A purlin, also historically known as purline, purloyne, purling, or perling, serves as a critical structural component in roofs. It is a longitudinal, horizontal member that provides structural support, often positioned beneath the roof. Supported by either the building’s rafters or walls, purlins are horizontal beams or bars frequently utilized in metal buildings. In wood-frame structures, they can also serve as substitutes for closely spaced rafters.
These purlins bear the weight of the roof deck, which comprises wooden panels, plywood, or sheet metal forming the roof surface. This deck is typically sealed with weatherproofing materials and often includes insulation.
Purlins come in various types, categorized based on their material composition and shape. They are employed for diverse purposes, including supporting structural walls or floors. Their significance lies in providing a frame for the roof sheeting to rest upon, thereby making them indispensable to the roof structure.
Purlins in Steel Structures
In steel structures, purlins are roof framing members that run parallel to the eaves of a building and support the roof slab or panels. Purlins are supported by rafters or walls. Purlins are widely used in metal buildings, where Z-shaped purlins allow for curved continuity between spans.
In order to make it easier to remember the names of structures, the steel industry uses shorthand descriptions in drawings and documents to name representative structural shapes: channel sections without flange stiffeners are usually called C-shaped or also U-shaped; purlins shaped like the letter Z are called Z-shaped purlins.
Some names may vary from country to country. In steel buildings, roof purlins and secondary members such as wall and partition support are generally made of cold-formed steel C, Z or U profiles.
Since secondary members are not primary load-bearing structural members, cold-formed structural profiles can be used, which are lighter than rolled profiles, which can improve efficiency. In addition, C Z U profiles can be shipped in bundles and, on buildings, form continuous beams spanning multiple supports.
C Purlin and Z Purlin
C Purlin
C-Purlin, so named because of its shape like the letter C, is mainly used to support roof panels and wall panels. C-Purlin or CEE-Purlin is used to shape the beams used in the secondary structural members of the building structure. This type of purlin is also used interchangeably with door installations, roof clips, window trims, parapet railings and side rails.
C purlins have similar extensions at both ends so that they can be used for single span applications. They are independent, safe, and very easy to install and manage, while providing stable support in steel buildings.
Z Purlin
Z-type purlins are also a common type of purlins. Compared with C-type purlins, they are stronger and can be used together at joints and overlaps. Z-type purlins are a type of horizontal beam that is widely used in the construction industry. They are mainly used to support the roof and walls of building structures. These purlins are installed under the roof panels or wall panels, supporting the roof panels or wall panels, supporting the roof panels and wall panels and the sturdiness of the entire building. Z-type purlins are light in weight and have high flexibility. More importantly, the size can be customized. For this reason, these Z-type purlins are often used in industrial buildings and agriculture.
About purlin roll forming machine
Z-shaped purlin roll forming machine or C-shaped purlin roll forming machine are both grooved roll forming machines. You can produce Z-shaped purlins of various sizes by adjusting the rollers on the forming machine.
Read more: Purlin roll fomring machine
Now that you know about C-purlins and Z-purlins, if you want to get a quote for C-purlins and Z-purlin roll forming machines, as well as CZ purlin roll forming machines, Beenew machinery has 28 years of experience in roll forming machine manufacturing, and our team is happy to provide you with roll forming solutions. For more information on different types of roll forming machines, or if you are ready to buy, please contact our consultants today.
To provide you with a better quotation and accurately meet your requirements, you can prepare the following detailed information when you consult us. If you don’t have it, we can also provide our case for your reference:
- Which kind of roll forming machine you need?
- Profile drawing or sample's pictures
- Steel coil thickness and width
About Beenew Machinery
Beenew machinery provides a wide range of roll forming machines and suitable roll forming solutions for companies in industries such as sheet metal, steel structure construction, agriculture, warehousing, stadiums, manufacturing, etc. Our products include:
- Roofing roll forming machine
- Purlin roll forming machine
- Curving machine
- Bending machine
- Decoiler(uncoiler)
All of Beenew machinery’s roll forming machines are professionally manufactured in China. Our goal is to provide forming machines with the best roll forming solutions, the best design, and the best quality to bring the greatest production benefits to our customers.
Hotline:+8618959261060(WhatsApp/Wechat)
Email:vin@beenewmachinery.com
Factory:No.5, Fuming Road, Tong’an Dstrict,Xiamen City,China
