The firm won a contract from Sir Robert McAlpine to install 215 tonnes of steel on the new development, as well as provide strengthening and roof light projects.
The project is part of a £17m development at the Gateshead shopping centre to increase the variety of dining options available.
The new extension has added 11 new restaurants.
Managing director of SCH Site Services Gary Finley said: “The 215-tonne extension consisted of primary structural steelwork which had to be erected within a service yard surrounded by two-storey buildings on all four sides.
“The steel was delivered through a service tunnel on 45-foot trailers, and we had to work both days and nights to erect the steelwork to ensure we met a tight programme deadline.”
The project proved to be challenging for SCH, as staff had to work around a continuous stream of deliveries, necessary to ensure that the retail businesses were able to operate as usual.
“It was another complex job within a very testing environment but I’m delighted to say we completed the job within programme,” added Finley.
SCH is currently working on another project for intu at Eldon Square in Newcastle, which will see a £25m investment create 20 new restaurants in the Grey’s Quarter.