Composite floor decks from D-Mac Industries feature a ribbed profile with embossments designed to interlock with the concrete slab. This design develops a strong bond with the concrete and creates a reinforced concrete slab.

Our composite floor decks serve a dual purpose: permanent form and positive reinforcement. With a cost-conscious designer, a permanent form eliminates the time and cost of carpenters to make - and then remove - wood forms, plus the cleanup time saved on lower floors.

During the construction phase, our decks carry the full dead load of concrete. While shoring may be required on extended spans while the concrete cures and reaches its maximum strength, the full live load is still carried by the steel and concrete performing together.

D-MAC furnishes all profiles of composite floor decks, custom cut or in stock lengths, with a galvanized finish for rust resistance and increased longevity.

Unit of Measure

Design Thickness

N/A 16 gauge (0.0598") 18 gauge (0.0474") 20 gauge (0.0358") 22 gauge (0.0295")

Height (Min.)

N/A 3 in

Pitch (Rib Spacing – Center to Center)

N/A 12 in

Cover Widths

N/A 24 in36 in


N/A Galvanized G60 Galvanized G90

Industry References

N/A 3" LOK Floor 3.0 CD 3VLI CFD3 SB300

Special Applications

N/A Cellular Cellular & Acoustical