![]() My understanding is similar to what you wrote in your first post here, Willie. While another beam would be more labor intensive, it might give more piece of mind. I'joist are cheaper, but i'm not sure how those work for elevated platforms since they're not treated.would i have to skirt the permiter? So for a 20-24' cabin it almost becomes a wash. Going from a 2x10 to a 2x12 is an extra $30 per 16' board. Regardless, adding a 3rd beam would be about $250 in lumber, $50 in tubes and $80 in concrete and maybe $75 in beam anchors. If i'm doing a 16x24 cabin say, is the 16ft or 24ft dimension considered the "width" on the beam chart below? Quoting: jsahara24For a cabin this wouldn't be terrible.if it was my house I would bump it up a size. Why to the support beams need to be out at the ends? Cant you move them inward to reduce the span and cantilever the outer sides? Iirc there is a spec on cantilever allowed. I have 2x10s for a 13'6" span and I can feel a bit of a bounce sometimes. I'm not positive about your interpretation of the span charts, but I can speak from experience that 16' is to far for 2x10s. Regardless, i'm just to get confirmation that i'm reading these span charts correctly. Guess i didn't since they aren't treated. Gcrank1 My scenario above is for the main floor.not the loft.Īklogcabin I haven't look at i-joist. I may make a short one at one gable end just for some storage of seasonal stuff (which is always at a premium in a smallish cabin). If it is basically a sleeping area with no dancing or parties.storage of light stuff vs anvils?įwiw, We had a loft as part of the living space in our old one, not in the new one and Im glad, though we had ladder access not stairs. Solid floor good bouncy floor not as good.īouncy ime is relative depending upon the load and use. Havth you cecked out enginered joists such as TJI or BCI ? I did 16' TJI on 16" centers with a center support 3/4" TnG plywood on top and am very happy. I can tell you a 2X10 spannsuch 16' will be bouncy. Total length, span plus the supported ends. Would it also be correct when i say that my span is technically less than 16' because it would actually be the distance between the 2 beams? If i go to lumber ratings chart, it looks like a No.2 2x10 has a normal duration of 1210 and a modulus of 1,600,000. Now if i look at the span chart for those requirements, it looks like a 2X10 with a 1,500,000 modulus and a Fb of 1202 would work. If i look at the load requirements chart, it says floor joist need 40 live, 10 dead and a L/360 deflection. If I use treated lumber from my local Menards, their website specs it as southern yellow pine with a #2 or better grade. The joist will be running in the 16' direction and supported by 2 beams, each near the the end of the joist and rim board. Scenario: Elevated platform for a 1 story cabin with loft that will be 16' wide by 20 something long. So i think i have this span chart thing figured out, but i want to confirm. Small Cabin Forum / Cabin Construction / Help me understand span charts ![]() Forums - Register/Sign Up - Reply - Search - Statistics. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |