Supplied to, and trusted by the construction industry for more than 30 years.

Steel Composite Flooring Systems

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Product Range

Tray-dec 80

Trapezoidal style of composite flooring and the strongest of all Tray-dec profiles.

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Tray-dec 60

Intermediate decking solution with mid-range spanning capabilities.

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Tray-dec 300

A flat soffit composite deck to act as tensile reinforcement and permanent formwork.

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Design Software

Incorporate Tray-dec products in any of your upcoming projects with our new Excel based design software


The Tray-dec composite floor design software is an Excel based programme in accordance with the new building standard in composite structures; simply input all relevant parameters and all calculations take place immediately.

The software is supplied with a complete set of instructions.

Please click the link BELOW to request the latest version of the design software. You will be asked to enter your email address and accept the terms and conditions before proceeding. When an updated version of the software is available, all users will be notified.


Version 2023.6 released!

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About Traydec

Supplied to, and trusted by the construction industry for more than 30 years, Tray-dec products are manufactured to comply with the latest building standard in steel composite structures AS/NZS 2327:2017.

  • The composite action of our steel flooring and concrete produces a floor which is very strong and light in weight
  • All profiles interlock with adjacent trays acting both as tensile reinforcement and permanent formwork for a concrete slab
  • Designed to maximise load carrying capacity and reduce the requirement for temporary propping.
  • Cold rolled from high strength zinc-coated steel coil conforming to AS 1397-2011
  • All coatings are to class Z275, giving a minimum coating mass of 275g/m²
  • Available in any length, subject to limitations of available transport (the maximum recommended length is 12m).


100% NZ owned and Operated. Manufactured in Avondale, Auckland.


Our installation teams are equipped with the know-how and tools to install all Tray-dec profiles and to weld Nelson shear studs.

Our teams are fully trained and certified in height safety. They have the experience, tools, safety equipment and expertise to provide a quality job every time. Installation teams are also certified stud welders. Please visit the stud welding tab for more information.

When quoting projects, we can offer a supply and installation service or a supply only option if you choose to install Tray-dec products yourself. If supply only is preferred, our builders guides can be found in the resources page for a complete list of instructions.


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