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FORQUES. Joint applicable in new construction and renovation that prevents strain in interior walls

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[FORQUES]Commercial_Sheet_UPM_EN(Innovatech) PDF

New joint between slabs and walls, easy to install, which avoids stress transmission between structural elements and interior walls


Researchers from the Technical University of Madrid (UPM) have developed a board that solves the encounter between slabs and walls, designed to prevent the stress transmission between such components, essentially due to slabs’ deformations. This solution, valid for walls and floors of every kind and nature, will allow to visually detect the correct positioning of the joint between the wall and the upper slab. In addition, it prevents the appearance of fissures and cracks in walls due to excessive deflection of slabs.

Technology Solution

The solution consists of a device designed to solve the joint that occurs in the encounter between the walls and slabs in buildings. The system proposed does not allow transmitting the slab deformation to the interior walls. This joint is placed during the wall construction, in its encounter with the top slab.

It is a prefabricated element easy to carry and handle. 

“Our solution will reduce the transmission of forces between the slabs and interior walls, both in new construction and renovation”


Market demands


  • Concern in the construction sector due to the deformation of increasingly flexible structural elements.
  • In recent years, over 30% of building slabs have led to excessive deformation problems (Cercha nº 73/2004)
  • The main claim to building insurance companies  refers to interior walls damage (Cercha nº 73/2004)

“The solution developed avoids the appearance of cracks and fissures in walls due to excessive deflection of slabs”

Market potential

Global expectations

  • Meteoric growth in construction sector (around 70%) concentrated mainly in China, USA and India [Oxford Economics and Global Construction Perspectives].
  • An employment increase by 33% is expected in the USA during the period 2010-2020, reaching a total of 1.8 million jobs in the sector in 2020 [Department of Statistics, USA].


  • Expected growth of the sector in Spain by 2.5% in 2015-2020 [Oxford Economics and Global Construction Perspectives].
  • Potential housing demand will be located above 300,000 households between 2011 and 2016 [BBVA Bank, 2011].
Competitive advantages


  • Valid for both new construction and renovation.
  • Effective for walls and slabs of every kind and nature.
  • Prefabricated element, easy to carry and handle.
  • Avoids transmitting vertical loads from slabs to walls, preventing damage to the latter.
  • Enables to visually check the correct construction of the wall.
  • Allows to visually detect, during construction, the correct positioning of the joint between the wall and the upper slab. It decreases the risk of future problems and associated costs.
  • Avoids the appearance of fissures and cracks in walls due to excessive deflection of slabs, resulting in cost savings.
  • Avoids force transmission to the partition of indoor plants.
  • Allows creating a joint between a deformed slab when renovating.

  • Extensive research activities and collaboration with industry.
  • Research group oriented to technological innovation and implementation of patents.

  • Patent granted in Spain ES2398273
Development stage

  • Concept
  • R&D
  • Lab-Protoype
  • Industrial Prototype
  • Production

Forques Contact

Fidel Carrasco; e: fidel.carrasco@upm.es

Tomás Gil; e:tomas.gill@upm.es

Amparo Verdú; e:  amparo.verdu@upm.es


UPM contact

Innovation, Commercialization and Entrepreneurship Area

Centre of Support for Technological Innovation – UPM 

e: innovacion.tecnologica@upm.es

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