Our client has a old transformer that is powering an electric arc furnace. They want to replace the existing transformer with a larger one (over 100 MVA). The field generated by the existing unit induced currents in the elevated concrete floor slab reinforcing bars that raised the floor temperature to a little over 100 degrees F. We are replacing the floor with cast in place concrete and non-magnetic rebar. A question came up about also possibly using steel beams to support the floor. Will currents be generated in the beams and cause them to heat up as well (assuming the floor is about 12" to 18" thick)?
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