DMK Cable Stay for Bridges & Structures |MK4 - Mekano4| Innovative Solutions

DMK Cable stay

The progress of cable-stayed bridges has been due to the need to build longer spans in a more economical way and the concept of visual landmark that this type of bridge brings to infrastructure networks. This progress goes hand in hand with the constant development of structural analysis, since the revival of the cable-stayed typology in 1955.

Our contribution

MK4 has been involved since its creation with the design and installation of cable stays for bridges and all kind of diverse stayed structures. Our staff, with more than 25 years experience in cable stays, together with DMK Stay have developed the DMK parallel strand stay system that fulfills the most demanding project requirements.

The following premises have been taken into consideration for the DKM Stay design:

Adjustable anchorages for full stay stressing or distressing.
Force checking or monitoring at any time.
Replacement of the stay, as a whole or each strand individually.
Prepared for damper installation.
Adaptable for special solutions

Dynamic behavior: 2 million cycles, 200 N/mm2, above the load limit 45% breaking limit (GUTS).
Static behavior: 95% of the breaking limit (GUTS).
Standard sizes range from 7 to 127 strands with 0.6” diameter.
You can use cords with a nominal diameter of 15.2 mm or 15.7 mm.

The basic stay is fully sealed to prevent water ingress and comprises at least 4 protective barriers for the steel of the cables at any point, ensuring maximum durability of the tensile element against corrosion. DMK stays are encapsulated forming a sealed unit.

They are linked to the structure only by the support of the anchor nuts on the distribution plates of the structure, the neoprene centralizers at the outlet of the guide tubes and on the shock absorber clamp, in case that option is used.

This configuration allows all the components of the stay to be dismantled without modifying the existing structure. In addition, the cables can be removed or replaced one by one if necessary.