What are Metal Building Purlins?

A metal building has many elements that make it strong, stable, and durable. Roofing elements contribute to the overall strength and longevity of a building. A solid roof can increase the functionality of a steel building and make it last for decades.

Metal purlins are one of the most critical elements in a metal building. Purlins provide critical support to the roof sheeting. Choosing the correct type of metal purlin is crucial.

This article will give you an overview of what metal purlins are and their function. You will learn about different types of purlins and how to choose the correct one for your metal building.

Contact the metal building experts at Titan Steel Structures today to learn more about metal purlins. You may also get a customized quote for your project.

What are Metal Purlins?

Metal buildings provide durable, adaptable shelters for a wide range of needs. People use steel buildings for industrial, agricultural, personal, and commercial purposes. Metal buildings are often the most cost-effective, durable option available.

One of the most significant benefits of choosing a steel building is its strength. Steel is a naturally durable building material. It is resistant to many common problems, including water damage, pests, and fire.

Steel buildings consist of several elements. Steel purlins are an essential part of metal roofing. A metal purlin is a horizontal beam or bar. Purlins provide structural support to the roof.

Purlins are lightweight but can support a great deal of weight. Metal purlins support the bulk of roof decking and contribute to the structural integrity of the entire structure.

Exploring Different Types of Purlins

There are several types of metal purlins. Choosing the correct type when constructing the secondary frame of your metal building is crucial.

Here is an overview of different types of metal purlins.

Z purlin

Z purlins are horizontal beams with a shape resembling the letter “z.” People may also call these “zee purlins.” Z purlins form the wall and roof joists of a building’s shell structure.

Z purlins are very strong. Their shape allows them to overlap, creating additional strength. Builders often rely on Z purlins when constructing large-scale structures because of their strength and durability.

The most significant benefits of a Z purlin include:

The ability to overlap the purlins, significantly increasing structural integrity
Strength and durability
Reduced purlin height, which can reduce material use

Contact the experts at Titan Steel Structures to determine which type of purlin is right for your project.

C purlins

C purlins (or “cee purlins”) are steel purlins that resemble the letter “c”. This type of purlin provides structural support for the beams required for a steel building’s floors and walls. In addition to being used for roof and wall beams, people also use C purlins as floor joists and to provide structural support in walls.

Some of the most significant benefits of C purlins include:

The ability to span length
No drilling or cutting is required during construction

C purlins and Z purlins can provide strength and durability in your steel building. However, choosing the right type of purlin for your project is important. Contact the steel structure experts at Titan Steel Structures to ensure you select the correct elements for your building.

Steel Purlin Finishes: Understanding the Differences

Steep purlins are available in two finishes. Understanding the differences between the finishes can help you choose the right type for your project.

Here is an overview of the types of steel purlin finishes.

Red oxide purlins

Red oxide purlins have a red oxide finish that protects the steel from environmental damage. The red oxide finish is a sprayed paint primer. The red color of this coating disguises the red color of rust.

Galvanized steel purlins

Galvanized purlins undergo a process where they are coated in zinc alloy plating. This plating protects the purlin from even the harshest conditions, including heavy rain, salt water, and chemical exposure.

There is no difference between the structural integrity of galvanized and red oxide purlins.

Metal Purlin Span, Spacing, and Laps

When constructing a steel building, it is important to be aware of the purlin span, laps, and spacing. Here is a quick overview of those terms.

Purlin span

The span is the length between the center of the bolts on each purlin.

Purlin laps

This term describes the overlap of purlins. A wide structure may require multiple purlins to overlap. Generally, purlin laps should make up about 15% of the span.

Purlin spacing

This term refers to the space between purlins on the roof’s slope. The structure’s weight and size, among other factors, will determine correct purlin spacing.

Correct span, spacing, and laps are critical to the structural integrity of your building. Contact the team at Titan Steel Structures to learn more.

Get a Quote Now

If you are considering constructing a metal building, you need expert guidance. Contact the knowledgeable specialists at Titan Steel Structures now to get a customized quote on your project.

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