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India Electricals Syndicate
Institutional Reliability • Since 1972
GI & Structural Steel

HDG Steel Structure

IS:2629 certified hot-dip galvanized fabrications for corrosion-critical infrastructure.

MaterialIS:2062 Grade E250A / E300A / E350A
FinishHot-Dip Galvanized per IS:2629 / ASTM A123
Request Quote Datasheet

HDG Steel Structure — Overview

India Electricals Syndicate fabricates hot-dip galvanized steel structures at Howrah from IS:2062 certified steel, finished in a dedicated 12-metre galvanizing bath. Hot-dip galvanizing forms a metallurgically bonded zinc coating that protects steel from the inside of the section outward — the specified corrosion system for outdoor, coastal and process-plant structures where painted steel will not survive the design life.

Members are dipped to a minimum 85-micron zinc coating per IS:2629 and ASTM A123, with the long 12-metre bath allowing full-length structures to be galvanized in a single dip rather than progressively, eliminating overlap lines and weak joints. Fabrication, drilling and welding are completed and inspected before galvanizing so the coating is continuous over the finished assembly.

Each structure carries mill test certificates and galvanizing thickness records for tender and inspection. Send your fabrication drawings with a quote request and the Howrah works will return a fabricated-and-galvanized offer.

Technical Specifications

HDG Steel Structure

Specifications

Zinc Coating
85µ minimum (IS:2629)
Base Material
IS:2062 Grade E250A / E300A / E350A
Fabrication Tolerance
±1mm critical dimensions
Zinc Bath Temperature
445–455°C
Service Life (rural)
50+ years
Service Life (marine)
25+ years

Standards Compliance

  • IS:2629
  • ASTM A123
  • IS:2062
  • EN ISO 1461

Materials Available

  • IS:2062 Grade E250A / E300A / E350A
  • IS:808 Rolled Sections

Surface Finishes

  • Hot-Dip Galvanized per IS:2629 / ASTM A123

Applications

  • Power transmission towers
  • Substation structures
  • Telecom towers
  • Highway signage
  • Coastal infrastructure
  • Bridge drainage

Frequently Asked Questions

What zinc thickness is applied?+

Minimum 85 microns, metallurgically bonded, per IS:2629 and ASTM A123.

Why does the 12-metre bath matter?+

Full-length members are galvanized in a single dip, avoiding the overlap lines and weak points of progressive double-dipping.

Is the coating applied before or after fabrication?+

After — fabrication, drilling and welding are completed and inspected first so the zinc coating is continuous over the finished structure.

Where is it manufactured?+

At India Electricals Syndicate, Howrah, Kolkata — in continuous manufacture since 1972.

Testimonials

What specifiers say about IES gi structures

“IES has been our specified cable tray and earthing vendor across multiple thermal projects. Documentation, MTC, and dispatch discipline have been consistent over years of supply.”
[Procurement Lead Name]
Sr. Manager, Procurement
EPC contractor, thermal power project
“Hot-dip galvanizing micron consistency and IS 12352 conformance on every batch — that's what we rely on for corrosive coastal sites. Lead times from Howrah are predictable.”
[Project Engineer Name]
Project Engineer
Refinery project, eastern coast
“For solar mounting structures across our 50 MW deployment, IES held the galvanizing spec across 30,000+ pieces. Quality dispute count: zero. That tells the story.”
[Site Manager Name]
Site Manager
Solar IPP, western India

Names redacted pending NDA / consent. Real attribution available on request — speak with your IES sales contact.

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