The span or the length of the room that a 2x10 can cover is not solely dependent on the wood itself. How Much of a Span Can 2x10 Support on its Own? This article lists the maximum span of 2 x 10 under different situations for varying species of lumber. These values apply to Southern Pine Species. A 2x10's maximum span depends on where it's used.Īccording to IRC 2021, a 2x10 with 16-inch spacing can span up to 18'-9" as floor joists, more than 26' as rafters and ceiling joists,4'-3" as beams, and 7' as headers without providing additional support. Oh well, I don't think that had anything to do with anything, but it was a fun day in the woods. The smaller limbs of all the hardwoods will be cut to ~ 4', dried, and go to make charcoal. Need to find shitake spores tonight and get them ordered, there was enough crown in the oak to make a mushroom farm. The poplar I took just below it and the many dying locust, a short lived colonizer, have about 50 rings, they came in after that last harvest and is the third forest by my reckoning. Over the years since the rings have again tightened up as the stand filled in again. another harvest opened up light to the stand, the white oak was too small at that point to be taken. The rings are tight in the first half century and then they explode in width in the late 50's/ early 60's. It is about 120 years old, so from the age it began growing in the late 1800's and for here it is likely truly a second growth tree. Todays logging was kind of neat, I got the butt log of the big white oak down to the mill. I hear you, I'm trying to get something built here and am swimming in the bycatch. I can get some good prices on local Amish-cut hemlock, but if I have to pay to get them graded, there goes my savings. Also, if I get them local rough cut, I suppose the inspector could demand they be professionally graded. Not sure if going with the 4圆's would work just sticking to code. I am trying to stick to code as much as I can so I don't need much PE review (right now, just for my ridge beam, I think). I could run the calculator (and probably will when I get the chance), but as you say, won't mean diddly to the inspector. Since I plan on T&G 2圆 flooring for the loft floor (exposed to below), I think things would look much nicer if I have 4圆's spaced oc instead, possibly rough cut. You agreed that 2圆's would meet code, but I would have to have my " eyes wide open" to the fact that it would be flexy. Quote from: Don_P on April 16, 2013, 10:57:21 PMīut not in 4X center being equivalent to 2X center?Īs you may recall, I had to drop to 6" floor joists in order to meet the (somewhat arbitrary to me, but whatever) code requirement that 50% of my loft be greater than 7' in height. A live load only check should come out mighty close on deflection, the controlling factor in this type of member. a total load check will show mine conservative in deflection, you'll fail earlier on mine. You can run a check of that by opening the awc spancalc, run a scenario and then plug their design values into mine. Use the dimensions 3.5 x 5.5 and enter 1120 for the load, click "show result" and deflection will pass. However, the way deflection calcs are really done by engineers is to check deflection on the live load only not on the live + dead load. Use nicer, denser stock and the Fb and E numbers will go up a bit. You'll get a fail in deflection, one way is to bump the dimensions to rough sawn and it works. One of my calcs for this type of problem is here (won't mean diddly to an inspector) There is a 15% strength increase when members are spaced 24" or closer together that we can't take with widely spaced timbers. There is a flaw in my logic of a 4x center is equivalent to a ctrs.
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