Fitness fanatics have less than a week to get their fix from the popular Jacob's Ladder in West Perth.

The well-worn outdoor staircase, which connects Cliff Street with Mounts Bay Road, will be closed indefinitely for a structural survey that may involve testing of its 242 concrete steps and metal infrastructure.

Exercisers will continue to have unrestricted access to Jacob's Ladder.

Scores of regulars pound the 43-metre staircase daily and is regarded as a great test of fitness.

Lord Mayor Lisa Scaffidi, said the City of Perth understood how important Jacob's Ladder was for recreational use, but it must be closed to allow the survey to take place.



​"In the interests of public safety it is imperative the structural survey is conducted," Ms Scaffidi said.



​"Unfortunately due to the nature of the testing required, there is no option but to close the area."



​The assessment will determine if any damage has occurred and consider what repairs are required.



​Jacob's Ladder could be closed for an extended period, pending results of the structural survey.



It will be officially closed from February 22.