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I profile and cee purlin for sale

I-profile, also called steel beam, is a long strip of steel with an I-shaped cross section.

◆Representative method

16# I-profile, the specification is 160 (height) x 88 (leg width) x 6.0 (waist thickness), I-beam is divided into A and B from 20# to 63#, and there is The specific parameters of the three I-beams of C, A, B, and C are different. According to the representation method of I-beam, the corresponding parameters are used, mainly based on height, leg width, and waist thickness.

◆Application performance

① I-profile, with high strength and toughness, are often used to bear the main force-bearing parts of steel structures. I-beams have stable performance and are generally processed.

Such as cold bending, cutting, welding, etc. can be combined into a steel structure body, and the standard specifications of I-beams have been used in a wide range of steel structure projects.

② I-profile (Q345) low-alloy material, its strength, toughness, plasticity, corrosion resistance and weather resistance are stronger than ordinary carbon materials, generally used in higher force requirements, or higher plasticity requirements, or relatively special Environment operation, such as low temperature, highly corrosive environment, etc.

◆Product classification

Ordinary I-profile, Light I-profile


Q235 (A, B), Q345 (A, B)

◆Main purpose

profile are widely used in various steel structure workshops, bridges, tunnel construction, road construction, large-scale construction projects, large-scale mechanical equipment such as lifting equipment, etc.

I-profile are mainly divided into ordinary I-beams, light I-profile and wide-flange I-profile. According to the height ratio of the flange to the web, it is divided into wide, medium and narrow wide flange I-beams. The specifications produced by the former two are No. 10-63, that is, the corresponding height is 10 cm-63 cm. At the same height, the light I-beam has narrow flange, thin web and light weight. The wide-flange I-beam is also called H-beam. The cross section is characterized by two legs parallel and no slope inside the legs. It is an economical section steel, which is rolled on a four-high universal rolling mill, so it is also called "universal I-beam". Ordinary I-beams and light I-beams have become national standards.

I-beam, also known as steel beam, is a long strip of steel with an I-shaped cross section. I-beams are divided into ordinary I-beams, light I-beams and H-beams. I-beams are widely used in various building structures, bridges, vehicles, brackets, machinery, etc.

Ordinary I-steel and light I-steel flanges are thicker at the web and thinner at the outside; H-steel: HW HM HN HEA HEB HEM and other I-steel flanges are of constant cross-section

Ordinary I-beams and light I-beams have formed national standards. Ordinary 10# I-beams are equivalent to international I100 (for example, 10# channel steel is equivalent to channel steel U100) (because the standards implemented by various countries are different, resulting in their specifications vary slightly)

Scope of application:

Ordinary I-beams and light I-beams have relatively high and narrow cross-section dimensions, so the moment of inertia of the two main sleeves on the cross-section is quite different. curved members or form them into lattice-type stressed members. It is not suitable for axial compression members or members with bending perpendicular to the web plane, which limits its application range. The use of I-beams should be selected according to the requirements of the design drawings.

In architecture, structural engineering, or construction, a purlin (or historically, purlin, purlin, purlin, purlin) is a horizontal beam or rod used for the structural support of a building, most commonly found on roofs. Purlins are supported by the rafters or walls of a building. They are most commonly used in metal buildings, although they sometimes replace closely spaced rafters in wood frame construction.

The purlins of the roof support the weight of the roof deck. Roof decks are panels of wood, plywood, or metal that form the surface of a roof. When made of wood, it is usually covered with some kind of weatherproof material and sometimes with insulation.

Several types of purlins exist. They are divided into several categories according to the material and shape from which they are made. Different purlins are used for different purposes, including structural support for walls or floors. Purlins are important because without them, the sheets on the roof would have no frame to support them, making purlins vital to the roof's structure.

Purlin material

wooden purlins

Wooden purlins are suitable for use with fiber cement boards. Wooden purlins and sheets work well together to ensure the room below is breathable and securely stores anything you need to keep safe in the room, from livestock to grain or other organic materials.

However, purlins are made of wood and can rot. Also, the main problem with wood is that it dries out as it goes up. Therefore, it is best to dry it before installation. Additionally, moisture can significantly add weight leading to sagging.

steel purlin

Steel purlins are a direct replacement for wooden purlins. They are lightweight, dimensionally stable, accurate and straight. They expand and contract reasonably during extreme temperature changes.

Steel purlins are usually made of cold-formed steel that is thin enough to pass screws through. Cold-formed steel sections are made by rolling or pressing thin steel sheets into the desired shape. For fabricators, it is cheaper than hot-rolled steel and easier to work with. While cold-formed steel is stronger than hot-formed steel, it breaks more easily under stress than bending.

Purlins are made of coated hot-dip galvanized steel in line with other common light steel building products. This provides good protection in most exposed interior environments. Runoff or contact with materials incompatible with zinc should be avoided.

In order to protect the purlins, they also applied a layer of paint on the outside of the purlins. The combination of zinc and paint (synergistic effect) produces approximately 2 times the corrosion protection of the sum of the corrosion protection provided by each individually.

A detailed introduction and comparison of purlins will be presented in the next section. Understanding the increasing importance of purlins in building works, Chinh Dai Steel has been perfecting our technology to provide the highest quality c-channel and z-channel purlins.

Purlins and Belts


23rd, Floors, Science and Technology Finance Buildling. No.5, Meiyuan Road, Xiqing District, Tianjin,China.


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