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Excellent question Richard. I show 115" from the hole with the concrete dust on it to its counterpart on my install. I could just get my C6 up in the air with this spacing but I doubt my C8 will fit and I don't even want to try it. Additionally I can get my daughter's Infinity uip on the posts as well.
there is a huge forum in the 'garagejournal' on MaxJax. Here's my post
looks good, what is your ceiling height and how thick is the concrete? This is one of those things that I've had on my list for a long time.
Ceiling height is constrained by the rafters and garage door. So maybe 8'. I did change the horizontal sweep of the garage door to be slanted to clear the antenna.
The concrete was maybe 3" thick, 50 years old and cracking. I dug out, re-enforced and re-poured an H-shaped foundation. Look here for details:
Sorry, Ignatz. I did read your post, but I don’t have access to computer at the moment nor my glasses. I had thought originally you made yours to fit a C6 not a C3 but apparently your C3 fits also.
Hay,, sorry, life got in the way. A new grandson is here...
So mine is 8'5" appart at the base plate. It's fine for my C3 and C5. It's in a small one bay garage but it's a life saver. I have four lifts at work shop so if I need room I'll go there.
I used these bolts because they exceed the specs from MaxJax for anchors and are re-useable. I used 4.5" at home. I have these longer ones for thicker concrete. I've used this style for decades in construction without issues.
Just my ideas to make installing and removing easier....