Groin Vaults l Prefabricated Groin Ceilings — Archways & Ceilings
how to make groin vault or cross barrel arch vault in sketchup - YouTube
Groined Vault With Zigzag Ridge-Joints, As A Double Barrel Vault, Cross Vault, At Right Angles Of Two Barrel Vaults, The Edge Between The Intersecting Vaults, Vintage Line Drawing Or Engraving Illustration. Royalty