How can I design the foundation for 3 storey building?

i want to draw the foundation design details for 3 storey building. Without knowing the loads how can i design the foundation, means what will be the

i want to draw the foundation design details for 3 storey building. Without knowing the loads how can i design the foundation, means what will be the depth,width and thickness of that foundation?.

or:i want to draw the foundation design details for 3 storey building. Without knowing the loads how can i design the foundation, means what will be the depth,width and thickness of that foundation?.

or:For secure and safe long term planning, you can use foundation vent covers while making foundation of building.

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