via megan: ...Seems to be an avenue closed, unless some one can climb up there with a tape...
Investigation: AO-2017-024 - Collision with terrain involving B200 King Air VH-ZCR at Essendon Airport, Victoria on 21 February 2017
The shipping container in one of the photos would be about 2435mm wide. The container is roughly aligned with the roofing ridges. Might give you a ball park figure to work with.