Or was that a Holiday Inn Express?
Anyhow, if you look at a Mission style table or most any workbench, there is a perimeter frame to which the legs are attached, screwed, mortised, or by other means secured, as opposed to just screwing a flange to the underside of the table surface. There is a reason for the frame, it triangulates, to a small degree the lateral forces applied when bumped or in moving the table. While not having very long "legs" on the triangle, the frame still constrains the movement and changes the forces from tension on the screws of the flange to a distributed load on the frame members, thereby increasing the rigidity greatly. So, without a Sketch or a Drawing it's difficult to know what the OP is proposing with his legs. Any bracing from leg to leg will help greatly and the further down the better, to increase the "triangulation" As most engineers and savy woodworkers know a Triangle
is unmovable unless the joints fail. A Rectangle
, whose joints act like hinges, is far less stable and relies solely on the ridgidity of the joints themselves, not the strongest method, but in some designs the only one. Even less rigid
is the flange and post leg where all the forces are concentrated at the screws into the table. So, based on all this a mock up in scale will tell you alot unless your design is the flange and post. In that case make one leg and flange and screw it to a suitable wood plank and try to bend it or "rip" it off. Design by failure will tell you alot. See what bends, strips, shears etc.then make it bigger, use fatter/larger screws and try again. Unless you want the thing to fail while in use this is the only way I know, but maybe there is a software program to meet your specific design, tubing and size specifications. Beats me.
The work bench below is a beautiful example. Nice work!
Join Date: Aug 2008
Location: Omaha, NE
Finally, after about an 8 month start to finish process of researching and building, it done! May not be the best bench ever made but it suits me great. Its made from Douglas Fir with Watco finish and 3 coats of paste wax on the top. Let me know what you think, and what I can do better next time (many many years from now).