Ask most people who builds mobile towers and they'll name an operator.
Fair guess. Wrong answer.
Telecom tower companies in India mostly own, lease and maintain sites. The steel gets cut somewhere else entirely - inside structural fabrication shops that never show up in a press release. Understanding that split explains a lot about why some towers age well and others don't.
Nobody starts with steel
The first thing produced is a load calculation.
Wind speed for the zone under IS 875 Part 3. Antenna projected area. Ice loading if the site sits up north. Then a tenancy assumption - how many operators the structure is expected to carry across its life.
That last number gets underestimated constantly. A 40-metre lattice designed around three tenants picks up a fourth two years later, nobody rechecks leg capacity, and the strengthening bill ends up higher than the original tower cost. Seen it happen more than once.
The shop floor
Angles, plates and tubular sections arrive first. Before a single cut, mill test certificates get matched against the heat numbers stamped on the steel - dull work, admittedly, but it's the only thing standing between a guess and verified yield strength on something meant to survive thirty monsoons.
CNC angle lines then handle cutting, punching and marking in one pass. Plates go for profile cutting. Monopole shells get rolled, seam welded, flanged at both ends.
Tubular welding is a different discipline from lattice. Harder. Fewer shops do it well.
Trial assembly
One complete tower gets bolted together before anything ships out.
Holes verified, members matched to drawing. It's slow, and it's the first step dropped whenever a delivery date starts slipping- which makes very little sense, because a bad hole found on the shop floor costs a couple of hours while that same hole found on a hilltop in Meghalaya costs two weeks and a return trip.
Galvanizing decides the lifespan
Telecom Tower Fabrication finishes at the zinc bath, and that's really where service life gets set.
Coating to IS 4759 lands around 86 microns on sections thicker than 6 mm. Coastal belts in Gujarat, Odisha and Tamil Nadu fall into C4–C5-M corrosivity, and paint out there starts lifting inside three or four years.
Bath length is the spec nobody quotes. Sections longer than the kettle get dipped twice, leaving an overlap band that tends to be the first place rust shows. Deeper kettles remove the problem outright - KP Green Engineering's Matar plant runs a 56 m³ kettle, the largest in Asia, so long monopole sections clear it in a single dip.
Then packing, which sounds boring
It isn't.
Watch an erection crew pick through unmarked steel in the rain and you'll never dismiss match-marking again. Tagged members, listed bundles, hardware packed separately with a spare allowance. Done properly, a crew stands up a 40-metre lattice in three or four days.
Done badly, day one goes entirely to sorting.
Worth asking
Kettle dimensions, not just monthly tonnage. Whether trial assembly is included or billed as an extra. What the design assumes about future tenants.
Cheapest quote seldom looks cheap by the second monsoon.
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