The origins of the ” six feet under” all started with the 1665 outbreak in England, as the disease swept the country. This made the major of London to quickly lay down the law about how to deal with the body to avoid further infections. The order was conceive and published by the lord Major and Alderman of the city of London those among his specifications, concerning the infection of the plague or avoiding infection from the plague, ” all the graves shall be at least six feet deep” pronounced as law.
The law eventually was accepted by the England and its colonies, apart from the modern American burial laws that vary from state to state, though many states or countries still require a minimum of 18 inches of soil on top of the casket or burial vault and Can also be in two feet of soil if the body is not enclosed by anything. A grave as shallow as four feet should be fine with an 18 inch dirt buffer and a height of average casket which appears to be approximately 30 inches.
Considering a typical modern burial it have to involves a body pumped full of chemical preservative both seal inside a sturdy metal casket, which could be made of metal, glass and so on, depending on the love ones capacity and strength, and itself seal inside a steel or cement burial vault.
Less of hospitable environment for microbes than the grave used to be. While an untypical or beautify burial, one is expected to have the body embalmed, where a vault is not use or the casket is wooden or forgotten entirely.
Well the untypical could look so local but still provide a measure of safety and comfort. If not properly protected and subjected to a few years of soil erosion, the bones of the disease could get spring out or surface and would in return scare people living around where it is lay while through soil erosion.
Therefore, every Graves are expected to be six feet for a comfort and to avoid being scared of the death, since we know that the grave is the permanent place of the body.