Engineers will be completing the main installation work overnight.
From 18:30 on Saturday 15 June until 10:00 on Sunday 16 June, five lanes of Great Western Road will be closed to traffic to accommodate the three cranes needed to lift in the steelwork safely.
A diversionary route will be in place for traffic travelling towards Glasgow while the work takes place and there will be one lane available for traffic travelling west.
There will be no change for station users who should still follow the footpath diversions during the road closure. Pedestrian access on the southbound footpath will remain open.
The lift towers will stand 12 metres tall, with steel walkways connecting the upper towers to the existing station platforms.
This will make it easier to use the station for those with mobility difficulties, and people travelling with bicycles, pushchairs or heavy luggage.