Timeline for Will my table top hold 300 lbs?
Current License: CC BY-SA 4.0
18 events
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| Oct 11, 2020 at 19:08 | vote | accept | Trevin Avery | ||
| Jun 22, 2020 at 18:22 | history | edited | FreeMan | CC BY-SA 4.0 |
Said "edge grain", meant "end grain", as noted in the comments
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| Jun 22, 2020 at 6:27 | comment | added | Graphus | "Would flat edges be stronger than tongue and groove edges when glued?" Completely depends on grain orientation. If the blocks are intended to have grain alternating at 90° you have to (have to) reinforce in some way for a table. If the grain is not alternating then each long grain | long grain joint is, or should be, stronger than the wood around it. Testing shows that glued joints are ignored during breaks, so they are at least as strong as the wood around then, and further, sometimes cracks stop when they reach a break, meaning they are literally stronger than the wood (in any species). | |
| Jun 20, 2020 at 16:48 | comment | added | user5572 | Follow-up questions like "what is end-grain" (a fine question, BTW) should be made into their own stand-alone Q&A. See if there is previous Q&A about that. If not, feel free to ask that simple, but useful, question. | |
| Jun 20, 2020 at 16:46 | history | edited | user5572 | CC BY-SA 4.0 |
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| Jun 20, 2020 at 16:39 | comment | added | user5572 | I added a section specific to what I think is a major design flaw. If you think about your slab as a series of 1x3 sections joined together to make a large slab, you can see what I mean. Just rotate your picture 45 degrees and ignore the rectangle of the table ends. | |
| Jun 20, 2020 at 16:37 | history | edited | user5572 | CC BY-SA 4.0 |
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| Jun 20, 2020 at 16:33 | comment | added | Trevin Avery | If I changed the design to have staggered joints and just use flat edges instead of tongue and groove, how much would that increase the strength? Would it likely be enough, or would it still sag? | |
| Jun 20, 2020 at 16:30 | comment | added | Trevin Avery | What exactly is end-grain? Is it any edge that is not parallel with the grain? Is deflection the same thing as racking forces? | |
| Jun 20, 2020 at 16:25 | comment | added | user5572 | Commercial trestle style legs will be fine, assuming you get them positive connection to the slab top you need. It all depends on how stable from deflection and stiff the top is. | |
| Jun 20, 2020 at 16:23 | comment | added | user5572 | Flat edges, if glued up appropriately, would be very strong. The only caveat being that many of the joints would involve end-grain. Take a look at Ikea slabs made from softwood: where they have end-grain joints, they have sandwiched that joint between two other pieces. That is, they never have non-staggered joints. In your case, all you have is non-staggered joints, some of them end-grain. My gut tells me you will not get the strength you need. | |
| Jun 20, 2020 at 16:16 | comment | added | Trevin Avery | Would flat edges be stronger than tongue and groove edges when glued? I didn't mention leg mounting because I was planning on using prebuilt electric lifting legs like these. I don't think there is anything I could do if they can't handle racking forces. | |
| Jun 20, 2020 at 13:58 | history | edited | user5572 | CC BY-SA 4.0 |
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| Jun 20, 2020 at 13:38 | comment | added | FreeMan | This is pretty close to becoming the cannonical "Will my table be strong enough" answer. It's got specifics on marquetry, but will apply to them all and can either have that removed or have sections added to cover other construction techniques. Most importantly, it nicely covers legs and racking which all newbies seem to forget about. We should either copy/pasta or just point to this guy for all future questions of this sort. +100! | |
| Jun 20, 2020 at 3:32 | history | edited | user5572 | CC BY-SA 4.0 |
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| Jun 19, 2020 at 18:48 | history | edited | user5572 | CC BY-SA 4.0 |
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| Jun 19, 2020 at 18:42 | history | edited | user5572 | CC BY-SA 4.0 |
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| Jun 19, 2020 at 18:36 | history | answered | user5572 | CC BY-SA 4.0 |