Our manufacturer is the most professional and the biggest post tensioning ducts supplier in China, and have been in this industry more than 20 years. It is same as the PT ducts manufactured by Spiro tube-former adopt 78mm width raw material. The post tensing tube-former is designed by our high engineer, till now we are still the exclusive one in china to supply this kind duct. And it is special for exporting. Especially The normal parameters about the ducts have been showed in the up form, still the special request can be made the negotiation. We have full ability to supply the custom post tensioning ducts according to client’ s request with the advantage of our tube former machine design ability.

• Round Post Tensioning Duct – with 78mm width raw material

Spiral round Concrete Corrugated Post Tensioning duct Brief introduction
This type round corrugated duct is roll formed by the 78mm width GI steel strip, with its special corrugations and high radial stiffness. The corrugated tubes meet with structural design specifications for void former in concrete structures, used to reduce the cross section area and thus the weight of the structure. It is a very rigid but yet light weight sheet metal tubing that without excessive deforming, withstands existing forces during the pouring of the concrete. The spiral seam is tight and no water from the concrete will enter the tube. The low weight of the tubing makes it easy to handle.
Spiral Concrete Corrugated Post Tensioning duct description – 78mm width raw material

• Round Post Tensioning Duct – with 36mm width raw material

Spiral round Concrete Corrugated Post Tensioning duct Brief introduction
This is round corrugated duct is roll formed by the 36mm width GI steel strip, we are special to prepare this duct for overseas countries.
With its special corrugation design on this duct, radial stiffness characters will be much more better than the one in the present Chinese market. The corrugated tubes can meet with structural design specifications for void former in concrete structures. It is a very rigid but yet light weight sheet metal tubing that without excessive deforming, withstands existing forces during the pouring of the concrete. The spiral seam is also tight and no water from the concrete will enter the tube. It can be used as culverts and forms for concrete pipes, plinths and columns, wall and slab construction, used to reduce the cross section area and thus the weight of the structure.

Spiral Concrete Corrugated Post Tensioning duct Application samples
We provide patented invention SINO spiral corrugated post-tension tubes Series to meet the changing market. It is being used as culverts and forms for concrete pipes, plinths and columns, and favorable effect on foundation, wall and slab construction.
On many construction projects like apartment buildings, parking garages, office buildings, industrial buildings, bridges and docks, schools and hospitals, the introduction of the prestressed protection tubes will make it possible to use very long spans. The reduction in weight allows large areas and fewer columns which in turn will give technical economical and esthetic advantage.

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