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Thread: just have a question

  1. #1
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    just have a question

    i plan on building something similar to picture below was wonder what size square aluminum tube to use and wall thickness thank you Name:  pic02.jpg
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Size:  92.7 KB ps i am not a welder i am going to attempt this with a torch and rod method also ill be using more triangulation
    Last edited by chaplain robert; 04-27-2021 at 06:50 PM.

  2. #2
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    Re: just have a question

    How much weight does it need to hold?
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    Re: just have a question

    Quote Originally Posted by chaplain robert View Post
    i plan on building something similar to picture below was wonder what size square aluminum tube to use and wall thickness thank you

    ps i am not a welder i am going to attempt this with a torch and rod method also ill be using more triangulation
    You would be better off using steel and a mig welder.
    Weld like a "WELDOR", not a wel-"DERR"
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  4. #4
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    Re: just have a question

    What Shovelon said. X2

  5. #5
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    Re: just have a question

    Quote Originally Posted by G-ManBart View Post
    How much weight does it need to hold?
    there car ramps so alot

  6. #6
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    Re: just have a question

    yea but no welding machine and dont know how to use one

  7. #7
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    Re: just have a question

    Even if you're going to use a "torch and rod method," steel is still going to be easier than aluminum. (I wouldn't even consider soldering aluminum with those lame zinc "aluminum welding" rods for this project.)

    I'm with Shovelon and Bob -- steel is the way to go.

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  9. #8
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    Re: just have a question

    ok thx guys what size iron would 1 inch square tube work

  10. #9
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    Re: just have a question

    this is a better example of side profile
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    Last edited by chaplain robert; 04-27-2021 at 11:14 PM.

  11. #10
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    Re: just have a question

    Not a welder ? This sounds like a project you should avoid, unless you have substantial life insurance.

    IF you do decide to proceeded, I suggest locating manufactured ones and duplicate. All the engineering is done by professionals and you just copy.

    https://www.carlotstore.com/vehicle-...-cp-rpb36.html

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  13. #11
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    Re: just have a question

    I do NOT like the design. Too many stories about people dying crushed under a car. If these things were safe somebody would sell manufactured ones.
    I want to see the base wider than the tracks with "feet", and until they are securely under a car sitting squarely on them I want to see them connected securely to each other.
    Under NO circumstance should this be a project for a beginner welder. There is a lot to know about structure, engineering. Each weld MUST be sound or somebody is going to end up dead.

    My solution isn't absolutely safe either, but I love it. I have a grease pit. I'm not real tall. Mine is 5' deep. A hole in the floor39" wide, 12' long. When not in use I have four heavy framed with 1/4" aluminum diamond plate covers. These are strong enough to drive a truck on.

    Another option: Buy a very good air powered jack, and very good quality jack stands. From my childhood, I remember homemade jack stands made from old Ford truck differentials. These unbolted into a sort of funnel shaped structure probably 15" diameter. My father's friend used these before he bought a lift, and for long term projects he didn't want the lift tied up.

    If you do go forth, consider 3" 1/4" wall square tube bases under the Feet you show at least 20" wide. Each end of these gets a 5" square of 3/8" flat under. 2" T35 square 1/4" wall for verticals & gusset the corners so they don't fold as you drive on.
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  14. #12
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    Re: just have a question

    I agree completely! You should not be undertaking this project. Any other adice given to you will likely get buried along with you after completion.

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  16. #13
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    Re: just have a question

    thx for all the advice i think ill give up on project for now God bless all of you

  17. #14
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    Re: just have a question

    Quote Originally Posted by chaplain robert View Post
    thx for all the advice i think ill give up on project for now God bless all of you
    There are other options though, and very cheap too.

    I've seen several people stack layers of plywood up, each layer a little shorter in length.
    This makes a ramp that will not collapse.

    I've also seen it done with 2x lumber. Very easy to do and won't break.
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    My brother likes to use "wheel cribs"
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  19. #15
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    Re: just have a question

    ...probably cheaper than doing it with aluminum or steel, too ... even today, with lumber prices going through the roof.

    Simple, foolproof, what's not to like?

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    Re: just have a question

    Quote Originally Posted by Kelvin View Post
    ...probably cheaper than doing it with aluminum or steel, too ... even today, with lumber prices going through the roof.

    Simple, foolproof, what's not to like?
    I use wheel cribs just like those but built from 2x6 lumber to hold semi trucks up. Works great.

  22. #17
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    Re: just have a question

    Not a welder and that designs sucks! Please dont make this. But seriously, don't make this!
    It seemed like a good idea at the time!

  23. #18
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    Re: just have a question

    Quote Originally Posted by 12V71 View Post
    I use wheel cribs just like those but built from 2x6 lumber to hold semi trucks up. Works great.
    Please mention you jack it up first, place the cribs, let the jack down. Driving up those ramps, or crawling under is not for the faint of heart.

    We had a builder last week 40 miles away working on a stock car, used an air jack, didn't put in the safety pin. He's dead forever, he don't move,.......he don't do nothin'.

    That is a quote from my 4 year old nephew when my pet skunk was clubbed to death by a crazy neighbor.
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  25. #19
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    Re: just have a question

    Quote Originally Posted by Willie B View Post
    Please mention you jack it up first, place the cribs, let the jack down. Driving up those ramps, or crawling under is not for the faint of heart.

    We had a builder last week 40 miles away working on a stock car, used an air jack, didn't put in the safety pin. He's dead forever, he don't move,.......he don't do nothin'.

    That is a quote from my 4 year old nephew when my pet skunk was clubbed to death by a crazy neighbor.
    I have two 10 ton air operated floor jacks to lift the axles, my cribs are 10" max. One thing to remember when lifting trucks with air suspension is to dump the air from the bags, otherwise you will get 2-4" of travel on the front axle as the bags slowly deflate. That will roll them off blocks or worse... tip jack stands.

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  27. #20
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    Re: just have a question

    those ramps in the pic are just an accident in the waiting. i can see them collapse sideways with their narrow build and not connected together to prevent tip over!

    do not build them following this design.

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  29. #21
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    Re: just have a question

    Just buy a lift. The cheap Chinese ones are affordable. The better USA made ones aren't so bad either with monthly payments. Plus you can always sell it to an envious neighbor guy if you don't want it anymore. And the new ones double as parking lifts, so an extra bonus there.
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  31. #22
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    Re: just have a question

    I fabbed up some wooden ramps like the ones pictured to carry on my tow trucks, they were great for low vehicles to keep from destroying the air dams & front fascia or rear valance panels.I did mine in 3/4 plywood. I have an old end lift I bought in about 76 or 77, paid 50 bucks for it then & it was probably 30 or 40 years old then, still works great.
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  33. #23
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    Re: just have a question

    Wow, I guess it's nice to know Darwin is still alive and kicking. The way things have been going the last couple years I was starting to think that dude already gave up and checked out.


  34. #24
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    Re: just have a question

    Quote Originally Posted by chaplain robert View Post
    i plan on building something similar to picture below was wonder what size square aluminum tube to use and wall thickness thank you Name:  pic02.jpg
Views: 418
Size:  92.7 KB ps i am not a welder i am going to attempt this with a torch and rod method also ill be using more triangulation

    I read through this thread and on first glance I would concur with the masses that they don't appear very safe.

    However, I would be curious if the builder/owner of those ramps is able to offer some input on the design and stability. That doesn't look like cheap construction - the steel I see in the picture is plenty beefy to hold up a car. So it might actually be a more stable set up than what we perceive just by merely looking at a picture of someones' contraption.

    That said, without any triangle bracing in the legs it would appear the main concern with failure would be racking - front to back primarily, sideways secondarily. Either is not good. However, that gets back to how the ramps were actually constructed. On top of the legs where they join up with the ramps and decks - what are those joints? Are they butt welds? Gusseted butt welds? Or do the legs interlock with the ramp or deck framing? We can't tell any of that from the picture so I again stand by the comment it would be nice to get some input from the builder/owner on their construction and some words on their actual stability.

  35. #25
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    Re: just have a question

    The biggest variable not mentioned is the weight of the vehicle. Biggest problem I see with the pictured ramps is that the only thing tying the vertical supports together is the top. There isn't much to prevent the supports from buckling front or backwards. Some simple lightweight X bracing would work wonders.

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