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Attaching a Floating Counter to the Wall
Question
  Forum Responses
From contributor D: Where the 3" slab meets the wall, leave a 2" x 2" void in the thickness of the top, nearly full length. Make a 2" x 2" cleat to fasten firmly to the wall and slide the shelf/top onto the cleat and fasten from below. I usually make the tops as a torsion box - mostly hollow - so they have less real weight, but look massive. From contributor J: I usually build hollow also for two reasons - the weight and for support. I usually install an angled piece of steel tube. 90 degrees, bolt to stud in wall so only the horizontal piece is coming out (length varies depending on top depth) at top height so as to insert into void in top and provide support. Of course this is only an option if you can open the wall then patch and refinish, but it is the best way to provide the most support. We have a local shop weld two pieces at 90 degrees at whatever length we need in the biggest size we can use. Bolt to stud and slide top in. Tubing stays hidden in wall and inside top. From contributor C: When you are gluing up the bamboo, you need to create voids crossways to slide onto weldments that can screw to the studs prior to sheetrock. It will need to be as small and strong as possible. Steel 3/4 x 3/4 heavy stock welded together and screwed in place. These can be positioned to miss the plumbing and sink. From the original questioner: Thanks for all the suggestions. I am going with a torsion box design and then having some tubular steel welded up to insert in the open back of the box. Would you like to add information to this article? Interested in writing or submitting an article? Have a question about this article? Have you reviewed the related Knowledge Base areas below? 
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