I have 4 foot forks. I'm not sure what they are rated for. My loader is rated to lift 6,000 pounds, so weight isn't an issue. In my opinion, they are super handy when you really need them, but most of the time, I never use them. I don't see any reason for them to be longer then 4 feet.
When I first got them, I tried moving some pine trees to the burn pile with them, but it's almost impossible to get the balance just right. I have a grapple, and it's the ideal tool for moving trees, but since I had the forks already on, I tried using them. It was so frustrating that I will never do that again.
Currently I'm using my forks with my hay spear attached to the end of them for unrolling fence wire. Buying something designed to do this would be better, but also more expensive since I already own those things. It works great, so that's been the best reason for me to have forks.
Another handy use for the forks is picking up a stump that I can't get my grapple around. Some stumps are just too awkward to pick up. It's slow going, but very doable, so that was a nice surprise.
The wife wanted mulch, so I put the forks on to unload the trailer. I seem to use them about once a year for picking up pallets. This time it was mulch for my wife's gardens. I also buy pallets of concrete that I use the forks to place the pallet close to where I'm mixing it.
