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Magnetic attraction between conductor and I-beam

Magnetic attraction between conductor and I-beam

Magnetic attraction between conductor and I-beam

(OP)
How does one calculate the attractive force between a conductor carrying a DC current and some nearby steel?  We have a bus bar carrying 25000 amps next to a steel I-beam and need to figure out how much bracing we need to put between the two.

Thanks in advance for any help.

RE: Magnetic attraction between conductor and I-beam

There's no simple equation.  One usually resorts to finite element modeling in a situation like that.

RE: Magnetic attraction between conductor and I-beam

Equation 6.3 here gives the force between a conductor and a steel plate.  This could serve as an upper  bound for the forcew between a conductor and an I-beam at same distance
http://www.consult-g2.com/course/chapter6/chapter.html

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