Shop Made Car Stand
Shop Made Car Stand
(OP)
I have attached a jpeg of the referenced subject matter. I am to suggest that a load limit be posted and is to be based on an analysis from a structural PE. There would be two other stands of different designs and one of them with worse conditions, for the structural PE to evaluate. So, would the structural engineer be willing to take on the task? Yes, after repairs are done; No regardless how well they were repaired would sufficient replies for me as I am trying to determine some consensus. I have my own thoughts on this matter, however, I'll reserve that for the moment so as not to prejudice the comments. I'll post a second photo on the next link.






RE: Shop Made Car Stand
RE: Shop Made Car Stand
Note: Would the design be to AISC or AASHTO?
RE: Shop Made Car Stand
As for the second, that, at best, is jerry-rigged, and should be scrapped itself. There is no design, little to no stability, but just adaptation of something that was available with no alterations, other than the already damaged members.
Mike McCann
MMC Engineering
RE: Shop Made Car Stand
Was this posted on April 1????
RE: Shop Made Car Stand
As far as the positioning of the wrecks on the stands, I was not really concerned since the weight of the engines far offset the overhanging weights over the trunk area.
I will be recommending about scraping these car stands and have shop made ones based on a design from a structural PE whose additional responsility will be to inspect the works during fabrication.
RE: Shop Made Car Stand
Mike McCann
MMC Engineering
RE: Shop Made Car Stand
it may be callous but "caveat user".
you could bring your concerns to the owner (i'd anticipate a brief response).
would only employees be under the wrecks ? or general public (looking to buy a component, removing a component) ?
you could mention this to OSHA (suspect they're busy running down "real" issues)
otherwise, wait for the ambulances and the lawyers to gather (suspect there won't be much in the way of "lawyering" ... the yard mgmt/ownership will probably just disappear, i doubt they'd declare bankruptcy).
Quando Omni Flunkus Moritati
RE: Shop Made Car Stand
Scrap them and get new ones built to spec.
RE: Shop Made Car Stand
could you refurbish the obvious bad pieces, add some braces to the deep webs, and test the rigs ?
i guess you wouldn't dye penetrant inspect the welds ? maybe just brush the scale off and have a look ?
Quando Omni Flunkus Moritati
RE: Shop Made Car Stand
I'd throw in a significant factor of safety, to allow for abuse, over loading, etc. I assume these are loaded with some form of fork lift or loader with forks that may cause significant rack damage in the process of loading. Who knows what all might happen down the road. They even may try to set a big truck up there, or make them the base for a yard crane system. The general idea is open to abuse, such as the car falling off due to stupid operation of the loading equipment.
I'd look for some reject oil field pipe, as we use for foundation piling, and make it hell for stout. The client seems good at finding salvaged steel. No PE seal or designer ID should be found on site later with that gang.
It still is such a situation that law suits down the road may happen and walking away now would be best for your future reputation and livelihood. Miss use is likely.
RE: Shop Made Car Stand
The next most expensive outcome _should_be_ getting caught with crap like that and being fined by OSHA or similar. I haven't seen that work as a deterrent, but YMMV.
The auto enthusiast magazines carry advertising for two-post and four-post lifts, all of which are cheaper than a custom design for a fixed stand from a PE should be. Most of them look reasonably sturdy, and as a bonus here, can raise and lower the wreck for better ergonomic access to various parts. Most of them should require site prep like a modest slab.
Mike Halloran
Pembroke Pines, FL, USA
RE: Shop Made Car Stand
That’s a junk yard and those stands are junk and should be treated as such. This just goes to show you, that anyone can do anything, as long as they set their small minds and expertise (in their small mind) to the task. The one proviso should be that it only fall on them. Maybe they would learn something then. Unfortunately, other people could be hurt too. Any real engineer who would try to make something out of those should have his head examined.
RE: Shop Made Car Stand
RE: Shop Made Car Stand
I have one in my garage that I paid $2300 for used and will hold 7000lbs.
I would run away from this very quickly.
RE: Shop Made Car Stand
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Shop Made Car Stand
RE: Shop Made Car Stand
RE: Shop Made Car Stand
The first one looks like it is fixable, by eye the I beams need some web stiffeners. Since people are working under it it should be physically tested to 4 times the maximum lifting capacity of the crane that loads it in both compression and tension, and you should also consider lateral loads.
The second is just scrap metal waiting to fall over.
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: Shop Made Car Stand
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?