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Brochure DYWIDAG Bonded Post-Tensioning Systems using Strands,
Filesize: 2.5 MB
Filesize: 2.5 MB
Technical Document Strands - Calculation of Elongation,
Filesize: 39 kB
Filesize: 39 kB
Approval ETA-03 0036 Unbonded Monostrand System with 1 to 5 Monostrands,
Filesize: 2.0 MB
Filesize: 2.0 MB
Technical Document Strands - Stressing Values and Stressing Record,
Filesize: 70 kB
Filesize: 70 kB
Bonded Strand Post-Tensioning System
Installation
DYWIDAG-Systems International has developed three different methods to insert strands into ducts. The selection of the insertion method depends on the boundary conditions of the structure and the job site.
Method 1: Pushing |
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| To push strands into the duct on the job site is very economical and can be done either before or after casting the concrete. The pushing equipment can be installed remotely and connected flexibly to the insertion point. DSI strand pushers provide relatively high speed of up to 8 m/s and require minimal operating personnel of only two men. These advantages make this method the preferred standard for strand installation. |  |
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Method 2: Pulling |
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To install strands while pulling them into
the duct can be very efficient in special
structures, for example where the loop
anchorage is used. In normal cases, the whole bundle of strands is pulled through winching with a steel cable. |
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Method 3: Pre-Assembled Tendons |
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| The prefabrication of tendons either in the shop or in the field can also be very economical, especially with shorter tendons and short shipping distances. Special uncoilers or hydraulic winches are necessary to properly install the tendons in the structure. |  |
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