Square
shafts

Manhole

Upper shaft lock composed of a frame and a cover.

Cover plate

Building component for horizontal covering of the shaft, over which the levelling ring of a manhole is located.

Shaft ring

Vertical structural component with uniform profile except for joint location. It can be fitted with a joint enabling conduit connection.

Shaft bottom

Vertical component with bottom, with or without offset, and with appropriate joints for watertight pipe connections.

Square sewer shafts WN 1500

ZDC – square cover plate, SKC – square ring, BZC – square foundation piece, PS –steel clamp step with PE coating, V15-V60 – drain diameter