How to Layout Rafters // Roof Framing Part 2
HTML-код
- Опубликовано: 30 сен 2024
- Wondering how to layout rafters to right way? Follow this step by step rafter layout guide and our resources in the description below. We DON'T skip the basics. We will walk through how to calculate rafter length, how to use a speed square to accurately layout the peak, birds-mouth & end cuts on a rafter, and how to cut rafters for best results. This video is part 2 of 8 in our roof framing video series that is a complete beginners guide to framing a roof for a house. It is also a part of our Construction Basics Project, a collection of training content for those taking on construction projects for the first time. Check out our channel for a TON of videos covering construction projects from foundation to finish work to get you started on your next project!
Click on the timestamps below to jump to specific roof component descriptions in the video:
0:20 - How to calculate rafter length
5:02 - How to read a speed square
6:17 - How to layout rafter cuts on a board
16:52 - How to cut rafters
FULL ROOF FRAMING PLAYLIST: • How to Frame a Roof (I...
SUBSCRIBE: / nsmconstruc. .
CHECK OUT OUR OTHER CHANNEL!: www.youtube.co....
These great tools will get you started:
Starter Power Tool Kit: amzn.to/2X2aHGY
Chop Saw: amzn.to/3c70QUJ
Tape Measure: amzn.to/2TGa8R3
Hammer: amzn.to/2yz6jWC
Safety Kit: amzn.to/2TGPWyE
Ladder: amzn.to/2zz5qOb
These are affiliate links which help us continue to serve in communities across the U.S.
Next Step Ministries is a 501c3 non-profit organization committed to helping students grow closer to Christ through a life-changing, one-week mission trip. Students have the opportunity to work on challenging construction projects. Our construction department understands that putting volunteers and staff on construction projects without the proper training isn’t helping anyone. These videos are meant to help train those who are interested in learning more about construction or are using construction to serve alongside a community in need.
FOLLOW US:
Instagram: / nextstepbuzz
Facebook: / nextstepmiss. .
Website: nextstepminist...
Video filmed, recorded, and edited in-house at the Next Step office.
#rafters #framing #howtobuild #DIY #construction
![Cody Johnson - I'm Gonna Love You (with Carrie Underwood) [Official Music Video]](http://i.ytimg.com/vi/yy9PuYMU29g/mqdefault.jpg)
For me, the ideas in ruclips.net/user/postUgkxAfqpMLyFn37qcqUl0FAzqkkycQeXqrhP Plans were a starting point for building different sheds . Ryan gives ideas that allow an individual to draw nicest conclusions into the design and building of his or her own shed.
8' 7/8" total span
He fixed it.
Those rafter boards need to be crowned. Look down them and put the curved bow facing up. That way the load of the roof pushes down on them straightening out any bow. Same as with floor joists.
If I'm not mistaken, IRC doesn't allow more than a 1/3 of the board to be cut, making that birdsmouth a little too big. The depth, or the plumb cut of the birdsmouth shouldn't be more than 2 9/16. On a 12/12, that would give you a seat of 2 9/16 which is more than enough bearing. On a 6/12, 2 1/16 is the height of the BM plumb cut giving you a seat of 4". A 5/12, max of 2" and a seat of almost 5". Conversely, an 18/12 gives you a max plumb of 3 3/16 on the BM and a seat of 2 3/16. A 24/12, max depth of plumb at bm of 4 1/8, bearing of 2 1/16. And a 30/12, almost 5" max plumb and a seat of 2". This would all be on a 2x6. Very few inspectors miss that nowadays. If more than a 1/3 of the board height is cut, you'll be ripping out a roof. And the steeper the slope, you end up cutting most of the board off. The 30/12 (I know...extreme but look at the speed square), if you go by bearing, your plumb cuts end up with an overall height of 14 7/8 on a 2x6. If I'm concerned about the 4 1/2 of bearing, the plumb cut on the bm ends up taking out nearly 10 1/4 out leaving 4 5/8 of the board to extend for the tail.
Also, your framing square has a parallel line so your speed square sits flat on the board lining the perpendicular line up better when you sight down the lines.
In the beginning of the raft of video I believe you meant the total run of the building was 8' 7/8 of an inch.. Because 7/16th and 7/16th is 7/8..so that's 8ft 7/8 in..but great video
you are the perfect example of a troll who only watches a few seconds of videos looking for something wrong to point out, watch the next few seconds and he corrects that.
This is probably the best video I have see explaining all the steps! Great work!
i have to question using a 2x8 for this with that pitch, i thought the rule of thumb was the birdsmouth cant cut more than a 3rd of the width of the board
I was about to ask the same question
I was thinking the same
So what should he use ?
@@sef2273 i think it depends on the pitch of the roof and the width of the materials used for the walls(2x4 or 2x6), but if cutting the birdsmouth means you have cut more than a 3rd of the way, look at a wider board and check that. a 2x8 is 7.25 inches wide, so take a 9 inch long piece of scrap and mark it into 3rds, using only one edge of that 9 inch scrap. span from one edge to the other, where does the deepest part of the birdsmouth fall? within the 3rd or past it? if past it, look at a 2x10, if still past that, look at a 2x12
Good educational video. However, I wonder if your birdmouth is too deep into the wood? It seems that the net depth of your rafter at the birdmouth is seriously less than 80% of the actual depth of the rafter, which could compromise the strength of the rafter.
Regarding depth of notch of birds mouth cut, the proper way to lay out a birds mouth seat cut is as shown in the video. Technically, the birds mouth is where the rafter bears on its support, it is not a notch in the rafter therefore it is not subject to notching rules. Note that a full bearing on the support is strongest. In Ontario where I live, the building code only says the rafter must be shaped so it has full bearing on its support“THE ONTARIO BUILDING CODE | SHAPING OF RAFTERS
9.23.13.5. Shaping of Rafters
(1) Rafters shall be shaped at supports to provide even bearing surfaces and supported directly above the exterior walls.”
9:55 My math says that would be more like a quarter inch off partner. Sorry I'm just bored.
Great video, thanks! Wouldn't cutting out the birds mouth affect the angle of the plumb ct at the ridge?
no because you have a cut that just lowers it, which also lets it sit flat on the double plate once that birds mouth is cut
You're absolutely right, it's call HAP height above plate, he will end up with a big gap at the top angle cut, and not a twelve pitch......
construction calculator
UUUMMMMM
If I have a 16' wide building with 1" board and batten siding and I'm doing a 12 12 pitch with 2"×8" rafters and a 2"×12"×16' ridge beam I know the center is 8' but how do you get the measurements for the total length and the birds mouth cuts with a 1' over hang? The bottom and top will be cut at 45° angles but when I try to figure it out I seem to get different sizes.
"bUt wHeN wILL wE UsE mAtH iN reAL LifE." Gonna bookmark this video for the next time I hear that complaint haha!
how do you get 16.97?
I like the roof pitch. My shed will be built with snow in mind. Thanks for your great explanation. Yes I'm a girl.
Great videos but too many UUUUMMM. It becomes a little annoying.
Great job regardless !!!!
Dear NSM Construction - can you please tell this man thank you for all of his / your educational videos?
is total span the width or length?
Yes, total span is the total width of a building. Total run is Half of your spam. EX if you home in 40ft wide(total span), then the total run of the building is 20ft
@@YahQub_ been done 2 years ago
Great video my friend,thank you,
Why did the 2x8 ridge board become a 1 1/2 inch board?
Two questions..#1 How did you decide to do a 12/12 pitch? Is that something homeowners can just randomly pick or do some factors help determine which pitch is best for each situation. #2 We would like to do a more modern roof on our house and we're thinking a sloped/shed/skillion roof--the kind that doesn't have a center ridge it's just a diagonal slope, so in that scenario..would we be building half of what you're doing and instead of the ridge board being in the center, it would be above whichever wall that we want the high point? I know that kind of roof isn't exactly your speciality..just wondering if you have any suggestions on that.
Laurie Clarkson the architect usually decides the pitch. If you're just building a house with no plans it's up to you really
I got lost with the math 😅
I know the video is meant for beginners but it really killed me since I already know basic math 🤣
Great info tho, didn't know shit else presented here except how to do the math.
did you ever do a hip/valley layout like this video?
To confusing just use the step off method
Get urself a miter saw, make ur job easier
Uuuummmm errrr
Tukes Mt correction it’s AHMM
Why criticize?
You don't have anything nice or constructive to say so don't say anything.
How did you figure out that you cut 3/4" to your first plumb line f you are using 2x8 ridge board? Can you teach us how did you get that, what the computation. And what if I used 3x3 for a ridge board?
@@NSMConstruction okay. Sorry for the querries because I'm learning carpentry here in philippines that is why I have mor questions about my confusions. So the real width of the board is 1-1/2" not 2"? How did it became 1-1/2" instead of 2"? It's because you plane the 2" board and that became 1-1/2"?
@@NSMConstruction and hoe about the calculation for the seat cut?
@@NSMConstruction Hello there my friend. Thanks for the link that you gave to me. Now I already fully understand how does the measurement done. Before you gave that link, yesterday I was thinking that if I am right to my conception that the lumber 2" width is planed and smooth that is why it gets 1-12" in the actual. And you gave it right to me the fully understanding of your lumber there compared to our lumber here in Philippines. I am asking these because I am using and following your methods of building and constructing there compared here. Thank you again.
@@NSMConstruction theres a big diffirence even in concrete block piling. In terms of carpentry you there in abroad used a complex understanding, on the other hand like masonry we also have diffirent practice here.. But all in all I am adopting your practice there in order for me to enhance my skills in the world of industrial arts skills. Thanks for the tip.
Aren't you supposed to subtract the width of the ridge beam from the total run before you split the measurement?
My observation and question as well.
I just realized he addresses the ridge beam width further in the video with theoretical lines and actual cut lines. All good! ;>)
Great videos and really helpful so I really appreciate you taking the time to record and upload, however at the risk of sounding petty can you please, please try to cut back on saying 'umm' every other word it's driving me crazy!! :)
Keep up the great vids ........
Aaammm I don’t know
Um, Um, Um, Um, Um, Just use decimals. so daft.
You say the word “UM” way too many times
Umm