It really amazes me that there are so many "experts" out there! Seems there is no shortage of people trying to impress other people on how smart they think they are. I say what you have done is a terrific way to support a car on its 4 tires! Keep up the great content!
I made some last year the exact same way, had my car on them many times and never had any issues, nor have I ever been concerned about them when I was under the car. They’re a solid design
My Dad was a lumber guy his whole life…i learned that good quality plywood has similar strength characteristics to steel, hence a lot of houses used to have laminated wooden beams not steel…however that being said you could strengthen your design one better by inserting blocks in the gaps front and rear where the tires rest…they may not have made Any noise, but when you set the Dodge on , they certainly flexed and sagged.
I've only been watching your channel for a few weeks. I'm building some cribs for my own projects because I know they are strong and capable of dealing with 99% of what I need to do. I won't be putting them under my full size bus but I'll come up with something else for it. EDIT: I have a good face for radio and a great voice for mime.
I've built a couple sets of these blocks. My current ones are basically a 16x16 inch cube. I usually use them working on my NA Miata but my Silverado 1500 and V8 4Runner have been on them with no issue. I prefer them over any jack-stand.
Check out Detroit Speed’s build pages. They use these under everything. I built a set for my car when I had it. Only change I made was I added an extra 2x4 somewhere in the middle of the stack to eliminate the middle from wanting to expand, if that makes sense. They would be much safer painted red 😁
I've supported houses on 2x4 cribbing with no screws . no screws as we are raising and lowering 1 board at a time cribbing starts with 6x8 's up to around 6 to 7 feet Hight then 4x6 then 2x4 and 2x6 down to wood shims . and i don't have any idea what a house weighs .
agree, used to set Mobile homes / Trailers in my younger days, would trust Cribbing blocks over the Metal stands that was was the final support. Never saw a Cribbing block collapse but have seen metal stands collapse when you forgot to get all of them out before lowering the trailer
I have been using the same style wheel cribs for years and have never had an issue. I like the way I can design them to fit what I'm working on. For instance, when i do an oil change on my c5 corvette the front end needs to be lower than the rear due to the drain plug location at the front of the motor. I have 2 different heights of cribs that allow full drainage of the oil. I refuse to use jackstands unless i am taking the wheels off and I only use a 6 ton. I have seen too many videos of 3 ton stands failing lol.
I wonder if anybody actually tried to evaluate the balance between the compression and tension forces in the cribs, or just reacted emotionally. Oh, btw - when I had to get my F-350 frame straightened after getting hit, the guys used BROWN cribs not PINK when they put the new-to-me quarter panels on. I just don't know if PINK will work. ya know.
I found that you can make your cribbing in several sections like Lego blocks. Make them so they lock together as you stack them. This way you can have different heights to work with. Still having stability in the stack.
What i struggle with is that the car initially was not welded while sitting on tires? The entire production would have it sit on a conveyor belt attached to the frame or monoco?
I can't believe some of those awful comments, but that's the social media world we live in now. I like what you're doing. Those cribs look very strong. I guess most people don't understand physics and engineering.
Question......When cars like this were originally built at the factory..... How did they build the body first and then mount it to the frame when the car was not put together the way you are doing it and everything seemed to turn out ok when done differently at the factory..... How did they do it compared to the way you are doing it?
😂 they'd have had an aneurysm if they had seen the ramps I built for working on my junk.. I had a pair of 12' LVL laminated beams (14" wide, 3" thick) supported by a structure very similar to what you show. Those ramps lived outside in a dirt driveway for 4 years, and the neighbor asked to buy them when I moved! I let him have them, had no desire to lift them. Had about 24" of rise in 12' run, was plenty easy to get on and off of. I miss the space too, regular oil change ramps are only like an 8-10" rise..
Furniture dollies use the same type of construction from 2x4's, and are advertised to hold over 1000 lbs. You basically stacked 5 or so furniture dollies, and if each layer can potentially hold 1000 lbs, I'd say 5000 lbs per crib? Give or take lol.
People are just plain mean, and it speaks to their own bitterness and general poor image of themselves. You have a unique voice, but that's the way God made you and there's absolutely nothing wrong with it. I enjoyed the two videos of yours I've seen so far. The guy who took the low blow at your voice should put his money where his mouth's been running and make his own content. I wish I wasn't becoming so cynical about humanity.
The shear strength of whatever screws he used, the weight of the car changes the downforce and changes the friction it would take for them to... explode? I'd probably glue and screw them with small blocks glued in the gaps. This seems safer than jack stands and applies tire weight more evenly.
If the cribs should fail, and I hope not, you could always say, "Well, it looked like a good idea." I would start to worry if my wife said something like this, "Dear, are your life and car insurance payments up to date?"
These guys would all lose their minds if they saw my wooden dyno ramps and platforms. LOL. Yes, I dyno tune cars on wooden ramps to get it up to the height of my dyno.
It's not that I don't know what it means. I know exactly what an axis is. An axis is like a centerline, but it's only for cylindrical objects. These wheel cribbing stands do not possess an axis at all. Thus, this man's comment makes no sense.
I don't recall learning about weak axes in statics. I do recall a lot of vector calculations of forces acting on moment arms and ideally rigid, material agnostic objects. Being that they are ideally rigid objects and flexing or bowing is not even a consideration, the weakness of one axis over another is moot in that context. So if we're nitpicking, I wouldn't reference statics. Also, you don't need a university education to know how to be kind. One of these days I'm going to follow through on my resolution to stop reading comments and responding to them. I'll be happier for it.
2:48. If my understanding is correct, the original commenter is stating that the second moment of area of a rectangular section (i.e. of each piece individual piece of 2" x 4" timber) is greater when loaded and sitting on its narrow 2” side rather than when sitting on its broader 4” side (like your cribs). When sitting on the 2” wide edge, the timber’s ability to withstand load is improved. In this case, with the individual pieces of timber at their current length, they have adequate cross section to not fail under the loads applied (and therefore the bending stress induced in the 2” x 4” pieces). Increasing the length of each individual piece of 2” x 4” will increase the stresses in each piece of timber. That aside, I like the concept and plan to build a pair.
It really amazes me that there are so many "experts" out there! Seems there is no shortage of people trying to impress other people on how smart they think they are. I say what you have done is a terrific way to support a car on its 4 tires! Keep up the great content!
Thanks Ron. People are very commonly just not very kind to each other online, and I don't understand why.
Everyone's an expert. Difference between mechanics and engineers... Mechanics put stuff to the test while engineers mostly discuss about it
We're all experts here. 😊 We say things on the Internet that we'd hopefully never say to our neighbors and friends.
I made some last year the exact same way, had my car on them many times and never had any issues, nor have I ever been concerned about them when I was under the car. They’re a solid design
My Dad was a lumber guy his whole life…i learned that good quality plywood has similar strength characteristics to steel, hence a lot of houses used to have laminated wooden beams not steel…however that being said you could strengthen your design one better by inserting blocks in the gaps front and rear where the tires rest…they may not have made
Any noise, but when you set the Dodge on , they certainly flexed and sagged.
I've only been watching your channel for a few weeks. I'm building some cribs for my own projects because I know they are strong and capable of dealing with 99% of what I need to do. I won't be putting them under my full size bus but I'll come up with something else for it.
EDIT: I have a good face for radio and a great voice for mime.
Retired boat builder here. Used this style of cribbing to support power boats for years. Never had a failure or any safety concerns.😊
I've built a couple sets of these blocks. My current ones are basically a 16x16 inch cube. I usually use them working on my NA Miata but my Silverado 1500 and V8 4Runner have been on them with no issue. I prefer them over any jack-stand.
Check out Detroit Speed’s build pages. They use these under everything. I built a set for my car when I had it. Only change I made was I added an extra 2x4 somewhere in the middle of the stack to eliminate the middle from wanting to expand, if that makes sense. They would be much safer painted red 😁
I've supported houses on 2x4 cribbing with no screws . no screws as we are raising and lowering 1 board at a time cribbing starts with 6x8 's up to around 6 to 7 feet Hight then 4x6 then 2x4 and 2x6 down to wood shims . and i don't have any idea what a house weighs .
agree, used to set Mobile homes / Trailers in my younger days, would trust Cribbing blocks over the Metal stands that was was the final support. Never saw a Cribbing block collapse but have seen metal stands collapse when you forgot to get all of them out before lowering the trailer
I have been using the same style wheel cribs for years and have never had an issue. I like the way I can design them to fit what I'm working on.
For instance, when i do an oil change on my c5 corvette the front end needs to be lower than the rear due to the drain plug location at the front of the motor. I have 2 different heights of cribs that allow full drainage of the oil.
I refuse to use jackstands unless i am taking the wheels off and I only use a 6 ton. I have seen too many videos of 3 ton stands failing lol.
I wonder if anybody actually tried to evaluate the balance between the compression and tension forces in the cribs, or just reacted emotionally.
Oh, btw - when I had to get my F-350 frame straightened after getting hit, the guys used BROWN cribs not PINK when they put the new-to-me quarter panels on. I just don't know if PINK will work. ya know.
I don't trust pink ones. EVER!!!!1
I found that you can make your cribbing in several sections like Lego blocks. Make them so they lock together as you stack them. This way you can have different heights to work with. Still having stability in the stack.
What i struggle with is that the car initially was not welded while sitting on tires? The entire production would have it sit on a conveyor belt attached to the frame or monoco?
I use them for my cars too. No issues for the past couple years.
I can't believe some of those awful comments, but that's the social media world we live in now. I like what you're doing. Those cribs look very strong. I guess most people don't understand physics and engineering.
Question......When cars like this were originally built at the factory..... How did they build the body first and then mount it to the frame when the car was not put together the way you are doing it and everything seemed to turn out ok when done differently at the factory..... How did they do it compared to the way you are doing it?
Right... because manufactures don't use a single jig...
@@I_Am_Your_Problem The only thing I can think is that the tolerance's/ gaps were much greater maybe and they did not care.....
@@TheGregWallace Honestly, any time I see an all original car, I'm unimpressed. The body lines are usually poor, and sometimes awful.
😂 they'd have had an aneurysm if they had seen the ramps I built for working on my junk.. I had a pair of 12' LVL laminated beams (14" wide, 3" thick) supported by a structure very similar to what you show. Those ramps lived outside in a dirt driveway for 4 years, and the neighbor asked to buy them when I moved! I let him have them, had no desire to lift them. Had about 24" of rise in 12' run, was plenty easy to get on and off of. I miss the space too, regular oil change ramps are only like an 8-10" rise..
I bought the MyLiftStand made with steel and I have a video on it if interested.
Furniture dollies use the same type of construction from 2x4's, and are advertised to hold over 1000 lbs. You basically stacked 5 or so furniture dollies, and if each layer can potentially hold 1000 lbs, I'd say 5000 lbs per crib? Give or take lol.
😀
People are just plain mean, and it speaks to their own bitterness and general poor image of themselves. You have a unique voice, but that's the way God made you and there's absolutely nothing wrong with it. I enjoyed the two videos of yours I've seen so far. The guy who took the low blow at your voice should put his money where his mouth's been running and make his own content. I wish I wasn't becoming so cynical about humanity.
I appreciate that.
Haha a lot of Amateur comments in cribbing 😂
"Don't know how true that is"...ok lol, stopped watching right there. Good luck with that setup.
The shear strength of whatever screws he used, the weight of the car changes the downforce and changes the friction it would take for them to... explode? I'd probably glue and screw them with small blocks glued in the gaps. This seems safer than jack stands and applies tire weight more evenly.
If the cribs should fail, and I hope not, you could always say, "Well, it looked like a good idea." I would start to worry if my wife said something like this, "Dear, are your life and car insurance payments up to date?"
You don't know what "...in bending along its weakest axis" means? What kind of engineer are you, electrical? This is freshman level statics
I USED TO OWN A 1970 ROADRUNNER AND EVERY TIME YOU JACKED OT UP YOU HAD TO REALIGN THE DOORS
These guys would all lose their minds if they saw my wooden dyno ramps and platforms. LOL. Yes, I dyno tune cars on wooden ramps to get it up to the height of my dyno.
I don't know how else you would make them. I have seen 100's made this exact way. If it was an issue we'd all know about it.
You don't know what "...in bending along its weak axis" means? What kind of engineer are you, electrical? This is freshman level statics
It's not that I don't know what it means. I know exactly what an axis is. An axis is like a centerline, but it's only for cylindrical objects. These wheel cribbing stands do not possess an axis at all. Thus, this man's comment makes no sense.
I don't recall learning about weak axes in statics. I do recall a lot of vector calculations of forces acting on moment arms and ideally rigid, material agnostic objects. Being that they are ideally rigid objects and flexing or bowing is not even a consideration, the weakness of one axis over another is moot in that context. So if we're nitpicking, I wouldn't reference statics. Also, you don't need a university education to know how to be kind. One of these days I'm going to follow through on my resolution to stop reading comments and responding to them. I'll be happier for it.
2:48. If my understanding is correct, the original commenter is stating that the second moment of area of a rectangular section (i.e. of each piece individual piece of 2" x 4" timber) is greater when loaded and sitting on its narrow 2” side rather than when sitting on its broader 4” side (like your cribs). When sitting on the 2” wide edge, the timber’s ability to withstand load is improved. In this case, with the individual pieces of timber at their current length, they have adequate cross section to not fail under the loads applied (and therefore the bending stress induced in the 2” x 4” pieces). Increasing the length of each individual piece of 2” x 4” will increase the stresses in each piece of timber. That aside, I like the concept and plan to build a pair.