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https://www.metalroofing.com/spirit/comment/6638/find/
Yes, there are companies producing retrofit steel framing systems for this purpose. One of our member companies, ATAS, does this.
A system of metal trusses, etc. will be lower weight than wood but it might be possible to build a wood system as well.
It might be wise to involve a structural engineer to get their opinion.
9/7/2005
Isaiah Industries, Inc.
9/7/2005