So, if I'm in a roof and want to figure out the rise where do I put my tape measure? The X Y line? or the underside of the ceiling joist? Then where do I measure vertically up to? The Apex?
Do you have video that shows height above plate calculations showing calculations for roof tile etc when determining overall height for rafter lengths?
Hey mate. I love the video, easy to understand, Thanks! What program did you use to draw those diagrams? I would like to drawer out some stuff like this.
This is just a power point that I have used so I could flick through while recording. On other videos I have used Sketchup free. That might be better for computer modelling.
Normally a set of house plans will give you the pitch. If you are trying to match something existing and you don’t know the pitch then you can get a height measurement and work out the pitch from that. Watch the video from the 10 minute mark for the formula.
I use a calculator most of the time. Yes from bird's mouth to ridge is 5.773 m. ( Less half the ridge) Rise = 2.885 2.885 / 5 = 0.577 INV ARC (tangent) 0.577= 30° Love mathematics!
If you are trying to match an existing structure then hold a level against the roof at one end, then measure how high the level is at the other. Then you can calculate the angle.
What calculator are you using because my Samsung calculator gives me 166.6666666667 when I divide 5000mm by 30 degrees? Am not good in mathematics and I find calculating the pitch of a roof as one hell of mathematical conundrum that has outstretched my foraging mechanisms.
Samsungs work differently to other calculators. You may have to put brackets in the right places to get it working. You can also use a triangle solving app. Trigsolver or something similar are very easy to use.
Simple but difficult for some of us . I want you to help us without using calculator, how to find the height of a roof when the pitch angle is only given
After spending a solid work day messing around getting this wrong using all the right math, and then hours on RUclips looking for someone with the answers I was looking for, finally here I am watching your video. Honestly, I'm glad I had this so twisted because now I will never forget what right looks like. I'm looking forward to going to work tomorrow and looking like a dang super star. Thanks!!!
Hello mate I’m building a little porch tomorrow and need to work out my top ledger to attach my rafters to my wall plate how do I work out how high the rise is for me to put the ledger at with it being 40°
4ft is your "run". The difference in height is 1ft, this is your "rise". watch this video from the 8 minute mark. Hope this helps. ruclips.net/video/z3zWsAzvNng/видео.html
![How To Make Common Rafters [Measure, Mark & Cut]](http://i.ytimg.com/vi/kVM7gPJN3UU/mqdefault.jpg)
100 percent the most understandable explanation. THANK YOU!!!
So, if I'm in a roof and want to figure out the rise where do I put my tape measure? The X Y line? or the underside of the ceiling joist? Then where do I measure vertically up to? The Apex?
Thanks for the video really helped
Perfekt and very good 👍🏻👍🏻👍🏻👍🏻👍🏻👍🏻👍🏻👍🏻
Do you have video that shows height above plate calculations showing calculations for roof tile etc when determining overall height for rafter lengths?
great stuff. thank you
Hey mate. I love the video, easy to understand, Thanks!
What program did you use to draw those diagrams? I would like to drawer out some stuff like this.
This is just a power point that I have used so I could flick through while recording. On other videos I have used Sketchup free. That might be better for computer modelling.
What about the bird mouth doesn’t that change the size by 20mill
Perfect! Just what I needed. Subscribed and thank you!
thank you so much sir, it really helped me a lot.
What is a common birds mouth size? Taking the birds mouth to maximum depth which would be a third of your timber ? Does that change the pitch?
No it doesn’t change the pitch. You only need a bird’s mouth cut big enough so that the rafter sits on the top plate properly.
Excellent explanation, good.
easy to understand, god bless
Halo do u have any drawing foe this.
30º degrees is a standard angle or why did you use this angle?
I selected this angle at random. There is no special reason for it.
What if there is no given degrees at the moment? how to get the degrees. I have only the RUN and the SPAN?
Normally a set of house plans will give you the pitch. If you are trying to match something existing and you don’t know the pitch then you can get a height measurement and work out the pitch from that. Watch the video from the 10 minute mark for the formula.
I use a calculator most of the time.
Yes from bird's mouth to ridge is
5.773 m. ( Less half the ridge)
Rise = 2.885
2.885 / 5 = 0.577
INV ARC (tangent) 0.577= 30°
Love mathematics!
Thanks Matt , love how you explain the formula 👍
Thank you! You did explained very well! 😁
STANDARD MEASUREMENT, PLEASE.
Extremely helpful and well thought out.
Great video, is the a formula to work out the angle using rise and run which includes the size of timber being used, example a 6x2
No. The calculations are just geometric lengths. The size of the timber is then marked from the backing line.
@@mattthechippietrainer thanks for the reply
Thank you.
Well done!
Hey Matt, how do you work out the overhang geometric length? What is the formula?
Cheers.
Same formula, watch from the 6 minute mark. just use the overhang from the plan for the run.
Thanks for good video.
Thank you👍🏻
Thanks Matt. I'm designing a roof but only have the run and not sure the angle or the rise. İs there a metric formula to determine those factors?
If you are trying to match an existing structure then hold a level against the roof at one end, then measure how high the level is at the other. Then you can calculate the angle.
managed to work out my rafter size using your formulas many thanks steve.
Good video Matt ... be better if you showed the calculation to find an angle/degree° using tan on a random set rise and run, just saying!
This is covered in the video from about the 10 minute mark.
@@mattthechippietrainer ahhh i didn't get that far in the vid....doooooh!
my question is about metric speed square? in imperial pitch is rise per 12 inch run. whats how is it in metric?
Are you based in aus?
Yes I am. 😊
I was looking for the same thing😊 Btw thanks
so on a speed square if we have 30 degrees i can use 6 pitch for common rafters?
Hey I am planing to starting my business of roofing can you how to messure roof for charge
perfect
What software are you using
It's just a power point that i recorded on screen.
Hey Matt thank you so much for this.
What calculator are you using because my Samsung calculator gives me 166.6666666667 when I divide 5000mm by 30 degrees? Am not good in mathematics and I find calculating the pitch of a roof as one hell of mathematical conundrum that has outstretched my foraging mechanisms.
Samsungs work differently to other calculators. You may have to put brackets in the right places to get it working. You can also use a triangle solving app. Trigsolver or something similar are very easy to use.
Simple but difficult for some of us .
I want you to help us without using calculator, how to find the height of a roof when the pitch angle is only given
Have look at this series which shows how to cut a roof without the calculator. ruclips.net/p/PLnaiMNCN8n7PZPn6TBpyiyWBspkR2HBf6
After spending a solid work day messing around getting this wrong using all the right math, and then hours on RUclips looking for someone with the answers I was looking for, finally here I am watching your video.
Honestly, I'm glad I had this so twisted because now I will never forget what right looks like. I'm looking forward to going to work tomorrow and looking like a dang super star.
Thanks!!!
I’m glad you found it helpful. Thanks for the comment.
Hi Matt, If my span is 5200mm and my geometric length is 7100mm what is my angle and what is my rise please?
I d help but what do you mean by the 7.1 m
3:55 someone explain??
Hello mate I’m building a little porch tomorrow and need to work out my top ledger to attach my rafters to my wall plate how do I work out how high the rise is for me to put the ledger at with it being 40°
Who type of calculate are you using iwant to download it
I didn’t download it. It was just the one that was already on the computer when I got it.
@@mattthechippietrainer my calculator is working like yours but like your formula
How do i calculate......wall A 7 ft and wall B 6 ft......distance between wall is 4 ft,....now what is slope distance of the walls from 7ft to 6 ft?
4ft is your "run". The difference in height is 1ft, this is your "rise". watch this video from the 8 minute mark. Hope this helps.
ruclips.net/video/z3zWsAzvNng/видео.html
LEGEND 🫡