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Precision Roll-Formed C and Z Purlins for Secondary Steel Framing

Precision roll-formed C and Z purlins are lightweight secondary framing components designed to support roof sheets, wall panels and building-envelope systems. Manufactured from high-quality steel coils, they provide an efficient combination of structural strength, dimensional consistency and easy installation.
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Our C and Z sections can be supplied with customized profiles, thicknesses, lengths, hole patterns and surface finishes. Pre-punched connection holes and clearly marked components help reduce on-site processing and improve installation efficiency.

From individual purlin orders to complete secondary framing packages, we provide factory-direct manufacturing for warehouses, industrial plants, logistics centers, agricultural buildings and prefabricated steel projects.

CZ Purlin (10)

Product Range

C-Shaped Steel Purlins

C sections have a uniform channel-shaped profile and are widely used for simple-span roofing, wall girts, door frames and secondary structural supports. Their symmetrical shape makes positioning and connection convenient.

Z-Shaped Steel Purlins

Z sections feature an offset profile that allows adjacent members to overlap above the primary frame. This lapping arrangement improves structural continuity and makes Z purlins suitable for multi-span roofing systems.

Roof Purlins

Installed horizontally between primary roof frames to support roofing sheets, insulation and other roof-system components.

Wall Girts

Installed between steel columns to support exterior wall panels and transfer wall loads to the main structural frame.

Customized Framing Sections

Special profiles, hole layouts, end cuts, reinforcing plates and connection details can be manufactured according to approved drawings.

CZ Purlin (7)

Technical Specifications

Item Standard Supply Range
Section Type C section or Z section
Production Method Continuous cold roll forming
Raw Material Carbon steel coil or galvanized steel coil
Web Height 80–350 mm or customized
Flange Width 40–100 mm or customized
Lip Size 10–30 mm or customized
Steel Thickness 1.5–3.5 mm or customized
Member Length Customized, normally up to 12 m
Hole Type Round, slotted, oval or customized
Hole Processing Online punching or CNC processing
Surface Option Galvanized, painted or untreated
Connection Type Bolted connection
Identification Printed, tagged or bundled by installation area
Packing Method Nested bundles with steel straps
Custom Service Profile, length, holes, coating and labeling

CZ Purlin (3)

C and Z Section Selection

Project Requirement Recommended Section
Simple-span roof framing C purlin
Continuous multi-span roofing Z purlin
Steel building wall girts C or Z section
Door and window framing C section
Overlapped support connections Z section
Secondary equipment supports C section
Long building roof systems Z section
Customized framing details Selected according to design

Production Process

  1. Review customer drawings and specifications

  2. Confirm section dimensions and material requirements

  3. Inspect steel coils before production

  4. Level and feed the steel coil

  5. Form the required C or Z profile

  6. Punch connection holes according to drawings

  7. Cut each section to the specified length

  8. Inspect dimensions, holes and straightness

  9. Apply identification marks and labels

  10. Nest, bundle and prepare the products for shipment

Quality Inspection

Quality control is performed throughout the production process, including:

  • Raw-material certificate verification

  • Steel thickness inspection

  • Zinc-coating inspection when applicable

  • Web and flange dimension measurement

  • Lip-size and profile-angle inspection

  • Section straightness verification

  • Member-length inspection

  • Hole diameter and location checks

  • Surface-quality inspection

  • Bundle quantity and label verification

FAQ

1. Can you produce non-standard C and Z profiles?

Yes. Web height, flange width, lip size and material thickness can be customized according to your drawings and structural requirements.

2. Can the connection holes be punched during production?

Yes. Round, slotted, oval and customized holes can be processed according to approved drawings.

3. Can different purlin lengths be included in one order?

Yes. We can manufacture multiple lengths and label them according to drawing number, building area or installation sequence.

4. Are galvanized purlins available?

Yes. Galvanized steel-coil options are available for projects requiring additional corrosion protection.

5. Can you supply both roof purlins and wall girts?

Yes. We can supply C and Z sections for roof and wall systems as part of one complete secondary framing package.


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 Telephone: +86-151-2258-2058
 WhatsApp:  +8615122582058
 Email: sales@zsjhsteel.com
 Address: China,Tianjin