C-Purlin Spec Sheet (PDF)
Full dimensional range, gauges, and tolerance reference in a single downloadable sheet.
Download Spec Sheet
Custom Roll-Formed Structural Profile
C-Purlin
A C-shaped structural steel section, cold roll-formed to frame and support roof and wall systems.
Custom lengths, gauges, and finishes — roll-formed to your drawing, not pulled from generic stock.
50–100 mm
Flange Width
100–300 mm
Web Depth
1.6–3.0 mm
Gauge Range
Up to 12 m
Standard Length
Overview
Our Capabilities
The C-Purlin is a cold roll-formed, C-shaped steel section with inward lips that improve stiffness and resistance to twisting. It is used to support roof sheeting, wall cladding, and purlin-to-rafter systems in sheds, warehouses, solar structures, and PEBs. Its lipped design provides better strength-to-weight efficiency than plain channels. Every C-Purlin is formed to your drawing, including width, depth, gauge, hole pattern, and finish.
See Full SpecificationsCustom Roll-Forming
Every profile is roll-formed to your specified width, depth, gauge, and length — not pulled from generic stock.
In-Line Punching
Bolt-ready hole and slot patterns are punched in-line, so sections arrive ready for site erection.
Finish & Coating
Galvanized and pre-painted finish options protect the section for its full service life on site.
Key Features & Benefits
Built for Purlin Framing Performance
High Strength-to-Weight Ratio
The lipped-flange geometry resists local buckling and twisting, letting the section span further per kilogram of steel than a plain channel.
Coil-Fed Dimensional Consistency
Continuous roll-forming from coil holds tight, repeatable dimensions across an entire production run, not just the first few pieces.
Pre-Punched Bolt Patterns
Hole and slot patterns for purlin-to-rafter connections can be punched in-line, so sections arrive ready for bolted site erection.
Corrosion-Ready Finishes
Available in galvanized and pre-painted finishes so the section is protected for its service life before it ever reaches site.
Purpose-Built vs. a Plain Lipped Channel
Flange width, lip depth, and hole spacing are optimized specifically for roof and wall purlin bracing — not a general-purpose bracing section pressed into service.
Formed to Your Drawing
Width, depth, gauge, hole pattern, and finish are set by your specification — not selected from a fixed, one-size-fits-all stock range.
Applications & Industries Served
Where the C-Purlin Is Used
Real installation contexts, not generic one-liners — each application notes the function the profile performs.
01
Industrial Shed & Warehouse Roofing
Spans between rafters and trusses to carry roof sheeting loads across large clear-span structures.
02
Pre-Engineered Buildings (PEB)
Standard secondary framing member for wall girts and roof purlins in bolted PEB systems.
03
Solar EPC Mounting Structures
Forms the purlin bracing for ground-mount and rooftop solar array framing.
04
Cold Storage & Warehousing
Lightweight, corrosion-protected framing for insulated panel and cladding systems.
05
Agricultural & Poultry Sheds
Economical, high-span roof framing where material efficiency drives project cost.
06
OEM Equipment Framing
Structural framing member for equipment enclosures, canopies, and skid structures.
Construction & Infrastructure
Solar EPC
Pre-Engineered Buildings
Warehousing & Logistics
Agriculture
OEM Manufacturing
Technical Specifications
Specs We Roll-Form To
| Spec Field | Range / Notes |
|---|---|
| Flange Width | 50 – 100 mm (confirm exact range per drawing) |
| Web Depth (Height) | 100 – 300 mm |
| Lip | 15 – 25 mm |
| Length | Standard stock length up to 12 m, plus custom cut-to-length |
| Thickness / Gauge | 1.6 – 3.0 mm |
| Material Grade | IS 2062 Gr. A / Gr. B, ASTM A653, or customer-specified grade |
| Standard vs. Custom Length | Standard stock length + custom-cut-to-length on request |
| Weight per Metre | ≈ 2.5 – 9.0 kg/m, depending on size and gauge combination |
| Tolerance Reference | EN 10162:2003 / IS:852-1985 — see Tolerance & Standards below |
Figures above are representative ranges for layout reference. Exact dimensions are confirmed against your structural drawing or specification at enquiry stage.
Engineering / Section Properties
Section Properties for Structural Design
As a structural profile, the C-Purlin carries engineering section data so it can be specified correctly for span and load.
| Size (H × W × t) | Ixx (cm⁴) | Zxx (cm³) | Radius of Gyration rxx (cm) |
|---|---|---|---|
| 100 × 50 × 1.6 mm | 74.3 | 14.9 | 3.68 |
| 150 × 65 × 2.0 mm | 215.6 | 28.7 | 4.92 |
| 200 × 75 × 2.5 mm | 468.2 | 46.8 | 5.87 |
Representative values for illustration only. Confirm exact section properties and load-span (UDL/deflection) data for your specified size with our technical team.
/ Material & Finish Options
Grades & Coatings
Request a Quote
Grades & Coatings
Available
Request a Quote
Mild Steel — IS 2062, Galvanized — ASTM A653 / IS 277, Pre-Galvanized Coil, and Stainless Steel available on request.
GI Coating 60–275 GSM, Pre-Painted / Color-Coated, and Powder-Coated finishes available on request.
Non-standard grades and finishes can be discussed and sourced on request.
Tolerance & Standards
Numeric Tolerances We Hold
Referenced against EN 10162:2003 and IS:852-1985.
| Category | Tolerance |
|---|---|
| Thickness | ± 0.10 mm (t ≤ 2.0 mm) · ± 0.15 mm (t > 2.0 mm) |
| Cross-Sectional Dimensions | ± 1.0 mm (up to 100 mm) · ± 1.5 mm (above 100 mm) |
| Straightness | ≤ 2 mm per metre length |
| Torsion | ≤ 1.5° per metre length |
| Length | ± 3 mm (cut lengths up to 6 m) · ± 5 mm (above 6 m) |
| Angle | ± 1° |
Values shown are indicative placeholders for layout reference, pending final confirmation against EN 10162:2003 / IS:852-1985 by the engineering team before publishing. ISO 9001:2015 certified — certificate number to be published here.
Our Process
Learn More
Our process starts with your drawing and continues through dispatch, guided by tight tolerances and roll-forming expertise.
Send your structural drawing or specification — size, gauge, hole pattern, and finish. We confirm feasibility and lead time before production starts.
Coil is roll-formed to your exact profile on our line, with bolt-ready holes and slots punched in-line to your pattern.
Every run is dimensionally checked against your drawing, then bundled, strapped, and dispatched by truck freight.
Downloadable Resources
Take This Back to Your Team
CAD / Drawing Files
DWG/DXF section files are available on request once your specification is confirmed.
Request CAD FileCompany & Capability Brochure
Facility capacity, process overview, and full profile catalogue in one document.
Download Brochure
Other Profiles We Roll-Form
Explore the Full Capability Range
Not an upsell — a look at the breadth of sections we can roll-form alongside the C-Purlin.
/ Case Studies
Where This Has Been Used
Sample entries shown for layout reference — to be replaced with confirmed project case studies from the shared case-study bank.
Project photo
Solar EPC
500 kW Ground-Mount Solar Project, Gujarat
Roll-formed C-Purlins to project-specific length and hole spacing for a ground-mount racking structure, supplied ready for bolted on-site assembly.
Project photo
Warehousing
Industrial Warehouse Roofing Frame, Ahmedabad
Formed custom-length galvanized C-Purlins as secondary roof framing for a 40,000 sq. ft. shed, pre-cut to eliminate on-site trimming.
Project photo
Agriculture
Poultry Shed Structural Framing
Supplied lightweight C-Purlin sections for a large-span agricultural shed roof, optimized for cost-efficient material usage.
FAQ
Common Questions About the C-Purlin
Yes. Standard stock length runs up to 12 m, but every run is roll-formed to order — share the length you need, including non-standard or cut-to-size lengths, and we will confirm feasibility and lead time.
Minimum run length depends on the gauge and hole/slot tooling required for your specification. Share your drawing and quantity and our team will confirm a minimum run size for your project.
Yes, client-supplied coil is accepted. Share the coil grade, gauge, and width and we will confirm compatibility with our roll-forming line before scheduling the run.
A standard specification using existing tooling generally runs faster than a non-standard profile requiring new tooling and first-article samples. Exact lead time is confirmed at enquiry once your specification is set.
We hold tolerances referenced against EN 10162:2003 / IS:852-1985 — see the Tolerance & Standards section above. Tighter, application-specific tolerances can be discussed on request.
Sections are bundled and strapped for transport and delivered by truck freight. Let us know your site access constraints and we will confirm a packaging and delivery plan.
Get in Touch
Ready to Roll-Form Your C-Purlin?
Send your drawing or specification and our technical team will confirm size, tolerance, run size, and delivery timeline for your project.
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