Support 1000lb Soapstone Overhang?
Brent B
12 years ago
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12 years agoclarygrace
12 years agoRelated Discussions
Soapstone dilemma re mounting sink and overhang
Comments (5)Our fabricator told us that it is very difficult to cut soapstone thinner than the standard without breakage. We wanted a thinner piece for our kitchen window sill, but ended up increasing the space for the sill, rather than decreasing the thickness of the soapstone. I would definitely talk to a soapstone expert about this, rather than the cabinet maker. Can you post a link to a picture of your island sink?...See MoreISO What You Used To Support Your Soapstone Overhang..
Comments (3)Sorry I can't help with materials. But you need to get this engineered - an experienced installer should have been able to do this for you. Without getting too technical, since gravity is acting at a 90 degree angle to your horizontal surface, the moment is basically the weight (force of gravity acting on the dense soapstone) times the length of your lever arm (the max overhang of 20"). Ignoring the fact that the weight is evenly distributed over that 20", let's be conservative and say the moment is the entire weight (OK, let's say just the middle half) times the 20". So that would be about 4ft x 2ft = 8sf x 22 lbs/sf = 176 lbs x let's call it 2ft unsupported = 352 ft-lbs of moment or torque just to support the middle. The sides being shorter would have less moment so need less support, as of course the whole thing if you cut it like you're considering. I would say that if you could live with a single leg in the middle that was capable of supporting 400 ft-lbs, you would probably be OK. Two legs centered between the edge and the arc would be even better. If you want brackets to hang this off of, we need an engineer familiar with materials characteristics (rolled steel vs wrought iron, etc.) to tell you the material and the size of the bracket. I'd say (but this is really a SWAG) for the middle you'd need something that supported at least a foot's worth of that 20" overhang (if you stay with it), but I don't know how far down the wall it would have to be (attached to stud) so that the torque didn't push the bottom leg of the bracket right through your drywall....See MoreMy Soapstone Overhang Is Falling - So How Was YOUR Day?
Comments (10)Yes, put something under the central arc to temporarily support it so that it won't break off. If you can't think of anything else, get a barstool and stack books or bricks or something on it until it reach the height of the bar and slide it under the arc. If you have a digital camera, post some pictures so the collective brains on this board can offer you their wisdom as to possible solutions. And, if at all possible, get your GC and KD and installer and the metal fabricator all over to look at the problem at the same time. Each of them probably bears some portion of responsibility here so they might as well all be in on determining the solution and figuring out which one(s) are going to pony up the $$$ to fix it. But, as long as your soapstone doesn't crack while you're waiting to get this resolved, fixing it may be a bit of a little hassle but probably should not be too outrageously expensive....See MoreHow to support 15 inch soapstone overhang in 8 foot island
Comments (19)Please see the thread below (but do not post any questions, etc., on it. If it doesn't answer the OP's question, the OP should continue to post here. If it doesn't answer anyone else's questions, please start your own thread and don't hijack mommytofive's thread.) From the thread, "Stone Information and Advice (& Checklists)": Countertop Support - depth: If your granite is 2 cm thick, then there can be no more then 6" of of unsupported span with a 5/8" subtop If your granite is 3 cm thick, then there can be no more then 10" of unsupported span - no subtop required If you need support, to determine your corbel dimensions: Thickness of Stone - Dimension of Unsupported Span = Corbel Dimension e.g., an 18" total overhang in 2 cm would require a 12" corbel; the same overhang in 3 cm would require an 8" corbel Countertop Support - length: A corbel or support every 30" of unsupported overhang Ask your fabricator to look into "Counter Balance Brackets". They offer support without being obvious. At least one company, "Chemical Concepts" has them. http://www.chemical-concepts.com/marketsegment/product/view/135/countertop-fabrication/counterbalance/9/) http://www.chemical-concepts.com/media/pdf/CounterBalance%20Product%20Guide.pdf...See Morebeekeeperswife
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