Roof Pitch and How-to Manipulate rise over run
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- Опубликовано: 29 сен 2024
- A description of what pitch is and how to manipulate the numbers when framing and planning a project. Carpentry is mostly breaking down the elements of a building into simple shapes, making it easier to understand.
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I'm Kody Horvey, owner of Up To Kode; a full service carpentry, contracting and consulting company that proudly serves Red Deer and all of Central Alberta.
We are committed to being Central Alberta’s most sustainable and energy efficient builder with a strong focus on quality and innovation.
Our vision is to continually implement and increase the use of high efficient building practices and products to create sustainable, multi generation structures.
Here on RUclips, we hope to share our work, get you inspired, and give you the knowledge to plan and execute your own projects.
Questions? Just ask! Email kody@uptokode.com
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I knew this had to be an old video when I saw that flip phone! 😂 Great explanation!
Such a great piece of technology!! Haha. These videos are now becoming retro !
@@uptokode I know, right! But that's why we RUclipsrs love making videos: they stay relevant for years! (Your video helped me study for a carpentry test that I have this evening). 😀
What is your channel? I also have carpenter math videos which are helpful and more specific. I have one about additions where I match the fascia heights with the new roof having different pitch and heal height.
Great channel you have! We’ve been at it roughly the same amount of time.
Thrift Diving hey
How is the slope factor used in cutting hip and valley jacks?
I’ll do my best to explain it. A hip or valley rafter sits at 45 degrees to a regular rafter (when looking at it from above and NOT factoring the slope. Keep it 2D in your mind). Therefore the RUN of a hip is 1.414 times longer than that of a regular rafter. If your roof is a 5/12 pitch then for your plumb and level cuts on a hip or valley rafter you would set your square to a 5/17 (run of 12 X 1.414).
The rafters that hang OFF the hip or valley would still be cut at a 5/12 pitch for the plumb cut but then you have to bevel it at a 45 to butt into the hip rafter.
Does that help at all? If not email me. kody@uptokode.com
Great great info Thanks for sharing.
You should have plugged in 24 inches instead of 2 feet. You have to use the same units of measure. Your answer of 1 was 1 inch not 1 foot. Try plugging in 4 feet and 48 inches and you will you get two different answers.
Yes very true and good point.
Yeah man u fucked the whole thing up. Doesnt make any sense when your doing feet and inches in the same equation wtf.
Did this joker just do a complicated equation, but whip out a flip phone from 1997 just to use the calculator? He is some kind of smart. :)
Haha. This is an old video ...good catch. However math never goes out of style.
That’s a danged good drawing of a roof there bud.
Why can't all roofs be a universal pitch.
Great video man, very helpful
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Great explanation, however, what if your trying to figure out rise over pitch, when changing over from a Slant roof to a pitch roof, and the walls are shorter in the front and taller in the back?...;-)
Not sure how I can help with your question. Pitch or slope is always a ratio to rise over run. If you have a wall that’s say 50 feet long and it rises say 5 ft then that ratio is 5:50 (rise over run). If you want to know the pitch then go 5:50 = x:12.
Cross multiply and divide. So 5 x 12 = 60. Then that answer 60 divided by 50 = 1.2.
Your pitch is 1.2 over 12. Not sure if that’s what you were asking.
You can also find difference in length by placing your framing square on a board - 6 on the tongue and 12 on the blade. Then mark the edge of the blade, and then slide it along the mark until it reads 16 (for 16" OC). Now look at what the tongue side reads. That is the common length difference of gable or rake studs for a 6/12 pitch. This works for all pitches, just set your square for whatever pitch you have.
6 divided by 12 is 0.5
INV ARC (tangent) 0.5= 26.525°
A roofing square would be your answer not this twaddle
I love math when I use on the job that I love.
I hate math when teachers teach me in the school only because they are paid for it an it make no sense in my life.
Thank you, Pro. Professional / Professor(teacher in Brazilian Portuguese).
26.5°
👍
I’m not making the studs like that. They will all be the same size. Instead it will be a king truss with supporting wood. But I understand
Thank you that explained it way better then others have tried
good
I started with Woodprix plans.
slope is not the same thing as pitch, fyi.
Good infor....thank you
I liked math at school but they didn't teach me these methods..therefore I didn't understand a thing ..
That’s too bad. I guess we all learn by different methods.
Wait, are you doing inches or feet?
Because 16" is very different from 24".
Rise over run is just a ratio. You can plug 16” or 24” into the equation and as long as you cross multiple and divide you will get the other half of the equation you need that is relative to the number you used. It can be in inches, mm, feet, etc .
Is this guy from Canada?
Jesse James your mom is.
Thank you for the video. it helped clarified some questions I had. Because I have a test on it soon. Just doing some last minute studying while watching a Bigorexia documentary.
Glad it helped! I have some other carpenter math videos that are way more detailed.
Oh, I guess it wouldn't hurt to check it out. Although I already did the test. It wasn't as bad as I thought. Only 4 questions. Also it was more like a refresher. Although I understood it well. Once I got back in the mode I'd gone over the notes I wrote in class. Pretty cool though, the math. Although I don't know what the results for the test are since it's still being marked.
Hopefully it's good. :D
Any ideas for A frame cottage?
Lots of ideas. I just need you to ask a more specific question
what is a 5/19 pitch roof
lol a flip phone... i havent seen them in a while
That’s awesome! I need to watch this again just to go back in time.
Good video, thanks
Bad teacher
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WHAT IS THE "PITCH" OF A ROOF?
It's the angle of roof itself expressed in a ratio of rise over run. A 3/12 pitch is a low angle and a 12/12 pitch is steep (45 degree angle)
I’m wondering does one side of the roof have to be half the size of your platform??? I’m planning on building a big playhouse the platform is 17’3” by 14’6”, anybody who knows the answer please reply and let me know. Thanks
No. Make 2 half roofs and lay them on the platform. It will lay as flat as the platform. Thats a flat roof.