Re: sims 3
@stargazer1000 I've moved your post to the Sims 3 PC tech section.
Are you talking about the Miner that sims can build with a high inventing skill? If so, you might be able to place it using buydebug. Go to Edit Town, click on the junkyard, select Build/Buy on this lot, bring up the cheats console (ctrl-shift-C), enter "testingcheatsenabled true" without quotes, then "buydebug on" without quotes, and click on the category with the question mark. Check both the Buy and Build catalogs, as some buy objects only show up in the Build category for some reason. Be sure to undo the cheats (buydebug off, then testingcheatsenabled false) when you're done.
If that doesn't work, you could try having your sim family buy the junkyard and then place a Miner or two. Once your sims own a venue, you can add items from the household inventory to the lot.
If you're talking about some other object that's not in the game, you'd need to ask about mods or custom content on another site. I don't know of any similar objects, but you could ask at NRaas or Mod the Sims; maybe someone there will have a suggestion.