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fire protection of steel beams

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I am looking for a specification for the 1-hr fire protection of steel beams with a spray-on application.
Also, does anyone know if a steel beam completely concealed in a 1-hr floor/ceiling assembly of wood joists, rated drywall, and concrete flooring over p.w., require additional fire protection, or is it okay as it is completely covered by the other assembly?
Pat Clark, P.E.