Purlins

Pioneers in the industry, we offer mild steel purlin, galvanized c purlins, 3 mm c purlin, module mounting structures and roof mounted solar structure from India.

Purlins are manufactured using cold-roll forming technology, which shapes thin steel sheets into C or Z profiles. This process uses a series of rolling stands to gradually form the metal strip after it has been uncoiled, levelled, and pre-cut. Online punching occurs after the forming stage to create holes for fasteners, and the final products are strong, lightweight, and require less on-site modification due to their precise dimensions.

Table of Content

• Features of Purlins

• Manufacturing process overview

• Key aspects of purlin manufacturing

• Specifications

Features of Purlin in India

Purlin in India is generally cold formed purlins and girts, being efficient and economical structural members suitable for a wide range of building applications. We considered as the best purlin manufacturer which offers a full range of section depths ranging from 50mm up to 350mm deep for 'C' Purlin and from 100mm to 300mm deep for 'Z' Purlin.Various organization prefer LCP as best purlin supplier in India and overseas.

• High tensile steel - for high strength and low weight.

• Available in varied Zinc coating -Z120 GSM, Z180GSM & Z275 GSM in accordance with AS 1397.

• Full range of Accessories - from brackets to bolts to ensure easy use and installation.

• Full size range - for ease of design in both C & Z sections.

• Available in standard (240 MPa/ 345 MPa) and non-standard yield strength.

• Designed in accordance with AS 1538 and also conforms to BS 5950 and IS 875.

• Downturn* lip available - For those projects requiring this feature.

• Special size capability*- non-standard range of special shapes and channels available to suit individual requirements subject to minimum oder quantity and lead time.

Manufacturing process overview

• Uncoiling: The process begins with a hydraulic decoiler that unwinds large coils of steel.

• Leveling and pre-cutting: The steel strip is then fed through a leveling unit to remove any imperfections before being pre-cut to a basic length.

• Roll forming: The material enters a roll forming machine with multiple rolling stands. Each stand progressively shapes the steel strip into the desired C or Z profile.

• Online punching: After the profile is formed, an inline punching station uses hydraulic cylinders to create pre-punched holes for fasteners, which reduces the need for drilling at the construction site.

• Adjusting and final cutting: The purlin's profile is adjusted to ensure accuracy. The finished purlin is then cut to the final custom length.

Key aspects of purlin manufacturing

• Materials: Purlins are made from hot-rolled (HR), cold-rolled (CR), galvanized (GP), or galvalume (GL) steel.

• Technology: Cold roll forming is the primary manufacturing technique because it is efficient and allows for high-precision, consistent dimensions.

• Customization: Manufacturers can customize the purlin's length and create pre-punched holes to meet specific project needs, leading to faster installation and less waste.

• Quality control: Reputable manufacturers ensure compliance with industry standards like IS codes, which helps guarantee the structural integrity of the purlins.

Specifications

LCP C & Z Purlins and LCP Girts are manufactured from G240 MPa, G345 MPa Steel ranging from 1.6mm thick to 3.15mm thick) with a minimum Z120 galvanized coating (120g/m2) and a maximum of Z275 galvanized coating (275g/m2). All purlins and girts shall be LCP C & Z Purlin sections, supported by submission of effective section properties, purlin capacity calculations and a performance warranty, produced and detailed for this project.

All cold-formed sections conforming to AS 1397 (or equivalent), with zinc coating from Z120 (120g/ m2) to zinc coating of Z275 (275g/ m2) having a minimum yield strength of 240 MPa to maximum yield strength of 345 MPa. All sections should be installed in accordance with the manufacturer’s instructions with particular regard to bolt locations on both web and flanges and lap sizes of 15% span. For more information on appropriate purlin section and other coatings, please contact LCP Building Products Pvt. Ltd., Technical Department.

Direct contact between galvanized LCP C & Z Purlin with other dissimilar material, for example copper pipe (bi-metallic corrosion) or treated timber (chemical corrosion) must be avoided to prevent premature corrosion.