To optimize structural dead weight, thermal envelope efficiency, and fire safety ratings, our galvanized C purlins interface seamlessly with our full spectrum of modular industrial building components.
In the structural engineering domain of modern industrial architecture, secondary framing accounts for up to 35% of total steel structure weight while directly dictating roof diaphragm stability, purlin-to-rafter force transfers, and exterior envelope integrity. Galvanized C Purlins (also recognized under Turkish technical designations as C-Aşık Profili or Hafif Çelik C Kesitler) serve as critical horizontal load-bearing members that transfer roof dead loads, snow accumulation, wind uplift pressures, and suspended utility arrays straight into primary portal frames or reinforced concrete rafters.
Unlike conventional hot-rolled structural steel shapes like UPN channels or IPE beams, cold-formed galvanized C purlins are fabricated from continuous hot-dip galvanized steel coils (yielding structural grades S280GD, S320GD, S350GD, and up to ultra-high tensile S550GD in accordance with EN 10346). Through cold continuous roll-forming lines, the flat sheet metal transitions into an engineered C-profile featuring inward returned lip stiffeners. These precise edge lips substantially increase the moment of inertia along the major flexural axis ($I_x$) and counteract local plate buckling phenomena under sustained compressive stress.
Our manufacturing protocol guarantees strict dimensional tolerances conforming to EN 10162 and structural verification based on Eurocode 3 (EN 1993-1-3: Cold-formed members and sheeting). By cold-rolling high-yield structural coils, we achieve a material strength-to-weight ratio that permits building designers to reduce overall structural superstructure self-weight by 35% to 50% compared to traditional hot-rolled profiles. This massive mass reduction yields exponential savings in primary frame tonnage, foundation footings, and baseplate anchorage requirements—a factor of paramount importance across the seismically active Marmara basin.
| Profile Designation (Depth × Flange × Lip) | Gauge Thickness (mm) | Cross-Sectional Area (cm²) | Nominal Weight (kg/m) | Major Inertia $I_x$ (cm⁰) | Yield Strength $f_y$ (MPa) | Standard Zinc Mass (g/m²) |
|---|---|---|---|---|---|---|
| C 100 / 50 / 15 | 1.50 - 2.50 | 3.15 - 5.08 | 2.47 - 3.99 | 51.2 - 79.4 | S320GD / S350GD | Z275 / Z350 |
| C 150 / 65 / 20 | 1.50 - 3.00 | 4.50 - 8.64 | 3.53 - 6.78 | 162.4 - 296.8 | S350GD | Z275 / Z450 / Magnelis |
| C 200 / 70 / 20 | 2.00 - 3.20 | 7.22 - 11.26 | 5.67 - 8.84 | 420.5 - 634.2 | S350GD / S550GD | Z275 / Z450 / ZM310 |
| C 250 / 80 / 25 | 2.00 - 3.50 | 8.82 - 15.02 | 6.92 - 11.79 | 812.0 - 1345.6 | S350GD / S550GD | Z275 / Z450 |
| C 300 / 100 / 30 | 2.50 - 4.00 | 13.25 - 20.80 | 10.40 - 16.33 | 1780.4 - 2710.2 | S350GD / S550GD | Z275 / Z450 / ZM310 |
*Custom flange widths (40mm to 100mm), web depths (80mm to 400mm), stiffener return angles, and automated CNC slotted hole patterns (Ø14mm, Ø18mm, oblong 14×25mm) are produced to millimetric precision based on project structural shop drawings.
From coastal humidity to extreme seismic shear demands, Istanbul presents distinct engineering challenges. Here is how our galvanized C purlin profiles excel in local operating environments.
Heavy manufacturing, metalworking, and chemical production zones in Tuzla Organized Industrial Zone (OSB) and neighboring Gebze Dilovası contend with severe industrial atmospheric pollution combined with high ambient humidity from the Gulf of İzmit (Corrosivity category C4/C5-M per ISO 12944-2). Our high-coating-weight galvanized C purlins (Z350 to Z450 g/m² or Zinc-Aluminum-Magnesium alloys) provide barrier and galvanic protection against sulfurous airborne acids, preventing premature micro-pitting along purlin connection flanges.
E-commerce mega-fulfillment centers, customs warehouses, and multimodal logistics parks around Arnavutköy, Çatalca, and Hadımköy encounter intense northern wind loads originating from the Black Sea (Poyraz). Our deep-web C250 and C300 purlins deliver superior section modulus against negative wind uplift forces without excessive mid-span deflection, maintaining complete airtight joint sealing for insulated composite roof sandwich panels.
Istanbul's municipal urban regeneration (Kentsel Dönüşüm) across İkitelli OSB, Dudullu, and Beylikdüzü frequently demands lightweight interior floor framing to create high-density warehouse storage without exceeding existing building column loads. Our galvanized C-sections serve as high-capacity secondary mezzanine floor joists supporting open composite steel floor deck systems, maximizing internal clear height while ensuring structural fire resistance.
Istanbul's geographic position straddling the active North Anatolian Fault (Kuzey Anadolu Fay Hattı) places its industrial superstructure under rigorous seismic safety protocols. Following the enactment of the Turkish Building Earthquake Code (TBDY 2018), structural engineering firms and general contractors in Istanbul are prioritizing seismic mass reduction, diaphragm stiffness, and non-linear dynamic drift control.
Galvanized cold-formed C purlins play an instrumental role in seismic mitigation strategies:
With operational origins established in 2010 and over 352 successful industrial projects executed, our integrated engineering, roll-forming, and export packaging offer verifiable reliability.
Our manufacturing plant operates high-speed multi-station cold roll-forming lines integrated with automated in-line CNC hydraulic punching units. We punch pre-engineered web holes, slotted clearance holes for cleat connection brackets, and flange penetrations at exact millimetric intervals, eliminating manual cutting, reaming, or drilling on Istanbul jobsites.
Nested C-profile bundle packaging optimizes container volume for deep-sea freight routed directly to Istanbul's deep-water ports (Kumport, Marport, Mardas at Ambarlı Port Complex on the European side, or Haydarpaşa on the Asian side). We apply waterproof anti-humidity vapor barrier wrapping and timber skid bracing to prevent transit white rust corrosion during maritime transit.
Leveraging 15+ years of engineering capability since 2010, our scope is not limited to bare steel rolling. We supply fully integrated building solutions—combining C purlins, galvanized open composite deck sheets, mineral wool fireproof panels, and secondary hardware under a single, accountable international commercial contract.
Critical engineering, compliance, and customs details regarding the procurement and site installation of cold-formed galvanized C purlins in Turkey.
Send your project blueprints, bill of quantities (BOQ), or profile schedules. Our structural engineering department will prepare optimized section sizing, nesting calculations, and a comprehensive CIF Istanbul commercial proposal.
