Interarch: high flyer in pre-engineered steel construction

Details on how Interarch’s work at DIAL Terminal-3 stands apart from the rest of the PEB works in the industry
 Interarch is one of the leading pre-engineered solution providers that has the in-house capability and know-how to provide integrated conceptualising, design, manufacturing, supply and logistics, and on-site project management and execution capabilities over its entire pan India operations.
Interarch was chosen to come aboard under lead contractors Larsen & Tubro and GMR-DIAL, to execute the structural steel works for the domestic and international piers of the Delhi International Airport IGI – Terminal 3 project as well as the entire roofing system for the entire terminal building.
Through its course, Interarch would design, manufacture and construct over 7,500 tonnes of steel in under 8 months and would design, procure and lay over 1.2 million square metres of roofing material to cover one of the largest buildings in Asia.
Interarch’s ability to provide complete turnkey solutions in pre-engineered steel construction and in-house handling of the entire EPC function of this project led it to become a critical player responsible for the entire Terminal-3 project.
Located in a 50-km radius to the project, Interarch’s Greater Noida facility took on the challenge to produce some of the largest, most complex and utterly mindboggling pre-engineered structural steel systems for the Terminal-3 project.
Interarch’s project management and contracts division took over a 5-acre allotted yard space at the project site and built on location its offices, on-site handling, logistics and satellite manufacturing and finishing facility at the airport site itself.
To save time, Interarch manufactured all its sections in-house in Greater Noida and shipped them to site over night in lots. Close to over 300,000 parts and sections were shipped to site along with hardware for assembly during the course of the project and execution work.
Once the material reached the site, each part and piece of the giant airport terminal was carefully sorted and put in-line for final painting and fire-proof coating which was undertaken by specialised painting teams and Interarch sub-contractors at the its site establishment at DIAL T3. Once painting was completed, the parts were sorted with respect to part number and location as per grid and location tally spanning almost 3 km of building construction and were transported up to 2 km within the site, to the respective work fronts for assembly by simple bolt-on construction requiring no site welding and cutting and then lifted piece by piece to the top of the building to form the roof structure system. By having everything under its belt from design, manufacture, supply, logistics and project handling, Interarch took over the responsibilities of the structural steel work and roofing works from lead contractor L&T, and under its overall PMC controlled the entire execution and feed to the project site from its supply chain.The IGI-Terminal 3 building is the second largest integrated terminal building of its kind in Asia and its roof covers an area of more than 45 acres.
Once Interarch completed the structural steel design, in-house manufacturing and execution for the steel package of the project, it commenced operations on roofing.
Interarch operations were deployed after completion of its pre-engineered steel structural systems to roof the gigantic building in a world-class insulated seven-layer roofing system completed in aluminium.The entire roof system comprised of seven independent insulating layers, laid layer by layer, by hand, over a coverage area of over 45 acres. That led to almost 315 acres of roofing laid in less than 12 months. In engineered terms, almost 1.3 million square metres of roofing came together using some of the most tough to handle roofing material in the world.
Interarch designed and built for IGI T3, a roofing system to cater to a STC – 51 criteria for sound transmission, a never before achieved feat in any Indian airport as well as insulating properties of U<0.26 W/m2.
Each of the seven layers of the 1.2 million square metres of roofing was purchased by Interarch from the leading material vendors in the world and the aluminium skin was completely imported from Kalzip.
Authored by—
Gautam Suri,CTO & Founder Director, Interarch

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