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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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