Question

How much force is there to lift an object?

Answer 1

By inspection the weight is centered at the center of gravity of the solid block, or in the middle of the span, 12.5 ft. So just divide the weight by 2 to get the reaction at both ends, or 12500kg. If the object were a different shape then the cg would be in a different location and a different analysis using reactions and moments would be required. But if you need to lift it at a certain rate other than very slowly then a different analysis would be also required using F=ma