A pre-engineered building is a steel structure whose members are designed and fabricated in a factory to a specific set of loads and dimensions, then bolted together on site. Sections are tapered to the forces at each point, which uses less steel than conventional hot-rolled construction and shortens the site programme.

Yes. Cutting, assembly, welding, surface preparation, painting and dispatch all happen at our own facility at a capacity of 1,250 MT per month, under our own ISO 9001:2015 quality system.

Yes, where the project scale justifies mobilising fabrication and erection to site. Our factory and the majority of our completed projects are in Tamil Nadu. The plant is within reach of Chennai, Tuticorin and Cochin ports, and we detail to BS 5950 and EN 1993 where an export project calls for it. For sites elsewhere, ask us early and we will be straight about transport and erection implications before you invest time in drawings.

It depends entirely on scope. A supply-and-erect rate covering frame, roofing and cladding is far below a turnkey rate that includes foundation, flooring and services. Clear span, eave height, crane loads, sheet specification, soil condition and site location all move the number. Send us the building and we will quote against a scoped bill of quantities, with the supply-and-erect and turnkey figures shown separately.

Usually not, unless the contract is explicitly turnkey. Because Infra Green also carries out civil works, we can quote the foundation and steel together under one scope — which is the most common reason clients ask us to take the whole building.

Fabrication runs in parallel with foundation work on site, which is where pre-engineered construction gains time over conventional building. The actual programme depends on built-up area, soil condition, statutory approvals and how quickly drawings are approved — we give a programme at concept stage, not after the order, and milestone dates go into the contract rather than staying a verbal estimate.

Yes. Bays can be added to the length without disturbing the existing structure, provided the original design anticipates it. Tell us at design stage if you expect to expand, and we will set bay spacing and gable detailing accordingly.

Yes. Our completed work includes a G+3 multi-storey steel structure of 30,000 sq ft for CTC International in Tiruppur.

Structural steel is sourced from BIS-licensed mills including TATA Steel, JSW Steel and SAIL, to IS 2062. Colour-coated PPGI and PPGL sheets are sourced to IS 14246 and IS 15961. Mill Test Certificates are verified against every incoming consignment, and heat numbers are traceable from raw plate through to the finished structural member.

No. Two Yaskawa robotic welding stations are deployed for suitable repetitive structural components, and an automated PTW and tack welding line produces built-up beams. Twelve MIG and ARC stations handle the balance of fabrication. The combination supports repeatable weld paths and consistent output — it does not mean every weld on a building is robotic.

Yes. In-house QC covers weld gauges, dye penetrant testing, coating thickness measurement, surface cleanliness comparison to SA 2½ and calibrated torque wrenches. For salt spray, tensile, coating adhesion and chemical composition testing we work with NABL-accredited laboratories and can supply batch-wise third-party reports for tender and export requirements.

Two things. First, the plant is automated rather than purely manual — Yaskawa robotic welding, CNC plasma cutting with Hypertherm technology, an automated PTW beam line, and our own purlin and colour-roof profile lines, so primary structure and roofing come from one production system. Second, we carry the civil scope as well as the steel, so the foundation and the frame sit under one contract instead of two.

Our 60,000 sq ft covered fabrication plant is at 228/2B-1, NN Pudhur, Pongalur, Tirupur District, Tamil Nadu, on a 35-acre site with yard, storage and expansion land. The corporate office is at JK Business Center, Sowripalayam Road, Coimbatore. Chennai, Tuticorin and Cochin ports serve export projects, and Coimbatore International Airport is about 40 km away.

Structures are designed and detailed to the code specified for the project: IS 800:2007, IS 875 Parts 1–5, IS 801 and IS 1893 for Indian projects, AISC 360 and MBMA where required, and BS 5950 or EN 1993 (Eurocode 3) for export work. Analysis and detailing use STAAD Pro, Tekla Structures and AutoCAD.