Custom gin pole trailer

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I’m designing and building a gin pole setup for my 24’ lowboy. I’m building this to pick up some w8x24 beams I’m using to build my shop. I’m going to have a 16’ eve height so the peak of the gable will be 21’.. anyway I thought I would share my build.

Here’s the plans laid out on grid paper. Excuse the chicken scratch.Sent from my iPhone using Tapatalk
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I still need to add a safety chain to keep the poles off my truck in case of a failure. I also have to add some cable so my 12000 lb winch on the front of the trailer will have a straight line pull. This was just tested pulling the poles up and picking up my little ranger 8. The poles are 3” sch80 pipe 30’ long.Sent from my iPhone using Tapatalk
Reply:That's going to be fun to maneuver around the beams to either left or right and hold in place while being fastened or welded in place. Or are you going to fasten/weld them as a truss and then set them in place on the walls?🤪
Reply:I wouldn’t trust them stake pockets yo hold they aren’t welded that great!
Reply:Any comment would be speculation but there is no reason it wouldnt work especially if it was set and only to make the pic.  There might be a real reason for this, its something I would have done back when,,, today would likely have it all ready and hire rental crane or zoom boom vs the effort to rig this if I didnt already have a crane truck.www.urkafarms.com
Reply:Would block under trailer rear if the pick was heavy or needed to boom down but doesnt appear to have winch for that.www.urkafarms.com
Reply:When moving it around with a beam hanging keep the beam low and and the center of it attached to the trailer so it can't swing if the trailer hits uneven ground. I think just the weight of the poles could make it tippy if the trailer tilts too far.Ol' Stonebreaker  "Experience is the name everyone gives to their mistakes"Hobart G-213 portableMiller 175 migMiller thunderbolt ac/dc stick Victor O/A setupMakita chop saw
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Originally Posted by _Weldman_

That's going to be fun to maneuver around the beams to either left or right and hold in place while being fastened or welded in place. Or are you going to fasten/weld them as a truss and then set them in place on the walls?
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Originally Posted by Leogl

I wouldn’t trust them stake pockets yo hold they aren’t welded that great!
Reply:just a quick question.......otherwise, I know nothing about these things.Are the eyes that secure the bottom of the poles just bolted to the fenders, or is there something underneath the fender supporting them?
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Originally Posted by farmersammm

just a quick question.......otherwise, I know nothing about these things.Are the eyes that secure the bottom of the poles just bolted to the fenders, or is there something underneath the fender supporting them?
Reply:your going to have some tongue lift with lifting that far back behind the axles be careful the hitch/ tongue doesn't fail most of them are not designed for high loads in that direction. I had a pump pulling unit on a gooseneck trailer for a few jobs and it would start lifting the pickup tires if i pulled too hard. and I was only about 6' of standoffLast edited by idacal; 9 Hours Ago at 05:59 PM.Do not argue with an idiot. He will drag you down to his level and beat you with experience.
Reply:Yes, might need to block it, test load it all at ground level, 1200 is relatively light  but this is fairly tall.   Like u said, and above test rig it and get all centered well etc is a big factor. I would have couple 6x6 each side in the rear, block it b4 its loaded and the weight from the pick will crunch it right tight and make it solid just like outrigger.  The experience from the first will help, second will be easy.   I might even test it out in the open, rig one up and see how it all feels.Last edited by Sberry; 9 Hours Ago at 06:27 PM.www.urkafarms.com
Reply:The poles are 3” sch80 pipe 30’ long.
Reply:I was wondering at what point is would Buckley and how much movement it would take,, ha. Higher it got and sorted the load line would be more acute so to speak?www.urkafarms.com
Reply:.......Here, hold my beer.  Watch this!!!!!
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Originally Posted by Ingenuity

3" Schedule 80 (X-strong) pipe for 30' length under compression has a slenderness ratio of 316 (30'*12"/1.14"). Typically a slenderness ratio of over 200 is considered slender, and prone to secondary effects related to column buckling.For a 3" Sch 80 pipe at max of 19' length (where slenderness is = 200) the allowable capacity is approx. 10,000 lb.Although your applied load is only a fraction of this, you need to be conscious of the slenderness when lifting loads, especially if they become dynamic!
Reply:The axial capacity of a 30' long 3" Sch 80 is about 4,000 lb - reduces substantially due to the inverse square of the length. Elastic buckling as a failure mode happens quickly. Add in some bending moment into the section and it goes 'south' real quick. In the lateral direction you could triangulate/lace/brace between the poles and gain significant axial capacity, BUT you will still have a weak-axis about the longitudinal direction.LINCOLNSquare Wave TIG 200Power MIG 210 MPRanger 330 MPXMILLERThunderbolt AC/DCHYPERTHERMPowermax 190CPowermax 45XPHOUGANHMD 130HMD 505FEIN/SLUGGER 14" COLD METAL CHOP SAW 9" COLD METAL HAND-HELD SAW
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Originally Posted by Ingenuity

The axial capacity of a 30' long 3" Sch 80 is about 4,000 lb - reduces substantially due to the inverse square of the length. Elastic buckling as a failure mode happens quickly. Add in some bending moment into the section and it goes 'south' real quick. In the lateral direction you could triangulate/lace/brace between the poles and gain significant axial capacity, BUT you will still have a weak-axis about the longitudinal direction.
Reply:Looks great Remember the only disadvantage you have inside to outside. I would be very careful around power lines  if hit do not get truck till you free power linesDave

Originally Posted by shallowwatersoul

I’m designing and building a gin pole setup for my 24’ lowboy. I’m building this to pick up some w8x24 beams I’m using to build my shop. I’m going to have a 16’ eve height so the peak of the gable will be 21’.. anyway I thought I would share my build.

Here’s the plans laid out on grid paper. Excuse the chicken scratch.Sent from my iPhone using Tapatalk