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Old April 23rd, 2012, 08:28 AM   #21
SweetLeah
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Originally Posted by Coyote Red View Post
I can look through my notes from last term and see if I can find the section where we covered bending moments in a wooden structure.

Could you please look up the same information regarding a lego structure?


Thanks.

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Old April 23rd, 2012, 08:40 AM   #22
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Check out this thread for ideas. http://67-72chevytrucks.com/vboard/s...d.php?t=346948
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Old April 23rd, 2012, 09:04 AM   #23
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Originally Posted by SweetLeah View Post
Could you please look up the same information regarding a lego structure?


Thanks.

Raining on my parade I see. This is the second time I have found a use for that class outside of school. As for your question I will ask my friend who is in a class where the informal name is Lego Lab.
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Old April 23rd, 2012, 09:27 AM   #24
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Overthinking it.
If you have a newer swing set they work like a dream. It is all redneck but I have pulled cabs, beds, and engines using a swing set with less then a 10' span. I actually did have a A structure like your talking about making back in HS. I made it out of 6" pipe and had the center section removable so it was easier to store.
Still a swing set made out of 6x6 beams(preferred) will do the same thing as far as lifting stuff and is something your kids (or drunk buddies) can play on.

Not a bad idea to have someone around to keep the cab from swinging or such more then anything.

As far as lifting it off using wood. Use 4x4's and tie them into some wood placed into the stake pockets. 4 buddies and some beer the bed will come off without a issue. The cab your better off using the seat brackets and you will need to remove the engine or bed first in order to do it that way. I would not trust a cherry picker to lift a truck cab off though unless I had someone holding it from swinging like a mo fo.
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Old April 23rd, 2012, 09:56 AM   #25
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I would not trust a cherry picker to lift a truck cab off though unless I had someone holding it from swinging like a mo fo.
No problems, though the cab was mostly stripped - it stlll weighed plenty

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Old April 23rd, 2012, 10:11 AM   #26
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I also did my toyota extended cab with just a cherry picker. a wooden cradle under the rockers, and a few balance weights inside, and it worked fine. But a gantry would be more stable, and easy to make.

People are overthinking it a little. The weight isn't much different than lifting a bit block.
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Old April 25th, 2012, 08:08 PM   #27
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well it's getting built this weekend so pictures will be posted. i have a few other uses for this crane so it will suit more then one purpose. i'm going to mount it on heavy duty casters to aid in moving it around, and i was planning on using large carriage bolts to bolt the top beam to the uprights i can take it apart as well.
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Old April 28th, 2012, 09:19 PM   #28
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well heres the end result of my gantry crane project. got the body off no problem. i have discovered only 1 problem and that is my legs are slightly crooked and it wants to lean one way or another when loaded. i'm going to brace the top with some angled 2x4's and i think that will take care of the lean. once i put the casters on it and paint it it's complete.
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Old April 28th, 2012, 10:08 PM   #29
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nice work man
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Old April 28th, 2012, 10:35 PM   #30
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Originally Posted by Kodiak450r View Post


well heres the end result of my gantry crane project. got the body off no problem. i have discovered only 1 problem and that is my legs are slightly crooked and it wants to lean one way or another when loaded. i'm going to brace the top with some angled 2x4's and i think that will take care of the lean. once i put the casters on it and paint it it's complete.
Actually looks pretty good. I would also suggest something (with the angled 2x4's) to keep the lower part of the legs from spreading once you get the castors on.
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Old April 29th, 2012, 09:00 AM   #31
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Actually looks pretty good. I would also suggest something (with the angled 2x4's) to keep the lower part of the legs from spreading once you get the castors on.
Yep, brace the uprights from doing the splits /--\, in the future, if you have to move it..

A couple things you can do:

run smaller braces from the uprights at an angle to the top beam, like 2ft long each.
_______
|/......\|
|........|

Also, you can make a temporary brace or so. Have a piece that will go from one foot all the way to the other foot (or even two), if you have to wheel the whole thing around. Screw them on quickly once you have the body or engine/whatever in the air, wheel it where it needs to go, remove them to to final position over a vehicle.

looks good
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Old April 29th, 2012, 09:09 AM   #32
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What about calling a local tow company with an extended boom? A few straps up it comes safe and secured.
This guy has no hill billy in him.

Try to imagine doing it with limited means, like you are on the A-Team,

Adapt and Overcome,

Nigger rigging is the true sign of genius.
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Old April 29th, 2012, 11:49 AM   #33
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This guy has no hill billy in him.

Try to imagine doing it with limited means, like you are on the A-Team,

Adapt and Overcome,

Nigger rigging is the true sign of genius.
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Old April 29th, 2012, 04:11 PM   #34
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Quote:
Originally Posted by Haggar View Post
Yep, brace the uprights from doing the splits /--\, in the future, if you have to move it..

A couple things you can do:

run smaller braces from the uprights at an angle to the top beam, like 2ft long each.
_______
|/......\|
|........|

Also, you can make a temporary brace or so. Have a piece that will go from one foot all the way to the other foot (or even two), if you have to wheel the whole thing around. Screw them on quickly once you have the body or engine/whatever in the air, wheel it where it needs to go, remove them to to final position over a vehicle.

looks good
yea i plan on doing angle braces at the top now i know i have room for them.
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Old April 30th, 2012, 04:22 PM   #35
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You put any load on that thing with casters on it, we'll be reading about you in darwin awards. Currently, you're relying on friction between the ground and your side supports to keep them from doing the splits. I don't think any bracing you can attach to the wood can withstand the rotational moment a load will impart at the top corners.

Think of it this way:

Stand with your legs shoulder-width apart while wearing workboots on concrete: Have someone start loading your arms down with 40# bags of salt. Your arms will be the weak link well before your legs.

Next - try the same thing again, but this time, be standing on ice. You'll be fighting with your own body weight just to stay upright. You might get one 40# bag before your legs shoot out to the sides: Best case scenario is that you might get two bags - but you have to fight with everything you've got to keep your legs planted. Any outside force is going to upset that balance and down you go.

Just sayin'.

Put wheels on that contraption, and you will most likely get squashed.
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Old April 30th, 2012, 04:32 PM   #36
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no casters! bad idea! it aint made for thet kinda side load from movement.

i saw pictures of a truck camper a guy put casters on the lift legs to push it into his garage.
it was totaled!

Last edited by joe_jeep; April 30th, 2012 at 04:35 PM.
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Old April 30th, 2012, 09:08 PM   #37
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Quote:
Originally Posted by ScOoTeR View Post
You put any load on that thing with casters on it, we'll be reading about you in darwin awards. Currently, you're relying on friction between the ground and your side supports to keep them from doing the splits. I don't think any bracing you can attach to the wood can withstand the rotational moment a load will impart at the top corners.

Think of it this way:

Stand with your legs shoulder-width apart while wearing workboots on concrete: Have someone start loading your arms down with 40# bags of salt. Your arms will be the weak link well before your legs.

Next - try the same thing again, but this time, be standing on ice. You'll be fighting with your own body weight just to stay upright. You might get one 40# bag before your legs shoot out to the sides: Best case scenario is that you might get two bags - but you have to fight with everything you've got to keep your legs planted. Any outside force is going to upset that balance and down you go.

Just sayin'.

Put wheels on that contraption, and you will most likely get squashed.
yea i decided i'm not going to put wheels on it. actually i'm going to tear it apart and build a new one at a later date. 10 foot really isn't tall enough anyways. needs to be at least 12 foot as my chain fall was maxed out and i barely got the body high enough.
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Old April 30th, 2012, 09:16 PM   #38
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No problems, though the cab was mostly stripped - it stlll weighed plenty

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Old April 30th, 2012, 09:30 PM   #39
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Is that body made from aluminum foil and bubblegum? Looks like a patchwork quilt.

I like it.
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Old April 30th, 2012, 09:39 PM   #40
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Is that body made from aluminum foil and bubblegum? Looks like a patchwork quilt.

I like it.
Yes, it is a jeep.
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