What steel specification is used for Paneltech Z & C purlins?

All Paneltech Z and C sections are manufactured from premium hot-dipped galvanized high-tensile steel compliant with BS EN 10346:2015. The steel features a standard Z275 zinc coating (275 g/m² total double sided) and a certified minimum yield strength of 450 N/mm² (450 MPa), ensuring exceptional load-bearing performance and dependable corrosion protection.

What is the structural difference between Z and C purlins?

Z-sections are designed with different flange dimensions, allowing them to lap together over internal supports in continuous multi-bay structures. Lapping doubles section thickness at points of maximum bending moment, significantly boosting structural capacity and allowing longer spans with lighter gauge steel. C-sections are symmetric and are primarily specified for single spans, unlapped spans, eave purlins, and wall girts around door and window trimmers.

Can purlins be supplied pre-punched with connection holes?

Yes. Our automated roll-forming lines feature high-speed inline CNC punching systems. Connection holes (standard 14mm, 18mm round holes or elongated slots) can be punched accurately at any pitch along the web and flanges according to your structural fabrication drawings, minimizing on-site drilling and accelerating erection time.

What are the standard lead times and maximum lengths available?

Because all forming and processing occur in-house at our Barka factory, standard orders can typically be produced within short turnarounds. Purlins can be custom roll-formed to precise required lengths up to 14 meters, subject to transport and logistics capabilities.

Galvanized Steel Z & C Purlins Manufacturer in Oman

Precision Roll-Formed Profiles

High-Tensile Galvanized Purlins & Girts

Paneltech International LLC manufactures an extensive portfolio of high-precision structural C and Z purlins, roof girts, and eaves framing for industrial warehouses, pre-engineered steel buildings (PEB), aircraft hangars, commercial canopies, and agricultural developments. Manufactured at our state-of-the-art facility in Barka, Sultanate of Oman, our structural cold-formed profiles provide unmatched load-to-weight efficiency, superior dimensional consistency, and lasting corrosion resistance.

Supplied plain or fully custom pre-punched with elongated and round holes on automated multi-tool punching lines, our cold-formed sections eliminate on-site cutting, measuring, and re-drilling errors. The crisp, square corner radii and accurate roll-formed profiles ensure rapid bolt-up assembly on site, significantly compressing structural steel erection schedules while strictly complying with international structural design codes.

Technical Summary & Standards

Standard Steel Grade BS EN 10346:2015 / S450GD

Minimum Yield Strength 450 N/mm² (450 MPa)

Protective Zinc Coating Hot-Dipped Z275 (275 g/m²)

Profile Depth Range 100 mm up to 350 mm

Material Thickness 1.2 mm to 3.0 mm

Hole Punching Option CNC Inline (14mm / 18mm / Slotted)

Manufacturing Location Barka, Sultanate of Oman

Structural Geometry

Z-Section vs. C-Section Applications

Engineered cold-formed geometry optimized for roof purlins, side wall girts, door headers, and mezzanine floor joists.

Continuous Span Framing

Structural Z-Purlins

Z-sections are engineered with asymmetric top and bottom flange widths, enabling identical profiles of the same depth to nest and lap neatly together over intermediate portal frame rafters. In multi-bay commercial and industrial steel structures, continuous lapping doubles the steel thickness over supports, substantially increasing bending capacity and reducing both structural deflection and overall steel tonnage.

Ideal for continuous, lapped spans in multi-bay roofs and cladding walls
Achieves high load-bearing capacity with lighter base metal thickness
Eliminates rafter moment overload via reinforced double-thickness lap joints

Simple Span & Girt Framing

Structural C-Purlins

C-sections feature uniform symmetric flanges with returned stiffening lips, providing exceptional axial rigidity and structural stability. Although C-sections cannot be nested or lapped across continuous spans, their clean rectangular geometry makes them the premier choice for simply supported single spans, eaves struts, end-wall girts, door frames, window trimmers, and floor header beams where flush face fixing is critical.

Perfect for single-span bays, gable frames, and standalone roof verandas
Provides flush surface alignment for perimeter flashing and fascia panels
High torsional stability during construction handling and fastening

Standard Design Dimensions

Profile Dimensions & Designations

Paneltech utilizes an internationally recognized designation system: Section Depth (mm) + Profile Type (Z or C) + Thickness (mm × 10). Example: 232 Z 18 designates a 232 mm deep Z-purlin with 1.8 mm thickness.

Section Code	Profile	Depth (mm)	Flanges (mm)	Lip (mm)	Thickness (mm)	Weight (kg/m)	Yield Strength
142 Z 15	Z-Section	142	58 / 52	14.5	1.5	3.15	450 N/mm²
172 Z 18	Z-Section	172	65 / 59	16.0	1.8	4.52	450 N/mm²
202 Z 20	Z-Section	202	68 / 62	17.0	2.0	5.62	450 N/mm²
232 Z 18	Z-Section	232	72 / 64	18.0	1.8	5.48	450 N/mm²
232 Z 25	Z-Section	232	74 / 66	19.0	2.5	7.55	450 N/mm²
262 Z 20	Z-Section	262	76 / 68	19.5	2.0	6.78	450 N/mm²
150 C 15	C-Section	150	60 / 60	15.0	1.5	3.32	450 N/mm²
200 C 20	C-Section	200	70 / 70	18.0	2.0	5.88	450 N/mm²
250 C 25	C-Section	250	75 / 75	20.0	2.5	8.12	450 N/mm²

Manufacturing Capabilities

Why Specifiers & EPC Contractors Rely On PTI

Strict quality assurance and flexible fabrication guarantee trouble-free structural assembly on international project sites.

Automated CNC Punching

High-speed in-line punching heads execute round and elongated holes on webs and flanges simultaneously, following exact connection gauge lines and bolt pitch requirements.

Certified Galvanizing

Manufactured exclusively from certified hot-dipped zinc-coated coils (Z275 standard, with optional heavier coatings upon request), shielding members against extreme desert heat and coastal marine exposure.

Custom Lengths to 14m

Roll-formed to precise schedule cut lengths up to 14 meters. Custom bundle packing with waterproof wrapping safeguards members during road transit and containerized ocean shipping.

Technical Support

Frequently Asked Questions

Answers to common questions regarding structural selection, punching configurations, and regional standards.

What steel grade and coating standards are used for Paneltech purlins?

All Paneltech Z and C sections are manufactured from premium structural hot-dipped galvanized steel coil complying with BS EN 10346:2015. We utilize steel grade S450GD with a guaranteed minimum yield strength of 450 N/mm² (450 MPa) and a minimum zinc coating mass of Z275 (275 g/m² total both sides). Higher coating masses and custom grades are available upon consultant request.

How do lapped Z-purlins achieve material savings compared to single-span designs?

Due to the asymmetric flange profiles of our Z-sections, adjacent purlins nest inside one another across internal rafters. By lapping members over support cleats (typically 10% to 15% of the total span length), the combined double section effectively doubles bending resistance where negative moments are highest, allowing structural engineers to specify thinner gauge steel across larger column grids.

Can Paneltech provide custom punching schedules for connection cleats?

Yes. Our Barka roll-forming lines feature integrated multi-tool CNC punch presses. We can punch standard 14mm or 18mm round holes and elongated slotted holes (for expansion and structural alignment) precisely positioned according to your fabrication drawings, eliminating manual field layout and torch cutting.

What documentation is provided with project deliveries?

Every shipment is backed by factory test certification, EN 10204 Type 3.1 Mill Test Certificates verifying base metal chemical composition, yield strength, tensile elongation, and zinc coating thickness, alongside our comprehensive handling and storage guidelines.

Request a Structural Purlin Schedule & Commercial Proposal

Whether you require design load verification, profile recommendations, or direct mill-rate quotations for export and regional supply, our technical structural team in Barka is prepared to support your project.

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