sci.physics

In article < @ >,
rb608 wrote:
>On Sep 21, 2:37 pm, ady...@ (Al Dykes) wrote:
>> Forces scale by the cube of the size of the model.
>
>WTF? Which forces? Wind, seismic, live load? Either way, I'm
>curious as to the supposed relevance.
>
>> That means if you made an exact replica of a WTC tower 10 feet high,
>> the forces involved in the real tower would be about 1,000,000 times
>> (100 times 100 times 100) greater than scale would suggest.
>
>Again, WTF? I don't know any structural engineers who build a model
>then scale up the forces. I'm still not seeing your point.



If a box-shaped building is twice as big the volume is 8x, (ie cubed).
All the beams have to be longer and heavier and in turn all the beams
that support those beams need to be heavier. It multiplies.









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