Hi all

I have ordered a big .. really big shed made from metal - it weighs in at 334kg (52.8stone) - Now I have heard that there is a calculation for working out the cement I need for a base, any builders out there that might know?? also - I'm not 100% sure of the cement/ballast mix... 3 to 1 ??? I would like to put the base down myself, given the cost of the shed I don't want to spend any more money of i have to!

Thanks for any advice in advance