How do you calculate the sizes of square section EN8 mild steel bar to be used to pick up a load, if I know the weight of the load and the length of the bar. I need to lift a 1 ton injection moulding tool with a bar of 400mm length. The bar is bolted to the top of the tool at both ends and an eye bolt is secured to the middle of the bar. Both eye bolt and fixing bolts are 16mm. I know I have to build in a safety factor of about 4 to 1 so I really need this bar to lift 4 ton.
Any thoughts would be appreciated. |