Post-tension

The first evidence of ALGA active involvement in the study and development of the prestressing technology, dates back to 1942 and is proved by a Patent 399934, with which G. Marioni, Alga’s founder, and P. Noli protected their invention about the pre-tensioning of concrete, or concrete and brick elements, to be used as resistant components in the composite structures. Since that year, Alga has been continuously present in the field of the prestressing gaining a considerable experience, which allows it to be one of the leader firms in this area.

ALGA developed a complete post-tensioning system including:
• ALGACABLE – Strands Post-tensioning system including stressing anchorages type M, fixed anchorages type F, E, B and S, active and passive junctions type V and K and intermediate anchorages type C
• ALGABAR – Bars post-tensioning system up to 46 mm diameter
• ALGASTAY – Stay cables up to 91 and more strands

Among the various advantages of the ALGACABLE technology we wish to emphasize the stressing jacks extreme lightness, thanks to a sophisticated technology protected by patent. Thank to this technology lifting and moving the jacks, in particular in difficult locations like the inside of box girders, is greatly simplified.