Hey everyone, relatively inexperienced woodworker here. I’m looking for a reality check on a pedestal table design I’m about to build. I’m worried about stability, particularly the propensity to tip over or shear the top from the pedestal. The client is my gf’s mom, so if this goes wrong I look forward to hearing about it at every holiday for the rest of my life. Pics attached.
It’s all ash. The top is oval, 1 5/8″ thick, 6′ x 3′, made of dominoed 4-5″ wide boards with alternating ring orientation. The pedestal column consists of an X-shaped tapering column (5″ across at the base, 3.5″ at the top) sandwiched between two hexagonal pieces (bottom hexagon is 3.5″ thick, top is 1.5″ thick). I’m planning to run a threaded rod through the column to lock these parts together and screw the rod into a threaded insert on the underside of the table.
Also under the top is a substructure of 1.25″ thick ash (not quite an apron) that screw/dominos into the top along the long axis. Elsewhere, I’m planning to attach the substructure into the top using something that accomodates expansion. Hopefully this should be sufficient to keep the top from warping, which should be minimal anyway.
The feet are 20″ x 3″ x 1.5″ and are dominoed into the bottom hexagon. They extend the X shape of the central column — if they were on a clock face they would hit the 2, 4, 8, and 10 (60, 120, 240, and 300 degrees). I’m considering adding weight to the underside of the bottom hexagon but haven’t decided that one yet.
I really don’t want to make a table that tips over or falls apart if someone sneezes on it. Any advice would be greatly appreciated.