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Flexible system to execute any concrete slab with maximum safety

Flexible formwork system, adaptable to any type of floor shape, no matter how complex. It uses two basic components: Multiple “U” support girder, and girder. Adapting to the work method used by Alsina’s customers for over 30 years, the system takes a step further by facilitating the interface between walls and hanging beams by allowing overlap both in the direction of the girders and in the direction of the beams. Phenolic plywood is used for an exposed concrete finish, and it also allows the use of the Alisan family of panels.

PEDRO - horitontales 2

Are you looking for a solution for your slabs? Contact us to discuss further!





  • Braced system: when girders are secured in their corresponding housing, they cannot slip.
  • The semi-rigid coupling system makes assembly easy and guarantees a highly-stable assembly.
  • Allows the board/phenolic board to be nailed to the girder thanks to the wood incorporated inside it.
  • Flexible and versatile: adaptable to different slab shapes.
  • Facilitates the interface between walls and beams to be able to overlap each other both for girders and support girders.
  • Just one system addresses the entire structure, thus increasing productivity. This factor translates into significant savings in both materials and labour.
  • Structural components made of high resistance steel.

Components and accessories

  • Support girder with “U” housings.
  • Girder or primary beam.
  • Formwork surface.

Frequent uses

  • Unidirectional slabs, cast-in waffle slabs, solid slabs with exposed concrete finish or complex floor shapes.
  • Slabs with hanging beams.


Clear Filters
Curicó Hospital
Curicó Hospital

Alsina’s Chilean delegation participated with great success in the construction of the Curicó Hospital.

Bello Wastewater Treatment Plant
Bello Wastewater Treatment Plant

It is the second of its kind in the metropolitan area of the city of Medellín.

Juan Díaz Wastewater Treatment Plant Extension
Juan Díaz Wastewater Treatment Plant Extension

Alsina’s Formwork delegation in Panamá participated in the construction of the second module of the sewage treatment plant of a wastewater treatment plant.

Maldonado Wastewater Treatment Plant
Maldonado Wastewater Treatment Plant

Alsina collaborated with the customer UTE OAS-CIEMSA in building the Wastewater Treatment Plant located Uruguay.

need help? call us!

+34 935 753 000

Pol. Ind. Pla d’en Coll
Camí de la Font Freda, 1
08110 Montcada i Reixac (Barcelona)


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