Floor load requirement for factory

[Seb77]

Hello,

I am not an engineer but I hope you could help me.
I am looking to move a factory in Asia and I have to provide information about the floor load required.

I found some info online but the results I got from my calculation seems strange, I would like you check with you if you see any issue :

The heaviest load in our factory are injection machines and warehouse racks

Injection machine :
- 8400 kgs
- installed on 8 round pads of 125mm radius each.

Surface all pads = (pi*0.125^2) * 8 = 0.3928 M2
8400 / 0.3928 = 21385 kgs / M2 = 210 kn / M2

Full storage rack :
- 25 tons with load
- on 12 legs (0.0133 M2 / leg, total surface legs 0.1596 M2)

I find : 171000 kgs / M2 = 1677 kn / M2 !

According to what I could find online, my results seems anomaly high (I should find value more around 12kn / M2, but again I am not certain), do you see an issue in my calculation or conversion ?

What is normally the floor load for a typical industrial site or warehouse ?

Thanks for your help

 

[human909]

Your results are normal for point loads. You should not treat point loads as a uniformly distributed load. They are different with different requirements.

For storage racking here is a reasonable guide applicable to AS3600.

https://www.ccaa.com.au/documents/I...nts_Design_Construction_and_Specification.pdf

 

[LittleWheels]

Floor loads are often distributed loads, usually uniformly distributed loads e.g. imagine a large container full of water covering the factory floor.

There may also be concentrated or point loads. Lift that imaginary water container onto supporting columns. That is the loading that you have calculated.

The two loads can't really be applied at the same time and your direct comparison of the two types of loading isn't correct. You actually need to compare the effects (i.e. bending, shear, etc.) on the structure from the two types of loading. This sort of thing doesn't look to be your speciality.