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Must be an east coast thing
On May 9, 1:43*pm, wrote:
On Sun, 9 May 2010 10:02:02 -0700 (PDT), Loogypicker wrote: When I asked the engineer, he said this was far stronger than any number he would ever come up with in computations but that was what the county expected to see so that was what he spec'ed. I ended up with a 16' beam (8x16 concrete) with 2 #5s and 4 #7s in it. It only carries a shingle roof on trusses.- Hide quoted text - - Show quoted text - Oh, and the beam is not designed like that for what it "carries", but for uplift from wind. And yes, for residential there are standard designs, but not for industrial/commercial applications. They are certainly looking at down force here since the #7s are on the bottom and center with the #5 on top. Well, of course in it's neutral state (no wind) there is downforce and you therefore must have more reinforcing in the bottom because that will be the tension face and the top would be the compression face. Concrete doesn't perform well in tension, but in compression the reinforcement is more for containment than anything. What did they make you use for stirrups, #4's at 10" or so? |
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