In addition to precision cold-roll-formed Z and C secondary purlins, our ISO-certified facilities manufacture and export complete structural steel frameworks, composite decking, and thermal envelope systems tailored to Israeli building codes.
Non-combustible core, flush tongue-and-groove jointing, designed for Israeli bio-tech, semiconductor & pharmaceutical facilities.
Clear-span rigid frames coupled with optimized continuous Z-purlins for high-wind Negev desert and Emek Hefer agricultural centers.
High-shear composite interlocking profiles, hot-dip zinc coating up to Z275/Z350, eliminating temporary props in high-bay builds.
UV-stabilized, weather-tight residential & municipal auxiliary storage engineered for rapid DIY site erection across kibbutzim.
High-cycle industrial track doors with wind-load reinforcement bars, built for Modi'in, Shoham & Ashdod port distribution docks.
Heavy-duty multi-tier structural mezzanine framing utilizing high-inertia cold-formed primary and secondary joist channels.
Class A1 non-combustible interior dry-lining boards, chloride-free formulation certified to prevent corrosion on structural metal framing.
Full-spectrum portal frame solutions pre-engineered with precision-lapped Z-purlins, wind bracing, and turnkey cladding packs.
In modern structural steel framing, cold-formed Z purlins represent the critical load-transfer mechanism bridging the primary portal frames and the external roof envelope. Through sophisticated asymmetric profile geometry, continuous lap nesting, and ultra-high-yield micro-alloyed steel substrates, our Z purlins deliver superior strength-to-weight ratios engineered to comply rigorously with Israeli and international standards.
Unlike simple-span C sections that rest end-to-end, our custom OEM Z purlins feature precisely dimensioned asymmetric flanges (e.g., 68mm top flange vs. 62mm bottom flange). This allows one section to nest tightly inside the adjacent purlin across the portal frame support.
By creating a continuous beam system with a 10% to 15% span overlap, the structural moment capacity over the interior supports is nearly doubled. This reduces peak mid-span deflections under gravity and wind suction loads by up to 38% compared to single-span configurations, allowing Israeli contractors to reduce structural steel tonnage without sacrificing structural safety.
We manufacture structural purlins utilizing prime structural steel certified to EN 10346 S350GD, S420GD, S450GD and ASTM A653 Grade 50/65. Elevated yield strengths ensure superior elastic section modulus ($Z_x$) and plastic bending resistance ($M_{pl,Rd}$).
For demanding environments, we provide heavy hot-dip galvanization (Z275, Z350, Z450, Z600) as well as advanced Zinc-Aluminum-Magnesium alloy coatings (e.g., PosMAC / Magnelis Zn-Al-Mg 3.0%). In high-salinity Mediterranean coastal belts such as Haifa and Ashdod, Zn-Al-Mg coatings establish a dense simonkolleite barrier that self-heals cut edges and punched bolt holes, delivering up to 5x longer service life than standard zinc coatings.
Dimensional accuracy is critical for continuous lap erection. Our fully automated multi-station cold roll-forming lines feature inline servo-driven hydraulic punch units capable of executing staggered web holes, elongated round slots for sag rods, and counter-sunk flange details.
With cut-to-length tolerances held within ±1.0mm and hole center deviations within ±0.5mm, on-site field drilling, reaming, or cutting is completely eliminated. Members integrate seamlessly with standard M12, M16, and M20 Grade 8.8 structural bolts, ensuring rapid assembly even during accelerated project cycles.
| Profile Designation | Web Depth (mm) | Flange Sizes (Top/Btm mm) | Gauge Range (mm) | Yield Strength ($R_e$ MPa) | Standard Zinc Coating | Recommended Span (m) | Key Applications |
|---|---|---|---|---|---|---|---|
| Z140 / OEM-14 | 140 | 50 / 45 | 1.5 – 2.0 | ≥ 350 / 450 | Z275 / PosMAC | 4.0 – 6.0 | Light agro-sheds, small warehouses, wall girts |
| Z180 / OEM-18 | 180 | 65 / 58 | 1.8 – 2.5 | ≥ 350 / 450 | Z275 / Z350 | 5.5 – 7.5 | Standard industrial workshops, commercial roofing |
| Z220 / OEM-22 | 220 | 72 / 65 | 2.0 – 3.0 | ≥ 350 / 450 | Z350 / PosMAC 310 | 7.0 – 9.5 | High-bay distribution centers, logistics depots |
| Z250 / OEM-25 | 250 | 75 / 68 | 2.0 – 3.2 | ≥ 450 | Z350 / Z450 | 8.0 – 11.0 | Heavy-snow Golan Heights roofs, solar PV mounts |
| Z300 / OEM-30 | 300 | 85 / 75 | 2.5 – 3.5 | ≥ 450 | Z450 / PosMAC 350 | 10.0 – 14.0 | Extra-wide bay logistics parks, aircraft hangars |
* All profiles can be custom engineered to proprietary web-to-flange ratios and pre-punched according to client Tekla / SDS2 structural shop models.
Israel presents a unique convergence of hyper-aggressive marine atmospheres, severe seismic fault dynamics along the Great Rift Valley, and extreme desert thermal excursions. Our OEM Z purlins are engineered with zone-specific material treatments to ensure total compliance with Israeli construction standards.
Environmental Category: ISO 9223 C4 to C5 Very High Atmospheric Corrosivity.
Projects constructed within 5km of the Mediterranean coast experience persistent airborne chlorides combined with elevated humidity. Standard Z180 or Z275 galvanizing can suffer rapid sacrificial zinc depletion.
Engineering Answer: We supply Z purlins cold-rolled from Zn-Al-Mg (PosMAC / Magnelis) or heavy batch HDG Z350/Z450 with pre-passivated coatings, preventing premature rust along bolt holes and lap joints across port logistics sheds.
Environmental Challenge: Active Seismic Fault Line & High Chemical Soil Salinity.
Under Israeli Standard SI 413 (Design Provisions for Earthquake Resistance of Structures), dynamic horizontal accelerations require minimal roof dead-weight to limit base shear and overturning moments.
Engineering Answer: High-strength S450GD cold-formed Z purlins reduce structural mass by up to 35% compared to hot-rolled channels, while providing the high ductility required to dissipate cyclic seismic forces without brittle fracture.
Environmental Challenge: Extreme Diurnal Temperature Swings (up to 28°C) & Dual Solar Loads.
Large agricultural packing plants and commercial rooftop solar arrays experience severe thermal expansion and contraction cycles that stress fastener connections.
Engineering Answer: We incorporate CNC-slotted expansion hole configurations and high torsional rigidity profiles that securely support dual dead loads (heavy industrial solar panels) and resist uplift wind vortexes common across open desert plateaus.
Market Demand: High-Bay Automated Warehouses (AS/RS) & Rapid Assembly.
With rapid growth in Israeli e-commerce and retail supply chains, distribution centers demand building clear heights exceeding 18 meters with 12m column grids.
Engineering Answer: Our deep-web Z250 and Z300 continuous lapped systems span long distances with minimal deflection, supporting integrated fire suppression piping, HVAC ductwork, and cable trays without the need for secondary sub-trusses.
The structural steel landscape in Israel is undergoing a rapid transition toward high-efficiency industrialization, accelerated by legislative mandates and strict sustainability goals.
Procuring structural steel components from overseas requires strict adherence to Israeli engineering codes to ensure smooth municipal approvals, engineer sign-offs, and SII verifications:
Structural Use of Steel: Design of Cold-Formed Thin-Walled Steel Members. Full compliance with effective width calculations and local buckling checks.
Seismic Code Compliance. Low dead weight, high-ductility materials designed to maintain structural integrity under localized tectonic forces.
Dual international certification allowing global EPC contractors and domestic engineers to seamlessly verify structural load calculations.
Joint Star Steel Structure brings over a decade of deep structural fabrication and cold-roll-forming experience to the Israeli commercial and industrial market. We eliminate trading markups, provide direct mill engineering accountability, and ensure flawless containerized delivery directly to the ports of Ashdod and Haifa.
We operate proprietary continuous cold-roll forming lines featuring up to 24 precision forming stations. This gradual roll progression minimizes residual stresses across web-flange radii, completely eliminating micro-fissures in high-strength S450GD steels.
We fabricate non-standard web depths (100mm to 350mm), variable flange dimensions, asymmetric lips, and custom web stiffeners to match client calculations precisely.
Every coil processed through our facilities undergoes rigorous mechanical and chemical verification. We execute inline yield strength testing, Elcometer zinc coating thickness measurements, and bend tests to verify coating adhesion.
Every order is delivered with EN 10204 Type 3.1 Mill Test Certificates, full heat number traceability, and dimensional QA inspection protocols that satisfy leading Israeli engineering consultancies.
Ocean transit to the Mediterranean requires specialized protective packaging to prevent moisture entrapment and white rust. Our purlins are nested tightly in rigid, steel-banded bundles separated by timber dunnage to facilitate smooth crane handling.
We utilize heavy VCI (Vapor Corrosion Inhibitor) waterproof wrapping and silica desiccant bags within 40ft High Cube containers or breakbulk holds, guaranteeing that your purlins arrive in pristine condition.
Direct answers to common technical, logistics, compliance, and commercial questions asked by Israeli structural engineers, general contractors, and procurement managers.
Our cold-formed structural sections are engineered in full alignment with the structural principles of SI 1225 Part 1 (Cold-Formed Thin-Walled Structural Members) and Eurocode 3 (EN 1993-1-3). The effective width calculations for slender elements under compression, local plate buckling, and distortional buckling resistance are fully verified through certified software (Tekla / CFS / cold-formed section solvers).
For seismic design under SI 413, our high-yield S350GD and S450GD steels provide the necessary material elongation (≥15%) to maintain ductility under cyclic earthquake excitation. The reduced self-weight of continuous thin-walled Z sections substantially lowers the total roof seismic mass, helping your structural engineer optimize foundation footings and moment frame sizes.
For installations situated within 0 to 5 km of the Mediterranean coastline (classified under ISO 9223 as C4/C5 marine atmospheric corrosion zones), we strongly advise specifying Zn-Al-Mg (Zinc-Aluminum-Magnesium alloy, e.g., PosMAC 310/350 or Magnelis) with an alloy mass of 250–310 g/m², or heavy hot-dip galvanizing with a minimum coating of Z350 to Z450 (up to 450 g/m²).
The addition of 3% magnesium in PosMAC creates a durable, self-healing simonkolleite barrier layer over cut edges and punched hole perimeters, offering more than triple the corrosion resistance of traditional galvanized coatings when exposed to humid, chloride-rich coastal air.
Yes. That is a hallmark of our custom OEM service. To achieve an efficient continuous lap purlin system, the overlapping section must nest snugly inside the adjacent section. We achieve this by forming asymmetric flanges (for example, a 68mm top flange and 62mm bottom flange on a 200mm web) combined with a slightly adjusted lip angle.
Our multi-station inline CNC punching system can produce standard round bolt holes (14mm, 18mm), slotted holes (14x22mm, 18x26mm) for thermal tolerance, and dedicated holes for sag rods and anti-sag struts directly from your Tekla drawing files without manual intervention.
Standard production lead times range from 15 to 25 days depending on total order tonnage. Ocean transit to both Haifa Port and Ashdod Port typically takes approximately 22 to 32 days depending on vessel scheduling and transshipment routing.
We pack purlins in nested bundles designed specifically for containerization. For 40ft High Cube containers, we optimize bundle lengths up to 11.85 meters, achieving weights of 25 to 27 metric tons per container to minimize freight cost per kilogram. For oversized spans (e.g., 12m to 15m), we arrange direct breakbulk break-bulk shipments with specialized under-deck stowage.
Every shipment is accompanied by a certified EN 10204 Type 3.1 Inspection Certificate that documents the exact chemical composition (C, Si, Mn, P, S), mechanical yield strength ($R_e$), tensile strength ($R_m$), elongation percentage ($A$), and zinc coating mass per square meter.
Our in-house detailing team works with Tekla Structures and Autodesk Revit. We provide Israeli engineering firms with digital components, connection details, and complete purlin schedule integration, ensuring zero discrepancy between your structural drawings and delivered site bundles.
We routinely conduct business under standard international trade terms including CIF Ashdod / CIF Haifa or FOB. Accepted payment mechanisms include confirmed, irrevocable Letters of Credit (L/C at sight) issued by major Israeli banks (e.g., Bank Hapoalim, Bank Leumi) or T/T wire terms tied to production and bill of lading milestones.
We provide full customs-clearance documentation packages including the Commercial Invoice, detailed Packing List with piece-markings, Bill of Lading, Certificate of Origin, and Mill Test Certificates to ensure rapid release through Israeli Customs Authorities.
Submit your project drawings, member schedule, or profile specifications. Our technical engineering desk will prepare a competitive CIF Ashdod/Haifa proposal, complete with continuous lap calculations, section properties, and production schedules within 24 hours.