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3.13 Vault Roof Beams

The Cyclotron Vault roof consists of 132 30-m long concrete beams, each 1.6 m deep, arranged in three overlapping layers for radiation protection.

The roof beams are 30" wide and 64" high. The length of the bottom layer is 93'6", the middle layer 95'6" and the top layer 97'6".

The average roof beam contains 96 tons of concrete (~48cu.yds.) and 4 tons of re-bar, for a total weight of ~100 tons.