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Rafter cable ties
I can't understand this math. I've been over and over it. Each time I get a little further, then I loose it again.
ref: How to calculate rafter thrust? -Help! At http://www.eng-tips.com/viewthread.cfm?qid=105386 Can someone help me figure cable load? 4/12 24" rafter spacing. No rafter ties at all. A few existing collar ties. ceiling joists run parallel to ridge. house is 27' x 30'(ridge). 7/8" roof planking and asphalt shingles. thanks, pa |
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