Production, transport and assembly of steel structure for a biofuel boiler with floor plan dimensions of 40 × 42.5 m and a height of 41 m, plus the corresponding service steel structures and pipeline bridges. Part of the work supplied was also the manufacturing documentation for the secondary steel structures of railings, floor grates and floor plates. The "Carpe Futurum" project of the Swedish energy company Vattenfall AB is an important part of Vattenfall's goal to become CO2 neutral by 2030. The new boiler plant will provide heat and electricity for the entire region of Uppsala.