|Forum topic by Wingstress||posted 05-27-2014 11:33 PM||677 views||0 times favorited||3 replies|
05-27-2014 11:33 PM
Ok so I’m going to make a large cherry breadboard table with walnut ends. The cherry center sections are going to be about 7feet long and the bread board ends will be about a foot wide. Because the breadboards are so large the legs will be supporting the table via the breadboard. So I’m worried about the excessive moment I’ll be exerting on the tongue and groove. The stock is 1 inch thick but I haven’t joined and planed. I don’t know the shear stength of cherry so I’m considering reenforcing the joint with a steel plate. It is a dinning room table so I’m not expecting a huge load on it and because the bread boards are supported by the legs I’m not worried about someone using the end of the table to stand up. I’m just worried about someone putting full force in the center of the table.
So is there a proportion or rule of thumb for the moment exerted on a tounge and groove? Is a steel plate necessary?
-- Tom, Simsbury, CT