![]() ![]() You want strong and cheap and light and thin? You're asking for a lot. You can get lighter by making a laminated shelf with honeycomb in between. but it won't be that cheap, or all that thin. You can get cheap and light by adding a couple of stringers along the bottom as stiffeners, but it won't be all that thin. You could use something other than wood so it's thinner, but then it won't be cheap. so that only leaves one alternative that I can think of - you didn't say that it had to be flat. Yes, it'll be a whole lot of work, but if you got think sheets, and glued and clamped it to laminate it into an arch, it'll transfer the load laterally as it took the weight, so the weight gets transfered better to the ends. Of course, when you factor in all of the adhesive, it might not be as cheap as just going with a thicker piece of heavy plywood, and it's going to be significantly more work, and be much less practical in the end, but it'd at least get three of your four desired qualities.Īs for the span limits. It depends on the material used, number of layers, final thickness, and the amount of arching. I just had another random thought on this. Yes, it's thicker, and you'd have to get them just the right length, as you can't trim 'em down too much, but the construction would make it quite stiff. it's actually similar to the honeycomb idea. (well, and for epoxied applications, it also keeps them from being able to separate or move closer together) the honeycomb isn't to give strength, it's to make sure that the top and bottom layer are a distance away from each other so they can take a better moment. ![]() It looks like the Home Depot near me sells various widths of "Wood Unfinished Flush Slab Door", all 80" tall (a hair over 2m) for $21 (18" / ~46cm wide) to $33 (36" wide) I don't know what the ultimate load-bearing capacity would be, though. if you need to strengthen it further, I'm guessing it'd be best to laminate another layer on top (both to stiffen the compressive layer against deflection, and to provide durability if someone drop something heavy on it. which is a little more work than adding a stiffener to a piece of plywood.Ĭheap, super strong, and hidden.that's going to be tough. Given that equation, you'll have to sacrifice somewhere and I'd suggest investing in a lot of time and labor. I'd look into taking down all the sheetrock/plaster. ![]()
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