3Shell Designs 4 basic styles: 1) elliptic 2) octagon 3) round corner: “curved corner formed by the addition of a rounded corner piece that has been stamped or milled during the manufacturing process. The corner is welded in position.”4) Square/miter corner: “sides and ends are joined at a 90 degree angle”
5Cap Closure Gasket: Locking Mechanisms on Gasketed Caskets: 1) Sliding Lock Bar2) Lever Lock3) Threaded Fastener
6Closing Mechanisms on Non-gasketed Caskets 1) Latch Closure2) Threaded Fastener3) Chemical Compounds: butyl tape or epoxies4) Hermetically Sealed
7Casket Sizes Metal: 23/24 X 78 inches (6 ½ feet) Wood: 22 X 75 inches Interior height inchesWood: 22 X 75 inchesInterior height inchesOversize Caskets:“X” = +2 inches width and +3 inches in length“XX” = +4 inches width and +6 inches in lengthStandard burial vault = 30 X 86 inches
8Infant and Children’s Caskets Range = 12 inches to 5 feet 6 inchesIncrease in 6 inch increments.Widths are proportional to length.Vacuum-formed or injection-molded polymer plastics are common.Many are combination units.
9Outer Burial Container Vaults“an outer enclosure which offers protection from the earth load as well as possessing sealing qualities”Outer Burial Container“any container which is designed for placement in the grave around the casket, but not limited to containers, commonly known as burial vaults, grave boxes and grave liners”
10Purpose of Vault1) support the weight of the earth over the grave (earth load/static load)2) limit the intrusion of outside elementsdifferential load: short durationdynamic load: varies in intensityimpact load: sudden and powerful application of forceStandard dimension: 30 X 86 inches
11Concrete VaultsMay or may not be internally reinforced: smooth steel bar/rebarLining materials: polystyrene, ABS, stainless steel, copper, bronze, asphaltExterior treatments: decorative and/or protectiveGalvanized: “steel that has been coated with zinc for increased resistance to rust”
12Metal Vaults Most common: steel, stainless steel, and copper Common thickness: gaugeShallow base and a top/domeUses the “diving bell” principleDome: “the top of an air seal burial vault which entraps air as it is put in position; it also supports the weight of the earth above”
13Fiberglass and Polymer Vaults Often use air seal principle but some use the top seal principle.
14Methods of Vault Closure Top Seal: “utilizes an epoxy compound in conjunction with tongue-in-groove construction at the top edge and the lid of the vault”Air Seal: “utilizes the air pressure created by placing the dome of the vault onto the base of the vault”Double Seal: “a method of closure that utilizes the principle of the air seal in conjunction with an epoxy material at the junction of the dome and the base of the vault”
15Grave LinersPurpose: support the weight of the earth covering the graveMaterials used: concrete, wood, polymer and fiberglassTypes: grave box - “an outer enclosure consisting of a body and a one or two piece lid”sectional/concrete sectional – “a grave liner consisting of 6 or 8 slabs of unfinished concrete placed around the casket”