Posted by Northvale - PA on February 13, 2015 at 16:54:47 from (24.112.148.224):
In Reply to: roofs are collapsing posted by Geo-TH,In on February 13, 2015 at 04:49:54:
ok, well, here in SE PA, when we had 2 blizzards in a row, a hay customer of mine showed me his bad truss problem (their house is actually built in 1 end of the pole barn). The bottom cords were spreading apart at the splice plates. That's right, the splice plate barbs were slowly pulling out because the bottom cord was in extreme full tension. So, the weight on the roof deflects the top joist rafters, stretching the bottom cord, while the walls bend outwards. It only takes about 1" of splice plate movement to cause a collapse. So, go check your bottom cord splice plates and reinforce them !!!!! He did. Problem solved.
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