Ive been around knuckle boom cranes for well over 20 years and as such, have found one thing very odd about them… You never really know just how much you are lifting do you?  Out of all the training we do, I challenge each of the students to “guess” as closely as they can, just how much the product they lift all day, every day weighs.  And guess what…all of them get it wrong!  That was the most amazing thing and still is to this day. I happen to come along an item in the Alberta OH & S guidelines, Part 6, code section 68, (68.1) to be exact and I quote: “An employer must ensure that the operator of