Re: Fw: [PSUBS-MAILIST] Re: Blowing ballast (was: question about general design?)

["David Shultz" <david_r_shultz@hotmail.com>]

Hey Guys,

I work at a limestone fabricator plant. Indiana Limestone has a weight of 
145 pounds per cubic foot. This is comparable to other limestones in the US; 
Alabama Limestone, Texas Limestone, Kansas Limestone, Mankato in Minnesota, 
etc. This might be the close to concrete depends on how it is poured 
(internal air pockets).

Later
David Shultz


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