Jet blast resistant vehicle arresting blocks, beds and methods

A vehicle arresting unit, comprising:

• a block of cellular concrete having top, bottom and side surfaces, a top to bottom thickness, and a dry density in a range from 12 to 22 pcf;
• a top sheet comprising a section of cement board with a thickness not exceeding five-eighths of an inch;
• an intermediate layer of foam material positioned between said top sheet and said top surface;
• and
• a wrapping at least partially enclosing said block, top sheet and intermediate layer.

A vehicle arresting unit, comprising:

• a block of cellular concrete having top, bottom and side surfaces and a top to bottom thickness;
• a top sheet of frangible material positioned above said top surface and nominally coextensive therewith;
• intermediate material positioned between said top sheet and said top surface, said intermediate material comprising a sheet of foam material;
• and
• a wrapping at least partially enclosing said block, top sheet and intermediate material.

A vehicle arresting unit, comprising:

• a block of cellular concrete having top, bottom and side surfaces and a tope to bottom thickness;
• a top sheet of frangible material positioned above said top surface and nominally coextensive therewith, said top sheet comprising a section of cement board with a thickness in a nominal range of one-quarter to five-sixteenths inch;
• intermediate material positioned between said top sheet and said top surface;
• and
• a wrapping at least partially enclosing said block, top sheet and intermediate material.