Dynamic Loading of Switchboard on Civil Foundation

As a <...11kV Switchboard...> does not move, the concept of a <...dynamic load...> is abstruse.

What you need to know is the STATIC Load.You must know the weight of the switchboard,and it's footprint on the floor.

You have to know the structural capabilities of the floor...

https://codes.iccsafe.org/content/IBC2018/chapter-19-concrete

https://codes.iccsafe.org/content/IBC2015/chapter-16-structural-design?site_type=public

If there is seismic activity going on then there's a lot more to worry about than the <...Dynamic Loading of Switchboard...>!

As others have said, dynamic loads are calculated based on your seismic zone, while static loads are calculated based on your wind zone.

I don't know where you live but here in the southern US, we use the Southern Building Code (among others) for the equations.

This is normally provided by a structural engineer.

When you drop the switchgear on the floor and great big cracks appear you know you’ve exceeded the static loading limit.

BTW, it isn’t fun when you’re stood on the floor when it cracks. Our company’s structural engineer had given the go ahead for about 5 tons of new gear in to an old switchroom. The switchroom roof had been removed so we could crane the gear in. Two MCC panels went in without any problems, when the main switchboard landed the cracks appeared. There then ensued a mad panic to add a steel frame in the basement to support the switchroom floor.

Then there was the hotel in downtown Rochester,NY that had a swimming pool installed on the upper floor.After the building was complete,they realized they could not support the weight of the water,so it just sat there,an empty testament to the left hand not knowing what the right hand was doing. By the way, a woman in high heels will exceed the dynamic loading of many buildings.

A dynamic load is a load in motion,regardless of the source. A static load is a stationary load. Dynamic loads are calculated on all buildings and structures,especially bridges. Wind and snow are considered dynamic loads. Seismic activity creates great dynamic loads and must be a factor in calculations in certain areas of the world.

Answering the second part first, "Is there a Standard reference?", yes. A simple matter of looking up the codes for your location. Snow, wind, earthquakes, cyclones etc. will all place dynamic loads ON THE STRUCTURE HOUSING THE SWITCHBOARD.

The switchboard itself will be static therefore dead-load only on the slab/foundations.

Then the first bit "How to calculate the dynamic load ...", note I left off the "of say" because it doesn't matter. Refer to the code/s applicable in your location and see the standards used in your location, be they the BS, Eurocodes, AS/NZS, ACI, IBC or whatever is applicable where the switch board is being installed.

So there is a world of information out there - you just have to look, and pay attention.

BTW if you are American SolarEagle earlier that referenced two documents you really should look at.

Is this and SF6, air break, vacuum bottle, oil filled breaker. If it is air break, then you will have a dynamic loading. but I seriously doubt it will be air break. Probably SF6 with spring mech closing, so there will be a slight dynamic loading during closing and opening of the breaker.