[PSUBS-MAILIST] concrete

[Sean T. Stevenson]

Hank,

There are countless varieties of concrete, all with different mechanical
properties, so it is difficult to make an effective comparison, but just
for fun, I ran your scenario (6' OD, 4in thick shell) with average
material properties for ordinary concrete, and it turns out it's good to
over 1000 fsw!  See below.

Sean



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