What is the purpose of the dome-shaped part of an air seal burial vault?

The purpose of the dome-shaped part of an air seal burial vault is primarily to support the weight of the earth above. The design of the dome helps distribute the weight of the soil and any structures that may be placed over the vault, reducing the risk of collapse. The rounded shape is effective in bearing weight compared to flat surfaces, as it allows for an even distribution of pressure. This structural integrity is crucial for maintaining the vault's form and ensuring that it effectively protects the casket and remains inside from external elements and compressive forces.

While other functions such as aesthetics or inscription are relevant in certain contexts, they are secondary to the fundamental structural purpose of the dome. This practical aspect is essential in the construction and usefulness of burial vaults, ensuring resilience and longevity in a grave site.