I am planning on using a 1.5" deep, 5-ply bamboo board (sample pictured) as a dining tabletop attached to a pair of steel legs (pictured, width 20", height 29", length 2").
The board dimensions will be around 80" by 36" and the span between the two leg pairs will be around 62", leaving overhangs of 7" lengthways and 8" widthways. I'd like some advice on the necessary sub-structure (if any) to support the table.
I'm assuming normal C channels running widthways won't be necessary as it's a stable board not planks with grain. Options I've considered are
- 2 steel L profiles either recessed into the tabletop or just screwed to the underside, running lengthways
- similarly, a recessed C channel running lengthways
- an apron made from additional plyboard pieces end-on.
I'd be interested in opinions on these options or anything else I've not thought of.
If using L profiles or C channels, should these be attached to the legs or would it be better to attach the tabletop to the legs directly? Would recessing profiles have any benefit over just screwing them to the underside face? Any benefit to C over L?
If using an apron, ideally this would be no wider than the legs and not visible when the table is in use. I don't think this could connect into the legs as I wouldn't want to raise the height of the table so not sure if that reduces the utility of an apron?
What is the main issue I should be concerned about and seeking to address with the substructure: board bowing / pressures forcing leg pairs apart / other?
All thoughts much appreciated.