the turbine 30 via brackets 15 18 a beam 20 supporting the rail structure 1 is attached to a first bracket 18 via a pivotable joint two chains 16 span from a second bracket 15 attached to the wall of the turbine 30 above the first bracket 18 to the rail structure and hold the beam 20 in a defined angle relative to the turbine 30 the tilt angle of the beam 20 can be adjusted by adjusting the length of the chain 16 e g with the help of a chain block the angle of the beam 20 relative to a horizontal plane is typically equal to the direction of the main axis of the turbine component 7 respectively axis of the opening in the turbine 30 for receiving the turbine component 7 when aligned to the axis of the opening the turbine component 7 can easily be mounted or dismounted by the traveller 10 which can move along the rail structure 1 with the tilt angle of the beam 20 the traveller 10 can be moved along the rail structure 1 with the help of a jack screw system 21 fig4 shows an example with an overhead mounted rail structure 1 the rail structure is attached to an overhead wall of the turbine 30 via brackets 13 14 a beam 20 supporting the rail structure is attached to a first.