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ZinTruss is a suitable C purlin that provide long spans between portal frames on your building. ZinTruss C purlins are available in different sizes and material strengths to match the design frame of your building.

Suitable For :

  • Apartments
  • Bungalows
  • Factory Buildings
  • Hostels
  • Modern Longhouses
  • Multipurpose Halls
  • Quarters
  • School Buildings
  • Shop Lots
  • Warehouses
  • Storage houses


  • Capable to provide impressive spans.
  • Accurately roll-formed to ensure efficiency.
  • Lightweight and economical alternative to timber purlins.
  • Clean and crisps surface.
  • Quick and easy to install using standard metal fasteners.
  • Eliminating the time consuming process of cutting to length.

Section Height

ZinTruss C purlins can be pre-punched holes in accordance with international standard. They are intended for use with 12mm diameter bolts.


ZinTruss C purlins are manufactured from High Tensile Galvanised Steel Z275 or Z220 coil in accordance with JIS G3302.

Corrosion Protection

A zinc coating of Z275 (275g/m2 minimum coating mass) is the standard coating class provided with ZinTruss C purlin.

This will provide a long and trouble-free life for enclosed buildings and open-sided rural buildings, in a non-aggressive environmet, recommended is 1000 meters from rough surf, 750 meters from industrial emission and fossil fuel combustion and 300 meters from calm salt waters.

Consideration must be given to the nature of activities performed within the building.


The zinc coating on purlins is fully compatible with the zinc and zinc/aluminium coatings used on roof and wall sheeting.

The galvanised coating used on the steel to manufacture ZinTruss C purlin is designed for internal use only. The coating should not be used in contact with chemically treated timber or other treated products in the presence of moisture.


Available custom-cut in any transportable length. For normal deliveries nominal length should not exceed 12 meters with special transportation and on-site handling facilities.

Lengths greater than 20 meters require a special transportatio permit from the loal authority. No custom-cut length for less than 1.5 meters available.

Section Properties

ZinTruss C purlins are manufactured in a number of strengths by referring to the following table:

Truss Configuratios

The terms below are typically used to describe the various parts of a metal plate connected steel truss. The truss profile, span, heel height, overall height, overhang and web configuratio depend on the specific design conditions and will vary by application.

Pre-punched Holes


ZinTruss C purlis can be pre-punched holes in accordance with iteratioal standard. They are intended for use with 12mm diameter bolts.



ZinTruss C purlins warrant the prime quality of their galvanised products, but cannot accept liability for damage to the material sustained during and after profiling, transport to or storage at the building site, and during erection.


ZinTruss C purlins has a variety of accessories that are adaptable to all practical applications. Any combination of channel, locator end, lock end and bolted end can be supplied in pre-assembled form.



ZinTruss C purlins are delivered in strapped bundles. The actual quantity in each bundle will vary with section size, order and length.


Bundles of purlins should be neatly stacked off the ground and on slight slope so that water can drain away. If in the open, it should be protected with waterproof covers to prevent the entry of water and condensation. Such moisture cannot evaporate readily and can cause coating damage which can reduce the life of the product. If bundle becomes wet, the purlins should be separated, wiped dry and covered.

Other accessories should be treated similarly. Bolts and nuts in particular should be kept clean, dry and free of dirt or dust to prevent problems when tightening. Bundles of purlins must be lifted carefully to avoid damage. Long length should be lifted using a separator bar and fabric slings. Care should be taken seriously to prevent local damage at the lifting points.


The welding of purlins is not recommended. The heat produced in wielding will affect the material properties of the High Tensile Galvanised Steel used by ZinTruss C purlins. In many instances considerable stress concentrations are likely to arise, even with good quality welding. In addition wielding will locally remove the galvanised coating leading to a potential reduction in durability.

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