Hilti HIT instead of concrete anchor

[Slarvpellen]

Planning to mount a scissor lift for cars for which I received M16x120 expanders, 4 for each scissor. Instead, I want to use Hilti HIT chemical anchors, which ones should I reasonably use?

I understand that one actually needs/should calculate it, but I don't have access to data from the lift manufacturer on the forces used in their dimensioning and design.

If one were to just estimate a bit? Would HIT-Z M16x155 do the job? Setting depth about 125-130mm? HIT-HY 200-A V3 injection mortar.

I guess the scissor lift is relatively balanced on its own, meaning most cars could be lifted without fastening the lift at all? (Obviously, you can't lever the car just any way because then you risk it tipping over, of course). So maybe not as sensitive with these attachments as, for example, a 2-post lift...?

 

[Nissegandhi]

I am going to mount a scissor lift for a car that I received M16x120 expanders for, 4 for each scissor.
Instead, I want to use Hilti HIT chemical anchors. Which should I reasonably use?

I understand that one really needs/should calculate it, but I don't have access to data from the lift manufacturer about the forces used in their dimensioning and design.

If you were to just estimate? Would HIT-Z M16x155 do the job? Embedment depth like 125-130mm?
HIT-HY 200-A V3 injection resin.

I guess the scissor lift is relatively balanced as such, i.e., most cars could be raised without fastening the lift at all? (Of course, you can't just lever the car any way you like because then it risks tipping, obviously)
So maybe not as sensitive with these attachments as, for example, on a 2-poster...?

If you were given M16x120 expanders with the lift, then someone has probably calculated that they will hold. I don't see the point in changing, personally, I find expanders easier to mount. Do you have a thick enough slab for a 130 embedment depth?

 

[Matti_75]

Ask Hilti and they will help you. They have the best knowledge about their stuff.

 

[Slarvpellen]

If you received M16x120 expanders with the lift, then someone probably calculated that it should hold. I don't see the point in changing them; personally, I think expanders are easier to mount. Do you have a thick enough plate for 130 embedment depth?

The expanders have an embedment depth of about 95mm, the reason I don't want them is because I poured about 70mm since I made the recess too deep when I cast the slab, so the expander will "work" roughly where the topping is. You could use longer expanders, of course, if you'd prefer that. I think the topping turned out pretty well, but I would definitely still like all the fastening to be in the original casting... belt and suspenders! The total concrete thickness is btw ~175 + ~70.

 

[Slarvpellen]

Ask Hilti and they will help you. They have the best knowledge of their stuff

They are super helpful but they want loads to calculate on, while the lift manufacturer's only response (no matter how I ask in my amateur way) is 120Nm. (Of course, tightening torque for existing expanders but not what I want to know).

 

[Nissegandhi]

They are super helpful but they want loads to calculate on, while the manufacturer's only answer (no matter how I amateurishly ask) is 120Nm. (Naturally, this is the tightening torque for existing expanders but not the information I want).

If you have two castings, it's entirely correct to attach to the lower one. Hilti, like you, wants both belt and braces, but they should be able to compare pull-out values. On construction sites, they like to test if there is any doubt.

 

[Slarvpellen]

If you have two castings, it's absolutely correct to attach to the lower one. Hilti is like you in that they want both belt and suspenders, but they should be able to compare pull-out values. On construction sites, they like to test if there's any doubt.

I asked them about HIT-Z M16x155 and got back HAS-D M16x220 as a suggestion due to lack of load data (belt and suspenders), these are about 2-3 times more expensive and also I might not necessarily have the space on top if it builds too much.

This is what my lift looks like: https://jemaautolifte.se/cdn/shop/f...r_lift_JA6001S_1_1.jpg?v=1759214026&width=640.
If you zoom in, you can see the bolt holes; they are located inside the lift, but there is perhaps at least 50-80 mm when it is lowered...

But the thing is, maybe I shouldn't fuss and just pay up; it's an investment of a few thousand today and secure tinkering for the coming 20-30 years...
Better safe than sorry!

 

[Nissegandhi]

I asked them about HIT-Z M16x155 and got back HAS-D M16x220 as a suggestion due to lack of load data (belt and braces), these are typically 2-3 times more expensive and besides, I don't necessarily have the space above if it builds up too much.

This is what my lift looks like: [link].
If you zoom in, you can see the bolt holes, they are, so to speak, inside the lift but there is maybe 50-80 mm when it is lowered...

But the thing is that maybe I shouldn't fiddle and it's just a matter of paying up, it's an investment of a few thousand today and peace of mind for the next 20-30 years...
Better safe than sorry!

There are others who can expand Essve, check with someone else.