Hi all, I’m installing rake windows and i was wondering if anyone can help me figure the necessary spread between them, to keep the pitch consistent, on my calculator. My small window is 91 1/4 rise (long point) with a run of 23″. The next window has a rise of 93″. The pitch is 4/12. I usually use a straight edge but figured it’s time to join the electronic age.
Thanks
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Hi all, I'm installing rake windows and i was wondering if anyone can help me figure the necessary spread between them, to keep the pitch consistent, on my calculator. My small window is 91 1/4 rise (long point) with a run of 23". The next window has a rise of 93". The pitch is 4/12. I usually use a straight edge but figured it's time to join the electronic age.
The 91-1/4" rise and 23" run has a short point leg of 83-9/16" and the top diagonal is 24-1/4"
93" rise and 23" run has a short point leg of 85-5/16" and the same top diagonal of 24-1/4'.
Difference between your two verticals is 1-3/4" ... That's your rise for this calculation.
Since the run of a 4/12 pitch is 3 times the the rise, your spacing between the windows will be 1-3/4" x 3 = 5-1/4"
See, you didn't need technology for that afterall. 4/12 is fun to work with.
Thanks, that's perfect. Now i'm curious though, how could I do it on my calc for a 7/12 for example?
Edited 12/5/2008 11:23 pm ET by snowderel
I really just wanted to jump in real fast before Joe realized he misread your question so I could say
"I beat Joe, I beat Joe, I beat Joe!!!"
Seriously though, hang on a bit and Joe will be back. He's the man when it comes to efficient math. I'd just confuse you with my crazy ideas.
But here's a short answer in the meanwhile. I used a factor of 3 above because 12/4 = 3. So in the case of a 7/12, you'd use a factor of 12/7=1.714286 instead of 3 ... but that'd look awfully strange with windows designed for 4/12!
Edited 12/5/2008 11:33 pm ET by Righty_Tighty
I really just wanted to jump in real fast before Joe realized he misread your question so I could say
"I beat Joe, I beat Joe, I beat Joe!!!"
I really did blow that one. I am a pineapple.
Joe Carola