Elsewhere on the forum I posted a couple of pics of rural grain stores aka feed mills. They often have a ’hut’ on the ridge line of the main building, I doubt if it serves the same purpose as a lucum, what is the purpose and what are they called?
I think they contain the mechanism for lifing the grain to the next floor(s) to enable the grain to be dropped into the head of the chutes for bagging into sacks. As to what the 'hut' is called I don't know at this stage.
Looking at this one in Kupferzell (Baden-Württemburg) has the 'hut' and is part of the Hohenloher Freilandmuseum Wakershofen group of historic buildings.
I think Dave is right. The hut houses the elevator that feeds grain to the highest point within the storage building. From here, gravity feeds it to various storage silos. Many mills have similar elevators to utilize gravity to feed flour from grinder to grinder.
The US book, Down to the Feed Mill, labels the ‘shed’ as a head house presumably as it houses the headgear for moving sacks of grain between levels……seems logical.
No doubt, the English term will be completely different.
Interesting Hornby are producing HO buildings. Obviously based on the one at Kupferzell (as seen today with the enclosed waiting shelter) which will go nicely with Kupferzell station building from Busch.
And a 1895 photo I found of Kupferzell before the goods shed was enlarged and with the open waiting shelter.