I have a large machine that must be installed on concrete foundation. It can have no more than 20 micron deflection. Are there different types of concrete? The specs i have from the manufacturer recommend Foundation block reinforced concrete C30/37. this is 1500 mm deep foundation that is 7730 mm long and 6000 mm wide. i have a 34,000 pound granite plate on the concrete and 30,000 pound part resting on it. The gantry machine surrounds the part and plate and weighs less than 30,000 per side Any tips of links that will assist are much appreciated.