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What is the difference between Z and C purlins?

Published in Building materials 2 mins read

The main difference between Z and C purlins lies in their strength and typical applications in construction, as outlined in the provided reference.

Key Differences Between Z and C Purlins

According to the information provided:

  • C purlins are more lightweight and are typically used to support walls and floors.
  • Z purlins are stronger and are commonly used for roofing and walls.

This distinction highlights their suitability for different structural roles based on the load requirements. Z purlins, being stronger, are preferred for roofing where loads (like snow, wind, and the roofing material itself) can be significant. C purlins, being lighter, are often adequate for wall girts or supporting floor joists in certain applications.

Here's a simple comparison based on the reference:

Feature Z Purlins C Purlins
Strength Stronger More Lightweight
Typical Use Roofing and Walls Walls and Floors

It's also worth noting that these purlins serve as secondary structural members that bridge the gap between main structural elements (like the beams mentioned in the reference: heavy RHS I and H beams, along with web trusses formed out of RHS & SHS) and the building's cladding or roofing material.

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