Yes, I am back to mucking about with dwarven stuff again. These are my own concepts rather than being based upon any of the little info we have on EQN dwarves (it is also not informed by any EQ lore, as I am not an actual EQ player).
IOW, I am bored and I have finished Witcher 3 and Fallout 4, so I am killing some time in Landmark
This is the basic form of a hallway (subterranean). This would be used in areas that do not see a lot of traffic (residential, light industrial). Forms for larger and smaller halls would be similar, but on a reduced or enlarged scale–with more decoration at the larger end of the scale.
The triangular area at the top is a relieving space (transfers the load from the roof to the side walls). It is structural rather than functional in any game play sense (although it is large enough to move through).
Right now I am mulling over the details (pretty happy with the basic form) and the junction geometry.