How is a rated capacity worked out for an attachment??
A… Check your trucks Rated capacity plate. Find a; The trucks lifting capacity (mast vertical) b; At what load centre. (load centre being the distance from fork face to c of g of load.) NOTE… RATED Capacity is overall rating ACTUAL capacity will be lower. (accounting for side-shift ect) An Example if not stated on De-rating plate to help…… Let us assume that your truck has an actual capacity of 2000kg at a load centre of 500mm and apply the law of leverage which states “Double the distance Half the weight” it follows that if we lift at a Load centre of 1000mm then we can only handle 1000kg.Or 2000mm would reduce us to 500kg.You can then work out what each 100mm costs us in lost capacity. In this case I can say my truck loses 200kg per 100mm. I am now in a position to work out what my capacity is for my fork extensions. We then simply need to reduce the figure by the weight of the extensions as well to have our new capacity figure.
