[Scuba Steve]

That's a good question. To me it looks like they loaded all of it above the chimney. The city inspector said the weight was 3,700 lbs. Not sure of its distribution but from my ground level picture it does not seem very distributed. My guess is it was moved up there all at once by machine instead of multiple drops or carried by ladder as needed.

I haven't seen from above and roofers tarped it to prevent rain damage. They borrowed a cherry picker and kept looking around the chimney area, but at the time it was leaning over the edge of the roof and they were concerned about it falling onto the sidewalk. The chimney runs up through the second floor between two bedroom closets and continues straight on up maybe 4-6' from the roofline. No defects were ever noted with that either.