A hollow thin-walled pier made with polystyrene or using interior moulds.
Connected to the foundations through the use of metal foundation sheathing, or post-tensioned, at great heights.
The lintel is connected to the pier with projecting reinforcement and sheathing.
Shaft sections connected using the same system (heights > 30 m).
The aesthetic appeal of the flat roof can be accentuated by adding special border features.