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Distinguished Contributor
drafter1411
Posts: 389
Registered: ‎10-13-2008
Message 1 of 5 (573 Views)
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roof pitch

573 Views, 4 Replies
10-06-2011 07:40 AM

Hello everyone, I'm still learning revit and need help understanding some things. In a book I'm reading one of my self quiz questions is as follows:

 

Determine the roof pitch, then it has the typical triangle with 1/2 pitch and 1/4, 1/3, 1/6 and so on. I know rise over run like 5/12, but don't understand the fractions. How do I get 4/12 or 5/12 and so on from the fractions?

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alan.quinn
Posts: 580
Registered: ‎09-08-2010
Message 2 of 5 (548 Views)

Re: roof pitch

10-07-2011 09:05 AM in reply to: drafter1411

Fractions are not a typical way to calling out a roof pitch. So my guess is that a 6 in 12 roof or more commonly called a 6 pitch would be 1/2 and a 3 pitch would be 1/4. Where 12/6 = 2 for the first and 12/4 = 3 for the second. Anyone who pounds nails for a living have any other ideas?

 

Thanks for posting.



Alan Quinn
Support Specialist
Product Support
Autodesk, Inc.
Distinguished Contributor
drafter1411
Posts: 389
Registered: ‎10-13-2008
Message 3 of 5 (543 Views)

Re: roof pitch

10-07-2011 10:20 AM in reply to: drafter1411

the way the book has it is a 12/12 = 1/2

 

a 4/12 = 1/6

Contributor
jim5552
Posts: 16
Registered: ‎07-28-2011
Message 4 of 5 (540 Views)

Re: roof pitch

10-07-2011 10:59 AM in reply to: alan.quinn

This brings back memories of my registration exam ...

From my college construction book... See attached.

Distinguished Contributor
drafter1411
Posts: 389
Registered: ‎10-13-2008
Message 5 of 5 (534 Views)

Re: roof pitch

10-07-2011 11:15 AM in reply to: drafter1411

perfect thanks

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