How to lift concrete slab? 5

[KimWT]

Hello!

I have to lift 5 ton roof precast concrete slab of elevator shaft to repair.
Isn't there any jackup tool to raise slab only 10" temporarily through 1/2" horizontal joint between this slab and elevator walls?
(Crane cannot access this area.)
This elevator shaft is located at the perimeter of parking structure and about 60ft tall;
two sides are attached to the parking deck.
I am looking for practical solution.

Thanks!

 

[BridgeSmith]

I like that video 3DDave. I worked on project remodeling an old farmhouse, where I was just the teenager 'grunt' laborer and the structural engineer they had on site leveled up the entire house with wedges of 2x4s. He cut some 200 wedges and pounded them in with a sledge hammer various amounts, raising it as much as 3" to compensate for the foundation settlement. It could work here, but there's surely less time-consuming ways, such as the approach you suggest in your post.

 

[OldBldgGuy]

I'd go with TME's original suggestion, but do what sreid says: tell the riggers this is how I'd do it but you guys go ahead and get me the lift I need. Really, with a decent contractor on this one the engineer is just there to calm the other parties down.