Crane calculations

[ztec]

I have a cheapo crane I have been using for awile from harbor freight for my job of installing inground basketball hoops. With its setup from the factory it can lift 1000 lbs boomed all the way in than 700 lbs 8 inches out, 600 lbs at 14 inches out and 500 lbs at 20 inches out. I would like to gain about 10 inchs in overall height when the crane is at 60 degrees up which would involve making a new boom piece to replace the factory 2x2x.125 with a longer one that would end up being about 31 inches out. It would need to lift about 125 lbs max. Is the something that could be safely done. Keep in mind the boom tube is 30 inches long so when its on the 500lbs setting only 6 inches of it is inside the first piece since I dont need to lift 1k with it I could have the boom piece go inside the other piece the whole length of it. Any ideas would be great...if any specific measurements are needed just ask

[tapwelder]

I don't know how it mounts, however why wouldn't you modify the shaft/column below the jack to get the height. I think you could conserve more capacity. I would be easier to rebuild the entire column if needed.

[ztec]

I don't know how it mounts, however why wouldn't you modify the shaft/column below the jack to get the height. I think you could conserve more capacity. I would be easier to rebuild the entire column if needed.

thats an option as well but I already have some 2x2 square tube, to extend the colum I need to buy 2.5 inch sch 40 and theres no place local that sells it in sections less than 20 feet.

[bebo]

Try Yarde Metals www.yarde.com They have a "drop zone" on their website where you can get drops shipped UPS for a very reasonable cost. I often go this route when I don't require mill length material.

[Hammack_Welding]

if you aren't going to lift more than 125 max. I don't think that will cause a problem. ~Jackson