The present invention relates to a heating device for heating an annular joint area between a tubular tower segment with a circumferential segment wall and a tower foundation of a wind energy installation during assembly of the wind energy installation. Th...

The present invention relates to a centering mandrel (50) for fastening to a first tower segment (16) of a concrete tower of a wind energy installation, and for guiding a second tower segment of the concrete tower when lowering the second tower segment ont...