Building anchor cable structure

Abstract

The utility model discloses a building anchor cable structure which comprises a ground anchoring assembly, a first rope connecting structure and a second rope connecting structure. The two bolts are arranged left and right at an interval and connected with nuts, and a through hole is formed in the center; the steel rope connecting assemblies are movably arranged in the penetrating holes in the two bolts in a penetrating mode, the opposite ends of the two steel rope connecting assemblies are provided with second rope connecting structures, and the opposite ends of the two steel rope connecting assemblies are provided with third rope connecting structures; one ends of the two first steel wire ropes are connected with the first rope connecting structures on the corresponding sides, and the other ends are connected with the second rope connecting structures on the corresponding sides; and the second steel wire rope connects the two steel wire rope connecting assemblies which are arranged left and right at intervals in series. Due to the arrangement of the first steel wire rope and the second steel wire rope, the ground anchoring assembly and the steel wire rope connecting assembly are effectively connected, series connection of structures on the left side and the right side is achieved, and the overall resistance of a building structure is enhanced. The stability and the bearing capacity of the building structure are improved, the deformation of the structure is effectively controlled, and the service life of the building is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to building reinforcement technical field, in particular, relate to a building anchor cable structure. BACKGROUND

[0002] In order to improve the structural strength of building, especially in some harsh external environment scene, such as port, can be subjected to greater wind force, the reinforcement of building appears more important.Usually building reinforcement will adopt the form of cable or inclined strut. But the existing cable reinforcement mode is still relatively simple, and the cable on both sides of the building is independently set, so that the unilateral structure can only be reinforced in one direction, and the overall performance and anti-deformation ability still have deficiencies. SUMMARY

[0003] The utility model discloses at least solve one of the technical problems in prior art. For this purpose, the utility model provides a building anchor cable structure.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] A building anchor cable structure, comprising: ground anchoring assembly, pre-buried in ground, left and right interval arrangement, the first rope connection structure of ground anchoring assembly upper end is equipped with the ground protruding, the bolt, left and right interval arrangement has two, is located ground anchoring assembly upper, and is located two ground anchoring assembly middle, the bolt is connected with the nut on to connect and fix first tension carrier and second tension carrier, the bolt center is equipped with the perforation, the steel rope connection assembly, left and right interval arrangement has two, and respectively active wear is equipped with in two bolt's perforation, the steel rope connection assembly is equipped with the axial location structure in the perforation two sides and is located the perforation outside and the outline is greater than the perforation, two the steel rope connection assembly opposite one end is equipped with the second rope connection structure, two the steel rope connection assembly opposite one end is equipped with the third rope connection structure, two first steel wire rope, one end is connected with corresponding side's first rope connection structure, and the other end is connected with corresponding side's second rope connection structure, second steel wire rope, both ends are connected with corresponding side's third rope connection structure respectively, to connect left and right interval arrangement two steel rope connection assembly in series.

[0006] Further, the axial location structure includes a first rod head and a second rod head; the steel rope connection assembly includes a first butt joint rod and a second butt joint rod, one end of the first butt joint rod is inserted into the perforation and can rotate and move left and right in the perforation, the other end is located outside the perforation and is provided with the first rod head with a diameter larger than the perforation, and the second rope connection structure is connected to the outer end surface of the first rod head; one end of the second butt joint rod is inserted into the perforation and can rotate and move left and right in the perforation, the other end is located outside the perforation and is provided with the second rod head with a diameter larger than the perforation, the third rope connection structure is arranged on the outer end surface of the second rod head, and the inserted end of the second butt joint rod into the perforation is connected with the inserted end of the first butt joint rod into the perforation.

[0007] Further, the first rope connecting structure, the second rope connecting structure and the third rope connecting structure are all annular structures.

[0008] Further, the first steel wire rope is provided with a first rope hook at both ends to hook the first rope connecting structure and the second rope connecting structure.

[0009] Further, one end of the first butt rod inserted into the hole is provided with a first threaded hole, and one end of the second butt rod inserted into the hole is provided with a threaded column screw-connected with the first threaded hole.

[0010] Further, the ground anchoring assembly comprises a pre-buried plug-in part and a lifting adjusting part, the pre-buried plug-in part is used for being inserted into the ground, and the lifting adjusting part is connected with the pre-buried plug-in part and can be lifted and adjusted in position relative to the pre-buried plug-in part.

[0011] Further, the ground anchoring assembly further comprises a rotary movable part, the rotary movable part is installed on the lifting adjusting part and can be rotated and moved along the axis of the lifting adjusting part, and the first rope connecting structure is connected to the rotary movable part.

[0012] Further, the pre-buried plug-in part comprises a column, the bottom of the column is provided with a pointed head, the pointed head is pointed downward, the top edge of the pointed head is larger than the column, and the upper end edge of the column is provided with an outwardly horizontally extending limiting skirt.

[0013] Further, the upper end surface of the column is provided with a second threaded hole in the center, and the lifting adjusting part is screw-connected to the second threaded hole to realize lifting adjustment.

[0014] Further, the lifting adjusting part is provided with an embedded slot with an open bottom, the embedded slot is provided with an extension outlet at the top, and the extension outlet is smaller than the embedded slot; the rotary movable part comprises a rotary limiting head located in the embedded slot and capable of being rotated and moved in the embedded slot relative to the lifting adjusting part, the rotary limiting head is larger than the extension outlet, the rotary limiting head is provided with an extension column passing through the extension outlet at the upper end, and the first rope connecting structure is connected to the upper end of the extension column.

[0015] The utility model has the following beneficial effects:

[0016] The left and right ground anchoring assemblies are arranged in pairs, and cooperate with the first rope connecting structure to provide a stable anchoring foundation for the building. The bolt and the nut are arranged to connect and fix the first tension carrier and the second tension carrier, thereby enhancing the stability of the structure. The steel rope connecting assembly is movably arranged in the through hole of the bolt, and the axial limiting structure is arranged on both sides of the through hole, thereby ensuring the stability and reliability of the steel rope connecting assembly. The first steel wire rope and the second steel wire rope are arranged to effectively connect the ground anchoring assembly and the steel rope connecting assembly, thereby realizing the series connection of the left and right structures and enhancing the overall resistance of the building structure. The stability and bearing capacity of the building structure are improved, the deformation of the structure is effectively controlled, the service life of the building is prolonged, and a more reliable solution is provided in the field of building reinforcement that needs to withstand large wind force and other external forces.

[0017] In addition to the purposes, features and advantages described above, the utility model has other purposes, features and advantages. The utility model will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings constituting a part of this application are used to provide further understanding of the utility model, and the illustrative embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute improper limitation on the utility model. In the drawings:

[0019] Figure 1 It is the structural schematic diagram of the utility model embodiment;

[0020] Figure 2 It is the enlarged view of the bolt;

[0021] Figure 3 It is the connecting structure schematic diagram of the bolt and the steel rope connecting assembly;

[0022] Figure 4 It is the exploded state structural schematic diagram of Figure 3 ;

[0023] Figure 5 It is the exploded state structural schematic diagram of Figure 3 from another perspective;

[0024] Figure 6 It is the structural schematic diagram of the utility model embodiment in use;

[0025] Figure 7 It is the enlarged view of B of Figure 6 ;

[0026] Figure 8 It is the structural schematic diagram of the ground anchoring assembly.

[0027] LEGEND KEY:

[0028] Ground anchoring assembly 100, first tension carrier 101, second tension carrier 102, first rope connecting structure 110, pre-buried insert 120, stand column 121, pointed head 122, limiting skirt 123, second threaded hole 124, lifting adjusting piece 130, embedding slot 131, extension outlet 132, rotating movable piece 140, rotating limiting head 141, extension column 142;

[0029] Bolt 200, nut 210, through hole 220;

[0030] Steel rope connecting assembly 300, second rope connecting structure 310, third rope connecting structure 320, first butt joint rod 330, first rod head 331, first threaded hole 332, second butt joint rod 340, second rod head 341, threaded column 342;

[0031] First steel wire rope 400, first rope hook 410

[0032] Second steel wire rope 500, second rope hook 510. DETAILED DESCRIPTION

[0033] It should be understood that the specific embodiments described herein are merely exemplary and are not intended to limit the present application.

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0035] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications will also change accordingly.

[0036] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features with "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection required by the present application.

[0037] Please refer to Figure 1 and Figure 2 The utility model provides a building anchor cable structure in one preferred embodiment, including ground anchoring subassembly 100, bolt 200, steel rope connecting assembly 300, first wire rope 400, second wire rope 500.

[0038] Ground anchoring subassembly 100 is embedded in ground, and ground anchoring subassembly 100 is spaced apart left and right, and the first rope connecting structure 110 of ground anchoring subassembly 100 is equipped with the protruding ground upper end.

[0039] Bolt 200 is spaced apart left and right with two, and bolt 200 is located above ground anchoring subassembly 100 and is located between two ground anchoring subassembly 100, and the nut 210 of bolt 200 is connected to connect and fix first tension carrier 101 and second tension carrier 102. Figure 6 and Figure 7 As shown, first tension carrier 101 is vertical pole, and second tension carrier 102 is horizontal pole, and vertical pole and horizontal pole end are equipped with corresponding hole position to pass through bolt 200. Bolt 200 and nut 210 can connect and fix both ends of vertical pole and horizontal pole on both sides, so that both ends of vertical pole and horizontal pole on both sides are integrated, guarantee the stability and structural strength of structure. Bolt 200 center is equipped with perforation 220.

[0040] Steel rope connecting assembly 300 is spaced apart left and right with two, and two steel rope connecting assemblies 300 are movably arranged in the perforation 220 of two bolts 200, and the axial limiting structure of steel rope connecting assembly 300 is located outside the perforation 220 and the contour is greater than the perforation 220 on both sides of the perforation 220, so that when steel rope connecting assembly 300 is pulled left and right by first wire rope 400 and second wire rope 500, the force can be transmitted to first tension carrier 101, and the reinforcement in two directions of first tension carrier 101 is realized.

[0041] Two steel rope connecting assemblies 300 are equipped with second rope connecting structure 310 on the opposite end, and two steel rope connecting assemblies 300 are equipped with third rope connecting structure 320 on the opposite end. First wire rope 400 is equipped with two. One end of first wire rope 400 is connected with the first rope connecting structure 110 of the corresponding side, and the other end is connected with the second rope connecting structure 310 of the corresponding side, that is, one end of the first wire rope 400 on the left side is connected with the first rope connecting structure 110 on the left side, and the other end is connected with the second rope connecting structure 310 on the left side. One end of the first wire rope 400 on the right side is connected with the first rope connecting structure 110 on the right side, and the other end is connected with the second rope connecting structure 310 on the right side.

[0042] The second steel wire rope 500 is connected with the third rope connecting structure 320 on the corresponding side at both ends, so as to connect the two steel rope connecting assemblies 300 arranged at intervals in series. That is, the left and right ends of the second steel wire rope 500 are connected with the third rope connecting structure 320 on the steel rope connecting assembly 300 on the left and right sides.

[0043] In one preferred embodiment of the building anchor cable structure provided by the utility model, the ground anchoring assemblies 100 are arranged at intervals on the left and right sides, and cooperate with the first rope connecting structure 110 to provide a stable anchoring foundation for the building. The bolts 200 and the nuts 210 are arranged to connect and fix the first tension carrier 101 and the second tension carrier 102, thereby enhancing the stability of the structure. The steel rope connecting assembly 300 is movably arranged in the through hole 220 of the bolt 200, and an axial limiting structure is arranged on both sides of the through hole, thereby ensuring the stability and reliability of the steel rope connecting assembly. The arrangement of the first steel wire rope 400 and the second steel wire rope 500 effectively connects the ground anchoring assembly 100 and the steel rope connecting assembly 300, realizes the series connection of the structures on the left and right sides, and enhances the overall resistance of the building structure. The stability and bearing capacity of the building structure are improved, the deformation of the structure is effectively controlled, the service life of the building is prolonged, and a more reliable solution is provided in the field of building reinforcement that needs to withstand large wind forces and other external forces.

[0044] The second steel wire rope 500 connects the steel rope connecting assemblies 300 on both sides in series, so that the ground anchoring assemblies 100, the steel rope connecting assemblies 300 and the first steel wire rope 400 on the left and right sides are all connected in series, thereby improving the integrity of the steel rope reinforcement. Most of the forces borne by the building can be directly transmitted to the ground through the first steel wire rope 400 and the second steel wire rope 500; and the first steel wire rope 400 on the left side can act on the first tension carrier 101 on the right side, and the first steel wire rope 400 on the right side can act on the first tension carrier 101 on the left side, thereby improving the overall structure and the structural stability.

[0045] Reference Figures 2 to 5The axial limiting structure comprises a first rod head 331 and a second rod head 341; the steel rope connecting assembly 300 comprises a first butt joint rod 330 and a second butt joint rod 340, one end of the first butt joint rod 330 is inserted into the through hole 220 and can rotate and move left and right in the through hole 220, the other end is located outside the through hole 220 and is provided with the first rod head 331 with a diameter larger than that of the through hole 220, and the second rope connecting structure 310 is connected to the outer end surface of the first rod head 331. One end of the second butt joint rod 340 is inserted into the through hole 220 and can rotate and move left and right in the through hole 220, the other end is located outside the through hole 220 and is provided with the second rod head 341 with a diameter larger than that of the through hole 220, the third rope connecting structure 320 is arranged on the outer end surface of the second rod head 341, and the one end of the second butt joint rod 340 inserted into the through hole 220 is connected with the one end of the first butt joint rod 330 inserted into the through hole 220. After the first butt joint rod 330 is connected, the second butt joint rod 340 can still rotate in the through hole without clamping the bolt, and the second steel wire rope and the first steel wire rope can realize force transmission through the first butt joint rod and the second butt joint rod. The second butt joint rod is integrated with the first butt joint rod, and because the diameters of the first rod head and the second rod head are larger than that of the through hole, the left and right movements of the second butt joint rod and the first butt joint rod are limited and cannot be separated from the through hole. The first tensioning carrier 101 receives the force through the bolt and is finally transmitted to the ground anchoring assembly on the ground through the first steel wire rope and the second steel wire rope. And the first butt joint rod and the second butt joint rod are integrated into the center of the bolt, so that the structure is more compact, and there is no need to additionally open a hole on the first tensioning carrier 101. It can be understood that, in order to realize an effective force transmission path, the first rod head and the second rod head do not clamp the bolt, and in a normal state without external force, the first rod head and the second rod head do not generate direct force with the bolt.

[0046] In some embodiments of the present application, the first rope connecting structure 110, the second rope connecting structure 310 and the third rope connecting structure 320 are all annular structures, so as to facilitate the hooking of the first rope hook.

[0047] Referring to Figure 2 In some embodiments of the present application, the first steel wire rope 400 is provided with a first rope hook 410 at both ends, so as to hook the first rope connecting structure 110 and the second rope connecting structure 310. Similarly, the second steel wire rope 500 can be provided with a second rope hook 510 at both ends.

[0048] Referring to Figure 4 and Figure 5 In some embodiments of the present application, the one end of the first butt joint rod 330 inserted into the through hole 220 is provided with a first threaded hole 332, and the one end of the second butt joint rod 340 inserted into the through hole 220 is provided with a threaded column 342 threadedly connected with the first threaded hole 332, so as to realize the connection of the second butt joint rod 340 and the first butt joint rod 330.

[0049] With reference to Figure 8 In some embodiments of the present application, the ground anchoring assembly 100 comprises a pre-buried plug 120 and a lifting adjusting member 130, the pre-buried plug 120 is used for insertion into the ground, and the lifting adjusting member 130 is connected to the pre-buried plug 120 and can be lifted and adjusted in position relative to the pre-buried plug 120. Thus, the first steel wire rope 400 is tensioned by lifting and adjusting, and the pre-tensioning of the first steel wire rope 400 is achieved.

[0050] With reference to Figure 8 In some embodiments of the present application, the ground anchoring assembly 100 further comprises a rotating movable member 140, the rotating movable member 140 is installed on the lifting adjusting member 130 and can rotate along the axis of the lifting adjusting member 130, and the first rope connecting structure 110 is connected to the rotating movable member 140. The lifting and adjustment of the rope connecting structure can be achieved by screwing the lifting adjusting member, and since the rotating movable member 140 can rotate relative to the lifting adjusting member 130, when the lifting adjusting member 130 is screwed, the rotating movable member 140 can rotate relative to the lifting adjusting member 130, so that the rotating movable member 140 does not rotate with the lifting adjusting member 130, thereby avoiding the rotation of the rotating movable member 140 driving the first rope connecting structure 110 and the first steel wire rope 400 on the first rope connecting structure 110 to twist, causing resistance to the screwing of the lifting adjusting member 130 and avoiding damage to the first steel wire rope 400 due to excessive twisting.

[0051] With reference to Figure 8 In further embodiments of the present application, the pre-buried plug 120 comprises a column 121, the bottom of the column 121 is provided with a pointed head 122, the pointed head 122 is pointed downward, the top edge profile of the pointed head 122 is larger than that of the column 121, and the upper end edge of the column 121 is provided with a limiting skirt 123 extending outward horizontally. The top edge profile of the pointed head 122 is larger than that of the column 121, which facilitates insertion into the unhardened concrete during installation, and after the concrete hardens, since the top edge profile of the pointed head 122 is larger than that of the column 121, the column 121 will not be easily pulled out, achieving the effect of stable anchoring. The upper end edge of the column 121 is provided with a limiting skirt 123 extending outward horizontally, so that when inserted into the unhardened concrete, the limiting skirt 123 can be attached to the upper surface of the concrete, limiting the depth of insertion of the column 121.

[0052] With reference to Figure 8 In further embodiments of the present application, a second threaded hole 124 is provided at the center of the upper end face of the column 121, and the lifting adjusting member 130 is threadedly connected to the second threaded hole 124 to achieve lifting and adjustment.

[0053] With reference to Figure 8In further embodiments of the present application, the lifting adjusting member 130 is provided with an embedded slot 131 with an open bottom, and the embedded slot 131 is provided with an outlet 132 at the top, and the profile of the outlet 132 is smaller than that of the embedded slot 131; the rotary movable member 140 includes a rotary limiting head 141 located in the embedded slot 131 and capable of rotating relative to the lifting adjusting member 130 in the embedded slot 131, and the profile of the rotary limiting head 141 is larger than that of the outlet 132, so that the rotary limiting head 141 cannot be separated from the outlet 132, and the rotary limiting head 141 is limited in the embedded slot 131, achieving vertical limiting; the rotary limiting head 141 is provided with an extension column 142 passing through the outlet 132 at the upper end, and the first rope connecting structure 110 is connected to the upper end of the extension column 142, so as to conveniently expose the first rope connecting structure 110 to facilitate hooking of the first steel wire rope 400.

[0054] The above is only the preferred embodiments of the present application, and is not intended to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A building cable structure, characterized in that, The utility model relates to a ground anchoring assembly (100) is embedded in the ground, and the left and right interval is provided with the first rope connecting structure (110) of protruding ground on the upper end of ground anchoring assembly (100); The bolt (200) is provided with two left and right intervals, is located above ground anchoring assembly (100) and is located in the middle of two ground anchoring assemblies (100), and the nut (210) is connected on the bolt (200) to connect and fix the first tension carrier (101) and the second tension carrier (102);The center of the bolt (200) is provided with a through hole (220); The steel rope connecting assembly (300) is provided with two left and right intervals and is movably provided in the through hole (220) on the two bolts (200), and the steel rope connecting assembly (300) is provided with an axial limiting structure outside the through hole (220) and the contour is greater than the through hole (220) on both sides of the through hole (220), and the second rope connecting structure (310) is arranged on the opposite end of the two steel rope connecting assemblies (300), and the third rope connecting structure (320) is arranged on the opposite end of the two steel rope connecting assemblies (300); Two first steel wire ropes (400) are connected with the corresponding side first rope connecting structure (110) on one end and the corresponding side second rope connecting structure (310) on the other end; The second steel wire rope (500) is connected with the corresponding side third rope connecting structure (320) on both ends to connect the two steel rope connecting assemblies (300) arranged at left and right intervals in series. The axial limiting structure includes a first rod head (331) and a second rod head (341);The steel rope connecting assembly (300) includes a first butt joint rod (330) and a second butt joint rod (340), one end of the first butt joint rod (330) is inserted into the through hole (220) and can rotate and move left and right in the through hole (220), the other end is located outside the through hole (220) and is provided with the first rod head (331) with a diameter greater than the through hole (220), and the second rope connecting structure (310) is connected to the outer end surface of the first rod head (331);One end of the second butt joint rod (340) is inserted into the through hole (220) and can rotate and move left and right in the through hole (220), the other end is located outside the through hole (220) and is provided with the second rod head (341) with a diameter greater than the through hole (220), and the third rope connecting structure (320) is arranged on the outer end surface of the second rod head (341), and the one end of the second butt joint rod (340) inserted into the through hole (220) is connected with the one end of the first butt joint rod (330) inserted into the through hole (220).

2. The building cable structure according to claim 1, wherein The first rope connecting structure (110), the second rope connecting structure (310) and the third rope connecting structure (320) are all annular structures.

3. A building cable structure according to claim 2, characterised in that, The first steel wire rope (400) is provided with a first rope hook (410) at both ends to hook the first rope connecting structure (110) and the second rope connecting structure (310).

4. The building cable structure according to claim 3, wherein ​ 5. The building cable structure according to claim 3, wherein, The first butt joint rod (330) is provided with a first threaded hole (332) at one end inserted into the through hole (220), and the second butt joint rod (340) is provided with a threaded column (342) at one end inserted into the through hole (220) and threadedly connected with the first threaded hole (332).

6. The building cable structure of claim 1, wherein, The ground anchoring assembly (100) comprises a pre-buried plug-in part (120) for insertion into the ground and a lifting adjusting part (130) connected with the pre-buried plug-in part (120) and capable of lifting and adjusting the position relative to the pre-buried plug-in part (120).

7. A building cable structure according to claim 6, characterised in that The ground anchoring assembly (100) further comprises a rotary movable part (140) installed on the lifting adjusting part (130) and capable of rotating along the axis of the lifting adjusting part (130), and the first rope connecting structure (110) is connected to the rotary movable part (140).

8. A building cable structure according to claim 7, characterised in that, The pre-buried plug-in part (120) comprises a column (121) provided with a pointed head (122) at the bottom, the pointed head (122) being pointed downward, the top edge profile of the pointed head (122) being larger than that of the column (121), and the upper end edge of the column (121) being provided with an outwardly horizontally extending limiting skirt (123).

9. A building cable structure according to claim 8, characterised in that, The upper end surface of the column (121) is provided with a second threaded hole (124), and the lifting adjusting part (130) is threadedly connected to the second threaded hole (124) to realize lifting adjustment.

10. The building cable structure of claim 9, wherein, The lifting adjusting part (130) is provided with an embedded slot (131) with an open bottom, the embedded slot (131) being provided with an outlet (132) at the top, the profile of the outlet (132) being smaller than that of the embedded slot (131); the rotary movable part (140) comprises a rotary limiting head (141) located in the embedded slot (131) and capable of rotating relative to the lifting adjusting part (130) in the embedded slot (131), the profile of the rotary limiting head (141) being larger than that of the outlet (132); the rotary limiting head (141) is provided with an extension column (142) passing through the outlet (132) at the upper end, and the first rope connecting structure (110) is connected to the upper end of the extension column (142).

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