How to build a Cathedral, part 6

The wood structure is now complete. Some glass panels have arrived at the site, so soon there will be glass as well as wood.

The workers are spending a lot of time at the top of the building. They are working on the metal rails that run along the outside of the top of the cathedral. They clip themselves to a line which runs parallel to the plank, and walk fearlessly across.

Here we can see the wood laminate skin that covers the structural support for the organ pipes. The skin provides structural support, so this is a monocoque structure.