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Old 01-09-2013, 11:42 PM   #16
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Also, Forgot to mention the beam will be 15ft. unsupported it will be more like 17 ft. total length, but 15 of it will be unsupported. What size? No real snow load, southern oklahoma.


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Old 01-10-2013, 07:55 PM   #17
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Because some of your roof load is supported by the frame walls above, resting on the flat roof, you have a special situation that may require a structural engineer. You have more than ceiling loads. The SE would give the fastening requirements of the new roof added above the flat one, especially at the joist/rafter connection for shear thrusts as well as uplift resistance. And, the paper trail would appease the local AHJ (with new permit for structural changes), and help with your HO Insurance carrier, if a future claim from this work. He/she would take liability for the beam, bearing, fastening, shear, etc.

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Old 01-21-2013, 10:07 AM   #18
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So I have engineers drawing up a plan. However, the first thing they said to me was..."I'm not sure you're going to be able to remove that. I just don't see how." Umm...you are a structural engineer are you not? Problem solve! So eventually he suggested some beam options claiming it needed to be steel, which I disagree with. Then he said, well yea we could probably do LVL. So long story short, I felt like I had to exert extra effort just to get him to think outside the box and give me some options. Needless to say, I did some thinking on my own after he left.

I drew up a few figures on what my situation looks like. Look at previous pictures to see the situation in person. There is the one wall in the center of the room, the wall in question. I have built two walls on either side approximately cutting the room into fourths. From one new wall to the other is 15'. The ceiling joists are 2x8s running from one exterior wall to the middle wall doubling over in the middle. Instead of running a beam perpendicular and trying to fasten joists to it, could you not run new 16' 2x8s sistered onto each joist from one new wall to the other? The only problem I see with this is a bit of a sag in the middle due to the roofers framing down onto the middle wall making it load bearing (duh). But as far as just holding up the ceiling weight, 2x8s can span 15' yes? So then as far as taking care of the sag, could you run a beam alongside the middle of the roof supports coming down onto the wall, maybe a 2x12 or 2x14 on each side of the 2x6 supports sadwiching them together with 2x6 in between and lag bolt them so that the beam is carrying most, if not all, of the roof support weight, thereby eliminating the extra load on the joists enabling them to be carrying ONLY the ceiling weight, (no storage on top). Seems like its pretty simple to me. But, I am no engineer. So give me your thoughts about this system and if it won't work. I don't want to do it wrong, I just want to do it without steel, and without hiring it all done. Thanks so much. This site is awesome.


P.S. In first drawing, highlighted wall is the wall to be removed, green dotted lines represent pier and beam locations or foundation walls. If you need me to explain anything else let me know. Anxious to here everyone's thoughts.
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Last edited by Huggins90; 01-21-2013 at 10:21 AM. Reason: FORGOT PICS
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beam size , header , load bearing , rafter thrust , span

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