C Purlin Span Table

One of the most crucial instruments in architecture is the purlin. This is a type of horizontal beam that supports a building's structure, usually the roof. Typically, the building's walls support the purlins themselves. Although they are frequently seen in metal buildings, they are also occasionally found in wooden-framed constructions. Purlins are available in many sizes and varieties. 

Building walls and roofs are supported by C-Purlin steel beams, a kind of structural steel. They come in a range of sizes and thicknesses and are formed like the letter "C". 

Usually composed of either cold-rolled or hot-rolled steel, C-Purlins are finished with a coating that resists corrosion. They can be utilized in many different building applications and are simple to install.

Overview

It is a long, horizontal beam that resembles the letter C, as implied by the name. Walls and floors are supported by the C purlin. It can be used for a variety of structures, including verandahs, industrial buildings, garages, and other constructions requiring strong, long-lasting steel framing. 

In addition, it is utilized in door framing, window trimming, and roof trimming. They have a homogeneous construction, making them easy to handle and allowing for increasing length. It offers dependable support and is simple to set up.

These are some benefits of C purlins.

• There is no need to drill or cut on the side.
• Sturdy and dependable
• Reduced weight
• Easy to install
• Cheaper than structural steel

Choosing the Right Size

Purlins are available in different sizes and installation methods. The selection of the purlin will be influenced by these criteria. 

• Single Span System: One purlin runs the entire length of the structure in a single span system.
• Double Purlin Span System: The center and ends of two purlins are supported.
• Double Lapped System: To add extra support, the two purlins slightly overlap in the middle.
• Continuous Lapped: A sequence of identically spaced supporting purlins in the middle supports the purlins at both ends.

Once you understand the layout, consider the necessary number of purlins. Keep in mind that purlins are typically spaced 16 inches apart, which will affect the quantity needed. After determining the purlin system, it's time to select the appropriate purlin size. The available options are:

• A 4-inch purlin can cover a span of 12 feet
• A 6-inch purlin can cover a span of 18 feet
• An 8-inch purlin can cover a span of 25 feet
• A 10-inch purlin can cover a span of 30 feet

With this knowledge, measuring and choosing the appropriate purlin size should be simple. After that, they could be put in place and support the roof.

Bridging must be installed for all "Z" or "C" 100 purlins whenever they span more than two meters, for all 150 purlins whenever they span more than three meters, and for all 200, 250, and 230 purlins whenever they span more than four meters, while keeping in mind industry standards and fundamental safety recommendations.

150 C Purlin Span Table