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Lost formwork system

Fast and light slabs solutions for your project. Our range of corrugated profiles is designed to support the weight of concrete and construction loads during the construction phase. Unlike the composite slab system, the ribbed profile does not collaborate at a strength level with the concrete once it has set.
  • Versatile systems that adapt to any type of structure
  • Reduce execution time
  • They achieve fire resistance of up to REI 240 without the need to project
  • They allow spans of up to 6 m without the need for shoring
  • Arrange the floor embedded in the structure to increase the free height
sketch of permanent formwork system - scheme

Permanent non-composite formwork profiles

Permanent formwork is a quick and lightweight slabs solution for your project. Our range of corrugated profiles is designed to support the weight of concrete and construction loads during the construction phase. Unlike the composite slab system, the ribbed profile does not collaborate at a strength level with the concrete once it has set.

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  1. Principal structure
  2. Support profile
  3. Anti-cracking and positive armor
  4. Concrete

Related information

The lost formwork system consists of a galvanized steel ribbed profile that serves as formwork for a concrete slab executed in situ. The main function of the corrugated profile is to support the loads of execution and pouring of concrete, avoiding the need for shoring.

Unlike the composite slab solution, in the lost formwork solution the profiles do not have inlays and do not subsequently collaborate with the concrete slab. Due to this lack of contribution from the sheet metal, the use of positive reinforcement in the slab is mandatory, using a bar in each rib of the profile. Using this solution, light slabs can be made, with a self-weight of less than 2 kN/m², through an agile and simple execution procedure.

  1. The structure, formed by support beams every 3-5 m, is responsible for supporting the main actions of the floor, guaranteeing its integrity and stability.
  2. The permanent formwork profile constitutes the first layer of the slab and is placed and fixed on the structure. This element supports the execution loads during the formwork phase, meeting the corresponding mechanical requirements.
  3. The reinforcements in the slab with formwork profiles are organized according to their function: the anti-cracking reinforcement or mesh, necessary in every slab to control cracks on the upper face of the slab, the negative reinforcement, generally included in the amount of the mesh to reinforce the areas of negative moments on the supports, and the positive/fire reinforcement, necessary in all cases, providing resistance against bending forces and additional reinforcement in fire resistance.
  4. The concrete, which is poured directly onto the formwork profile, forms the resistant section of the floor and provides the strength and rigidity necessary to withstand the design loads.
Lost formwork system sketch - diagram
Lost formwork system sketch – diagram
SYSTEM COMPONENTS SYSTEM ACCESSORIES
1. Non-composite Formwork | INCO 70.4 Formworka.-Trimming | Cantilever Edge Trim
2.-Reinforcement | Anti-cracking and Negativesb.-Trimming |Edge Trim
3.-Structure | Concretec.-Trimming | Fastening Strap
d.- Tightness | Bottom Joint
  • Industrial: Warehouses and production centers
  • Logistics Center: Warehouses and distribution centers
  • Commercial: Canopies, offices and commercial surfaces
  • Infrastructure: Stations and airports
  • Public: Schools, markets and hospitals
  • Sports: Stands, sports courts and pavilions
  • Agricultural: Stables, farms and sheds
  • Packaging and transport: The lost formwork profiles are grouped in strapped packages of 20-25 sheets, with a maximum length depending on the type of profile and a maximum weight of 1,500 kg. Each package includes an identification label with details of the manufactured product, order and destination. Transportation is preferably carried out in a truck closed with a tarp to prevent the material from being exposed to the elements.
  • Reception and unloading: Before unloading, it is verified that the material matches the geometry and thickness specified in the project. Unloading is carried out with the appropriate lifting means, and preferably directly in the installation area, to minimize movements on site.
  • Storage and protection: On site, the packages are stored in a covered and ventilated area on inclined wooden sleepers and are protected from humidity with breathable tarps. Packages are not stacked more than three high and no other materials are placed on them.
  • Installation on the structure: The packages are placed on the main beams, close to the supports, ensuring that the structure can support their weight. They are oriented in the direction of installation and are placed manually, sheet by sheet, under the supervision of the Construction Management. In the case of large pieces, the sheets are lifted individually from the ground to their position on the slab.

INCO 30.4 Formwork Data sheet

INCO 30.5 Formwork Data sheet

INCO 44.4 Formwork Data sheet

INCO 70.4 Formwork Data sheet

INCO 100.3 Formwork Data sheet

INCO 155.3 Formwork Data sheet

Dpd cladding profiles Incoperfil

Formwork deck profiles catalog

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Featured Products

INCO 70.4 Formwork

INCO 70.4 FACHADA
  • Maximizes clearance between floors
  • Without shoring up to 4 m
  • Thickness: 0,75 – 1,2 mm
  • Slab depth from 110 mm
  • Up to 2.500 m² / transport

INCO 100.3 Formwork

INCO 100.3 FACHADA
  • Light and strong
  • Without shoring up to 5 m
  • Thickness: 0,75 – 1,5 mm
  • Slab depth from 140 mm
  • Up to 2.500 m² / transport

INCO 155.3 Formwork

IMG 01_INCO 155.3 F
  • Robustness and acoustic comfort
  • Without shoring up to 6 m
  • Thickness: 0,75 – 1,5 mm
  • Slab depth from 200 mm
  • Up to 2.100 m² / transport

INCO 155.3 lost formwork in the Volkswagen Navarra Extension

The extension of the Volkswagen production centre incorporates the lost formwork system with the INCO 155.3 profile for the new slab levels

The extension of the Volkswagen production centre incorporates the lost formwork system with the INCO 155.3 profile for the new slab levels

10,000 m² of composite slab with INCO 100.3 for 121 homes in Torrejón de Ardoz (Madrid) – Spain

Industrialized construction using the steel framing and composite slab system, covering spans of up to 4 m free span without the need for propping.

Industrialized construction using the steel framing and composite slab system, covering spans of up to 4 m free span without the need for propping.

Projects

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Complete the form below to receive a detailed report justifying the most suitable enclosure profile. You will receive the information as soon as possible.

Building characteristics
Industrial roof application loads
(1) For sections of the roof profile with 2, 3, 4 or more supports, indicate the greatest distances between supports that appear in your project.
Type of environment
Attached documentation
Additional comments
Contact information
Project data
Building characteristics
Application loads for the industrial facade
(1) For sections of the façade profile with 2, 3, 4 or more supports, indicate the greatest distances between supports that are presented in your project.
Type of environment
Attached documentation
Additional comments
Contact information
Project data
Building characteristics
Deck loads
(1) For sections of the roof profile with 2, 3, 4 or more supports, indicate the greatest distances between supports that appear in your project.
Type of environment
Attached documentation
Additional comments
Contact information
Project data
Structure features
Composite slab characteristics
(1) For the sections of the composite slab with 2, 3, 4 or more supports, indicate the greatest distances between supports that appear in your project. Span length < 5,00 m.
Type of environment
Attached documentation
Additional comments
Contact information
Project data
Building characteristics
Characteristics of the facade
Roof typology

(1) Indicate the length of the span of the arch, which is the greatest horizontal distance between the supports of the curved roofing.

(2) Plan-view dimension representing the full length of the curved roof measured perpendicular to the arch span.

(3) Specify the obstructed area under the canopy, in square meters, as a proportion of the total area of the front or side (transverse or longitudinal) façade, in order to calculate the obstruction factor. If it is a closed construction or there is no obstruction area, indicate 0 m².

Environment characteristics
Type of environment
Attached documentation
Additional comments
Contact information
Project data

Latest projects

Encofrado perdido INCO 155.3 PARA VOLSKSWAGEN NAVARRA

INCO 155.3 Formwork

INCO 155.3 lost formwork in the Volkswagen Navarra Extension

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INCO 100.3 Composite

10,000 m² of composite slab with INCO 100.3 for 121 homes in Torrejón de Ardoz (Madrid) – Spain

See more