Thanks a bunch, I have been attempting to arch a 10 foot open with a 12 inch arch for a fence project, this is will definitely solve my problem.
@shaunmitchell5213
8 жыл бұрын
Thank you for posting this video, I have been struggling with this all morning, you explained it in a way that I can fully understand. Thanks again Mitch
@apprenticemath
8 жыл бұрын
+Shaun Mitchell Thanks for watching & commenting.
@simpleman283
3 жыл бұрын
I had the second formula. I'll play around with comparing the two to see witch one I like the most. I never learned metric here in USA but I know my inch fractions, at 15:55 you said good luck with 0.3 of an inch, all you have to do 0.3 X 16 = 4.8 sixteenths. We were supposed to go metric 45 years ago but never made it. Any helpful video gets a 👍 from me.
@whatworkedforme
2 жыл бұрын
great information.. in the end i created a simple spreadsheet (use it on my phone) and all I have to do is put the width or total width of the arch and desired height of the arch.. calculation done for me, instantly, based on your figures. simples. Thanks again
@apprenticemath
2 жыл бұрын
That's a great idea!
@danprice7504
8 жыл бұрын
Thank you! This video has helped me very much. Very simple and straight forward. Awesome!!
@benwilliams1172
Жыл бұрын
god this guy made this complicated. to find centre of any length , measure from one side further than what you think is centre and mark. do the same on other side of opening and mark. measure distance between marks and half it . that's centre now you have the centre open compass to the desired height and draw a half circle. from the side draw a line down at 90 degrees to the base line. open up the compass from one side of the opening to the other . transfer distance to line marked 90 degrees off the base and mark on the line open up compass from mark to opening on the other side and strike a arc to where it meets small half circle . do same on other side and you have a arch.
@udayank.r2504
2 жыл бұрын
Sir I watched lot of video's but this video very useful thank you so much
@dustystahn3855
6 жыл бұрын
Here is a simpler no math way. Think of a Gothic Arch as an A Frame building with curved rafters. Draw a line the length of the rafter on a floor or big enough work table and mark the center. Drive a nail at each end of the line. Place a batten against the nails and from the center push out the batten until you reach the desired curve. draw the curve on the inside of the batten and you have the inside of the arch. It is so simple any one can do it. Securely fasten blocks about two feet apart along the line and you have a building jig. The block spacing varies with the size of the arch. This method works for any arch from windows, doors to buildings. I have even used it to build boats. If you want a different curve, push the batten out at different points. It is fun to see how many shapes you can make.
@bravo3541
Жыл бұрын
Your Formulas are great , but I got confused as to where the new number (R-radius begins and ends) on the drawing; at the span line or the top of the arch depth. Video is a saver.
@thalesnemo2841
6 жыл бұрын
Graphically connect the top of the arch with the shoulder then bisect that line segment . Then draw perpendicular bisector and draw a line towards the central line that is the center of the correct circle.
@apprenticemath
6 жыл бұрын
It works, of course. The difference between doing math vs. geometric construction is that a geometric layout produces work that can be out by 10 mm on this scale. Math is accurate to several decimal places.
@abscomm
6 жыл бұрын
Human errors can be made in the measurements of your mathematical solution, so no option is better than the other as far as accuracy is concerned.
@das250250
6 жыл бұрын
Thales Nemo maths = speed and accuracy , the incredible language of math and geometry axioms
@chadburke852
4 жыл бұрын
The Kaveman Not in the building trades.
@robp1245
4 жыл бұрын
Brilliant! Thanks, just what I was looking for, good explanation.
@sofiamahajan6717
Жыл бұрын
This is really helpfull.... Thankyou for this video
@apprenticemath
Жыл бұрын
Glad it was helpful!
@chiller19100
4 жыл бұрын
Great explanation. Thanks
@padraigharrison6919
Жыл бұрын
Do these formulas work with other arches. Or are they just for segmental arch
@padraigharrison6919
Жыл бұрын
Is 637.5 the location of the striking point for a semicircle arch
@padraigharrison6919
Жыл бұрын
Do the formulas work for all different arch types? what arch is this?
@E-E.ADVENTUREGEARS
Жыл бұрын
IS IT POSSIBLE IF YOU MAKE A PDF VERSION OF ALL THE REQUIRED MATHS FOR APPRENTICES
@muppetbrother
2 жыл бұрын
Clear as mud.
@ryanb1874
3 жыл бұрын
How to do it just using trig, need to know how to calculate where the center would be in any situation
@atubeviewer4942
2 жыл бұрын
Why was the left tape measure, on the corner at the 120 cm? Where did 120 come from?
@apprenticemath
2 жыл бұрын
Just a number that fit the sheet of paper
@UmAr-ft6ze
3 жыл бұрын
Sir by this we found radius now how to find curve length
@piee683
10 жыл бұрын
Thx for this..this solution has been bugging me 4 a while
@selvamlakshmanan8170
7 жыл бұрын
thank you very much
@nramos137
8 жыл бұрын
Nice, does this work in inches as well?
@apprenticemath
8 жыл бұрын
Oh yes, same way
@kotteeswarankotteeswaran5007
3 жыл бұрын
How to find area for semi circular conical arch kindly tell me
@bradwatts8222
3 жыл бұрын
a is half the chord , b is half the chord , c is the rise measured at the centre of the chord ........a x b divided by c = d ......d + c divided by 2 = radius , simple in mm , if your using inches god help you or just buy a metric tape measure 🇦🇺 straya 👍🏻
@apprenticemath
3 жыл бұрын
Works either way, units can be alien feet or Martian's hands, same logic works.
@tomryan9616
8 жыл бұрын
The standard formula for finding the radius of an arch is. 1/2 Span squared ,divided by Rise, plus Rise, divided by 2.
@LiaqatAli-fk4mx
7 жыл бұрын
yours formula is totally wrong dear friend
@giovannitidona658
3 жыл бұрын
In trade school we were taught to first find the center by overlapping 2 circles with protractor where the 2 circles meet draw a line through give you a long straight center line
@user-sj1tt3ie3z
7 жыл бұрын
A squared + (B divided by 2) squared ----- then ----- divided by (A multiplied by 2) = answer. You didn't show to divide B by 2 in your equation at 10:00.
@apprenticemath
7 жыл бұрын
Right, not shown as at 9:13 I say "half the opening", then that number (510) is written down. b = half the opening, ergo the full opening is 1020, shown full scale at 5:28.
@masterwelder65
10 жыл бұрын
Great.
@kimmimaxwell7826
7 жыл бұрын
I have a 13 foot opening with a 38 inch rise .. whats my swing ? thanks
@apprenticemath
7 жыл бұрын
You do the work
@oilcanshawn4918
5 жыл бұрын
99.05 inches if I learned this right
@petercrossley1069
2 жыл бұрын
Just show how to derive the simple formula for the radius. Far quicker.
@rauldeleon6524
3 жыл бұрын
You don't use feet and inches
@brianjames5343
5 жыл бұрын
Why is Jean claude van dan doing a Arch .
@apprenticemath
5 жыл бұрын
Fun, eh?
@artistpw
4 жыл бұрын
For an excel formula it is "=SUM((A1^2 + A2^2)/(A1 * 2))"where a1 is the arch height and a2 is half the opening distance
@davidburns1753
5 жыл бұрын
I cannot find anyone to help me solve what I think must be simple for smarter people that me. I am just barely smart enough to look for answers. Let me try to ask my question without the benefit of pen and paper. Imagine that you know the width (chord) of an arc and you know amount of rise or deflection you want to achieve over that length ... let's say one foot. Is there no way to make a measurement, or many of them over the length of the chord to measured points along that chord thus defining the desired arc? If This makes no sense, forgive me. I can see clearly in my own mind what I am asking, however, that does not mean that others can understand what I want to know. If anyone can help, it will be much appreciated. Likely the answer is simple and I should know it, but guess what ... I don't. One more item ... you may wonder why I do not get a string, a nail and a pencil and do a trial and error method ... that would work, but not with the amount of space available in this and in many circumstances which I come across. HELP!!! PLEASE!!!
@apprenticemath
5 жыл бұрын
Yes, an arc can be defined by different chords starting from the same point. To get to radius, the lengths of chords need to be known and the angles between them,
@harrygirgin9093
5 жыл бұрын
Ohh my God. Seriously I am lost.🙄🙄
@richardbailey2001
5 жыл бұрын
Why didn't you give people the formula for finding the arc .. It's pretty difficult to use these ideas in the real world without math ....
@apprenticemath
5 жыл бұрын
Formulas clearly given at 9:03
@MrTjp420
5 жыл бұрын
where are you from lol 20 inches that is 25.4mm bloody hell my work sent me to trade school and i feel they are gearing me up to build rockets.............
@oilcanshawn4918
5 жыл бұрын
I just wish you used inches
@civilengineeringepu9263
3 жыл бұрын
Good
@philquinn73
6 жыл бұрын
Two thumbs up!!
@isaacrobles1764
4 жыл бұрын
sorry there r 2 diferent easy ways to do it
@جمالالعبد-ف4ج
4 жыл бұрын
جيد
@zully756
3 жыл бұрын
Ellipse
@JulioHernandez-gt5hs
3 жыл бұрын
you talk to much keep it concise
@LiaqatAli-fk4mx
7 жыл бұрын
tooooo bore
@apprenticemath
7 жыл бұрын
I'm not treating your attention deficit disorder or care to hear about it
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