Lattice Tower Members
CNC-punched angle members, galvanized and match-marked.
What it is
Angle-section tower members CNC-sheared, punched and notched to tower drawings, hot-dip galvanized and match-marked for site assembly.
Applications
Materials
Finishes
Dimensional & Section Details
Engineering drawings for sizing, cross-sections and installation reference. Click any drawing to enlarge.
Buying lattice tower members — answered
Practical answers for procurement, engineering and EPC teams — covering specification, standards, finish, lead time and export logistics.
Angle members (L-sections) are bolted lattice — easy to fabricate, transport in bundles, and assemble on remote sites. Tubular members (CHS) are welded or flanged sections — sleeker appearance, less wind drag, but heavier transport units. Transmission and telecom towers in India are mostly angle; some monopoles are tubular.
IS 802 (use of structural steel in overhead transmission line towers) and the supplementary IS 5613 are the Indian standards. International projects also cite ASCE 10 (US) and IEC 60826. Our fabrication is to IS 802 with galvanizing to ASTM A123 — accepted globally.
ASTM A123 minimum 86 µm zinc coating for members 6 mm and thicker; 75 µm for thinner members. Some utilities (PowerGrid, ADWEA) specify higher — 120 µm or class M for coastal corridors. We bath-test every batch with a magnetic thickness gauge and ship the test report.
Yes — every member is steel-stamped (or laser-engraved on visible faces) with the tower number, member ID and orientation. Match-marking matters because lattice towers have thousands of bolts and getting an angle reversed costs days of site standdown. Our marking system is BOQ-tagged.
Vajra runs CNC angle lines that shear, punch, notch and mark angle members in a single pass. Tolerances on hole positions are ±0.5 mm — required for fast bolted assembly. The CNC NC files come from the tower designer's STAAD or PLS-TOWER export, so there's no drafting drift.
Manufacturing & Surface Treatment
All products are manufactured at Vajra's Howrah facility under ISO 9001:2015 quality management. In-house roll-forming, welding, galvanizing and testing — without sub-contractor dependency — ensures consistent dimensional accuracy and surface quality across export orders.
Precision Roll-Forming
CNC roll-forming lines capable of ±0.1 mm dimensional tolerance on MS, GI, SS, and aluminium sections.
Hot-Dip Galvanizing
In-house HDG plant conforming to ASTM A123 / IS 2629. Average coating: 85–140 µm. Pre-treatment: alkaline degreasing → pickling → fluxing.
Welding & Fabrication
MIG, TIG, SAW welding. Coded welders under ASME IX / IS 2825 qualification. Weld inspection by UT / DPT available.
Surface Treatment
Hot-dip galvanizing · Pre-galvanized GI · Powder coating (Tribo gun, 60–80 µm DFT) · Mill finish · Chromate passivation.
Available Material Grades
Surface Treatment Options
Manufacturing Tolerances
| Length tolerance | ±3 mm on standard lengths |
| Width tolerance | ±1 mm |
| Thickness tolerance | ±0.15 mm (IS 1079) |
| Straightness | ≤ 1 mm per 1 m |
| Galvanizing coat | 85 µm min (ASTM A123) |
| Squareness | ≤ 1 mm per 100 mm |
Global Supply & Export Documentation
Lattice Tower Members is exported under a documented supply chain — from factory test certification through customs clearance to door delivery. All shipments are packed to sea-freight standards with full export documentation prepared in-house.
Incoterms Available
- FOB Kolkata
- CIF Port of Destination
- CFR
- EXW Howrah Works
- DDP (on request)
Export Documents
- Commercial Invoice & Packing List
- Bill of Lading / Airway Bill
- Certificate of Origin (CoO)
- Inspection Certificate
- Phytosanitary Certificate (where applicable)
- MSDS / Material Safety Data Sheet
- Test Reports & Mill Certificates
Packaging Standards
- Wooden crate — sea-freight grade
- ISPM-15 heat-treated pallets
- Steel-strapped bales for structural sections
- VCI poly wrapping for corrosion protection
- Moisture-absorbing desiccant sachets
Compliance & Standards
Manufactured and tested to:
ISO 9001:2015 quality management system. Third-party inspection available on request (SGS, Bureau Veritas, TÜV).
Lead time: Standard stock items ship within 7–10 working days after order confirmation. Custom fabricated quantities: 15–25 working days. Express production available — contact our export desk.
Countries importing Tower Fabrication from India
Tower Fabrication & Assemblies is in active demand across these markets. Click a country to see named importers, city-level volumes, and customs shipment intelligence.
GCC infrastructure, energy, and data-centre build-out with established Indian-origin supply lanes.
View marketASTM / NEMA-specified product for EPCs, OEMs, and industrial distributors.
Importers in Houston
View importersARAMCO, Vision 2030 mega-projects and GCC infrastructure drive enormous demand for structured cable management and earthing.
Importers in Riyadh
View importersStandards-compliant structural and electrical components for mining, oil & gas, and infrastructure projects.
View marketLNG infrastructure, post-World Cup development, and smart city projects driving cable management and steel demand.
View marketSectors That Specify This Product
This product line is specified by procurement and engineering teams across the following sectors. Each industry page lists the specific product requirements, typical standards, and export documentation relevant to that buyer profile.
Application engineering support: Our technical sales team provides product selection, load calculation references, and specification assistance for EPC, PMC, and procurement teams. Available for onsite consultation in major project cities.
Download Technical Documentation
Technical Datasheet
PDF · Engineering specifications · Export-ready
Complete engineering datasheet for Lattice Tower Members — dimensional data, material grades, tolerances, applicable standards, and export compliance information.
Free · No registration required · Tower Fabrication datasheet
Request a quote for lattice tower members.
Send drawings, a BOQ, or a simple description. You'll get a structured quotation covering specification, finish, lead time and Incoterms — from the manufacturer, not a middleman.
- MTC · COO · inspection reports
- ±0.01 mm precision · in-house QA
- FOB · CIF · CFR to all major ports