Shaft made of segments with internal diameter 4.64 m
It is a shaft made of 6 rings, each with a height of 1.5 metre. There are 3 segments, each 120º, forming an arch. Every other segment ring is installed 60º rotated to the segment underneath.
Structural height is 10.5 m, wall thickness (enlargeable) is 20 cm.
Hoop reinforcement is φ 8/150, circumferential reinforcement is φ 8/300. In the vertical edge there is a 80 mm-wide and 35 mm deep (measured on surface) groove made, which is filled in with “Mapefil” non-shrink grout to glue elements as well as make joints impermeable to water.