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Old 04-12-09, 08:28 AM
Al Stevens Al Stevens is offline
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Join Date: Apr 2009
Location: San Francisco Bay Arae
Posts: 2
What Size Steel Beam?

I am adding 600ft to my ground floor home. We have Adobe clay soil and I just completed a pier and grade beam foundation. The piers were drilled to bedrock at 10ft and the grade beam is 8" thick.
I am planning to frame my floor joists using 2x8 lumber which will be set on top of the foundation on 3 walls and joist hung off the existing house foundation on 1 wall.
I have one long span of 21'-6" that will need a perpendicular support. The span of the support is 23'-4" and I would like to use a steel beam rather than adding anymore footings into adobe clay soil.
Can anyone advise me on the size of steel beam I will need to order. It will span the entire length of 23'-4" and be supported on each side by attachment to my new foundation.
Thank you for all suggestions.