Roof top Pier Construction

I am currently constructing a second floor master bedroom suite with a uncovered porch. Great place for my LX200 10" pier mounted. I planned to use a 6" steel pier attaching it to the building corner of the walls below. it will be isolated from the porch floor. Any other ideas on controlling vibration to the pier? This location will be used for astrophotography.

Thanks for the help,
Tom