A mechanical workshop forms an important part of any industrial site of this size. Many of the production sites and machines are unique to each site, and several machines have been invented and built for specific sites.

The mechanical workshop at Kirkenes is an extended building made of concrete with an arched cavity roof and long lines of windows. Inside it is important to have a lot of room to manoeuvre the cranes that lift heavy equipment and this is why the cavity roof (which does not required pillar support) is a natural construction choice.