Originally posted by Alan Coles:

1 - Unless they have a properly setup exhaust system close to the base of the pit there is a real danger of gas vapours collecting in the bottom of the pit and any spark can set off a deadly blaze.



I suppose this could be a problem if you left the vehicle running while doing the alignment. Other than that that isn't an issue.
Originally posted by Alan Coles:

2 - If there is a fire or if something falls from the vehicle above, there is at most only 2 directions of escape versus at least 6 with an above ground lift. Many of the pits that I've been in and seen had only one entrance/exit.



The ones I use have two entrance's one on either side of the car, and its acutaly three levels realy. One level goes underneath, the two steps on either side lead to a level that puts your head even with the fender, than a step up to get into the car or on the hoist. But yes it ultimatly does not have the escape route of a two post hoist, but than again you don't have to worry about the car falling, and you could climb the wall all around to get out in case of major fire. But point taken
Originally posted by Alan Coles:

As I said there are some jobs that they're better suited to than an above ground hoist but I've just not seen one in sooooo long.




Thats very true there are alot of things I can not do on those hoists. Just surprised you don't see any around up there.

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