Joined
·
2,743 Posts
PBS Nova show on 15th century Masonry/scaffolding @ 8:00PM Central time :nerd:
What fjn said.Just finished watching it,great program ! Thank you for the heads up about it !:thumbsup::thumbsup:
FYI, it's available to watch online.Since it was on PBS, you can probably find out when it will be run again. Luckily, we have several PBS channels and I hope to record it when I am prepared better.
I think it's as simple as it must cross the center point.
So, I got a question:
I "get" that a dome like the Pantheon in Rome would be a bugger to make go, but this one has very little arc - more like a spire.
What am I missing?
:huh:One important element is that the arch is not in plane with ground to sky but more in plane horizontal to the ground. This way its taking the inward load and redirecting the the main pilasters or ribs.
It's not so much the shape, but the height and span. It was constructed without support from underneath, i.e without collapsing during construction. That's the magic. Edit: and that the bricks were precisely oriented without a scaffold (arch form) to guide the laying of the brick. That's where the use of the "flower", center point and plumb lines all come into play.So, I got a question:
I "get" that a dome like the Pantheon in Rome would be a bugger to make go, but this one has very little arc - more like a spire.
What am I missing?