Reason for Offshore Equipment Plinth

[Java999]

Hi!

When an equipment installed on offshore platform usually it is not bolted directly to the deck steelwork.

First a plinth (a structural frame) bolts down to the deck and then the new equipment installs on the top of the plinth.

As far as I know it is good practise to do so, but why I do not know.

Could anybody list reasons for installing of equipment on plinths.

Thank you in advance!!!

 

[BUGGAR]

What is the equipment? I've seen this done to set the equipment at a more precise elevation. Or for utilities out the bottom. Or to match the anchor bolt locations of the equipment to the framing below. Or to better structurally mate the equipment to the supporting steel below.

We love pictures.

 

[Java999]

Thank you BUGGAR
Any equipment, I am asking just in general.
So, as far as can see manly to:
-pick up bolting of equipment frame;
-to maintain certain level of the equipment;

I also thought if packing is required for levelling and equipment installed without plinth in this case equipment own frame will span between packing which is may be not good. But if we use a plinth it can be levelled first and designed for spanning between packing. And in this case equipment will sit flat on the plinth. See attached sketch.

 

[andriver]

The main reason equipment is on a "plinth" or as I would refer to it, a "skid", is so that you can lift it off/on quickly and as a unit. Often an entire equipment system is more than just one bulky item (like a motor), but an entire system placed on a steel skid that is meant to be lifted. Efficiency working offshore is extremely important due to the obvious challenges.