I have a 42" x 84" x 2" thick slab tabletop made of parota wood. I have a conventional tavern table base with aprons and stretchers that is made of walnut. I plan to use buttons to attach them, but have a few questions first.
The wood is fairly soft, "Like redwood heartwood" as somone has described it, and not great at holding screws. So I ordered some heavy duty 3/4" long threaded inserts from McMaster-Carr http://www.mcmaster.com/#90192a124/=9qdei6 for use with 1/4-20 capscrews that I have from my speaker-building projects. I was thinking of adding epoxy to the inserts before screwing them into the wood. What do you think?
I was going to use the buttons in the aprons to account for wood movement. Here is the question on that---if this slab is 42" wide, how much "growth" in width do I need to account for? I ask because my aprons are 1" thick walnut, in which I will route out a dado. Can i safely put a 1/2" deep dado in a 1" thick apron? If I do that, and have the lip of my button 1/4" in the dado, am I limiting myself to 1/2" total movement in width before the button bottoms out in the dado?
Any other suggestions or alternatives welcome.
Thanks