I'm putting a jack post to support a beam in an addition per the approved plan, there is a footing already under the concrete floor for it, and i'm using lag bolts to secure the top to the beam. to secure the bottom plate to the floor do I need to use a sleeve anchor? can I get away with masonry nails? is there another option I'm missing? thx!
Since you have an approved plan, there should be a note on the plan describing the required method of attachment of the jack to the floor. If there is no description, call the designer or the building inspector. Typically for a retrofit, the designer will want either epoxied in place bolts, sleeve anchors, or an expansion anchor, but they might accept a Ramset type anchor. Doubt that masonry nails would be acceptable.