Modifying joists for Bendpak style lift

[The One]

I've seen where a few of you guys have modified your trusses to accommodate a Bendpak lift.

A lift is honestly a few years out for me, however I am looking to insulate and heat my garage next summer and want to "plumb in" anything that I expect to be needing/wanting while the walls and rafters are still exposed.

I have Fink trusses (aka. "W trusses") spaced approximately 16 inches apart (my guess, I'd need to measure to be sure) so there is a nice area where, if I removed the joists, a car could fit up into. On top of that, I have 13ft ceilings so with my Jeep on the lift, I won't need to go too high into the ceiling but would like to be able to stand under it.

Some factors are that I am in Northern WI so think lots of snow. I would also like to put a partial flooring for storing things in the attic space so a large bulge up will take away from that storage. The garage is 30x32.

What am I looking at by removing 4 or so joists? How big of an opening should I make to accommodate the most cars/trucks?

I found this resource about how to frame it: http://www.renovation-headquarters.com/ceiling-floor-entry.html

This image shows the idea I'm going for:

 

[Falcon67]

LOL, look at my Weaver W-9F thread. However, I built using rafters rather than trusses which are somewhat easier to chop up. There is another thread here about how one guy really boxed in his truss cuts - I'll see if I can find it.

Here:
http://www.garagejournal.com/forum/showthread.php?t=48251

Found another over on the bullet

http://www.yellowbullet.com/forum/showthread.php?p=11576402

 

[Falcon67]

Also, 8' is about the minimum for lifting an normal size truck - say F150. Mine will just fit through an 8' overhead door with the ears folded back.

 

[The One]

I measured. My ceiling is sitting at 11.5 feet, shorter than I thought.

If I stick the posts between joists, do you think there will still be enough lift on most cars and trucks to be worth it?

 

[brownbagg]

need to stick your head up there and see what you got, the tray ceiling might be a fake ceiling that you could take the whole ceiling down

 

[The One]

need to stick your head up there and see what you got, the tray ceiling might be a fake ceiling that you could take the whole ceiling down

Brownbagg, I don't have a ceiling in yet. The 11.5' is from the concrete to the bottom of the joists.