Weight Distribution

That's about a 10 gage(3.5mm) galvanized steel sheet.... what is the measurement of the machine HXWXD? The weight is already spread out nicely with 4 ea 5' round pads....what is the floor limit you speak of?

http://www.engineersedge.com/calculators/flat-plate-deflection.htm

Solar Eagle,

The machine is 7.5"x7.75'x7.0'. The floor is 5" concrete rating 5500 psi. It has double row rebar with good packed soil under.

So it's a steel slab...?

....sorta like this? that's about 2,827 sq inches per 5' pad...

That would make it, on those dimensions and weights, a density of 6634kg/m3.

The ground pressure of an object that footprint and weight is lower than the rating of the concrete below it, therefore any support pads are not needed; the thing is its own support pad.

Either that, or something is wrong.

It's not my field, but my math says that the loading is about 178 lb/sqft. I would think that a 5-inch thick concrete slab could easily handle that.

For a very few dollars you're also on 2' square steel plates. Seems like cheap insurance.

What size are the feet that sit on the drip tray?

Vibration?

Damp topsoil will handle that!

I think that's 178 lbs per sq inch....still should be no problemo...

If the pads are 5 feet in diameter, area is about 19.6 sqft for each pad, 3500/19.6 is about 178 lb/sqft.

5 inches in diameter....

Not knowing what the function is of this said machine is. You said, "The machine rest on 4 pads that are 5' diameter." The .138 thick drip pan will not have enough strength to really help to distribute the weight.

As JE asked, what size are the feet? Also as JE stated, forget the bean counting and go for the insurance of the 2' square plates, so that the weight will be distributed evenly.

One more question, how thick are these 2' squares?

Not so nimble fingers, the pads are 5 inches diameter. I planned on the 2 foot square plates to be 1 inch thick.

If the shape is as in 3⇑ then with the weight stated it is already inside the concrete pressure rating without any intervening pad or plate. In which case, is the current level of worry justified?

So you're loading 5500 psi concrete with 178 psi.

I don't think you have a problem.

That drip pan is a drip pan, not a machine support. You really need to go back and think this over from the start. Are you stating that the drip pan extends the entire length and depth of the machine? No pads heavier that 0.138" for weight support and distribution? I suspect you need to get the OEM manual and read carefully the machine set-up section for the first time.

James,

I read the manual from cover to cover and talked to the builder. No help. The only information I got was the foundation is to have a load capacity of 2,000 kg/m sq.

If the shape in 3⇑ and the weight are correctly described, then the item is inside that rating at 63% of it without any intervening plate or even concrete.

Either that, or something is wrong.

What we have here,, is a failure to communicate....

Really? It looks like an obese vehicle on stilts and an idiot from here; "the camera never lies" _{- Anon}.

Shhh....those kind of trucks are essential to business and ranching and farming in Texas. Not so much in Merry Old.

Not sure I go along with having that type of truck lift, although it is probably safer than a single hydraulic pedestal.

Presumably the stilt assembly comes with it so the prospective owner can cope with expected repeated breakdowns?

That must be why there are so many old Dodge trucks seen on Texas highways.

Yes oddly enough it weighs 14,000 lbs....