Steel tower structure

Abstract

To provide a steel tower structure capable of preventing a load applied to the steel tower from increasing while preventing snow or ice attached to the steel tower from scattering from the steel tower.SOLUTION: In a steel tower 10, lower ends 14C of all diagonal members 14 are arranged so as to overlap with a main column member 12 seen from a longitudinal direction of the diagonal member 14 at a coupled part 12B of the main column member 12 to which the lower ends 14C of the plurality of diagonal members 14 are coupled.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a tower structure. [Background technology]

[0002] Patent Document 1 below describes an invention related to a device for preventing snow from falling from a steel tower. This device for preventing snow from falling from a steel tower can prevent snow from falling to places away from the steel tower by placing a net on the front or side of the steel tower. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-221686 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-mentioned prior art, by attaching a net to a steel tower, the load caused by the mass of the net and the wind pressure acting on the net acts on the steel tower. In other words, the above-mentioned prior art has room for improvement in terms of suppressing the increase in the load on the steel tower while suppressing the scattering of snow, ice, etc. adhering to the steel tower.

[0005] In consideration of the above facts, the present invention aims to provide a tower structure that can prevent snow, ice, etc. adhering to the tower from flying off the tower while suppressing an increase in the load on the tower. [Means for solving the problem]

[0006] The tower structure of the first aspect comprises a plurality of main pillar members that form part of the tower, and a plurality of diagonal members that form part of the tower and are connected to the main pillar members directly or via members, and the diagonal members are connected to the inner surface of the tower at the main pillar members in a state where all of the lower ends of the diagonal members are arranged to overlap with the main pillar members when viewed in the longitudinal direction of the diagonal members at predetermined locations where the lower ends of the plurality of diagonal members are connected, and the diagonal members are composed of angle steel including a first plate-shaped portion and a second plate-shaped portion that is continuous with the first plate-shaped portion, and the diagonal members are arranged so that the first plate-shaped portion is located below the height of the tower and the second plate-shaped portion is located outside the tower.

[0007] In the steel tower structure according to the first aspect, a part of the steel tower is made up of a plurality of main pillar members and a plurality of diagonal members connected to the main pillar members directly or via members. Since the lower ends of the plurality of diagonal members are connected to predetermined locations on the main pillar members, snow, ice, etc. adhering to these diagonal members slide down toward the predetermined locations.

[0008] Incidentally, when snow, ice, etc. attached to the diagonal members slide down along the diagonal members, if there is nothing to obstruct them, they may be accelerated by gravity and scattered to places far away from the tower.

[0009] In this embodiment, at a predetermined location on the main post to which the lower ends of multiple diagonal members are connected, all diagonal members are arranged so that their lower ends overlap the main post when viewed in the longitudinal direction of the diagonal members. These diagonal members are connected to the inner surfaces of the main post members of the steel tower. Therefore, when snow, ice, etc. adhering to the diagonal members slide down along the diagonal members, they collide with the inner surfaces of the main post members of the steel tower and fall near the steel tower. In other words, in this embodiment, snow, ice, etc. adhering to the steel tower can be dropped within the steel tower site or nearby without using a net or the like.

[0010] In this embodiment, the diagonal member is composed of an angle iron including a first plate-shaped portion and a second plate-shaped portion continuous with the first plate-shaped portion. The diagonal member is arranged such that the first plate-shaped portion is located below the height of the pylon and the second plate-shaped portion is located outside the pylon. Therefore, in this embodiment, when snow, ice, etc. accumulated on the first plate-shaped portion slides down along the first plate-shaped portion, scattering of the snow, ice, etc. to the outside of the pylon is restricted by the second plate-shaped portion.

[0011] A steel tower structure according to a second aspect is the steel tower structure according to the first aspect, wherein the main pillar material is made of angle iron.

[0012] In the tower structure according to the second aspect, the main columns are made of angle steel, so that when snow, ice, etc. adhering to the diagonal members slide down along the diagonal members, they strike at least one of the two inner faces of the main columns on the tower. As a result, in this aspect, compared to a configuration in which the main columns are cylindrical, it is possible to increase the likelihood that snow, ice, etc. adhering to the diagonal members will fall toward the inside of the tower.

[0013] The tower structure of the third aspect is the tower structure of the first or second aspect, in which the diagonal members are connected to the main pillar material via main pillar connecting members.

[0014] According to the tower structure of the third aspect, the diagonal members can be connected to the main pillar material via the main pillar connecting members, which increases the surface area to which the diagonal members can be connected compared to a configuration in which the diagonal members are connected directly to the main pillar material, and allows the diagonal members to be fixed in a stable state.

[0015] The tower structure of the fourth aspect is a tower structure of any one of the first to third aspects, wherein the plurality of diagonal members include a first diagonal member and a second diagonal member that extend in a predetermined direction between the pair of main pillar members and are arranged in series in the predetermined direction, and further comprises a diagonal member connecting member that connects a first end of the first diagonal member opposite one of the pair of main pillar members to a second end of the second diagonal member opposite the other of the pair of main pillar members, and a horizontal member that is connected to the diagonal member connecting member and that is stretched between the pair of main pillar members and passes above the first end in the vertical direction and below the second end in the vertical direction.

[0016] According to the tower structure of the fourth aspect, a first diagonal member and a second diagonal member extending in a predetermined direction are arranged between a pair of main pillar members and connected in the predetermined direction. A first end of the first diagonal member opposite one of the pair of main pillar members and a second end of the second diagonal member opposite the other of the pair of main pillar members are connected by a diagonal member connecting member. Therefore, even if the gap between the pair of main pillar members is long, the main pillar members can be connected obliquely with respect to the height direction of the tower.

[0017] However, as the distance between the main pillars becomes longer, the diagonal members connecting them also become longer, and when snow, ice, etc. attached to the diagonal members slide down along the diagonal members, it is possible that they will fall off before hitting the main pillars.

[0018] Here, in this embodiment, a horizontal member spanning a pair of main pillar members is connected to the connecting member for the diagonal member, and the horizontal member passes above the first end of the first diagonal member in the vertical direction of the tower and below the second end of the second diagonal member in the vertical direction.

[0019] Therefore, in this embodiment, snow, ice, etc. sliding down along the first diagonal member will hit the main column member and fall, and snow, ice, etc. sliding down along the second diagonal member will hit the horizontal member and fall. Therefore, in this embodiment, it is possible to increase the probability that snow, ice, etc. adhering to the steel tower will fall near the steel tower even if the distance between the main column members is long. [Effects of the Invention]

[0020] As described above, the tower structure of the present invention has the excellent effect of suppressing the scattering of snow, ice, etc. adhering to the tower from the tower while suppressing an increase in the load on the tower. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a cross-sectional view (a cross-sectional view showing a state cut along line 1-1 in FIG. 3) that schematically shows the configuration of a main part of the steel tower according to the first embodiment. [Figure 2] FIG. 2 is a perspective view schematically showing the configuration of the main part of the steel tower according to the first embodiment. [Figure 3] FIG. 2 is a side view seen from outside the tower, schematically showing the configuration of the tower according to the first embodiment. [Figure 4] FIG. 1 is a front view schematically showing the overall configuration of a steel tower according to a first embodiment. [Figure 5] FIG. 10 is a side view seen from inside the tower, schematically showing the configuration of a main part of a steel tower according to a modified example of the first embodiment. [Figure 6] FIG. 10 is a side view seen from outside the tower, schematically showing the configuration of the tower according to the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0022] First Embodiment A first embodiment of a steel tower structure according to the present invention will be described below with reference to Figures 1 to 5. As shown in Figures 3 and 4, a "steel tower 10" to which the steel tower structure according to this embodiment is applied is constructed on flat ground and is, as an example, a square steel tower, and is configured to include a plurality of "main pillar members 12," a plurality of "diagonal members 14" as first diagonal members, a plurality of "diagonal members 16" as second diagonal members, and a plurality of "horizontal members 18."

[0023] In the following, unless otherwise specified, the height direction of the steel tower 10 will be simply referred to as the height direction, the inside of the steel tower 10 will be referred to as the steel tower inside, and the outside of the steel tower 10 will be referred to as the steel tower outside. In addition, in this embodiment, the height direction of the steel tower 10 coincides with the vertical direction, and the height direction is indicated by arrow Z in each drawing.

[0024] The main pillar materials 12 are arranged at the four corners of the steel tower 10 in a plan view, are made of angle iron, and have a pair of plate-shaped portions 12A as shown in Fig. 2. Each of the main pillar materials 12 extends in the height direction, and is arranged so that the corner portions are located outside the steel tower when viewed in the height direction.

[0025] The main pillar members 12 are positioned so that adjacent plate-like portions 12A of adjacent main pillar members 12 in a first direction and a second direction perpendicular to the first direction are located on the same plane in a plan view. In each drawing, the first direction is indicated by an arrow X, and the second direction is indicated by an arrow Y.

[0026] The main pillar material 12 also has a "connected portion 12B" as a predetermined location, and in the connected portion 12B, a plurality of insertion holes 20, specifically three insertion holes 20 (see Figure 1), are formed in the plate-like portion 12A along the longitudinal direction of the main pillar material 12. The diagonal members 14 and 16 are connected to the connected portion 12B directly or via members. The connected portions 12B are set at a plurality of locations at predetermined intervals along the longitudinal direction of the main pillar material 12.

[0027] The diagonal member 14 is made of angle steel and extends upward from the connected portion 12B. The diagonal member 14 is composed of a "plate portion 14A" as a first plate portion that constitutes the lower portion in the height direction, and a "plate portion 14B" as a second plate portion that constitutes the outer portion of the tower and is continuous with the plate portion 14A.

[0028] 1, at the "lower end 14C" of the diagonal member 14, one insertion hole 30 is provided in the plate-like portion 14B, and the insertion hole 30 and the insertion hole 20 located in the center in the height direction among the three insertion holes 20 provided in the plate-like portion 12A are connected via a fastening portion 22 including a fastening member such as a bolt. The lower end 14C of the diagonal member 14 is located inside the steel tower with respect to the plate-like portion 12A.

[0029] In this embodiment, by connecting the lower end 14C of the diagonal member 14 to the connected portion 12B as described above, the lower end 14C of the diagonal member 14 is arranged so as to overlap the main post member 12 when viewed in the longitudinal direction of the diagonal member 14. This is the same for all diagonal members 14 connected to the connected portion 12B.

[0030] 2 and 3, the diagonal member 16 is made of angle steel and extends downward from the connected portion 12B. The diagonal member 16 is also made up of a "plate portion 16A" as a first plate portion that constitutes the lower portion in the height direction of the diagonal member 16, and a "plate portion 16B" as a second plate portion that constitutes the outer portion of the tower and is continuous with the plate portion 16A.

[0031] The upper end 16C of the diagonal member 16 is connected to the connected part 12B via a "connecting gusset 24" which serves as a connecting member for the main column, and the lower end 16D of the diagonal member 16 is connected to the upper end 14D of the diagonal member 14 via a "connecting plate 26" which serves as a connecting member for the diagonal member.

[0032] More specifically, the connecting gusset 24 is rectangular in shape with its height direction as viewed from the front, and is plate-shaped with its thickness direction as the thickness direction of the plate-shaped portion 12A. A portion of this connecting gusset 24 is arranged along the main post members 12, and a portion extends from one main post member 12 toward the other main post member 12 adjacent to it in the X or Y direction. In the following, the portion of the connecting gusset 24 arranged along the main post member 12 will be referred to as the mounting portion 24A, and the portion of the connecting gusset 24 extending from the main post member 12 will be referred to as the extending portion 24B.

[0033] Furthermore, the mounting portion 24A is provided with a plurality of insertion holes 28 (see FIG. 1) corresponding to the insertion holes 20, and the connecting gusset 24 is connected to the main column material 12 by fastening the insertion holes 20 and the insertion holes 28 via fastening portions 22. The connecting gusset 24 is fastened together with the lower end portion 14C of the diagonal member 14.

[0034] On the other hand, a plurality of (two in this embodiment) insertion holes 32 (see FIG. 1) are provided in the lower portion of the extension portion 24B in the height direction along the extension direction of the diagonal member 16. Furthermore, at the upper end portion 16C of the diagonal member 16, two insertion holes 34 (see FIG. 1) corresponding to the insertion holes 32 are provided in the plate-shaped portion 16B (see FIG. 1), and the upper end portion 16C of the diagonal member 16 is connected to the connecting gusset 24 by fastening the insertion holes 32 and the insertion holes 34 via the fastening portions 22. The upper end portion 16C of the diagonal member 16 is arranged inside the tower relative to the connecting gusset 24.

[0035] In this embodiment, by connecting the upper end 16C of the diagonal member 16 to the connectable portion 12B as described above, the upper end 16C of the diagonal member 16 is arranged so as to overlap the main post member 12 when viewed in the longitudinal direction of the diagonal member 16, as shown in Figures 1 and 2. This is the same for all diagonal members 16 connected to the connectable portion 12B.

[0036] 3, the connecting plate 26 is square in front view and has a plate-like shape with its thickness direction set in the same direction as the thickness direction of the plate-shaped portion 12 A. The diagonal member 16 is connected to the upper part of the connecting plate 26 in the height direction, the horizontal member 18 is connected to the center part of the connecting plate 26 in the height direction as described below, and the diagonal member 14 is connected to the lower part of the connecting plate 26 in the height direction.

[0037] More specifically, a through-hole (not shown) is provided at each of the four corners of the connecting plate 26. The upper through-holes in the height direction among these through-holes are connected to through-holes (not shown) provided in the plate-like portions 16B at the lower ends 16D of the diagonal members 16 via fastening portions 22. The plate-like portions 16B are in contact with the connecting plate 26 from the inside of the tower.

[0038] On the other hand, among the insertion holes at the four corners of the connecting plate 26, the insertion holes on the lower side in the height direction are connected to insertion holes (not shown) provided in the plate-like portion 14B at the upper end portion 14D of the diagonal member 14 via fastening portions 22. The plate-like portion 14B is in contact with the connecting plate 26 from the inside of the tower.

[0039] In this embodiment, as described above, the diagonal members 14 and 16 are connected to the connecting plate 26, so that adjacent main column members 12 in the first direction or the second direction are connected by the diagonal members 14 and 16 arranged in a series in a predetermined direction.

[0040] On the other hand, the horizontal member 18 is made up of angle steel and extends horizontally, and is composed of a plate-shaped portion 18A that forms the lower part of the height direction, and a plate-shaped portion 18B that forms the outer part of the tower and is continuous with the plate-shaped portion 18A.

[0041] At both ends of the horizontal member 18, the plate-shaped portion 18B has an insertion hole portion (not shown), and the plate-shaped portion 18B is abutted from the inside of the tower against the connected portion 12C located between adjacent connected portions 12B in the plate-shaped portion 12A of the main pillar material 12.

[0042] In addition, the connected portion 12C has a through-hole portion (not shown) that corresponds to the through-hole portion provided at the end of the horizontal member 18, and the through-hole portion at the end of the horizontal member 18 and the through-hole portion of the connected portion 12C are connected via the fastening portion 22, so that the horizontal member 18 is suspended between a pair of main column members 12.

[0043] Furthermore, in the central portion of horizontal member 18, plate-shaped portion 18B is provided with a plurality of (three in this embodiment) insertion holes (not shown) arranged in a row in the extension direction of horizontal member 18, and a plurality of insertion holes corresponding to these insertion holes are provided in the central portion of connecting plate 26 in the height direction. Then, with plate-shaped portion 18B abutting against connecting plate 26 from the inside of the tower, the insertion holes in the central portion of horizontal member 18 and the insertion holes in the central portion of connecting plate 26 in the height direction are connected via fastening portion 22.

[0044] Furthermore, by connecting the horizontal member 18 to the connecting plate 26 as described above, the horizontal member 18 is inserted horizontally between the lower end 16D of the diagonal member 16 and the upper end 14D of the diagonal member 14.

[0045] (Actions and Effects of This Embodiment) Next, the operation and effects of this embodiment will be described.

[0046] In this embodiment, as shown in Fig. 3, a part of the steel tower 10 is made up of a plurality of main pillar members 12 and a plurality of diagonal members 14 connected to the main pillar members 12. As also shown in Fig. 2, the lower ends 14C of the plurality of diagonal members 14 are connected to the connected portions 12B of the main pillar members 12, so that snow, ice, etc. adhering to these diagonal members 14 slide down toward the connected portions 12B.

[0047] Incidentally, when snow, ice, etc. adhering to the diagonal member 14 slides down along the diagonal member 14, if there is nothing to obstruct it, it is thought that they will be accelerated by gravity and scattered to a location far away from the steel tower 10.

[0048] 1, in this embodiment, at the connected portions 12B of the main pillar members 12 to which the lower ends 14C of the plurality of diagonal members 14 are connected, all of the diagonal members 14 are arranged so that their lower ends 14C overlap the main pillar members 12 when viewed in the longitudinal direction of the diagonal members 14. These diagonal members 14 are connected to the inner surfaces of the main pillar members 12 on the pylon. Therefore, when snow, ice, etc. adhering to the diagonal members 14 slide down along the diagonal members 14, they collide with the inner surfaces of the main pillar members 12 on the pylon and fall near the pylon 10. In other words, in this embodiment, snow, ice, etc. adhering to the pylon 10 can be dropped within the premises of the pylon 10 or nearby without using a net or the like.

[0049] In this embodiment, the diagonal member 14 is composed of an angle iron including a plate-shaped portion 14A and a plate-shaped portion 14B that is continuous with the plate-shaped portion 14A. The diagonal member 14 is arranged such that the plate-shaped portion 14A is located lower in the height direction and the plate-shaped portion 14B is located outside the tower. Therefore, in this embodiment, when snow, ice, etc. that has accumulated on the plate-shaped portion 14A slides down along the plate-shaped portion 14A, scattering of the snow, ice, etc. to the outside of the tower is restricted by the plate-shaped portion 14B.

[0050] 2, in this embodiment, since the main pillars 12 are made of angle steel, when snow, ice, etc. adhering to the diagonal members 14 slide down along the diagonal members 14, they collide with at least one of the two inner faces of the main pillars 12 on the tower side. As a result, in this embodiment, compared to a configuration in which the main pillars 12 are cylindrical, it is possible to increase the likelihood that snow, ice, etc. adhering to the diagonal members 14 will fall toward the inside of the tower.

[0051] In addition, in this embodiment, as shown in Figure 3, the diagonal member 16 that constitutes part of the steel tower 10 can be connected to the main pillar member 12 via a connecting gusset 24, so that the surface area to which the diagonal member 16 can be connected is wider than in a configuration in which the diagonal member 16 is directly connected to the main pillar member 12, and the diagonal member 16 can be fixed in a stable state.

[0052] Additionally, in this embodiment, the diagonal members 14 and 16 extending in a predetermined direction are arranged in series between the pair of main pillar members 12. An upper end 14D of the diagonal member 14 on the side opposite one of the pair of main pillar members 12 and a lower end 16D of the diagonal member 16 on the side opposite the other of the pair of main pillar members 12 are connected by a connecting plate 26. Therefore, even if the gap between the pair of main pillar members 12 is long, the main pillar members 12 can be connected obliquely in the height direction.

[0053] However, as the distance between the main pillars 12 becomes longer, the diagonal members connecting them also become longer, and when snow, ice, etc. attached to the diagonal members slide down along the diagonal members, it is possible that they will fall off before hitting the main pillars 12.

[0054] Here, in this embodiment, a horizontal member 18 spanning a pair of main pillar members 12 is connected to the connecting plate 26, and the horizontal member 18 passes vertically above the upper end 14D of the diagonal member 14 and vertically below the lower end 16D of the diagonal member 16.

[0055] For this reason, in this embodiment, snow, ice, etc. sliding down along the diagonal members 14 will hit the main pillar members 12 and fall, and snow, ice, etc. sliding down along the diagonal members 16 will hit the horizontal members 18 and fall. For this reason, in this embodiment, it is possible to increase the probability that snow, ice, etc. adhering to the steel tower 10 will fall near the steel tower 10 even if the distance between the main pillar members 12 is long.

[0056] In this way, the tower structure of this embodiment can suppress an increase in the load on the tower 10 while suppressing snow, ice, etc. adhering to the tower 10 from scattering from the tower 10.

[0057] <Modification of the first embodiment> Next, a modified example of the first embodiment will be described with reference to Figure 5. In the first embodiment described above, the diagonal members 16 are connected to the main pillar members 12 via connecting gussets 24, but if a wide surface area can be secured on the main pillar members 12 to which the diagonal members 16 can be connected, the diagonal members 16 may be directly connected to the main pillar members 12.

[0058] With this configuration, the weight of the steel tower 10 can be reduced compared to a configuration in which the diagonal member 16 and the main pillar member 12 are connected via a connecting gusset 24.

[0059] Second Embodiment Next, the configuration of a "tower 50" to which a tower structure according to a second embodiment of the present invention is applied will be described with reference to Figure 6. Note that the same components as those in the first embodiment described above are given the same numbers and their description will be omitted.

[0060] In this embodiment, the "main pillar material 52" is made of a cylindrical steel pipe, and at the portion of the main pillar material 52 outside the steel tower, the connecting gusset 24 is joined to a predetermined location, the "connected portion 52A," at a joint such as welding. Also, in this embodiment, the lower end portion 14C of the diagonal member 14 is connected to the connecting gusset 24 via the fastening portion 22. Note that the lower end portion 14C is located inside the steel tower relative to the connecting gusset 24.

[0061] Furthermore, both ends of the horizontal member 18 are connected to the main column member 52 via connecting gussets 54 which have the same configuration as the connecting gussets 24. The ends of the horizontal member 18 are located inside the tower relative to the connecting gussets 54.

[0062] According to this configuration, the same functions and effects as those of the first embodiment described above can be achieved.

[0063] In addition, in this embodiment, the diagonal members 14, 16 and horizontal members 18 are connected to the main pillar member 52 via members, which simplifies the replacement work of the diagonal members 14, 16 and horizontal members 18 compared to a configuration in which these members are attached directly to the main pillar member 52.

[0064] Furthermore, in this embodiment, since the main pillar material 52 is made of steel pipes, the main pillar material 52 can be filled with concrete or the like depending on the specifications of the steel tower 50, etc.

[0065] <Supplementary explanation of the above embodiment> (1) In the above-described embodiment, no particular components are provided at the portions of the main posts that overlap with the diagonal members as viewed from the longitudinal direction of the diagonal members, but this is not limiting. For example, a configuration may be adopted in which multiple protrusions for crushing snow and ice are provided at the portions of the main posts that overlap with the diagonal members as viewed from the longitudinal direction of the diagonal members.

[0066] (2) In the above-described embodiment, the steel tower is painted for rust prevention, etc., but the steel tower may also be painted for other purposes. For example, a water-repellent and slippery paint containing paraffin wax or the like may be applied to the top surfaces of the diagonal members and to the portions of the main pillar members that overlap with the diagonal members when viewed in the longitudinal direction of the diagonal members, to make it difficult for snow, ice, etc. to adhere to the steel tower.

[0067] (3) In addition, in the above-described embodiment, the steel tower is provided with horizontal members, but the configuration of the steel tower is not limited to this. For example, depending on the specifications of the steel tower, the steel tower may be configured without horizontal members, thereby simplifying the configuration of the steel tower. [Explanation of symbols]

[0068] 10 Steel Tower 12 Main pillar material 12B Connected part (specified location) 14 Diagonal member (1st diagonal member) 14A Plate-shaped portion (first plate-shaped portion) 14B plate-shaped portion (second plate-shaped portion) 14C Bottom end 16 Diagonal member (second diagonal member) 16A Plate-shaped portion (first plate-shaped portion) 16B Plate-shaped portion (second plate-shaped portion) 18 Horizontal material 24 Connecting gusset (connecting member for main column) 26 Connecting plate (connecting member for diagonal members) 50 Steel Tower 52 Main pillar material 52A Connected part (specified location)

Claims

1. A plurality of main pillars that form part of the steel tower; A plurality of diagonal members that form part of the steel tower and are connected directly or via members to the main pillar members; Equipped with At predetermined locations where the lower ends of the plurality of diagonal members on the main pillar material are connected, the diagonal members are connected to the inner surface of the steel tower on the main pillar material in a state where all of the lower ends are arranged so as to overlap with the main pillar material when viewed from the longitudinal direction of the diagonal members, The diagonal member is composed of an angle steel including a first plate-shaped portion and a second plate-shaped portion continuous with the first plate-shaped portion, The diagonal member is arranged with the first plate-shaped portion located on the lower side of the steel tower in the height direction and the second plate-shaped portion located on the outer side of the steel tower. Steel tower structure.

2. The main pillar material is made of angle iron. The tower structure according to claim 1.

3. The diagonal member is connected to the main column member via a main column connecting member. The tower structure according to claim 1 or 2.

4. The plurality of diagonal members include a first diagonal member and a second diagonal member extending in a predetermined direction between the pair of main pillar members and arranged in series in the predetermined direction, Further provided is a diagonal member connecting member that connects a first end portion of the first diagonal member opposite one of the pair of main pillar members and a second end portion of the second diagonal member opposite the other of the pair of main pillar members, A horizontal member is connected to the diagonal member connecting member, the horizontal member being bridged between the pair of main pillar members and passing above the first end portion in the height direction and below the second end portion in the height direction. The tower structure according to any one of claims 1 to 3.

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