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Challenging cantilevers

UHPC Applications RDC cantilevers 1

A cantilever is a beam or girder fixed at only one end, which is generally used in bridge construction, residential buildings, etc. Increasing the length for certain beam depth increases the slenderness, generating a more attractive and astonishing structure. However, increasing the length of a cantilever is challenging due to the significant bending moment induced in the fixed support by the dead and live loads. In these cases, using UHPC is a very interesting option because the structure can be up to 70% lighter than an ordinary concrete structure, so the dead load is significantly reduced and the depth of the element can be reduced, having an element with greater architectural value. This is a very common example of how lightness of a UHPC structure can not only reduce the costs, but also to provide additional value through aesthetics so that the client chooses a solution that is unfeasible with other materials. As an example, the figures below show a 12-m swimming pool designed by RDC as a cantilever and produced by PREFFOR. The client is Casas InHaus.


  • Higher slenderness than ordinary concrete cantilevers is possible, adding more architectonical value to the solution.
  • Compared to steel structures, UHPC cantilevers reduce maintenance and may have better performance under vibrations.
  • The lightness implies savings in manipulation and commissioning costs.
UHPC Applications RDC cantilevers 2

More Applications

UHPC Projects


RDC can evaluate the affordability of using UHPC in an specific Project, conduct an optimized design and deliver the tailored Formex® premix to carry out the in-situ works.





UHPC (Ultra-High Performance Concrete) is an extremely compact and ductile cementitious composite. Its properties make it perfect for applications where durability or maintenance play a significant role, where a lightweight structure is particularly relevant, or where the slenderness or thickness of piece is is important.



RDC works closely with the client to evaluate the technical, economical and environmental viability of replacing its current solution by UHPC. A tailored premix of Formex® is proposed to maximize the competitiveness of the new element.



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