Using a similar technique as before, a staggered pattern is used on the edge. This allows the growing arch to be tied back the rest of the structure. Eventually, the arches have to spring on their own.
flying arms of the arch.
first arch complete! now the whole process is much easier because the walls are finally being supported.
building up second arch at the other end of the vault
with the second arch complete, now its on the the shorter, middle arch.
just have to fill in between the arches.
and there it is...the Mother's Day Saddle Vault.
already starting to think about the second layer.