So here is where I'll try to compile some of the equations I've used in the past. I look forward to seeing what y'all do out there.
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That's a nice book to get someone started with the stacking& speed square terms. I'm sure I have looked it over but I have never used it. I have used both rafter books, also CM 111 to the CM pro. That software stuff is beyond me tho.You never used the little blue roof framing book? Swanson speed squares use to come with a mini version.
No.You never used the little blue roof framing book? Swanson speed squares use to come with a mini version.
5x5=25A good framing sq. has rafter tables on them, really all you need. If they get worn off you can get your lengths by measuring with a tape. Example, 5/12 common rafter, measure across from the 5 to the 12 and it will be 13 1/8" then multiply as needed for the run.
I had to do it the old school way cause we didn't have those calculators then. I can certainly see the advantages of having them & how to use them.
I pulled that number out of my arse simply as an example, never checked it with a book or framing sq. I knew it was close tho since I framed my house roof on a 5/12 about 5 years ago, my last roof, ha.5x5=25
sum of these is 169
sq root of 169 is 13 not 13 1/8 :whistling