Basic Equations For Roof Framing
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- Опубліковано 11 чер 2024
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In today's video I'm showing you how to use two simple equations for roof framing. I've never shown these equations for roof framing before!
Need specific one-on-one help? Find me on Instagram: / traininghandsacademy
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0:00 Intro
0:20 Two Equations
4:14 Cutting Rafters
5:34 Measuring Line Explained
6:08 Solving For Total Roof Height
7:00 Need Help?
My name is Josh Fedorka, and I’m the founder of Training Hands Academy™. I have been a carpenter and woodworker for over 25 years. I have also held certifications in home energy auditing and have built several LEED certified homes in New England.
God has gifted me with many “hands on” skills and it is my calling and purpose to share those skills by teaching others. Whether it is to seek a career in carpentry, become a general contractor or improve one’s DIY skills and knowledge, the motivation behind THA is to help others successfully learn how to work with their hands.
This is an excellent video. Thank you for showing us how to use the equations instead of just punching numbers into a construction calculator.
Thank you for taking the time to comment.
LOve these videos! Praying for you and your family!
Please pray fro my students and my family.
Will do brother! 🙏
2nd Year Carpenter here. I'm currently in school learning this stuff and I found your videos very helpful!
One thing that I might add to this is that calculating your Slope Gain Factor is a game changer for calculating your rafter length. The equation is (Rise/Run)Squared+1, then square root. This is your slope gain factor. For example a 4/12 has a SGF of 1.054, meaning the cut rafter length is 1.054 times the length of the rafter run. So 24.25 x 1.054 would calculate your rafter length from ridge to birds mouth. You can even add your overhang to the rafter run length to get your total rafter length from ridge to facia. You will need to do deductions afterwards, of course. But its a little less math. You can also find the SGF of your hips the same way but adding 2 instead. (I forget the reason exactly, I was falling asleep at that point in the Theory.) So that would be (4/12)Squared+2, then square root. 1.453 is the SGF of your hip rafter. Hope this helps anyone learning how to calculate rafters!
Bro, thank you for adding this great info!
Hands down best teacher at UA-cam University!!!!
Thanks my friend!
Only just discovered your channel. Awesome stuff and really easy to follow. Just got to get the timber and start my decking and gazebo project. Will be using your videos to help me, thanks 👍
Glad you found me!
Really great videos! Clear, good speed and excellent diagrams!!
Glad you liked it!
So helpful my man, thanks for sharing your knowledge an skill!
I'm glad it was helpful! Thanks for letting me know.
Ditto!
*If you want to support my work, simply drop a comment and do it as much as you can! This helps to wake up the YT algorithms. :)*
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Great go to video 👍🇬🇧
Love your videos, thank you
Thanks for watching Steven!
Best channel, amazing explanation. Thanks a lot.
Glad you think so! Thanks for continuing to watch.
exelent video thanks
Thank you. You got a new fan, I subscribed.
Awesome, thank you!
Made this sooo easy. Thank you
Fantastic!
Good stuff.
Thanks alot man , U are really full of mathematical equations for construction trade applications, thanks for ur amazing knowledge it helps alot ..im learning visually , without acctually cutting in real life , trying to memorize it for the field without having to pull out my phone ..have blessed life
Thank you for the blessing!
Thank you for the information. God bless you
Thank you so much for the blessing... Lord knows I need them. :)
Thank you Josh
You are welcome. Thanks for the comment
Thanks!
Thank you very much!
The channel is excellent, I always follow. The biggest difficulty is due to the measurement system, here in Brazil we use meters and centimeters. This video has measurements in mm which makes it easier to understand.
I really appreciate your viewership Marcio!
The roof master 👍👍⭐⭐⭐⭐
Hi Josh
First off thanks for all your videos it helped me get through an apprenticeship that I took about a year ago. Just wondering you haven't uploaded any new material. One thing I would love would be a build like a shed or just a shed foundation. Anyway I hope to hear from you soon.
Hey buddy! I've been working on my first online woodworking course (handheld routers)... which is now done! Therefore, I can get back to making some more YT content. Most likely a shed build would be an online course... so much to cover. Thanks for the comment! Reach out if you need anything.
Good video!
Thanks buddy!
Love it
Thank you for saying so...
Cough cough, still waiting on how to join perpendicular roofs ( valley). Haha..Your rafter videos are hands down the best on the UA-cams. I have learned so much bc of you, Thank you so much.
LOL, thanks JC!
@@TrainingHandsAcademy new subscriber here. can you please do a vid on how to frame a dutch gable roof with stick framing and no trusses? thank you!
Great videos you have thank you for the education. Can you also do a video to show how to add a crickett on 2 separate structure 5 feet apart. The purpose is to not have rain water in between them.
Great suggestion!
Im building a lean to front porch with a gable in the middle of the porch. I would love to see a video on how to layout the gable on the lean to. Do you have a video of how to lay this out or know of a video on how to do this? thank you for your videos they have been super helpful.
Sorry, I don't have a video on that, nor have I seen one. Thanks for watching.
Im confused about where you got the 7.75 number. Does this number only pertain to a 4/12 pitch. Will it change with a 3/12 pitch?
Your instructions are very clear. Im just confused. I love the videos.
Thank you.
Great videos, thank you.
I'm building a garden shed, using a 13ft 12 by 6 inch ridge beam (locally harvested). Using normal methods of rafter construction, I would be left with a 6 inch wide flat surface on the top of the ridge, which would be difficult to sheath prior to applying roofing material. How do I measure the rafters so that they meet at the center point above the ridge beam. Are there 2 bird mouths, one for the ridge and one for the exterior wall, or only one for the exterior wall?
Yes, two "birds mouths". All you have to do is not account for the ridge thickness in your run number, then locate your ridge height and cut your birds mouth. Hope that makes sense.
Hello, I'm building a shed and find your videos so helpful. Any chance you can help me with a question. The shed is 16 feet x 10 feet and is almost 8 feet high. My ridge needs to be 16 feet long. My question is for that size of shed, what is sufficient for the ridge? 2x6x16 or 2x8x16 enough? Or do I need to go 2x10x16? Also, I'm using 2x4 as rafters. Thank you. Romeo Suarez
Hi Romeo! A 2x6 should work just fine.
@@TrainingHandsAcademy thank you so much!
Idk how I came across your page I still don't know a dang thing of what u just taught me, though I completely understood what you were saying math was my hardest subject probably the reason I'm still broke. But I just wanna say thanks man. Though I will find a way to defeat this battle or the almighty will help me if I try, I've been wondering how to fix my dad's tin shed/shop just don't have the courage to tell him I don't know how. But God bless you sir.
Email me Eddie and I'll help you. josh@traininghandsacademy.com
How to join rafters if my wood is short or it is permitted?
So I'm framing a 16x16 shed with a 4/12 pitch and a 1 foot over hang a 10ft rafter should be plenty long enough. I see you are in Tennesse beautiful country I used to live in Crossville. Be nice hearing from you I haven't lived there in a bout 20 year
Hey there! I've been in Franklin for about 10 years now... things have changed a lot! Let me know if you have any questions once you start building. :)
@@TrainingHandsAcademy right on I definitely will. Maybe when I finish it. I will send you a picture and after I watched your video yesterday I went out back and figured out my rafters and checked them out at day break this morning and they fit like a glove. Thanks. PEACE
Wich is the simple way to find pitch of a roof
Excellent amigo , podrías poner subtítulos en español
Ojalá pudiera, pero UA-cam aún no ofrece eso. Gracias por el comentario.
@@TrainingHandsAcademy you’re welcome buddy , I still watch your videos friend, they are very good! I have a question, for example, a 9 and 12 roof will always go up 15 inches?
Yes, that is correct.
Yo how to do this for a 1/2 inch thick model house it’s weird trying to convert….
Sorry, I don't understand what you are asking.
Now if I could just remember this. Then I can use the information later.
It is called bookmark.....😁
How are you I like you jobs 🤝👍
Thank you 👍
Need better explanation on birds mouth cut
God bless you. Can you pray for me ? I don't feel comfortable at my job anymore, I would like to start something like a business but I always got stock with negative thoughts. I feel blessed but sometimes I feel that I could do better with my abilities. God bless you and your family.
I would be honored to pray for you! May I have your fist name? And if you want to email me, I can follow up with you if you'd like. Josh@traininghandsacademy.com
I watched several of your videos as we were building a large Cedar Timber Frame Shelter over this last month. Thank you for the content as it helped us! Here is our video showing the start to finish of the Build we just completed: ua-cam.com/video/ea80zpqN5PY/v-deo.html
Great job, it looks amazing!
No one is ever clear on how to lay out a seat cut. Yes it’s on a 4/12, but where is the line drawn?
Have you watched all of my rafter videos? You might find what you are looking for there. If not, I can help you. Email me, josh@traininghandsacademy.com
Why don't you use a speed square instead a L square. That is too much lol