Load capacity for a machine on a concrete slab.

[Lanza]

I require some help for load capacity on a concrete slab.
I currently have a lathe on a 100mm concrete slab
I'm going to assume its 30mPA
It has mesh in the concrete, but I don't know what size.

I'm a machinist by trade so someone with knowledge in civil engineering might be able to point me in the correct direction.

Load capacity= slab thickness * concrete stength * area coverage
LHS plinth load capacity= 0.100* 30 mPA * (0.406*0.470)
0.573mPA

RHS plinth load capacity= 0.100* 30 mPA* (0.406*362)
0.441mPA

I want to place 8 plates underneathe the corners where there are jacking screws.
I was planning on using 165x165mm plate at least 25mm thick.
Weight of the machine is 1.2 tonnes, the heavier end is the LHS where the head stock is. I don't know the difference in weight.

My question is what area size should my 8 plates be underneathe the lathe?

 

[Lanza]

Continuing from my last post.
Assuming the headstock of the lathe is 800KG.
In the worst case scenario only two jacking point are touching.
400kg one point
30 MPa concrete
0.57 design compression strength of concrete I got from the internet. (if someone could explain this part to me)

Area=Force/Pressure

Area= (400*9.81)/ (0.57*30)

Area= 229.47mm^2

Area= 15.15x 15.15 mm

I was going to use 165x165 mm steel plate listed in my first post.
Can someone confirm for me if this makes sense.

Then next there is the load bearing capacity of 800kg over the area (0.470x 0.406m) which I'm having trouble working out.

 

[JAE]

I'd suggest you hire an engineer locally for this as you are coming on here and asking for free engineering design services - or at the least, asking someone on here to provide you with semi-design guidance, which is not the point of this site. If you practice in engineering doing this sort of design and you need feedback, references, etc. then OK - but it appears you know nothing about slab design, subgrade effects on slabs, etc.

Just go hire an engineer and you'll be much happier.