PROTECTIVE SHELTER

A protective shelter offering opposite outer supports (100) and a roof structure extending between the supports (100), wherein the roof structure comprises a plurality of tray members (50) arranged to receive earth, sand or aggregate material defining an inner skin to provide a first level of protection in the roof structure, and the tray members (50) are arranged to be supported by transverse beams (10), wherein the transverse beams (10) are arranged to be supported at their respective ends by the opposite outer supports (100) and wherein the transverse beams (10) form a transverse beam bridge across the shelter such that the height of the shelter centrally, and away from the opposite supports (100) is substantially the same as the height of said supports (100).