Distribution centres don’t come much larger than the colossal shed framed with Caunton Engineering’s structural steelwork for online retailer Amazon, at the Mountpark Bardon site near Coalville, Leicestershire. Known as unit one, and the first of three new centres to be built on the site, the structure measures 504m in length and has a width of 184m, offering just over one million square feet of floor space.
Main contractor Winvic started on this greenfield site, back in 2015. Working on a design and build contract, Caunton completed its erection programme, in the summer of 2016, in just nine weeks, despite some inclement weather during May and June. The structure is a large portal frame consisting of six spans. The two outer spans are 35m-wide, while the inner four spans measure 28.5m wide.
Perimeter columns are large 914 UB sections, set at 8.5m centres. Internally the columns are all bespoke columns fabricated from plate. Arranged in a hit-and-miss configuration throughout the structure, thereby creating more column-free space within the building, the columns measure 650mm deep × 400mm wide, with 25mm flanges.