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-   -   12/12 pitch rafter (http://www.diychatroom.com/f9/12-12-pitch-rafter-126416/)

 LarryBiggerstaF 12-12-2011 03:13 PM

12/12 pitch rafter

My shed is 20/20, how do I build a 12/12 pitch rafter that will work on my walls?

 titanoman 12-12-2011 04:31 PM

Your shed is 20/20 what? Does that mean it can see good?

 tcleve4911 12-12-2011 04:33 PM

Lay it out on the floor of your shed

 titanoman 12-12-2011 04:34 PM

Quote:
 Originally Posted by tcleve4911 (Post 792268) Lay it out on the floor of your shed
No. Do the math.

 joecaption 12-12-2011 04:39 PM

http://www.howcast.com/videos/179909...-Rafter-Layout

 tcleve4911 12-12-2011 04:39 PM

Quote:
 Originally Posted by titanoman (Post 792269) No. Do the math.
Do both...........

 titanoman 12-12-2011 04:41 PM

Quote:
 Originally Posted by tcleve4911 (Post 792276) Do both...........
No reason to waste time chalking lines on a floor.

 tcleve4911 12-12-2011 04:44 PM

Okay then,
Please do a tutorial about 'how to lay out a common rafter on a 20' wide shed with a 12/12 pitch.

Thank you

 titanoman 12-12-2011 04:46 PM

If you're saying your shed is 20' wide, you rafters are 172.04", minus 1/2 the width of the ridge, from long point to short point, measured across the top of the rafter. The long point being the ridge, the short point squared (45°) across the board to the seat cut on the wall. Got it? (its called the pothagerium theory-a¤+b¤=c¤)

 tcleve4911 12-12-2011 04:50 PM

op's gone................

 tinner666 12-12-2011 04:50 PM

Quote:
 Originally Posted by titanoman (Post 792285) If you're saying your shed is 20' wide, you rafters are 172.04", minus 1/2 the width of the ridge, from long point to short point, measures across the top of the rafter. The long point being the ridge, the short point squared (45°) across the board to the seat cut on the wall. Got it?
Unless you want some overhang. Then, you need to add a bit more depending on how you want the overhang. And to see how each lenght would look, you may then have to lay it out on the floor.

 titanoman 12-12-2011 04:51 PM

Quote:
 Originally Posted by tinner666 (Post 792290) Unless you want some overhang. Then, you need to add a bit more depending on how you want the overhang.
Of course.

 OldNBroken 12-12-2011 06:06 PM

Actually it's pythagorean.
And, no, I have nothing useful to add. I'm just enjoying your exchanges. The spell-check was just an excuse to post...

Carry On :whistling2:

 titanoman 12-12-2011 06:10 PM

Thank-you. I figured I spelled it wrong. Heck I can barely say it. It's some mathematicians name I think.

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