What holds the roofing firmly? Purlins come into the picture when you need a sturdy and durable support structure for roofing sheets. Whenever a building is constructed, durability, endurance, and longevity are the essential factors that are looked for. The roofing provides an aesthetic appearance, protection, and safety of the building.
Purlins provide the required structural support for the building. Purlins support the metal roofing sheets system of the roof deck/sheeting, and rafters support the purlins. Purlins are available in various types based on the material and shape. The predominantly preferred ones are steel purlins.
In this article, we will give a brief introduction to the types and uses of purlins. Let’s start with the fundamental question, “What is C and Z purlin?”.
C Purlin:
As evident from the name, it is a long horizontal beam similar to the letter C. The C purlin is used to support walls and floors. It has many applications like garages, industrial buildings, verandahs and other structures that require durable and sturdy steel framing. It is also used in window trimming, door framing, and roof trimming. They are easy to handle, and their length can be increased since they have a uniform structure. It is easy to install and provides stable support.
Below are the advantages of C purlin,
- Side drilling/cutting is not required.
- Durable
Z Purlin:
The Z Purlins form the support for the wall joint and roof. The Z shape of the purlin helps in overlapping, resulting in a more substantial structure than C purlins. In industrial designs, Z purlins are used because of their strength.
Below are the advantages of Z purlin,
- Greater intensity
- Allows overlapping
- Reduced material usage
At CryonRoofings, we provide C and Z purlins at affordable market prices. To inquire about the price, contact roofing sheet manufacturers in Chennai.
Finishing in C and Z purlins:
Purlins come with two types of finishing lead oxide or galvanised. There are no structural differences in both finishing methods, but it comes in handy when deciding on the place of construction.
Red oxide:
It is sprayed with red primer and then painted red to give additional protection from rusting and lousy weather. Red oxide is the best option to choose if you are looking for
-
Inexpensive
-
Weather moderator, and
- Colours options
Galvanised:
It is a corrosion-resistant process where the material is coated with zinc. This allows it to withstand harsh environments like chemical industry, near the sea shore, etc. Galvanised metals can be suitable for use with the below functions,
Long-lasting
Areas near the sea or ocean with harsh weather
Without paint
Comparison of C and Z purlins:
The moment of inertia of Z purlin is higher than C purlin; hence, it is recommended to use Z purlin for more integrity.
Unlike the C purlin, the Z purlin can be overlapped many times, which helps you in increased span.
You can use Z purlin in roofing sheets that requires high load capacity because the strength of Z purlin is high due to the overlapping.
For single-span frame structures, C purlin is the best.
Are you still confused about choosing the right kind of purlin? At Bharath Steel, we have over 20 years of experience in steel trading and are considered to be one of the city’s leading Z purlin manufacturers and C Purlin manufacturers. We will help you find the best purlin that suits your project.