjusted upward or downward, thereby the height of the support seat is finely adjusted, the top plate formwork is pre-arched by a certain height upward, to offset part of the deformation of the top plate formwork caused by the concrete, thereby reducing the downward bending deformation of the top plate formwork, and in combination with the arrangement of the connecting frame, the structure of the support truss is more stable.

[0017] In at least one embodiment, the connecting frame includes two connecting frames connected with the two support vertical rods one by one, and each connecting frame includes a first connecting rod and a second connecting rod connected with each other, and the first connecting rod and the second connecting rod are arranged at an angle; and one of the first connecting rod and the second connecting rod of each connecting frame is connected with the corresponding support vertical rod.

[0018] Through the above arrangement, the connection between the connecting frame and the support vertical rod is realized, and there is only one connection position between the connecting frame and the support vertical rod, and the connection structure between the connecting frame and the support vertical rod is simple.

[0019] In at least one embodiment, the first connecting rod is connected with the outer circumferential surface of the second connecting rod, the second connecting rod is provided with a connecting head, and the connecting head is provided with a first connecting hole; the support vertical rod is provided with a connecting disc buckle, the connecting disc buckle is provided with a second connecting hole, and the connecting frame and the support vertical rod are fixedly connected through fasteners arranged in the first connecting hole and the second connecting hole.

[0020] Through the above arrangement, the fixed connection between the support vertical rod and the connecting frame is realized, and the outer circumferential surface of the first connecting rod is connected with the outer circumferential surface of the second connecting rod, so that the connection area between the first connecting rod and the second connecting rod can be ensured, thereby ensuring the stability of the connection between the first connecting rod and the second connecting rod.

[0021] In at least one embodiment, the first connecting rod and the second connecting rod are arranged at an acute angle.

[0022] Through the above arrangement, the end part of the acute angle of the polygonal structure can be connected with the support vertical rod, so that the connecting frame can adapt to the longer distance between the two support vertical rods.

[0023] In another aspect of the embodiment of the present application, a support unit is provided, comprising: the above-mentioned support truss; two support vertical rods, the support truss being arranged between the two support vertical rods.

[0024] By arranging the above-mentioned support truss on the support unit, the support truss comprises a connecting frame of a polygonal structure, so that when the support assembly supports the roof template, each "side" of the polygonal structure can share the pressure exerted by the roof template on the support truss, thereby improving the support strength of the support truss. Moreover, the support assembly of the support truss and the support vertical rod jointly support the roof template, thereby ensuring the support strength of the support unit on the roof template, and the number of support vertical rods is reduced because one support vertical rod is not arranged between the two support vertical rods. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structural schematic view of a first embodiment of the support unit of the present application.

[0026] Figure 2 is a structural schematic view of a second embodiment of the support unit of the present application.

[0027] Figure 3 is a structural schematic view of the connecting frame of the support truss of the present application being a rhombus.

[0028] Figure 4 is a structural schematic view of the connecting frame of the support truss of the present application being a hexagon.

[0029] MAIN ELEMENT SYMBOL EXPLANATION

[0030] 100, support vertical rod; 10, support assembly; 20, connecting frame; 201, connecting end; 21, connecting rod; 22, connecting bracket; 11, support pipe; 12, adjustable support; 120, screw rod; 121, support seat; 122, nut; 221, first connecting rod; 222, second connecting rod; 223, connecting head; 2230, first connecting hole; 200, connecting disc buckle; 23, truss reinforcing rod; 30, metal sheet. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0032] The support frame in the related technical means directly supports the top plate formwork through a plurality of support vertical rods of a plurality of support units, and the distance between the two support vertical rods of each support unit needs to be kept within 1.3 m. In this way, a plurality of densely distributed support vertical rods need to be used to support the top plate formwork to ensure the support strength of the support frame body to the top plate formwork. The support vertical rods used in this arrangement form have a large amount of material, and the transportation cost and material cost are high. Increasing the distance between the two support vertical rods can reduce the amount of support vertical rods, but if the distance between the two support vertical rods is directly increased, the support strength of the support unit of the support frame will not be enough.

[0033] In the related art, each support unit includes three support vertical rods and two cross rods, and the uppermost part between the two adjacent support vertical rods is connected by a cross rod to ensure the stability of the structure between the two adjacent support vertical rods through the cross rod. However, if the distance between the two support vertical rods is increased, connecting the two support vertical rods only by the cross rod cannot well ensure the structural stability and support strength of the support vertical rods.

[0034] The embodiments of the present application provide a support truss, which includes a support assembly and a connecting frame, the support assembly is used to support a top plate formwork; the support assembly is connected with the connecting frame, the connecting frame is a polygonal structure, the connecting frame has two connecting ends, and the two connecting ends are connected with two support vertical rods in a one-to-one correspondence. By setting the connecting frame as a polygonal structure, the polygonal connecting frame replaces the original cross rod, and the support assembly replaces the middle support vertical rod of the original three support vertical rods, so that one support vertical rod is no longer needed between the two support vertical rods, reducing the number of support vertical rods. When the support assembly supports the top plate formwork, each "side" of the polygonal structure can share the pressure exerted by the top plate formwork on the support truss, thereby ensuring the support strength while increasing the distance between the two support vertical rods and reducing the number of support vertical rods.

[0035] Some embodiments of the present application will be described in detail with reference to the drawings. The features described in the following embodiments and examples can be combined with each other in the case of no conflict.

[0036] Figure 1 is a structural schematic diagram of a first embodiment of a support unit of the present application. Figure 2 is a structural schematic diagram of a second embodiment of a support unit of the present application.

[0037] Referring to Figure 1 and Figure 2 , the present application provides a support truss for being arranged between two support uprights 100, the support truss comprising a support assembly 10 and a connecting frame 20, the support assembly 10 being used for supporting a roof template, and the support assembly 10 being connected with the connecting frame 20.

[0038] Figure 3 is a structural schematic diagram of a connecting frame of a support truss of the present application being in a diamond shape.

[0039] Referring to Figure 3 , the connecting frame 20 is in a polygonal structure, and the connecting frame 20 has two connecting ends 201, which are connected with the two support uprights 100 in a one-to-one correspondence.

[0040] By arranging the connecting frame 20 in a polygonal structure, the connecting frame 20 in the polygonal structure replaces the original cross bar, and the support assembly 10 replaces the middle support upright of the original three support uprights. When the support assembly 10 supports the roof template, each "side" of the polygonal structure can share the pressure exerted by the roof template on the support truss, thereby improving the support strength, and the two support uprights do not need to be provided with a support upright, thereby reducing the number of support uprights.

[0041] In some embodiments, the connecting frame 20 is symmetrically arranged with a first preset axis as a symmetric axis; wherein the first preset axis is located at a middle position of the connecting frame 20 along the length direction of the support upright 100, and the first preset axis extends along the distribution direction of the two support uprights 100. In this way, the connecting frame 20 is symmetrically arranged on the structure, so that the stress distribution of the connecting frame 20 is uniform, thereby preventing stress concentration of the connecting frame 20 from causing fracture.

[0042] In some embodiments, the connecting frame 20 is symmetrically arranged with a second preset axis as a symmetric axis; wherein the second preset axis is located at a middle position of the connecting frame 20 along the length direction of the support upright 100, and the second preset axis extends along the length direction of the support upright 100. In this way, the connecting frame 20 is symmetrically arranged on the structure, so that the stress distribution of the connecting frame 20 is uniform, thereby preventing stress concentration of the connecting frame 20 from causing fracture.

[0043] Optionally, the connecting frame 20 includes three connecting rods 21, and the three connecting rods 21 form a triangular structure, which is an isosceles triangle structure. In this way, the connecting frame 20 can form a bilaterally symmetrical structure so that the force distribution of the connecting frame 20 is uniform, thereby preventing the connecting frame 20 from being fractured due to stress concentration.

[0044] Preferably, the connecting frame 20 is symmetrically arranged with the first preset axis as the symmetry axis, and the connecting frame 20 is symmetrically arranged with the second preset axis as the symmetry axis. In this way, the connecting frame 20 forms a structure that is symmetrical up and down and left and right, further making the force distribution of the connecting frame 20 uniform, thereby preventing the connecting frame 20 from being fractured due to stress concentration.

[0045] In some embodiments, the support assembly 10 is passed through the connection frame 20 , so that the support assembly 10 can serve as a reinforcement of the connection frame 20 , thereby increasing the support strength of the support truss while supporting the top plate formwork.

[0046] In some embodiments, see Figure 3 The connection frame 20 includes four connection rods 21, and the four connection rods 21 form a quadrilateral structure. By setting the connection frame as a quadrilateral structure, the pressure is shared by the four connection rods, which can ensure the support strength of the support truss.

[0047] In some embodiments, there is one support assembly 10, which is arranged on the quadrilateral structure to divide the quadrilateral structure into two triangular structures. This arrangement allows the quadrilateral structure to form two stable triangular structures, thereby improving the stress stability of the connection frame 20.

[0048] In some embodiments, the four connecting rods 21 have the same length to form a diamond-shaped structure. By configuring the connecting frame 20 as a diamond-shaped structure, the connecting frame 20 forms a vertically symmetrical and a horizontally symmetrical structure, thereby evenly distributing the force on the connecting frame 20.

[0049] In some embodiments, a support assembly 10 is disposed on the diamond structure to form two stable triangular structures.

[0050] Figure 4 This is a schematic structural diagram of a hexagonal connection frame of the support truss of the present application.

[0051] In some embodiments, see Figure 4 The connection frame 20 includes six connection rods 21, and the six connection rods 21 form a hexagonal structure. By setting the connection frame 20 as a hexagonal structure, it can be applied to situations where the distance between the two support poles 100 is far, thereby improving the use range of the support truss.

[0052] In some embodiments, there are multiple support assemblies 10, and the multiple support assemblies 10 are evenly distributed on the connection frame 20. By having multiple support assemblies 10 jointly support the roof formwork, the support stability and support strength can be improved.

[0053] See also Figure 1 and Figure 3 In some embodiments, the support assembly 10 includes a support tube 11 and an adjustable jack 12. The support tube 11 is connected to the connection frame 20. The adjustable jack 12 includes a screw 120, a bracket 121, and a nut 122. The bracket 121 is used to support the top plate formwork. The screw 120 is provided on the support tube 11, and the nut 122 is threadedly connected to the screw 120. The nut 122 is connected to the support tube 11 and rotates relative to the support tube 11. By providing the adjustable jack 12, the length / height of the screw 120 can be adjusted by rotating the nut 122, so that the top plate formwork is pre-arched upward by a certain height to offset the deformation of the top plate formwork exerted by the concrete, thereby reducing the downward bending deformation of the top plate formwork. Combined with the provision of the connection frame 20, the structure of the support truss is more stable.

[0054] Specifically, the second preset axis is the central axis of the support tube 11 , and the first preset axis is perpendicular to the second preset axis.

[0055] In some embodiments, the nut 122 abuts against the end of the support tube 11 .

[0056] See also Figure 1 In some embodiments, the bracket 121 is a flat plate structure. The flat plate bracket 121 is used to support the keel support plate assembly.

[0057] Optionally, an anti-skid rubber strip is provided on the upper surface of the bracket 121, and the anti-skid rubber strip is used to increase the friction between the keel support plate group and the bracket 121. At the same time, the anti-skid rubber strip has a shock-absorbing effect.

[0058] See also Figure 2 In other embodiments, the bracket 121 has a limiting support groove.

[0059] See also Figure 1 and Figure 3 In some embodiments, the connecting frame 20 includes: two connecting frames 22, which are connected to the two supporting poles 100 in a one-to-one correspondence, and the two connecting frames 22 each include a first connecting rod 221 and a second connecting rod 222 connected to each other, and the first connecting rod 221 and the second connecting rod 222 are set at an angle.

[0060] One of the first connecting rod 221 and the second connecting rod 222 of each connecting frame 22 is connected with the corresponding support vertical pole 100. Through the above setting, the connection between the connecting frame 20 and the support vertical pole 100 is realized, and the connection position between the connecting frame 20 and the support vertical pole 100 is only one, and the connection structure between the connecting frame 20 and the support vertical pole 100 is simple.

[0061] In some embodiments, the included angle between the first connecting rod 221 and the second connecting rod 222 ranges from 10° to 50°.

[0062] In some embodiments, referring to Figure 4 , the connecting frame 20 is a hexagonal structure, the hexagonal structure includes two connecting frames 22 and two connecting cross rods, the support assembly 10 is two, and the support pipe 11 of each support assembly 10 is connected with the first connecting rod 221 and the second connecting rod 222 of the corresponding connecting frame 22 respectively. Through the above setting, the support strength of the support truss can be ensured, and at the same time, the support truss can be applied between two support vertical poles 100 far away from each other, the use range of the support truss is improved, and the support strength of the support truss to the roof template is ensured by setting two support assemblies 10.

[0063] In some embodiments, the connecting frame 20 is a hexagonal structure, the support truss includes a truss reinforcing rod 23, the two connecting cross rods of the hexagonal structure are arranged in parallel, the support pipe 11 of the two support assemblies 10 and the two connecting cross rods form a rectangular structure, and the truss reinforcing rod 23 is arranged at the diagonal line of the rectangular structure; wherein the truss reinforcing rod 23 is connected with the support vertical pole 100 and the connecting frame. Through the setting of the truss reinforcing rod 23, the hexagonal connecting frame 20 forms a plurality of stable triangular structures, thereby further improving the support strength of the support truss.

[0064] In some embodiments, referring to Figure 3 , the connecting frame 20 is a diamond structure, the diamond structure has two connecting frames 22, the two connecting frames 22 are connected with the two support vertical poles 100 one by one, the support assembly 10 is one, and the support pipe 11 of the support assembly 10 is connected with the two connecting frames 22. In this way, the support pipe 11 is located at the middle position of the diamond structure, the support truss forms a left-right symmetric and up-down symmetric structure, so that the stress distribution of the support truss is uniform.

[0065] In some embodiments, the first connecting rod 221 is connected to the outer circumferential surface of the second connecting rod 222, the second connecting rod 222 is provided with a connecting head 223, the connecting head 223 is provided with a first connecting hole 2230; the support vertical rod 100 is provided with a connecting disc buckle 200, the connecting disc buckle 200 has a second connecting hole, and the connecting frame 20 and the support vertical rod 100 are fixedly connected through fasteners arranged in the first connecting hole 2230 and the second connecting hole. Through the above arrangement, the fixed connection between the support vertical rod 100 and the connecting frame 20 is realized, and the outer circumferential surface of the first connecting rod 221 is connected to the second connecting rod 222, so that the connection area between the first connecting rod 221 and the second connecting rod 222 can be ensured, thereby ensuring the stability of the connection between the first connecting rod 221 and the second connecting rod 222.

[0066] In some embodiments, the first connecting rod 221 is welded to the outer circumferential surface of the second connecting rod 222, so as to stabilize the connection structure between the first connecting rod 221 and the second connecting rod 222.

[0067] In some embodiments, the second connecting rod 222 is connected to the outer circumferential surface of the first connecting rod 221. Specifically, the second connecting rod 222 is welded to the outer circumferential surface of the first connecting rod 221.

[0068] Specifically, the fastener is a pin piece, and the connecting disc buckle 200 is a disc-shaped structure.

[0069] In some embodiments, the first connecting rod 221 and the second connecting rod 222 of each connecting frame 22 are welded to the outer circumferential surface of the support pipe 11. This arrangement can ensure the connection area between the first connecting rod 221 / second connecting rod 222 and the support pipe 11, and ensure the stability of the connection between the first connecting rod 221 / second connecting rod 222.

[0070] In some embodiments, the first connecting rod 221 and the second connecting rod 222 are arranged at an acute angle. Through the above arrangement, the end portion of the acute angle of the polygonal structure can be connected to the support vertical rod 100, so that the connecting frame 20 can adapt to a longer distance between two support vertical rods 100.

[0071] In some embodiments, as shown in Figure 3 and Figure 4 The support frame further comprises a metal sheet 30 arranged on the support truss.

[0072] In some embodiments, the metal sheet 30 is arranged on one connecting rod 21 of the support truss.

[0073] In some embodiments, the metal sheet 30 is arranged on the support pipe 11 of the support truss.

[0074] In the process of manufacturing the support truss, a metal sheet 30 is welded on the support truss to give the support truss a unique identification information. When the information of the support truss needs to be inquired, the metal sheet 30 is scanned by using a special tool to identify the identification information, and then the support truss information displayed on the support truss production list displayed on the computer is selected, that is, the number is associated with the support truss information and stored. Since the metal sheet number is unique, after the association, the support truss has a unique feature, and the information of the support truss can be inquired only by scanning the metal sheet 30.

[0075] In some embodiments, the identification information can be a number composed of numbers.

[0076] In some embodiments, each connecting rod 21 of the connecting frame 20 is a tubular structure, and the cross section of each connecting rod 21 is circular. Specifically, each connecting rod 21 is a steel pipe. By setting each connecting rod 21 as a tubular structure, the weight of the connecting frame 20 can be reduced, and by setting each connecting rod 21 as a steel pipe, the support strength of the connecting frame 20 can be ensured.

[0077] In some embodiments, the cross section of the support pipe 11 is circular. Specifically, the support pipe 11 is a steel pipe. By setting the support pipe 11 as a tubular structure, the weight of the support pipe 11 can be reduced, and by setting the support pipe 11 as a steel pipe, the support strength of the support pipe 11 can be ensured.

[0078] In some embodiments, the manufacturing material of the metal sheet 30 is the same as that of the connecting rod 21 / support pipe 11 of the support truss.

[0079] In some embodiments, the support upright 100 is a tubular structure, and the cross section of the support upright 100 is circular. Specifically, the support upright 100 is a steel pipe. By setting the support upright 100 as a tubular structure, the weight of the support upright 100 can be reduced, and by setting the support upright 100 as a steel pipe, the support strength of the support upright 100 can be ensured.

[0080] Please refer to Figure 1 and Figure 2 , the application also provides a support unit, comprising: the above-mentioned support truss and two support uprights 100, the support truss is arranged between the two support uprights 100.

[0081] In addition, for those skilled in the art, other various corresponding changes and modifications can be made according to the technical concept of the application, and all these changes and modifications shall belong to the protection scope of the claims of the application.

Claims

1. A support truss, used to be arranged between two support poles, characterized in that: The supporting truss comprises: A support assembly, wherein the support assembly is used to support the top plate formwork; A connecting frame, the supporting assembly is connected to the connecting frame, the connecting frame is a polygonal structure, and the connecting frame has two connecting ends, and the two connecting ends are connected to the two supporting uprights in a one-to-one correspondence.

2. The support truss according to claim 1, wherein: The connection frame includes four connection rods, and the four connection rods form a quadrilateral structure.

3. The support truss according to claim 2, wherein: There is one supporting assembly, and one supporting assembly is arranged on the quadrilateral structure to divide the quadrilateral structure into two triangular structures.

4. The support truss according to claim 1, wherein: The connection frame includes six connection rods, and the six connection rods form a hexagonal structure.

5. The support truss according to claim 1, wherein: There are multiple supporting components, and the multiple supporting components are evenly distributed on the connecting frame.

6. The supporting truss according to any one of claims 1 to 5, characterized in that The support assembly comprises: a supporting tube connected to the connecting frame; The adjustable top support includes a screw, a bracket and a nut. The bracket is used to support the top plate template. One end of the screw is fixedly connected to the bracket. The screw is passed through the support tube. The nut is threadedly connected to the screw. The nut is connected to the support tube and rotates relative to the support tube.

7. The supporting truss according to any one of claims 1 to 5, characterized in that The connection frame includes: Two connecting frames are connected to the two supporting uprights in a one-to-one correspondence, and each of the two connecting frames includes a first connecting rod and a second connecting rod connected to each other, and the first connecting rod and the second connecting rod are arranged at an angle; Wherein, one of the first connecting rod and the second connecting rod of each connecting frame is connected to the corresponding supporting pole.

8. The support truss according to claim 7, wherein: The first connecting rod is connected to the outer circumference of the second connecting rod, the second connecting rod is provided with a connecting head, and the connecting head is provided with a first connecting hole; The support pole is provided with a connecting buckle, and the connecting buckle has a second connecting hole. The connecting frame and the support pole are fixedly connected by fasteners passing through the first connecting hole and the second connecting hole.

9. The support truss according to claim 7, wherein: The first connecting rod and the second connecting rod are arranged at an acute angle.

10. A support unit, characterized in that: include: The support truss according to any one of claims 1 to 9; Two supporting poles, and the supporting truss is arranged between the two supporting poles.

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