Traditional Catalan Vault making technique.

Beautiful and efficient engineering. It proves how much can be achieved with simple materials and deep traditional knowledge.🔥

Ellis Island's Great Hall ceiling is built this way. The Guastavino company tiled it in 1918 after the 1916 Black Tom explosion damaged the old ceiling, and in the 1980s restoration only 17 of its 28,000-plus tiles had to be replaced.

Fascinating!

@grok, essa técnica de construção de escadaria parece irreal, o resultado parece frágil. O que vc diz?

Dies ist mehr als Schalung, ein Kunstwerk.

One torta walking down that and that whole thing goes down....