GB742737A - Improvements in and relating to bar gripping means for use in the production of prestressed concrete - Google Patents
Improvements in and relating to bar gripping means for use in the production of prestressed concreteInfo
- Publication number
- GB742737A GB742737A GB1322953A GB1322953A GB742737A GB 742737 A GB742737 A GB 742737A GB 1322953 A GB1322953 A GB 1322953A GB 1322953 A GB1322953 A GB 1322953A GB 742737 A GB742737 A GB 742737A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bar
- collar
- thrust
- wedges
- jack
- 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
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/08—Members specially adapted to be used in prestressed constructions
- E04C5/12—Anchoring devices
- E04C5/122—Anchoring devices the tensile members are anchored by wedge-action
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/08—Members specially adapted to be used in prestressed constructions
- E04C5/12—Anchoring devices
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Abstract
742,737. Clamps. LEE, D. H. March 22, 1954 [May 12, 1953], No. 13229/53. Class 44. [Also in Group X] - A gripping device for prestress bars used in the production of prestressed concrete (see Group X) comprises a collar through which a prestress bar passes axially, wedges within the collar surrounding the bar and two coaxial threaded surfaces on the collar of different diameters. The embodiment of Fig. 1 shows the device applied to a method of post-tensioning concrete. A bar 1 projects from a channel 3 in a concrete member 4 and is engaged by two, or more, oppositely spaced wedges 10 that are flat on all but their bar contacting surfaces which are shaped to have major surface contact with the bar 1. The wedges 10 are embraced in a tapering axial hole 12 in a collar 13, the threaded exterior surfaces of which engage an adjustable thrust collar 18, and a shaft 7 of a tensioning jack through adapting collars 16 and 17. A rectangular thrust-plate 19 with rubber facing 20 takes the thrust of the tension jack and when bar 1 is under tension the thrust collar 18 can be screwed down on to the thrust plate 19 to allow the removal of the tension jack while retaining the bar under tension. In a second embodiment the shaft 7 is connected to the collar 13 by an internal thread and the thrust collar 18 comprises a short cylinder threaded on to the collar 13 and butting against a plain cylinder which acts as a distance piece to the thrust plate. The wedges may have arcuate outer surfaces in cross-section and lie within a tapering aperture of correspondingly circular cross-section in the collar 13. The bar engaging surfaces of the wedges may be grooved to mate with ribs raised on the bar or may be serrated to grip the bar.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1322953A GB742737A (en) | 1953-05-12 | 1953-05-12 | Improvements in and relating to bar gripping means for use in the production of prestressed concrete |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1322953A GB742737A (en) | 1953-05-12 | 1953-05-12 | Improvements in and relating to bar gripping means for use in the production of prestressed concrete |
Publications (1)
Publication Number | Publication Date |
---|---|
GB742737A true GB742737A (en) | 1956-01-04 |
Family
ID=10019190
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1322953A Expired GB742737A (en) | 1953-05-12 | 1953-05-12 | Improvements in and relating to bar gripping means for use in the production of prestressed concrete |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB742737A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2623551A1 (en) * | 1987-11-25 | 1989-05-26 | Freyssinet Int Stup | IMPROVEMENTS ON SURFACES AND THEIR COMPONENTS |
CN113374177A (en) * | 2021-06-29 | 2021-09-10 | 长安大学 | Anchor device |
WO2023179878A1 (en) * | 2022-03-25 | 2023-09-28 | Vsl International Ag | Cable anchorage system and method for anchoring a cable |
-
1953
- 1953-05-12 GB GB1322953A patent/GB742737A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2623551A1 (en) * | 1987-11-25 | 1989-05-26 | Freyssinet Int Stup | IMPROVEMENTS ON SURFACES AND THEIR COMPONENTS |
CN113374177A (en) * | 2021-06-29 | 2021-09-10 | 长安大学 | Anchor device |
CN113374177B (en) * | 2021-06-29 | 2023-02-17 | 长安大学 | Anchor device |
WO2023179878A1 (en) * | 2022-03-25 | 2023-09-28 | Vsl International Ag | Cable anchorage system and method for anchoring a cable |
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