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    Cantilevered Table design question

    Scheduled Pinned Locked Moved Woodworking
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    • TIGT Offline
      TIG Moderator
      last edited by

      You could just buy a ready made cheap standard flush-door blank that'd be much the same size [2'6"x6'6"?].
      If it's hollow/semi-hollow cored and you want a more substantial top, then glue a sheet of ply/mdf over it.
      If it's not already lipped on all edges the pin/glue some hardwood lipping on the exposed edges...

      TIG

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      • mitcorbM Offline
        mitcorb
        last edited by

        I believe, after installing this table, you will eventually be adding legs to the free corners due to sagging and deflection, cyclical loading, wood shrinkage, and localized material fatigue at the fasteners.

        I take the slow, deliberate approach in my aimless wandering.

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        • J Offline
          Jonavery16
          last edited by

          @mitcorb said:

          I believe, after installing this table, you will eventually be adding legs to the free corners due to sagging and deflection, cyclical loading, wood shrinkage, and localized material fatigue at the fasteners.

          @Mitcorb- The table top has an overhang of 1" on the sides and 4" in the front. If anything wouldn't the sagging occur in the unsupported span in the middle? Which really gets back to the question at hand, how big of a span can I have without additional supports?

          @DaveR Of course, that makes sense. I don't know what I was thinking. Thanks.

          @TIG the problem for me with a hollow core door is the attachment points for the lower supports are going to be in the middle of the face of the door. I would need to find a way to attach the door without protruding through the top of the door panel.

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          • TIGT Offline
            TIG Moderator
            last edited by

            A flush door, even hollow-cored, has solid wood as rails and stiles and mid-rail/blocking out...


            01-hollow-core-doors-architectural.jpg

            TIG

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            • J Offline
              Jonavery16
              last edited by

              Modified the model to reflect suggestions


              Exploded View.JPG

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              • J Offline
                Jonavery16
                last edited by

                @tig said:

                A flush door, even hollow-cored, has solid wood as rails and stiles and mid-rail/blocking out...

                I knew it had some solid wood for the door hardware, based on the image it looks as if the solid wood pieces at the top and bottom of the door are roughly the same dimension all the way around. I suppose it would depend on manufacturer but that would work.

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                • mitcorbM Offline
                  mitcorb
                  last edited by

                  Ok, just don't let "Aunt Bertha and her Holstein Revue" dance around on it. Do yourself a favor and replace the section of gypsum wallboard on the studs with equal thickness of plywood to be covered by the wall mounting plate. Then use lag screws from hell to attach the assembly to the studs. Also, place an intermediate gusset like the end ones and use clip angles to secure these gussets at the wall plate.
                  There will be sag/deflection--it's just a matter of degree. How much can you put up with after the effort?

                  I take the slow, deliberate approach in my aimless wandering.

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                  • J Offline
                    Jonavery16
                    last edited by

                    My Aunts gonna be pissed she can't dance on this one...

                    Thanks for the suggestions re: mounting procedure.

                    This project is slowly becoming a big pain in the ❗ ❗ ❗

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                    • pbacotP Offline
                      pbacot
                      last edited by

                      45 deg. Angle braces might work besides legs, but you need solid connection at the top to the wall, such as lag bolts. I've seen drafting tables built this way (that will fold down with a hinge). (that's how old I am--I've seen drafting tables.)

                      If you have a source or want to go to the trouble for a sleek look. Steel angles are used bolted to the sides of studs to provide hidden support to counters that are open below.

                      MacOSX MojaveSketchUp Pro v19 Twilight v2 Thea v3 PowerCADD

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                      • mitcorbM Offline
                        mitcorb
                        last edited by

                        Maybe something like this:
                        http://www.amazon.com/John-Sterling-BK-0103-22-300-Pound-Capacity/dp/B0009SUWEW/ref=sr_1_12?s=hardware&ie=UTF8&qid=1333217520&sr=1-12
                        I just think to be safe, use no less than three brackets like this for the length of the table. It would be preferable that the horizontal arm reach at least 1/2 the width of the table from wall to front edge. Those fasteners have to resist pullout from Aunt Bertha, or, perish the thought, Uncle Bubba.

                        I take the slow, deliberate approach in my aimless wandering.

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