Lift Pad Locations?

[Codyboy]

No. The rebar is only there (in a new slab) for crack control. If your slab didn't crack after 30 days of cure, then you don't have a problem.

Rebar is not a requirement, it is just insurance against cracks forming outside the saw cut joints.

Bendpak's old instructions 10+ years ago called for 4" slabs with no reinforcing. These were the actual minimum requirements, but they left no room for mistakes or a fudge factor. (The bolts need that full 4".) The new BP specs are good practice and if you really dig deep in to the threads here, you'll find many people recommending rebar and going over 4" to give this room back in the day.

If you have any uncertainty, you can call BP customer service and they should provide you the same assurance. (We have had other threads with the same concern and they have confirmed the same for other members.)

I am basing my questions on bendpaks requirements for existing slabs which state size and spacing for rebar.

So I don't understand you saying no rebar is required unless its a new slab.
They have even more stringent specs for new concrete.
Here is a screenshot of the spec.

 

[ericm]

To circle back, I just got off the phone with VCS's tech support. Before I called I took some measurements. The crack I mentioned that's on the outside of one of the pads is also on the outside of a saw cut. The bay has a 12' door. The saw cuts run from the inside corner of the posts on either side of the door the length of the bay to the other side of the building. The concrete guy wanted to run cuts from the post locations as that's where the slab wants to crack. The cuts are 142" apart. Since the crack is outside the saw cuts, the cuts are the most likely to interfere with a lift whose posts are between the saw cuts.

A Challenger CL10AV3's posts in normal configuration are wide enough that they would end up on top of the saw cuts. In narrow config it's still pretty close. So that's out. But I'd planned for a Forward I10 when the cuts were being specified. The I10 can be installed in narrow and wide configurations. Narrow it's 131" between outside edges of the base plates. Wide is 137".

Forward has specs for three different kinds of fasteners. Two are threaded rods for use with epoxy. Those require thicker concrete than the Hilti Kwik Bolts, which require 4 1/4". Their spec for distance to an edge is 3 3/8". Adding 6 3/4 to the base plate width gets me 137 3/4 for narrow or 142 3/4 for wide. I read all this to the guy on the tech line and he's like yup, if it meets the spec it's good. I also verifed that using the narrow config won't be a problem with a 3/4 ton truck. Most of the time I'll be working on smaller vehicles and the narrow config will give me more reach with the arms, so it was what I was planning anyhow. So it looks like I'm good.

I just dug out the saw cut diagram I'd made and it looks like I assumed the cuts would be at every 10' from the gable end. That would have put a cut down the middle of the bay, no where near the lift. When the contractor wanted to make the cuts from the posts, I forgot that the saw cuts from the posts framing the door would be close to the lift posts. It's a good thing it worked out.