Spain’s Most Important Engineering Company Relies on DYWIDAG Monostrand Post-Tensioning Systems

IDOM, one of the most important engineering companies in Spain, recently built its new headquarters in Madrid. The new 10 story office building (4 floors of which are taken up by the garage) was constructed from April 2009 to January 2010.

The six office floors were reinforced using unbonded monostrands supplied by DSC. The prestressed floors have a total surface of approx. 12,000m². In total, DSC supplied more than 140t of Y 1860 S7 A=150mm² strand, together with more than 10,500 pieces of stressing, dead end and coupling anchorages complying with European approval ETA-03/0036.

All of the tendons were preassembled at DSC’s warehouse in Madrid and then shipped to the job site just in time. The monostrand tendons were cut to their exact length and the dead ends installed before the tendons were shipped to the job site.

DSC installed the tendons in their exact final position according to ETA-03/0036. The stressing operation, also carried out by DSC’s workers, took place two days after concreting.

A net of water pipes cast in concrete was installed in the post-tensioned floors. Due to concrete core activation, this system, which is known as the TABS system (Thermally Activated Building Structures), reduces air conditioning costs.

Each post-tensioned floor was built in a three week, five day working cycle. The slabs are 40cm thick, and each floor has 2 construction joints.