CA2515758A1 - Welded taper tie - Google Patents
Welded taper tie Download PDFInfo
- Publication number
- CA2515758A1 CA2515758A1 CA 2515758 CA2515758A CA2515758A1 CA 2515758 A1 CA2515758 A1 CA 2515758A1 CA 2515758 CA2515758 CA 2515758 CA 2515758 A CA2515758 A CA 2515758A CA 2515758 A1 CA2515758 A1 CA 2515758A1
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- CA
- Canada
- Prior art keywords
- bar
- tie
- taper
- taper tie
- concrete
- 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.)
- Abandoned
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Abstract
A concrete taper tie is provided for holding concrete wall forms in position while a concrete wall is being poured. The concrete taper tie includes an intermediate tapered bar and first and second threaded end bars extending from opposing ends of the intermediate tapered bar. Each threaded end bar includes a pair of parallel flat surfaces formed substantially along the entire length of the threads for permitting a gripping tool or the like to grasp the concrete taper tie to facilitate removal from a finished concrete wall. The threaded end bars are mechanically attached via welding or the like, and may be removed and replaced when a portion becomes damaged.
Description
WELDED TAPER TIE
Field of the Invention [0001] The present disclosure relates generally to a taper tie used for forming concrete walls and, more particularly, to a taper tie having welded end rods.
Background [0002] Concrete walls are formed by pouring liquid concrete into forms.
These forms have side walls that are typically made of wood, metal, or plastic. The pressure of the liquid concrete can force the side walls of the forms apart if the walls are not reinforced. Typically, this reinforcement includes a tie. Ties that have a tapered portion can be used because they are easier to remove than straight cylindrical ties after the concrete has hardened around them.
Field of the Invention [0001] The present disclosure relates generally to a taper tie used for forming concrete walls and, more particularly, to a taper tie having welded end rods.
Background [0002] Concrete walls are formed by pouring liquid concrete into forms.
These forms have side walls that are typically made of wood, metal, or plastic. The pressure of the liquid concrete can force the side walls of the forms apart if the walls are not reinforced. Typically, this reinforcement includes a tie. Ties that have a tapered portion can be used because they are easier to remove than straight cylindrical ties after the concrete has hardened around them.
(0003] One problem sometimes associated with concrete taper ties is that over time the threaded end rods are bent or the threads on the end rods become marred.
Sometimes the end rods are bent beyond a predetermined amount, and the ties must be discarded. Other times, the threads are damaged to the point of being useless. It would be advantageous to devise a taper tie that may have a longer useful life.
Summary [0004] In accordance with one aspect of the invention, a concrete taper tie includes an intermediate tapered bar and first and second threaded end bars extending from opposing ends of the intermediate tapered bar. Each threaded end bar includes at least one flat surface formed substantially along the entire length thereof.
Sometimes the end rods are bent beyond a predetermined amount, and the ties must be discarded. Other times, the threads are damaged to the point of being useless. It would be advantageous to devise a taper tie that may have a longer useful life.
Summary [0004] In accordance with one aspect of the invention, a concrete taper tie includes an intermediate tapered bar and first and second threaded end bars extending from opposing ends of the intermediate tapered bar. Each threaded end bar includes at least one flat surface formed substantially along the entire length thereof.
[0005] In accordance with another aspect of the invention, a concrete taper tie includes an intermediate tapered portion including a first end having a first diameter and a second end having a second diameter, wherein the second diameter is smaller than the first diameter. First and second end portions can be attached to the first and second ends, respectively, of the intermediate tapered portion. Each end portion of the concrete taper tie can include threaded grooves adapted to receive a threaded fastener. A pair of flat surfaces extending substantially the entire length of the threaded grooves and positioned parallel to each other can be formed on the threaded end portion. The first and second end portions can be attached to the intermediate portion by welding or the like.
[0006] In accordance with another aspect of the invention, a method is provided for refurbishing a concrete taper tie having a tapered intermediate bar with a pair of threaded end bars extending therefrom. The refurbishment includes removing a defective end bar via a cutter, a grinder, a torch, or the like and welding a new end bar to the tapered intermediate bar.
[0007] In accordance with another aspect of the invention, a method is provided for forming a concrete wall. A pair of substantially parallel panels is positioned in a desired locationand a welded taper tie is inserted between the panels at predetermined locations. Each welded taper tie includes a pair of threaded ends having at least two flat surfaces extending through a length of thread. A
threaded nut is attached to each end of the taper tie to clamp against the panels. Concrete is then poured between the panels. After the concrete wall hardens, each welded taper tie is removed and the panels are free to be pulled away from the concrete wall.
Removing the welded taper tie. from the finished hardened concrete wall can include gripping the flat surfaces formed on the threaded end bar with a gripping tool and rotating the welded taper tie to break the taper tie loose from the concrete wall. The welded taper tie can then be pulled from the concrete wall.
threaded nut is attached to each end of the taper tie to clamp against the panels. Concrete is then poured between the panels. After the concrete wall hardens, each welded taper tie is removed and the panels are free to be pulled away from the concrete wall.
Removing the welded taper tie. from the finished hardened concrete wall can include gripping the flat surfaces formed on the threaded end bar with a gripping tool and rotating the welded taper tie to break the taper tie loose from the concrete wall. The welded taper tie can then be pulled from the concrete wall.
[0008] Other applications of the present invention will become apparent to those skilled in the art when the following description of the best mode contemplated for practicing the invention is read in conjunction with the accompanying drawings.
Detailed Description of the Drawings [0009) Fig. 1 is a perspective view of a welded taper tie;
Detailed Description of the Drawings [0009) Fig. 1 is a perspective view of a welded taper tie;
[0010) Fig. 2 is a side view of the welded taper tie of Fig. 1;
[OOI1] Fig. 3 is a right-end view of the welded taper tie of Fig. 1;
[0012] Fig. 4 is a partial view of a threaded end bar prior to being attached to an intermediate tapered bar;
[0013) Fig. 5 is a view showing the threaded end bar and the tapered intermediate bar of Fig. 4 being welded together;
[0014] Fig. 6 is a concrete wall form assembly having a pair of side wall forms and a welded taper tie extending therethrough; and [0015] Fig. 7 is an enlarged view of a portion of a threaded end bar with a gripping tool engaging the flats of the threaded end bar.
Detailed Description of the Invention [0016] In accordance with one aspect of the invention, a concrete taper tie 10 includes an intermediate tapered bar 12 with first and second threaded end bars 18, 20 extending from opposing ends 14, 16 of the intermediate tapered bar 12. Each threaded end bar 18, 20 includes at least one flat surface 26a, 26b formed substantially along the entire length of the threaded end bars 18, 20.
[0017] Refernng now to Figs. 1-3, a concrete taper tie is generally referred to by the reference numeral 10. The concrete taper tie 10 includes an intermediate tapered bar 12. The intermediate tapered bar I2 can be formed from a steel bar such as a cold weld steel SAE 4140, SAE 1144, or the like. The intermediate tapered bar 12 includes a first end 14 and a second end 16 having a larger diameter than the first end 14. A first threaded end bar 18 extends from the first end 14 of the tapered bar 12. A second threaded end bar 20 extends from the second end 16 of the intermediate tapered bar 12. The first and second threaded end bars 18, 20 are preferably made from harder material than the intermediate tapered bar 12. Threads 22 are formed on each threaded end bar 18, 20 to receive a threaded fastener such as a nut 24 on the threaded end bars 18, 20. Each threaded end bar 18, 20 includes a pair of flat surfaces 26a, 26b formed through the threads 22 substantially along the entire length of the first and second threaded end bars 18, 20. The end bars can be formed from DYWIDAG threadbar which is a trademark of Dwidag Systems International. The flat surfaces 26a, 26b can be formed from approximately 5 percent to 80 percent of the diameter of the end bars 18, 20.
[0018] Referring now to Figs. 4 and 5, each threaded end bar 18, 20 can be mechanically attached to the intermediate tapered bar 12 via welding or the like. One suitable method is to use a friction welding process. Fig. 5 shows a weld 28 being performed by a weld rod 30. While welding is one preferred method for joining the threaded end bars 18, 20 to the intermediate tapered bar 12, other forms of mechanically fastening such as brazing, gluing, threading, bolting, and the like are also contemplated by the present disclosure. Welding can be performed by any of several methods such as, but not limited to, MIG, TIG, GTAW, and inertia welding.
In accordance with the disclosed example, it may be advisable to apply post heat treatment to the weld at between about 1125 to about 1250 Deg. F. This heat treatment will provide stress relief and an annealing affect to the welded joints.
[0019] Referring now to Fig. 6, a concrete wall assembly is generally referred to by the reference numeral 40. The concrete wall assembly 40 includes a pair of wall forms 42a, 42b for defining the sides of the poured concrete wall 44. A
plurality of concrete taper ties 10 can be positioned between the wall forms 42a and 42b for holding the wall forms 42a, 42b at a desired spacing. The nut or nuts 24 can be tightened on the threaded end bars 18, 20 to securely hold the wall forms 42a, 42b in position when the concrete wall 44 is poured between the wall forms 42a, 42b.
After the concrete wall has hardened, the nuts 24 can be removed. The flats 26a, 26b, help ensure the threads 22 of the end bars 18, 20 are self cleaning. Foreign substances such as dirt or concrete are more easily removed from the threads 22 because of the discontinuity formed in the threads 22 by the flats 26a, 26b. The concrete taper tie 10 can then be removed by grasping one or both end bars 18, 20 and pulling the taper tie from the concrete wall 44.
[0020] Refernng now to Fig. 7, a cross-sectional view of an end bar 20 is shown with a gripping tool 32 grasping the flats 26a, 26b of the threaded end bar 20.
The gripping tool can include a pair of jaws 34a, 34b that are operable for grasping the flat surfaces 26a, 26b, such that the end bars can be gripped without marnng the threads 22 of the threaded end bar 20. The gripping tool 32 can be used, for example, to twist and pull the concrete taper tie 10 to facilitate removal of the concrete taper tie 10 from the finished concrete wall 44.
[0021] The threaded end bars 18, 20 can be repaired if they become damaged from use. The threaded bars 18, 20 can be removed from the tapered bar 12 by cutting, grinding, or torching and the like, if the end bars 18, 20 become bent or the threads 22 become damaged. The concrete taper tie 10 can be refurbished by attaching a new threaded end bar 18, 20 in a similar manner as generally described above.
[0022] While the preceding text sets forth a detailed description of numerous different embodiments of the invention, it should be understood that the legal scope of the invention is defined by the words of the claims set forth at the end of this patent.
The detailed description is to be construed as exemplary only and does not describe every possible embodiment of the invention since describing every possible embodiment would be impractical, if not impossible. Numerous alternative embodiments could be implemented, using either current technology or technology developed after the filing date of this patent, which would still fall within the scope of the claims defining the invention.
[OOI1] Fig. 3 is a right-end view of the welded taper tie of Fig. 1;
[0012] Fig. 4 is a partial view of a threaded end bar prior to being attached to an intermediate tapered bar;
[0013) Fig. 5 is a view showing the threaded end bar and the tapered intermediate bar of Fig. 4 being welded together;
[0014] Fig. 6 is a concrete wall form assembly having a pair of side wall forms and a welded taper tie extending therethrough; and [0015] Fig. 7 is an enlarged view of a portion of a threaded end bar with a gripping tool engaging the flats of the threaded end bar.
Detailed Description of the Invention [0016] In accordance with one aspect of the invention, a concrete taper tie 10 includes an intermediate tapered bar 12 with first and second threaded end bars 18, 20 extending from opposing ends 14, 16 of the intermediate tapered bar 12. Each threaded end bar 18, 20 includes at least one flat surface 26a, 26b formed substantially along the entire length of the threaded end bars 18, 20.
[0017] Refernng now to Figs. 1-3, a concrete taper tie is generally referred to by the reference numeral 10. The concrete taper tie 10 includes an intermediate tapered bar 12. The intermediate tapered bar I2 can be formed from a steel bar such as a cold weld steel SAE 4140, SAE 1144, or the like. The intermediate tapered bar 12 includes a first end 14 and a second end 16 having a larger diameter than the first end 14. A first threaded end bar 18 extends from the first end 14 of the tapered bar 12. A second threaded end bar 20 extends from the second end 16 of the intermediate tapered bar 12. The first and second threaded end bars 18, 20 are preferably made from harder material than the intermediate tapered bar 12. Threads 22 are formed on each threaded end bar 18, 20 to receive a threaded fastener such as a nut 24 on the threaded end bars 18, 20. Each threaded end bar 18, 20 includes a pair of flat surfaces 26a, 26b formed through the threads 22 substantially along the entire length of the first and second threaded end bars 18, 20. The end bars can be formed from DYWIDAG threadbar which is a trademark of Dwidag Systems International. The flat surfaces 26a, 26b can be formed from approximately 5 percent to 80 percent of the diameter of the end bars 18, 20.
[0018] Referring now to Figs. 4 and 5, each threaded end bar 18, 20 can be mechanically attached to the intermediate tapered bar 12 via welding or the like. One suitable method is to use a friction welding process. Fig. 5 shows a weld 28 being performed by a weld rod 30. While welding is one preferred method for joining the threaded end bars 18, 20 to the intermediate tapered bar 12, other forms of mechanically fastening such as brazing, gluing, threading, bolting, and the like are also contemplated by the present disclosure. Welding can be performed by any of several methods such as, but not limited to, MIG, TIG, GTAW, and inertia welding.
In accordance with the disclosed example, it may be advisable to apply post heat treatment to the weld at between about 1125 to about 1250 Deg. F. This heat treatment will provide stress relief and an annealing affect to the welded joints.
[0019] Referring now to Fig. 6, a concrete wall assembly is generally referred to by the reference numeral 40. The concrete wall assembly 40 includes a pair of wall forms 42a, 42b for defining the sides of the poured concrete wall 44. A
plurality of concrete taper ties 10 can be positioned between the wall forms 42a and 42b for holding the wall forms 42a, 42b at a desired spacing. The nut or nuts 24 can be tightened on the threaded end bars 18, 20 to securely hold the wall forms 42a, 42b in position when the concrete wall 44 is poured between the wall forms 42a, 42b.
After the concrete wall has hardened, the nuts 24 can be removed. The flats 26a, 26b, help ensure the threads 22 of the end bars 18, 20 are self cleaning. Foreign substances such as dirt or concrete are more easily removed from the threads 22 because of the discontinuity formed in the threads 22 by the flats 26a, 26b. The concrete taper tie 10 can then be removed by grasping one or both end bars 18, 20 and pulling the taper tie from the concrete wall 44.
[0020] Refernng now to Fig. 7, a cross-sectional view of an end bar 20 is shown with a gripping tool 32 grasping the flats 26a, 26b of the threaded end bar 20.
The gripping tool can include a pair of jaws 34a, 34b that are operable for grasping the flat surfaces 26a, 26b, such that the end bars can be gripped without marnng the threads 22 of the threaded end bar 20. The gripping tool 32 can be used, for example, to twist and pull the concrete taper tie 10 to facilitate removal of the concrete taper tie 10 from the finished concrete wall 44.
[0021] The threaded end bars 18, 20 can be repaired if they become damaged from use. The threaded bars 18, 20 can be removed from the tapered bar 12 by cutting, grinding, or torching and the like, if the end bars 18, 20 become bent or the threads 22 become damaged. The concrete taper tie 10 can be refurbished by attaching a new threaded end bar 18, 20 in a similar manner as generally described above.
[0022] While the preceding text sets forth a detailed description of numerous different embodiments of the invention, it should be understood that the legal scope of the invention is defined by the words of the claims set forth at the end of this patent.
The detailed description is to be construed as exemplary only and does not describe every possible embodiment of the invention since describing every possible embodiment would be impractical, if not impossible. Numerous alternative embodiments could be implemented, using either current technology or technology developed after the filing date of this patent, which would still fall within the scope of the claims defining the invention.
Claims (31)
1. A concrete taper tie, comprising:
an intermediate tapered bar having opposed first and second ends, a first threaded end bar extending from the first end of the intermediate tapered bar;
a second threaded end bar extending from the second end of the intermediate tapered bar;
at least one flat surface formed on each threaded end bar substantially along the entire length thereof.
an intermediate tapered bar having opposed first and second ends, a first threaded end bar extending from the first end of the intermediate tapered bar;
a second threaded end bar extending from the second end of the intermediate tapered bar;
at least one flat surface formed on each threaded end bar substantially along the entire length thereof.
2. The taper tie of claim 1, wherein at least one of the first and second end bars are welded to the intermediate tapered bar.
3. The taper tie of claim 1, wherein each flat surface forms a discontinuity in the threads of the end bars.
4. The taper tie of claim 1, wherein the intermediate tapered bar is made from a steel bar.
5. The taper tie of claim 4, wherein the steel bar comprises at least one of SAE 4140 or SAE 1144 cold rolled steel.
6. The taper tie of claim 1, wherein the end bars are made from GR160 steel.
7. The taper tie of claim 1, wherein the material used in the end bars is harder than the material used in the intermediate tapered bar.
8. The taper tie of claim 1, wherein the end bars are formed from hot rolled DYWIDAG threadbar.
9. The taper tie of claim 1, wherein each flat of the threaded end bars has a width ranging from 5 percent to 80 percent of a diameter of the threaded end bars.
10. The taper tie of claim 1, wherein each flat on the threaded end bars is sized to match with a jaw of a corresponding gripping tool.
11. A concrete taper tie, comprising:
an intermediate tapered portion including a first end having a first diameter and a second end having a second diameter, the second diameter being smaller than the first diameter; and first and second end portions mechanically attached to the first and second ends, respectively of the intermediate tapered portion.
an intermediate tapered portion including a first end having a first diameter and a second end having a second diameter, the second diameter being smaller than the first diameter; and first and second end portions mechanically attached to the first and second ends, respectively of the intermediate tapered portion.
12. The taper tie of claim 11, wherein each end portion includes threading grooves adapted to receive a threaded fastener; and a pair of flat surfaces extending substantially the entire length of the threading grooves and positioned approximately parallel to each other.
13. The taper tie of claim 11, wherein the first and second end portions are attached to the intermediate portion by at least one of welding, gluing, threading, bolting, press fitting, and brazing.
14. The taper tie of claim 11, wherein the intermediate portion is made from a steel bar.
15. The taper tie of claim 11, wherein the steel used to form the intermediate portion includes cold rolled steel selected from one of SAE 4140 and SAE 1144.
16. The taper tie of claim 11, wherein the end portions are made from GR160 steel.
17. The taper tie of claim 11, wherein the end portions are made from harder material than the intermediate portion.
18. The taper tie of claim 11, wherein the end portions are formed from hot rolled DYWIDAG threadbar.
19. The taper tie of claim 11, wherein each flat of the threaded end bars has a width ranging from 5 percent to 80 percent of a diameter of the threaded end bars.
20. The taper tie of claim 11, wherein each flat on the threaded end bars is sized to match with a jaw of a corresponding gripping tool.
21. A concrete taper tie, comprising an intermediate tapered bar;
first and second threaded end bars extending from opposing ends of the intermediate tapered bar, each threaded end bar having at least one flat surface formed substantially along the entire length thereof; and a pair of parallel opposed flat surfaces formed substantially along the entire length of each threaded end bar, the flats adapted to receive gripping jaws from a gripping tool and configured to leave enough threaded surface on either side of the flats to receive a threaded fastener for releasably locking the concrete taper tie to a concrete wall form.
first and second threaded end bars extending from opposing ends of the intermediate tapered bar, each threaded end bar having at least one flat surface formed substantially along the entire length thereof; and a pair of parallel opposed flat surfaces formed substantially along the entire length of each threaded end bar, the flats adapted to receive gripping jaws from a gripping tool and configured to leave enough threaded surface on either side of the flats to receive a threaded fastener for releasably locking the concrete taper tie to a concrete wall form.
22. A method of making a tapered concrete taper tie, comprising the steps of forming an elongate metal bar into a tapered bar;
forming threads on a first end bar and a second end bar;
forming at least one flat surface in the threads of each end bar; and attaching an end bar to each end of the tapered bar.
forming threads on a first end bar and a second end bar;
forming at least one flat surface in the threads of each end bar; and attaching an end bar to each end of the tapered bar.
23. The method of claim 22, wherein the end bar is attached to the tapered bar using friction welding.
24. The method of claim 22, wherein the end bar is attached to the tapered bar by welding.
25. The method of claim 24, wherein the weld is heat treated at between about 1125 and about 1250 Deg. F.
26. The method of claim 22, wherein forming at least one flat surface comprises the step of:
forming at least two flat surfaces in the threads approximately 180°
apart from one another.
forming at least two flat surfaces in the threads approximately 180°
apart from one another.
27. The method of claim 22, wherein the attaching step comprises the step of:
welding the end bars to the tapered bar.
welding the end bars to the tapered bar.
28. A method of refurbishing a concrete taper tie having a tapered intermediate bar and a pair of threaded end bars extending from the intermediate tapered bar comprising the steps of:
removing a defective end bar; and welding a non-defective end bar to the tapered intermediate bar.
removing a defective end bar; and welding a non-defective end bar to the tapered intermediate bar.
29. The method of claim 28, wherein the removing step further comprises the step of:
cutting the defective end portion from the concrete taper tie.
cutting the defective end portion from the concrete taper tie.
30. A method of forming a concrete wall comprising the steps of:
placing a pair of substantially parallel panels in a desired location;
inserting a welded taper tie between the panels in desired locations, each welded taper tie including a pair of threaded ends having at least two flat surfaces extending through a length of thread;
attaching a threaded nut to each end of the welded taper tie to hold the panels in position;
pouring concrete between the panels; and removing the welded taper ties and the panels after the concrete wall hardens.
placing a pair of substantially parallel panels in a desired location;
inserting a welded taper tie between the panels in desired locations, each welded taper tie including a pair of threaded ends having at least two flat surfaces extending through a length of thread;
attaching a threaded nut to each end of the welded taper tie to hold the panels in position;
pouring concrete between the panels; and removing the welded taper ties and the panels after the concrete wall hardens.
31. The method of claim 30, wherein the removing step comprises the steps of:
gripping the flat surfaces formed in the thread of at least one end bar with a gripping tool;
rotating the welded taper tie to break the taper tie loose from the concrete wall;
and pulling the taper tie from the concrete wall.
gripping the flat surfaces formed in the thread of at least one end bar with a gripping tool;
rotating the welded taper tie to break the taper tie loose from the concrete wall;
and pulling the taper tie from the concrete wall.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US60016304P | 2004-08-10 | 2004-08-10 | |
| US60/600,163 | 2004-08-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2515758A1 true CA2515758A1 (en) | 2006-02-10 |
Family
ID=35851929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2515758 Abandoned CA2515758A1 (en) | 2004-08-10 | 2005-08-10 | Welded taper tie |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2515758A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007031107A1 (en) | 2007-07-04 | 2009-01-08 | Stahlwerk Annahütte Max Aicher GmbH & Co. KG | Anchor rod for a formwork |
| WO2013026302A1 (en) * | 2011-08-23 | 2013-02-28 | 中国葛洲坝集团股份有限公司 | Framework corner positioning device and method |
| US9062457B2 (en) | 2013-02-11 | 2015-06-23 | Robert Gilling | Assembly and method for anchoring rebar to a mass |
-
2005
- 2005-08-10 CA CA 2515758 patent/CA2515758A1/en not_active Abandoned
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007031107A1 (en) | 2007-07-04 | 2009-01-08 | Stahlwerk Annahütte Max Aicher GmbH & Co. KG | Anchor rod for a formwork |
| WO2013026302A1 (en) * | 2011-08-23 | 2013-02-28 | 中国葛洲坝集团股份有限公司 | Framework corner positioning device and method |
| US9062457B2 (en) | 2013-02-11 | 2015-06-23 | Robert Gilling | Assembly and method for anchoring rebar to a mass |
| US9506250B2 (en) | 2013-02-11 | 2016-11-29 | Robert Gilling | Assembly for connecting rebar segments |
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| Date | Code | Title | Description |
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| FZDE | Dead |