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Composite flooring

COFRASTRA - composite floors are load bearing flooring systems made of steel profiles, reinforcements and concrete poured on site. The profiles serve as formwork as well as reinforcements.

The composite effect with the steel profiles is achieved thanks to its undercut shape and the open ribs. This way, Cofrastra enables a unique surface adhesion and does not require end anchorage.

The adjusted combination of the materials steel and concrete presents numerous advantages for economical and efficient construction with high aesthetic requirements.

Due to Cofrastra's special geometry, it is lighter than composite flooring systems of the same thickness and thus reduces the total weight of the building.

With the design tool Cofra5 ArcelorMittal Construction offers the possibility to calculate your floor structures online and print the results. 

  Cofrastra 40
  Cofrastra 56
  Cofraplus 60  
  Cofrastra 70


  • The steel profile serves as a formwork without further assembly support.
  • Due to the mechanical connection between contrete and the steel profiles is used as reinforcement
  • Fast and easy assembly without subject to changes in weather
  • It is a safe working platform before the concrete pouring
  • Substantial savings can be achieved in construction time & weight
  • Without additional reinforcement the composite floors have a fire resistance of 30 minutes.
  • Combination with different types of structural materials possible: steel, reinforced concrete, precast concrete,  masonry
  • With adequate fixing horizontal loads of the structure can be supported

Walls & Cladding Roofs Flashings Structure Floors Accessories Car park
Cladding panels PUR/PIR
Mineral wool panels
Liner trays
Trapezoidal profiles
Sinusoidal profile
Design profiles

Roofing panels PUR/PIR
Mineral wool panels
Trapezoidal profiles
Sinusoidal profiles

Functional &
aesthetic flashings

Multibeam Composite floors
Cofrastra & Cofraplus


Cofraplus 220

Design tool: 

  Cofra5 Designsoftware

More information:

  Colours & coatings

Contact Germany:

Dipl.Ing. Matthias Köhler
Tel.:    034954/455-937
Mobile: 0172-8939952
Fax:    034954/455-960

Reference projects:

  References with composite floors