CA1091465A - Pole construction - Google Patents
Pole constructionInfo
- Publication number
- CA1091465A CA1091465A CA313,222A CA313222A CA1091465A CA 1091465 A CA1091465 A CA 1091465A CA 313222 A CA313222 A CA 313222A CA 1091465 A CA1091465 A CA 1091465A
- Authority
- CA
- Canada
- Prior art keywords
- members
- tube members
- tube
- overlapping
- pole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/02—Structures made of specified materials
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/02—Structures made of specified materials
- E04H12/12—Structures made of specified materials of concrete or other stone-like material, with or without internal or external reinforcements, e.g. with metal coverings, with permanent form elements
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Joining Of Building Structures In Genera (AREA)
- Flexible Shafts (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A pole construction having a generally telescoping configuration between its ends and the method of forming such a pole are disclosed. The pole is formed of longitudinally axially aligned cylindrical structural steel tubes. Each section of tube is of a uniform outer diameter and the respective sections progressively decrease in outer diameter. One end section of a larger tube overlaps the end section of the next smaller tube. An annular body of a non-metallic non-shrinking settable material such as concrete fills the space between the overlapping end sections of the tubes and rigidly secures the overlapping tubes to each other.
A pole construction having a generally telescoping configuration between its ends and the method of forming such a pole are disclosed. The pole is formed of longitudinally axially aligned cylindrical structural steel tubes. Each section of tube is of a uniform outer diameter and the respective sections progressively decrease in outer diameter. One end section of a larger tube overlaps the end section of the next smaller tube. An annular body of a non-metallic non-shrinking settable material such as concrete fills the space between the overlapping end sections of the tubes and rigidly secures the overlapping tubes to each other.
Description
-- 10~1~65 BACKGROUND OF THE INV~TION
This invention relates to pole type structural support members and particularly to a pole construction which may be used to support electrical transmission lines and related components either singly or by combining several to form a frame or lattice. Also, this invention relates to the method of forming such a pole construction. Pole structures commonly used for supporting transmission lines are either wood, pre-stressed concrete, or hollow tubular steel. Structural steel or aluminum are commonly used for constructing frames and lattices. As to poles, the hollow tapered steel construction has widespread use. Such poles are usually formed by bending steel sheets or plates on a press brake to form two half sections which would then be seam welded to produce sections of the pole. The various sections would then be butt welded to each other to form the tapered pole.
Another method of constructing tapered steel poles is to shape the indiv-idual sections such that a larger section would slip into the end of a smaller section and be pressed at the overlap to secure the sections to-gether to form the poleO
Regardless of which method is used to form tapered steel poles, each has the inherent problem of being expensive to produce mainly because of the complex costly equipment required for their production. The steel sheet or plate must be cut to shape~ pressed into rounded or near rounded shapes and then seam and butt welded as described above. Each stage of production requires its own particular piece of equipment with each oper-ation being time consuming and thus expensiveO In addition to the expense, obtaining good, strong butt welds is always a major problem. It is vital to obtain a welded joint having full tensile strength of the pole section.
q~
Because of the difficulty of obtaining high strength welds, high strength steel sheet or pla~e cannot always be used.
This invention overcomes the problems inherent in producing tapered poles by providing a pole construction formed of inexpensively produced straight tubular sections which are joined without welding to form a pole of progress-ively decreasing outer diameter. The pole of this invention has strong non-welded joints, resists both axial tension and compression loads as well bending moments imparted to the overall structure, and may be constructed without the need of high-priced complex equipment.
SUMMARY OF THE INVENTION
According to one aspect the invention is a pole construction compri$ing; a plurality of longitudinally aligned elongated structural tube members, each of said tube members being of generally uniform outer dimensions, all of said tube members having progressively decreasing outer dimensions with respect to each other, with one end section of a larger dimensioned tube member overlapping in spaced relationship to the end section of the next smaller dimensioned tube member;
an annular body of non-metallic, non-shrinking means filling the spaces between the overlapping end sections of said tube members and adhering to the opposing surfaces of the overlapping end sections for rigidly securing said overlapping tube members to each other;
said tube members and said annular body being constructed and arranged with respect to each other such that the joints formed between said tube members resist both axial tension and compression loads as well as bending moments imparted to the tube members; and said tube members having their respective interiors un-obstructed and without any structural filler material therein except within said space between said overlapping tube members.
This invention relates to pole type structural support members and particularly to a pole construction which may be used to support electrical transmission lines and related components either singly or by combining several to form a frame or lattice. Also, this invention relates to the method of forming such a pole construction. Pole structures commonly used for supporting transmission lines are either wood, pre-stressed concrete, or hollow tubular steel. Structural steel or aluminum are commonly used for constructing frames and lattices. As to poles, the hollow tapered steel construction has widespread use. Such poles are usually formed by bending steel sheets or plates on a press brake to form two half sections which would then be seam welded to produce sections of the pole. The various sections would then be butt welded to each other to form the tapered pole.
Another method of constructing tapered steel poles is to shape the indiv-idual sections such that a larger section would slip into the end of a smaller section and be pressed at the overlap to secure the sections to-gether to form the poleO
Regardless of which method is used to form tapered steel poles, each has the inherent problem of being expensive to produce mainly because of the complex costly equipment required for their production. The steel sheet or plate must be cut to shape~ pressed into rounded or near rounded shapes and then seam and butt welded as described above. Each stage of production requires its own particular piece of equipment with each oper-ation being time consuming and thus expensiveO In addition to the expense, obtaining good, strong butt welds is always a major problem. It is vital to obtain a welded joint having full tensile strength of the pole section.
q~
Because of the difficulty of obtaining high strength welds, high strength steel sheet or pla~e cannot always be used.
This invention overcomes the problems inherent in producing tapered poles by providing a pole construction formed of inexpensively produced straight tubular sections which are joined without welding to form a pole of progress-ively decreasing outer diameter. The pole of this invention has strong non-welded joints, resists both axial tension and compression loads as well bending moments imparted to the overall structure, and may be constructed without the need of high-priced complex equipment.
SUMMARY OF THE INVENTION
According to one aspect the invention is a pole construction compri$ing; a plurality of longitudinally aligned elongated structural tube members, each of said tube members being of generally uniform outer dimensions, all of said tube members having progressively decreasing outer dimensions with respect to each other, with one end section of a larger dimensioned tube member overlapping in spaced relationship to the end section of the next smaller dimensioned tube member;
an annular body of non-metallic, non-shrinking means filling the spaces between the overlapping end sections of said tube members and adhering to the opposing surfaces of the overlapping end sections for rigidly securing said overlapping tube members to each other;
said tube members and said annular body being constructed and arranged with respect to each other such that the joints formed between said tube members resist both axial tension and compression loads as well as bending moments imparted to the tube members; and said tube members having their respective interiors un-obstructed and without any structural filler material therein except within said space between said overlapping tube members.
- 2 -1()91~ t;5 According to a second aspect the invention is a method of making a pole construction having a telescoping shape, comprising the steps of;
longitudinally aligning elongated tubular members of different outer dimensions;
positioning the larger dimensioned tubular member such that one end section overlaps the end sections of the smaller dimensioned tubular member;
filling only a substantial portion of the space between the overlap-ping tubular members with non-metallic, non-shrinking material to rigidly secure the tubular members to each while maintaining the remaining interior spaces of the tubular members essentially free of any of said material; and said positioning and said filling being performed in a manner such that said tubular members are secured by a joint which resists both axial tension and compression loads as well as bending moments imparted to said tubular members.
A single unit of the pole construction, in its preferred form, includes a plurality of longitudinally aligned elongated structural tubes, each of the tubes being of a uniform outer dimension, all of the tubes having progressively tecreasing outer dimensions, with one end section of a larger dimension tube overlapping the end section of the next smaller dimensioned tube; and an annular body of non-metallic non-shrinking means, such as a body o concrete, filling the space and adhering to the opposing surfaces of the overlapping end sections between the overlapping end sections of the tubes for rigitly securing the overlapping tubes to each other. The tubes and annular body are constructed and arranged with respect to each other such that the joints formed between the tubes resist both axial tensinn and compression loads as well as bending moments imparted to the tubes. The tubes may be cylindri-cally shaped steel tubes longitudinally axially aligned. Also, the tubes have 109~65 their respective interiors unobstructed as ~egards any structural filler material such as would cause a detrimental shift of the neutral axis o the overall pole structure. Spacers may be prov~ded between the overlapping tubes to assure concentricity. In addition, shear connectors may be provided between the overlapping ~ub~s wi~hin ~he spac~ formed th~rebetween. The method of the present invention prc~rably comprises the steps of longitudinally aligning the structural tubular members; positioning the larger dimensioned tubular member such that one end section overlaps an end section of the smaller tubular menber; and filling the space between the overlapping ~ubular members with a non-metallic, non-shrinking material, such as concrete to secure the members to each other. The steps may be repeated to provide a pole of desired length.
Various advantages, details and modifications of the present invention will become apparent as the following description of a present preferred embodiment and present preferred method of making the embodiment proceet.
BRIEP DESCRIPTION OP THE DRAWINGS
Por the purposes of illustration but not of limitation an embodiment of the invention will be hereinafter described with reference to the accompanying drawings, in which: Figure 1 is an elevation view partly in section of a pole construction embodying the present invention, Figure 2 is an enlarged sectional view of a portion of the pole construction of Figure 1 showing tetails of construction of two of the tubular members at their oYer-lapping position; Figu~e 3 is a view looking along the line III-III of Figure 2; Figure 4 is a view looking along the line IV-IV of Pigure 2;
Figure 5 is a view looking along the line V-V of Figure 2; and Figure 6 is a view looking along the line VI-VI of Figure 2.
~' ~L0 9 1~l6 5 Re~e~ing now to the drawings, lo represents the pole construction of this invention which includes a plurality o elongated, cylindrical structural ~ube members, 12, ~4, and 16, all being lo~gitudinally axially aligned with each other. Three tube members 12, 14 and 16 are shown but two or more than three may be used to produce a pole cnnstruction of a desired le~gth. The pole construction 10 shown and describet herein could be o the type used in supporting electrical transmission lines and ~elated apparatus but it is to be understoot that the pole construction ;s not limited to that type of application. Also, several units of the pole con-struction 10 could be combined by suitably interconnecting them to f~rm ~-franes or other type frames snd lattices.
The tube members 12, 14 ant 16 are formed from a suitable metal such as steel, with each tube me~ber having a uniform outer dimension as measured rom its longitudinal axis or, in the case of the tube members described, a uniorm outer diameter. The outer diameters of the tube members 12, 14, 16 decrease progressively from the bottom tube member 12 to the top tube member 16. Thus, the pole construction 10 has a telescoping-type con-figuration. It is to be noted that a rame could be formed by combining several units o the pole construction 10 where the tube members increase progrèssively i~ oute~ diameter from the botton member to the top member.
Tube member 12 is securet to tube member 14 which in turn is secured to tube member 16. The securing means are the same between the respective tube members 12 and 14, 14 and 16, with Figures 2-5 illustrating the securing means for tube members 12 and 14.
As shown in Figure 2, the upper eDd section of tube member 12 con-centrically overlaps a lower ent section of tube member 14. The longitudinal length o the overlap between the tube members 12 and 14 would vary depending : ~ _ 5 _ 1~914~;S
on the size of the respeGtive tube members with the overlap length in all cases being long enough to provide a strong connection between the tube members as will be ~ore fully elaborated upon hcr~after. When making the pole construc-tion 10, a r;ng 18 of pla~ic materLal would be force fltted on the lo~er end of the tube member 14, the rlng serving as a dam for stopp~ng settable material, as will be described more ully hereinafter. Also, generally S-shaped metal spacer elements 20 are secured about the outer periphery of the lower end section of tube member 14. In atdition, stut-type shear connectors 22 are securet by any suitable meth4t about the outer periphery of the tube member 14, above the spacer elements 20. With the ring-dam 18, spacer elements 20, and shear connectors 22 in place, the tube members 12 and 14 are positioned in the overlapping relationship shown in Figure 2. The spacer elements 20 will insure the longitudinal axial alignment between the tube members 12 and 14. The ring~
tam 18 will close the lower end of the annular space 24 defined between the overlappang end sections o the tube members 12 and 14. Shear connectors 26 are also provided about the inner periphery of the tube membcr 12.
With the tube members 12 and 14 in the overlap position as described in ~he preceding paragraph, a frusto-conical dam 30, shown in phantom outline in Pigure 2, is arranged on the upper end of tube member 14. A non-metallic non-shrinking settable material is then poured through an opening provided in tam 30 into the space 24 until that space and the space beneath dam 30 is filled. The settable material may be a non-shrLnking concrete, mortar, grout, a suitable plastic, or the like. Thus an annular boty 32 of settable material is formed within space 24 to secure the tube members 12 and 14 to each other. The shear connectors 22 and 26 will provide attitional strength to the connection between the tube members.
After the material has set to form boty 32, the dam 30 is removet.
j; , - ~ - 6 -" ~ . .
~o9~s The sloped upper end of body 32 will assuro water runoff.
As indicated earlier, the longatudinal length of the annular space 24 which is the o~erlap of the tube members 12 and 1~ should be long enough to provide a strong connection between the tube members. A strong connection would be one which resistsboth axial tension and compression loads as well as benting moments imparted to the overall pole construction 10 such as, for example, would typically exast on a pole supporting electrical transmission lines and related apparatus. As an illustration o these characteristics, benting test and gtrength tests we~e conducted on a pole construction formed of six foot long sections of ten and fourteen inch diameter pipes having a twenty inch overlap. The oVerlap annulus was filled with a pre-packaged patching concrete mixture. The test results showed that the ull bending strength of the smaller diameter tube was realized and that the joint formed between the ov0rlapping tubes members withstood large axial loads in tension and compression. The test results were achieved with the joint being provided with and without shear connectors 22 and 26.
The interiors of tke tube members 12 and 14 are generally unob-`
structed. As used in this invention "generally unobstructet" means that there is no filler material or other structural members within the tube members 12 and 14 which would have the detrimental effect of shifting the neutral axis o tke pole construction 10. Such a shift of neutral axis would happen if the tube members 12 and 14 were fllled with a structural material such as concrete, rigit foam, or the like. The expression "generally unobstructet"
as uset herein would allow for ~on-structural filler material such as a lightweight foam material which might be uset for pre~enti~g rust ant other type corrosion, or strengthening members for localized support.
With the tube members joinet in the manner tescribed, a pole con-struction 10 results without any butt welding. Thus the problem inherent _ 7 _ V~465 with butt weld-type construction of poles is completely eliminated. Accord-ingly, it should now be clearly understood how this invention provides the advantages in pole cons~ruction as des~ribed in the introduction portion of this specification. It should also be clear that this invention provides a pole construction which has a telescoping form in which the joints between the tube members are free of any mechanical supports such as ledges, transverse pins or the like but rather are simply formed of a non-metallic, non-shrinking material. In that simple, inexpensively ormed constru~tion thi~ invention realizes a pole which resists both large axial tension and compression loads as well as bending moments imparted to the overall pole construction. Since the pole of this invention resists vertical tension or uplifting forces it is particularly suited for use in construction H-frame type electrical transmission support structures which are subject to uplifting vertical orces.
Various other waxs within the scope of the method of the present invention are contemplated for forming the pole construction 10. One such other way would be to securo non-structural rings to the tubes members at their respective ents. The smaller tube member would be inserted within the larger tube member and po~itioned with respect thereto such that the joint 1 20 annulus is provided. Suitable joint material could then be directed into the joint annulus through an opening provited ln the wall of the larger tube member.
While we have shown and described a present preferred embodiment of this Lnvention and havo also described a present preferred method of forming the embodiment, it is to be distinctly understood that the invention is not limited thereto, but m~y be otherwi~e variously embodied and formed within the s~ope of the following claims.
,:
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longitudinally aligning elongated tubular members of different outer dimensions;
positioning the larger dimensioned tubular member such that one end section overlaps the end sections of the smaller dimensioned tubular member;
filling only a substantial portion of the space between the overlap-ping tubular members with non-metallic, non-shrinking material to rigidly secure the tubular members to each while maintaining the remaining interior spaces of the tubular members essentially free of any of said material; and said positioning and said filling being performed in a manner such that said tubular members are secured by a joint which resists both axial tension and compression loads as well as bending moments imparted to said tubular members.
A single unit of the pole construction, in its preferred form, includes a plurality of longitudinally aligned elongated structural tubes, each of the tubes being of a uniform outer dimension, all of the tubes having progressively tecreasing outer dimensions, with one end section of a larger dimension tube overlapping the end section of the next smaller dimensioned tube; and an annular body of non-metallic non-shrinking means, such as a body o concrete, filling the space and adhering to the opposing surfaces of the overlapping end sections between the overlapping end sections of the tubes for rigitly securing the overlapping tubes to each other. The tubes and annular body are constructed and arranged with respect to each other such that the joints formed between the tubes resist both axial tensinn and compression loads as well as bending moments imparted to the tubes. The tubes may be cylindri-cally shaped steel tubes longitudinally axially aligned. Also, the tubes have 109~65 their respective interiors unobstructed as ~egards any structural filler material such as would cause a detrimental shift of the neutral axis o the overall pole structure. Spacers may be prov~ded between the overlapping tubes to assure concentricity. In addition, shear connectors may be provided between the overlapping ~ub~s wi~hin ~he spac~ formed th~rebetween. The method of the present invention prc~rably comprises the steps of longitudinally aligning the structural tubular members; positioning the larger dimensioned tubular member such that one end section overlaps an end section of the smaller tubular menber; and filling the space between the overlapping ~ubular members with a non-metallic, non-shrinking material, such as concrete to secure the members to each other. The steps may be repeated to provide a pole of desired length.
Various advantages, details and modifications of the present invention will become apparent as the following description of a present preferred embodiment and present preferred method of making the embodiment proceet.
BRIEP DESCRIPTION OP THE DRAWINGS
Por the purposes of illustration but not of limitation an embodiment of the invention will be hereinafter described with reference to the accompanying drawings, in which: Figure 1 is an elevation view partly in section of a pole construction embodying the present invention, Figure 2 is an enlarged sectional view of a portion of the pole construction of Figure 1 showing tetails of construction of two of the tubular members at their oYer-lapping position; Figu~e 3 is a view looking along the line III-III of Figure 2; Figure 4 is a view looking along the line IV-IV of Pigure 2;
Figure 5 is a view looking along the line V-V of Figure 2; and Figure 6 is a view looking along the line VI-VI of Figure 2.
~' ~L0 9 1~l6 5 Re~e~ing now to the drawings, lo represents the pole construction of this invention which includes a plurality o elongated, cylindrical structural ~ube members, 12, ~4, and 16, all being lo~gitudinally axially aligned with each other. Three tube members 12, 14 and 16 are shown but two or more than three may be used to produce a pole cnnstruction of a desired le~gth. The pole construction 10 shown and describet herein could be o the type used in supporting electrical transmission lines and ~elated apparatus but it is to be understoot that the pole construction ;s not limited to that type of application. Also, several units of the pole con-struction 10 could be combined by suitably interconnecting them to f~rm ~-franes or other type frames snd lattices.
The tube members 12, 14 ant 16 are formed from a suitable metal such as steel, with each tube me~ber having a uniform outer dimension as measured rom its longitudinal axis or, in the case of the tube members described, a uniorm outer diameter. The outer diameters of the tube members 12, 14, 16 decrease progressively from the bottom tube member 12 to the top tube member 16. Thus, the pole construction 10 has a telescoping-type con-figuration. It is to be noted that a rame could be formed by combining several units o the pole construction 10 where the tube members increase progrèssively i~ oute~ diameter from the botton member to the top member.
Tube member 12 is securet to tube member 14 which in turn is secured to tube member 16. The securing means are the same between the respective tube members 12 and 14, 14 and 16, with Figures 2-5 illustrating the securing means for tube members 12 and 14.
As shown in Figure 2, the upper eDd section of tube member 12 con-centrically overlaps a lower ent section of tube member 14. The longitudinal length o the overlap between the tube members 12 and 14 would vary depending : ~ _ 5 _ 1~914~;S
on the size of the respeGtive tube members with the overlap length in all cases being long enough to provide a strong connection between the tube members as will be ~ore fully elaborated upon hcr~after. When making the pole construc-tion 10, a r;ng 18 of pla~ic materLal would be force fltted on the lo~er end of the tube member 14, the rlng serving as a dam for stopp~ng settable material, as will be described more ully hereinafter. Also, generally S-shaped metal spacer elements 20 are secured about the outer periphery of the lower end section of tube member 14. In atdition, stut-type shear connectors 22 are securet by any suitable meth4t about the outer periphery of the tube member 14, above the spacer elements 20. With the ring-dam 18, spacer elements 20, and shear connectors 22 in place, the tube members 12 and 14 are positioned in the overlapping relationship shown in Figure 2. The spacer elements 20 will insure the longitudinal axial alignment between the tube members 12 and 14. The ring~
tam 18 will close the lower end of the annular space 24 defined between the overlappang end sections o the tube members 12 and 14. Shear connectors 26 are also provided about the inner periphery of the tube membcr 12.
With the tube members 12 and 14 in the overlap position as described in ~he preceding paragraph, a frusto-conical dam 30, shown in phantom outline in Pigure 2, is arranged on the upper end of tube member 14. A non-metallic non-shrinking settable material is then poured through an opening provided in tam 30 into the space 24 until that space and the space beneath dam 30 is filled. The settable material may be a non-shrLnking concrete, mortar, grout, a suitable plastic, or the like. Thus an annular boty 32 of settable material is formed within space 24 to secure the tube members 12 and 14 to each other. The shear connectors 22 and 26 will provide attitional strength to the connection between the tube members.
After the material has set to form boty 32, the dam 30 is removet.
j; , - ~ - 6 -" ~ . .
~o9~s The sloped upper end of body 32 will assuro water runoff.
As indicated earlier, the longatudinal length of the annular space 24 which is the o~erlap of the tube members 12 and 1~ should be long enough to provide a strong connection between the tube members. A strong connection would be one which resistsboth axial tension and compression loads as well as benting moments imparted to the overall pole construction 10 such as, for example, would typically exast on a pole supporting electrical transmission lines and related apparatus. As an illustration o these characteristics, benting test and gtrength tests we~e conducted on a pole construction formed of six foot long sections of ten and fourteen inch diameter pipes having a twenty inch overlap. The oVerlap annulus was filled with a pre-packaged patching concrete mixture. The test results showed that the ull bending strength of the smaller diameter tube was realized and that the joint formed between the ov0rlapping tubes members withstood large axial loads in tension and compression. The test results were achieved with the joint being provided with and without shear connectors 22 and 26.
The interiors of tke tube members 12 and 14 are generally unob-`
structed. As used in this invention "generally unobstructet" means that there is no filler material or other structural members within the tube members 12 and 14 which would have the detrimental effect of shifting the neutral axis o tke pole construction 10. Such a shift of neutral axis would happen if the tube members 12 and 14 were fllled with a structural material such as concrete, rigit foam, or the like. The expression "generally unobstructet"
as uset herein would allow for ~on-structural filler material such as a lightweight foam material which might be uset for pre~enti~g rust ant other type corrosion, or strengthening members for localized support.
With the tube members joinet in the manner tescribed, a pole con-struction 10 results without any butt welding. Thus the problem inherent _ 7 _ V~465 with butt weld-type construction of poles is completely eliminated. Accord-ingly, it should now be clearly understood how this invention provides the advantages in pole cons~ruction as des~ribed in the introduction portion of this specification. It should also be clear that this invention provides a pole construction which has a telescoping form in which the joints between the tube members are free of any mechanical supports such as ledges, transverse pins or the like but rather are simply formed of a non-metallic, non-shrinking material. In that simple, inexpensively ormed constru~tion thi~ invention realizes a pole which resists both large axial tension and compression loads as well as bending moments imparted to the overall pole construction. Since the pole of this invention resists vertical tension or uplifting forces it is particularly suited for use in construction H-frame type electrical transmission support structures which are subject to uplifting vertical orces.
Various other waxs within the scope of the method of the present invention are contemplated for forming the pole construction 10. One such other way would be to securo non-structural rings to the tubes members at their respective ents. The smaller tube member would be inserted within the larger tube member and po~itioned with respect thereto such that the joint 1 20 annulus is provided. Suitable joint material could then be directed into the joint annulus through an opening provited ln the wall of the larger tube member.
While we have shown and described a present preferred embodiment of this Lnvention and havo also described a present preferred method of forming the embodiment, it is to be distinctly understood that the invention is not limited thereto, but m~y be otherwi~e variously embodied and formed within the s~ope of the following claims.
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Claims (7)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A pole construction comprising; a plurality of longitudinally aligned elongated structural tube members, each of said tube members being of generally uniform outer dimensions, all of said tube members having progressively decreasing outer dimensions with respect to each other, with one end section of a larger dimensioned tube member overlapping in spaced relationship to the end section of the next smaller dimensioned tube member;
an annular body of non-metallic, non-shrinking means filling the spaces between the overlapping end sections of said tube members and adher-ing to the opposing surfaces of the overlapping end sections for rigidly securing said overlapping tube members to each other;
said tube members and said annular body being constructed and arranged with respect to each other such that the joints formed between said tube members resist both axial tension and compression loads as well as bend-ing moments imparted to the tube members; and said tube members having their respective interiors un-obstructed and without any structural filler material therein except within said space between said overlapping tube members.
an annular body of non-metallic, non-shrinking means filling the spaces between the overlapping end sections of said tube members and adher-ing to the opposing surfaces of the overlapping end sections for rigidly securing said overlapping tube members to each other;
said tube members and said annular body being constructed and arranged with respect to each other such that the joints formed between said tube members resist both axial tension and compression loads as well as bend-ing moments imparted to the tube members; and said tube members having their respective interiors un-obstructed and without any structural filler material therein except within said space between said overlapping tube members.
2. A pole construction as set forth in Claim 1 wherein said tube members are cylindrically shaped.
3. A pole construction as set forth in Claim 1 wherein said tube members are axially aligned and said overlapping tube members are concentric with each other.
4. A pole construction as set forth in Claim 1 wherein said tube members are made of a metallic material.
5. A pole construction as set forth in Claim 1 including spacer means within the annular space between said overlapping tube members for positioning the tube members with respect to each other.
6. A pole construction as set forth in Claim 1 including shear connection means disposed within the space between said overlapping tube members.
7. A method of making a pole construction having a telescoping shape, comprising the steps of;
longitudinally aligning elongated tubular members of different outer dimensions;
positioning the larger dimensioned tubular member such that one end section overlaps the end sections of the smaller dimensioned tubular member;
filling only a substantial portion of the space between the overlapping tubular members with non-metallic, non-shrinking material to rigidly secure the tubular members to each while maintaining the remaining interior spaces of the tubular members essentially free of any of said material; and said positioning and said filling being performed in a manner such that said tubular members are secured by a joint which resists both axial tension and compression loads as well as bending moments imparted to said tubular members.
longitudinally aligning elongated tubular members of different outer dimensions;
positioning the larger dimensioned tubular member such that one end section overlaps the end sections of the smaller dimensioned tubular member;
filling only a substantial portion of the space between the overlapping tubular members with non-metallic, non-shrinking material to rigidly secure the tubular members to each while maintaining the remaining interior spaces of the tubular members essentially free of any of said material; and said positioning and said filling being performed in a manner such that said tubular members are secured by a joint which resists both axial tension and compression loads as well as bending moments imparted to said tubular members.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US84174077A | 1977-10-13 | 1977-10-13 | |
| US841,740 | 1977-10-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1091465A true CA1091465A (en) | 1980-12-16 |
Family
ID=25285585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA313,222A Expired CA1091465A (en) | 1977-10-13 | 1978-10-12 | Pole construction |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS5490841A (en) |
| AU (1) | AU4066278A (en) |
| CA (1) | CA1091465A (en) |
| DE (1) | DE2844544A1 (en) |
| FR (1) | FR2406051A1 (en) |
| GB (1) | GB2007740B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3302075C2 (en) * | 1983-01-22 | 1985-05-09 | Rudolf Dipl.-Ing. 7000 Stuttgart Bergermann | Connection for prestressed concrete or reinforced concrete bending beams |
| DE19703856A1 (en) * | 1997-02-03 | 1998-08-06 | Estebanez Eva Garcia | Joint filling method for forming steel joints in heavy machines, e.g. cranes |
| DE29710432U1 (en) * | 1997-06-16 | 1997-08-07 | Anger, Bernd, Dipl.-Ing., 31188 Holle | Multi-shot steel tube mast |
| IT244690Y1 (en) * | 1998-12-11 | 2002-03-12 | Mauro Orlandi | A POLE SUITABLE TO SUPPORT AERIAL ELECTRIC OR TELEPHONE LINES, LIGHTING EQUIPMENT OR OTHER |
-
1978
- 1978-10-12 CA CA313,222A patent/CA1091465A/en not_active Expired
- 1978-10-12 AU AU40662/78A patent/AU4066278A/en active Pending
- 1978-10-12 FR FR7829187A patent/FR2406051A1/en not_active Withdrawn
- 1978-10-12 DE DE19782844544 patent/DE2844544A1/en not_active Withdrawn
- 1978-10-13 GB GB7840476A patent/GB2007740B/en not_active Expired
- 1978-10-13 JP JP12522078A patent/JPS5490841A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| AU4066278A (en) | 1980-04-17 |
| DE2844544A1 (en) | 1979-04-19 |
| FR2406051A1 (en) | 1979-05-11 |
| GB2007740B (en) | 1982-05-06 |
| JPS5490841A (en) | 1979-07-18 |
| GB2007740A (en) | 1979-05-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |