anchoring 2 post lift, How did you do it? Options

[Calwaterbear]

Ok time to set-up my new/used 2 post lift. I poured a 14'X 25' pad, let it cure for 3 weeks.

So I will drill into the concrete and use 3/4 X 10'' wedge anchors. they will be 8" deep.

obviously the holes need to be drilled in exactly the right places, not only for each post, but also, the 2 posts have to be set at the exact width (dictated by the bar across the top, between the 2 posts).

so do i set up the posts, bolt on the top, then drill down through the feet?

Or use a template, put in the anchors, then drop the posts onto the anchors?

Bit of an issue is i am working alone, and even with a bobcat 763, i have not figured out a way to get the posts vertical yet, i plan on calling in my propane guy, who has a real live Ferrari crane on his service truck to lift em upright and position them.

Tech guys at Greg Smith say to drill the holes a couple of inched deeper than you will be anchoring at - so if you screw up, instead of having to cut off the anchor - you just drive it down in the slab. That seems like a good idea, but what if, while lowering the post, you miss and hit the top of the anchors, that would probably drive them down into the slab - No?

I'm probably overthinking this, but I'm hoping to draw from the experience of others who have gone before me on this venture!

[914_teener]

Potential issues:

1. Wrong size bit.

2. Rebar

3. High strength or large aggregate.

4. Hole not straight or not round.

5. Concrete dust in the hole.

My quess is that a 4 or 5 inch long anchor is more than enough.

11 inch.....naw.

See it happen ALL the time.

Your.re just good Mark.

[Mark Henry]

Your.re just good Mark.

Nope, being good had nothing to do with it. That's why I rented a Hilti, which is a big ass pro hammer drill.
14 holes, seven per side, I don't even think it took me 15 minutes to drill all the holes.
I think it was $40 for 4 hours. I bet it would even go through rebar. The right tool for the job.

(IMG:http://www.914world.com/bbs2/uploads_offsite/maxcdn.toolboxbuzz.com-26-1497014028.1.jpg)

[914_teener]

Your.re just good Mark.

Nope, being good had nothing to do with it. That's why I rented a Hilti, which is a big ass pro hammer drill.
14 holes, seven per side, I don't even think it took me 15 minutes to drill all the holes.
I think it was $40 for 4 hours. I bet it would even go through rebar. The right tool for the job.

(IMG:http://www.914world.com/bbs2/uploads_offsite/maxcdn.toolboxbuzz.com-26-1497014028.1.jpg)

You are right. The OP never said he used a hammer drill.....can.t imagine using a regular drill....but that is just me.

No wonder it took him so long.

In my work sometimes we use these for siesmic anchoring so there is engineering and inspection behind it. For a two post lift I.d be most concerned about overturning moment and the dead loads. So in other words the post foundation thickness and the embedment length of the anchors.

There was a picture somebody posted which showed rebar in the concrete but it was flush to grade. Ideally...the rebar should be dobied off the grade at least a couple of inches.

......and use a hammer drill for the holes or wet set j hooks on templates for the lift.