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Author Topic: Log arch build for trailer  (Read 1360 times)

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Offline bertrn

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Log arch build for trailer
« on: December 15, 2018, 07:01:52 PM »
This is my first post and wanted to show others here my progress on building a log arch for my single axle trailer 6X10 with winch. I started by making the hinges from 2X3 angle iron 1/4" thickness. I milled some off of the 2" side and welded together forming a C channel that is 3"X3.250. I reinforced the wall of the hinge with a 1/2" block and drilled a 3/4" hole straight thru. Used a reamer that was available to finish the hole at .753 as my hinge pin is from a .747 piece of stainless steel. These hinges will be mounted to the trailer floor. The arch is being made from 2X3 1/4" thick tubing. 

 

 

 

 

 

     

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Re: Log arch build for trailer
« Reply #1 on: December 15, 2018, 07:22:37 PM »
A first post with pictures. Congratulations and Welcome to the Forestry Forum. 

Add your location to your profile so that we will know/remember. :)

(Just above the "CLICK HERE TO INSERT IMAGE IN POST" there is a box where you can click and rotate your picture +90 and it will be oriented correctly.)  ;)
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Offline bertrn

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Re: Log arch build for trailer
« Reply #2 on: December 15, 2018, 10:58:55 PM »
Thanks, I have a lot to learn from everyone here. One thing I would do different would be to NOT BUILD AN ARCH! I would use two vertical, one horizontal and brace it. The angles were just too much work. Here are all the pieces including the hinge pins ready to be welded. 

 

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Re: Log arch build for trailer
« Reply #3 on: December 16, 2018, 08:12:23 AM »
Hey, smiley_wavy you are my neighbor.  8)
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Offline charles mann

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Re: Log arch build for trailer
« Reply #4 on: December 16, 2018, 10:34:39 PM »
how much are looking at lifting?
 
i built an arch using 2 1/2" sq tubing, 1/4" wall and cut my angles at 22.5 to help spread the load out. i used some 3 1/2" round tubing, 1" wall and a wrist pin of 2 1/2". i first had a 12,000# winch, but fired it and put my 18,000# on and i think by changing from a 24v dc motor, to a 12v dc, i cut my power in half. going to contact warn monday to see what they say about it. but the heaviest iv load iv loaded to date was 2 sections of pecan weighing 12,300#, so ea were just a tad over 6,000# or 1 a bit liter than 6k and 1 well over 6k. the biggest mistake i made was, making it to tall. i think I'm a little over 12' long/tall, with a 4' over hang off the back of my trailer. the idea was to use that extra 4' to reach out further and choke short to be able to pull the logs onto dovetail. but over the past yr of working it, iv realized its to tall when in the near vertical position and pulling between 30 and 45 is stressing the arch. i can see a considerable bow in the legs, so plans are to take off 4' and re-contour the sq tubing for the hinge and weld it back up. i even used 1/2" thick, 6"x14" flat plate and welded 2 at ea 22.5 cut/weld to help reinforce the arch, which it did, but it transferred the stress directly down the legs, bowing them out. 
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Offline bertrn

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Re: Log arch build for trailer
« Reply #5 on: December 16, 2018, 11:50:33 PM »
This arch will be 6' tall and I intended to mount on the dovetail. Is that a wise decision based on your experience? I am reinforcing the joints with 1/4" plate 2-3/4" wide. I try to use as much scrap metal as possible as I am very frugal and this was the only flat bar I had in the scrap barrel. Thanks for sharing your design. 

Offline charles mann

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Re: Log arch build for trailer
« Reply #6 on: December 17, 2018, 01:23:40 AM »
This arch will be 6' tall and I intended to mount on the dovetail. Is that a wise decision based on your experience? I am reinforcing the joints with 1/4" plate 2-3/4" wide. I try to use as much scrap metal as possible as I am very frugal and this was the only flat bar I had in the scrap barrel. Thanks for sharing your design.
i i had thought about mounting on the dove as well, but decided that to achieve the ability to get a log further onto the trailer, moving it closer to the front was better. i think i am 4 stake pockets forward of where the dove and deck meet. when i chop off the legs, i will move the arch as far rearward as possible, to still give the ability to hang off the back of the dove. 
not sure where my thread is on my arch, but its somewhere on here, in a thread with a feller building his arch out of wood. 
as for wise, i don't know, since i have not tried it from there. i do have holes drill and tapped to accept the arch hinge blocks, which i think were nearly as big as the pocket itself. i had to add a washer (for use with a 1/2" grade 8 bolt, washer is 8 too) to take up the space between the pocket, hinger block and the trailer frame. 
Temple, Tx
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Offline charles mann

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Re: Log arch build for trailer
« Reply #7 on: December 17, 2018, 01:31:00 AM »
Log Loading Arch out of timbers. in Forestry and Logging

page 4 has a few pics of my arch. if you would like more, let me know. i fly back to tx the 21st and can get some more pics.
a pic of the arch pulling a crotchety top onto the dove is 1 of the 2 sections of pecan, that a combined wt. for the 2 was 12,300. the other pic with my wife standing by a log is the first large log i pulled, which stretched the weld on D ring
Temple, Tx
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Re: Log arch build for trailer
« Reply #8 on: December 17, 2018, 09:40:38 AM »
Wow, those were some impressive logs. I do not plan to lift anything of that size. I see your point about 12 feet being too tall also. Great info and thanks for sharing!

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Re: Log arch build for trailer
« Reply #9 on: January 03, 2019, 08:21:15 PM »
Just wondered how you are making out with this? I've been looking forward to some photos. Thinking of doing something like this for myself.
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Offline bertrn

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Re: Log arch build for trailer
« Reply #10 on: January 04, 2019, 03:40:33 PM »
I have not been able to work on it due to holidays but should anticipate next week finishing welding. I will post pics then. Thanks

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Re: Log arch build for trailer
« Reply #11 on: January 15, 2019, 08:45:39 PM »
The

Got a little welding accomplished this week. 

Offline bertrn

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Re: Log arch build for trailer
« Reply #12 on: January 16, 2019, 10:21:46 PM »
 < 


Offline bertrn

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Re: Log arch build for trailer
« Reply #13 on: February 11, 2019, 07:34:11 AM »
 

 

Offline Crusarius

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Re: Log arch build for trailer
« Reply #14 on: February 11, 2019, 08:11:09 AM »
oooh, shiny :) looks good so far. looking forward to seeing this in action been tempted to do it on my trailer.


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