Technische Ressourcen

Comprehensive Auslegungsnorms, installation guides, and technical documentation for transmission tower engineering.

IEC 60826 CertifiedEN 50341 CompliantASTM A780 Qualified

Praxisreferenzen für Auslegungsnormen, Verzinkung, Verpackung, Prüfung und RFQ-Vorbereitung.

Technische Ressourcen für Freileitungsmasten

Praxisreferenzen für Auslegungsnormen, Verzinkung, Verpackung, Prüfung und RFQ-Vorbereitung.

Engineering-Prüfung und Dokumentenkontrolle
Materialrückverfolgung und Prüfprotokolle
Exportverpackung, Etiketten und Verladefotos

Auslegungsnorms & Structural Load Criteria

Unsere Freileitungsmasten erfüllen strengste internationale Auslegungs- und Lastnormen.

IEC

IEC 60826 - Structural Loading

Transmission tower design loads are determined per IEC 60826, covering wind loads up to 60 m/s (3-second gust), ice loads, broken-wire conditions, and seismic acceleration. Alle Lastkombinationen werden mit Finite-Elemente-Modellen und zuverlässigkeitsbasierten Lastfaktoren analysiert. Foundation reactions, deflection limits at service load (< H/200), and fatigue verification for cyclic wind are computed for each tower class.

EN 50341 - European Standard Compliance

For EU and export projects, towers are designed to EN 50341-1 (general) and applicable National Normative Aspects. The standard covers steel grade selection (S235JR - S420ML for angle profiles), bolt class (8.8/10.9 galvanized), and weld category assessment. Tolerances per EN 1090-2 execution class EXC2 - EXC3. All designs include third-party independent structural verification.

Installation & Field Maintenance Guides

Field-proven procedures for erection, hot-dip galvanizing repair, and long-term maintenance of transmission towers.

A780

ASTM A780 - HDG Field Repair

Feuerverzinkt coating damaged during handling or erection is repaired per ASTM A780 using zinc-rich paint (minimum 94% zinc dust by weight) applied in 100-micron minimum dry film thickness per coat, two coats minimum. For larger areas exceeding 30 mm diameter, thermal spray (zinc metallizing) per AWS C2.23 is specified. All repair areas are inspected with a magnetic thickness gauge per ASTM E376.

Torque

Bolt Torque & Anti-Loosening Checklist

All structural bolts are tightened to the specified torque per ASTM A325/A490: 1/2″ bolts = 75 ft-lb, 5/8″ = 150 ft-lb, 3/4″ = 265 ft-lb - 10%. Turn-of-nut method is used for slip-critical connections. Anti-loosening devices (double nuts, lock washers, or prevailing-torque lock nuts per IFI 100/107) are mandatory on vibration-prone members. Torque is verified with a calibrated wrench at 10% sampling rate.

Frequently Asked Questions

What Auslegungsnorms do your transmission towers comply with?

Our towers are designed to IEC 60826, EN 50341, and applicable national standards including ASTM, GB, and ANSI/TIA. We also offer custom designs per client-specific loading criteria.

What steel grades do you use for tower manufacturing?

We primarily use Q235B, Q355B, Q420B, and Q460C grades per GB/T 1591, and S235JR - S420ML per EN 10025. Higher-strength steels are available for ultra-heavy loading conditions.

What is the standard delivery time for 500 towers?

Lead time depends on tower complexity and quantity. A typical order of 500 medium-voltage towers is manufactured within 60–90 days from engineering approval.

What is the warranty period?

We provide a standard 24-month warranty from the date of shipment covering material defects and workmanship. Extended warranties are available upon request.

Do you provide installation supervision?

Yes, we offer on-site technical supervision for tower erection worldwide. Our engineers are experienced in foundation alignment, bolt torque verification, and HDG repair per ASTM A780.

How do you ensure quality control during production?

Our QC process covers raw material chemical analysis and mechanical testing per batch, dimensional inspection of punched/drilled holes, 100% visual weld inspection, ultrasonic testing (UT) for full-penetration welds, and final assembly fit-check on a sample basis.

Submit a Technical Inquiry

Have a technical question about Auslegungsnorms, installation procedures, or material specifications? Our engineering team will respond within 24 hours.

Need Engineering Support for Your Project?

Our engineers can review your project specifications and provide technical recommendations within 24 hours.

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