How To Frame A Hip Roof Part 2 - Answering 2 Important Questions
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- Опубліковано 12 чер 2024
- In last weeks video we learned how to frame a hip roof. Today we are exploring in more detail two of the measurements behind the calculations we used to frame a hip roof.
How to frame a hip roof part 1 - • How To Frame A Hip Roo...
0:00 Intro
0:28 First Question - Why do we use a 17" run for hip rafters?
2:16 Second Question - Why do we add 7/16" to jack rafters?
6:04 Outro
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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.
If you missed part 1 here is the link. ua-cam.com/video/c2KrU2b1EJI/v-deo.html
Thank you for the helpful videos, I understood 99.9% just had a question on one thing. I know with common rafter you deducted 1/2 the width of the ridge board. What about the king common rafter? Since it is butting up to the face of the ridge do you not remove 3/4” like the common rafters?
Check out 3:45 in the video, the ridge and last common rafters are set at the run 23 1/4". Let me know if that helps. @@peaceonearth405
@@TrainingHandsAcademy thank you so much I get it now.
Great! @@peaceonearth405
What an amazing teacher you are. I'm a retired engineer, so I understand all the math, but the way in which you explain it, makes it so much easier to understand. Great job and keep up the good work!
Wow, thank you Charlie!
That was awesome. Thank you I am building my own house and your videos for the hip roof explanation is right on. Thank you and God bless you for your teachings . I wish you and your loved ones the best life has to offer us .
Great teaching and explaining in a way most people can understand! God bless.
I wish I would have became a carpenter when I was younger. I love updated or making things better on my house.
Perfect explanation bro I tried adding the seve n sixteenth on my jack rafters and it came out perfect thanks man
So glad to hear that! Thanks for the comment bro!
Great video your showing, keep them coming, you make them easy to understand cheers
Thanks 👍
Fantastic teachings. Really appreciate it.
Thanks for the comment. :)
This was another great vid!
Helpful ,Thank you!
Bonjour, I am from Montreal, Canada. I am undergoing training as a carpenter, and we have reached the point of constructing a roof exactly like the one you are showing us. Your explanations are very clear and have been very helpful. I have subscribed to your channel and will follow you in the future.
Thanks for the follow Mike! I'm so glad you are in school for this. If you need anything please reach back out.
Super helpful! Thank you much.
You're welcome!
WOW; I couldn’t thank you enough ; it will not be more easier than this
Great video after video. Complicated things but well explained.
Very hard to explain... I hope you picked something up ;)
Good info. Nice job!
Thankyou such a good channel
Really appreciate your videos
Glad you like them!
amazing teacher thank you
Thank you! 😃
Awesome!
thank you very much for the videos. They are very well explained. The only thing I've wondered about is how all the rafters are fastened at the point where the ridge board, king rafter, common rafter and hip rafter all meet.
They would be all attached with framing nails... normally from a framing gun.
I know enough now to build a house! Just kidding. I wished I had this knowledge years ago so I could build my dream house. My grandkids will make the most from it.
Thank you for making and sharing this video!
Am interested to learn more please am from Papua New Guinea it's great learning from you
great channel 👍👍👍
Great help all those videos 👍
Glad you like them!
Greatly informative video! Can you do a hip roof that requires a structural ridge? I'm curious how you calculate the details for the loads to that will be carried.
I dmire your short but practically detailed lectures to handy diy in remote 3řdWorld
Chido compadre
Another way to get to get the jack rafter measurements, especially on a small roof, is to actually just measure 16"(or 19.5 or 24 or whatever) square over from common rafter to the where the hip rafter intersects ti mark where the jack rafters long point will sit. Then measure from there to where it will sit at the outer edge of the top plate.
thankyou
Ohhhh ! Got it
If you marked the 45 degree line on top edge of the comman rafter then at the midway point squared a line across the top edge of said rafter and measured from that line up to the long point would that work out at seven sixteenths or am I barking up the wrong tree. great videos btw thank you
If you have your hip rafter cut at a single bevel 45 (porch roof coming off the wall) it will lay flat on the ledger. Do you have to take into consideration the 7/16’s with a single bevel and not double?
Excelente vídeo me ajudou muito a compreender alguns mistérios em telhados, sou do Interior de são Paulo aqui no Brasil, profissionalmente sou bombeiro municipal, mas nas horas de folga tenho meus hobbies, um deles é construir telhado, aqui no Brasil usamos os ângulos para fazer cálculos, eu gostei muito desse método de proporção para saber a inclinação, muito obrigado por compartilhar conosco seus conhecimentos e no meu caso agradeço também por disponibilizar a legenda em português, Deus abençoe muito você, seu trabalho, sua família. Forte abraço aqui do Brasil para todos os inscritos desse canal!
Muito obrigado pelo comentário e pela bênção! Estou tão feliz que este vídeo tenha ajudado você, e eu oro uma bênção sobre você e sua família. O Senhor é bom. A paz esteja convosco!
I have a question that I don’t think you covered. I am cutting hip rafters for my outside cooking are roof. The building is going to have a small box and 2’x2’ small dog house type coming out of the top of my hip roof ( to let smoke out) my rafters come to the point of my box and i am struggling to get the angle and length right on my corner rafters. Thanks in advance
I know this is an old video now but what if I have a double hip such as double LVL hips measuring 3-1/2" total, do I need to subtract anything or am i still going to half with the angle measuring to add to my construction calculator?
You are a great teacher. I have learned a lot from your videos.
Question, does the 7/16” works with 4x hip material or is does it only apply for 2x material?
Yes, only 2x material. My working knowledge is weak when it comes to all those specifics of different material thicknesses
Can you just add 3/4" to the run and get the theoretical long of the jack as if the hip ran long through the ridge? I think you could just subject the difference in Jack's from this number to get the first long, but im not sure.
What happens if say your stock material is 5 1/2”thick and not 1 1/2” thick, wood the 7/16” be a different size ???? Would there be a rule of thumb for different size material?
Thanks 🙏
Don’t you have to deduct half the diagonal width of the hip from the jack just like you have to deduct half the ridge from the common rafter?
Great video, thanks for sharing. Please note you have to add the 7/16 back on because you deducted half the ridge from your common rafter at the start of the process
Thank you for sharing.
16.97 = 12 x √2
The runs of the common, king and hip rafters 45-45-90 triangle, therefore hip run = common/king run multiplied by √2 (or ~1.41). From that you can calculate the hip run for any roof pitch.
Rather than 7/16 (for 16-in on center framing), do you know how much you would add to the jack rafters if you're framing 24 inches on center and you want them to land on center?
If you are using the calculator in this video it would be the same for 24" OC layout... add 7/16"
How do you get the 17” number in the calculator what’s the formula?
🎉
So, what happens when you have a different size common rafter on either side of your hip rafter?? I'm redoing a really old porch roof. Built in the late 1800's. The original hip rafter is 2 1/2" wide. I have to replace it. The roof is 40' by 8' with the end common rafter having about 4' run with the front rafter having a run of close to 8'. I'm gonna replace the hip rafter with 2- 2x10's which is 1/2" wider than the original. Hmmm.... A 2 piece hip rafter replacing a 1 piece hip rafter.....
Clear as day when you know how to use the calculator you save lots of time and can cut everything at once on the ground safely
After watching this my new shed is getting a hip roof.
Nice!!
muchas Gracias por sus videos Boy A ser un seguidor muy constante porque si quiero un poco de sabiduría que Dios le da a ud para compartir de su don que le a regalado y si estoy aprendiendo mucho con sus videos Dios le siga bendiciendo mucho para enseñar a otros puedo escuchar Inglés pero no puedo escribirlo y pido disculpas Gracias
¡Eres muy amable! Gracias por las bendiciones y por su audiencia. ¡Que dios te bendiga!
How would you calculate common and hip rafters if you have double ridge beam. Your video show single ridge but what if you have double.
Basically, your run simply shortens which changes the numbers you put into the calculator.
Hip hip----hurrah!"
LOL
What if you rafters are 24" oc and not 16" oc when using the calculator . When determining jack rafter lengths
you can adjust that within the calculator
Does the 17” still apply if my pitch is 8 12?
Yes, all valley and hip rafters have a 17" unit run
You lost me with imperial measurements , but I understand the way to calculate . In France we just use metric , nobody is perfect 😁
Haha! In most of my recent videos I always try to do the conversions but these last two videos had too many change over. :)
How do I mark the jacks location on the hip or valley ?
Hip length divided by run x the on center spacing. But you the to take into count the centerline and width of hip. You can also step it off, but it is a different rise and run. If your interested let me know.
So instead of a double bevel hip cut n you use a single bevel hip cut, would the layout be the same
So that 7/16 changes in each roof pitch..like 8/12 9/12 5/12 would be different.?
No it's the same no matter the pitch.
@@TrainingHandsAcademy ok..thnks another question i have a roof book and the talk about shortened the jack rafters and hips..on a Valley roof and hip roof...what is that.?
@@joelethalcruz4417 This is similar to the 7/16" adjustments we have to do on the Jacks. There are many different ways to calculate a roof, and shortening has to happen with a few of those ways in order to make everything "plane" out so that the plywood lays flat. You have to remember that most measurements/calculations are taken from the centerline of the framing material, but we of course can't frame that way, so we have to shorten/lengthen framing members in order to assemble a roof, again so everything is flat for the plywood to lay on. It's a very deep topic but I hope this helps some.
Mathematically 17 is used because the root of 2 times 12 is 16.97 ~ 17
What about rafter ties?
If codes require them, yes.
Shouldn't the 7/16" be added to the jack's run, not the jack's length? If you draw the projection of the runs on the ground and you draw the connection between the jack rafter and the hip, we can clearly see that the run has to be elongated by 7/16" to reach the long end of the jack.
I send you an email.
Imperial measurements... some people make it themself real difficult
I just layer out the 4 walls for a shed and one of them are a half inch longer than the others so then a calculator won't be 100% accurate. So what to do?
Cut them a little longer and fit them as needed.
🤔🤔🤔
My goodness 😅 how many fractions! Find it much easier with straightforward mm😅 I guess I'm just use to the metric system
I hear you. I always try to make my videos in both systems but this one just had too many numbers to convert. Thanks for watching.
@@TrainingHandsAcademy no that's fine. You guys are use to those measures and we're just use to the IS🤷🏻♀️. The video is great.
Framed hundreds of houses and never needed a calculator, You can step the commons off with the square .Measure the hip rafters and the jack rafters. No mistakes.
Yes, I really like that method as well Jerry. :)
@Jerry Riggan
Cool story, bro.
I will try it
I’ve framed a bunch also. Can step it off, use the blue book or scale it. Great in any situation. I do use the calculator just like the video. You make a great point. You can’t beat a field measurement. Have never framed a house perfectly square with equal measurements everywhere. Framed a small 12x12 structure yesterday and used the calculator for the hip roof. Came out great but even on that had to trim or add here and there. What if batteries go dead ay?
DUDE, YOU SHOULD BE IN A CLASSROOM.🤓
I want to be... waiting for the right opportunity.
A²+B²=C²
First
And your point is ?
Sorry but you still didn't explain how to calculate the 16.97 (17").
To calculate the diagonal of any square, multiply the length of the side (12" here) by the square root of 2 (always approximately 1.41).
So 1.41 * 12 = 16.97
Otherwise, good videos.
Maybe I'm a complete moron (in fact, I'm sure I am), but I don't see how those derivations of the 7/16'' demonstrate that you need to add that distance to the jack rafters' lengths. It just seems sort of coincidental.
It is simply because of the calculator.