Try to find the spot where the photographer was standing.
They would never have envisioned a #bridgeclimb as they clambered around up there in space with no OHS to worry about...
Must be soon after 2/12/1930, the date on this one (see fewer hanging girders) - https://www.flickr.com/photos/state-records-nsw/7653426404/
The six-masted sailing ship in the distance (see note) is the 'Helen B, Sterling'. See the bridge being built in this reverse view -
Sad history of the Sterling ships - nicolecama.com.au/project/the-sterlings/