r/oddlysatisfying • u/Jaded_Marionberry500 • 2d ago
How to measure wood angles
source: lufihasan95
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u/kroqster 2d ago
oh man when he pushed it in...
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u/Jaded_Marionberry500 2d ago
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u/Reasonable_Dish8989 2d ago
The satisfying part isn't even the cut, it's marking it with total confidence. I measure twice, cut once, and still end up back at the hardware store.
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u/bungbangbingbong 2d ago
He didn't even need to make most of the marks. All he was getting was the radius and centre point. This was mostly done for style which it was successful at
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u/SparklingLimeade 2d ago
The earlier marks are part of getting to those final marks so they're still useful. This also looks easier because it's so symmetrical. And it's nearly the full width so the intermediate steps look less necessary but they were how the tiny little edges were accurate. I want to see this on a smaller, less symmetrically placed, obstruction.
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u/Rock_Strongo 2d ago
The ending was satisfying but the unnecessary buildup was oddly unsatisfying to me. Don't show steps that don't matter.
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u/KingHarambeRIP 2d ago
Not a homeowner or handy in any way. Can a hardware store make the cut in the store once one measures it out or is that not a typical service?
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u/thelittleking 2d ago
Some places offer this. Some places even have employees skilled enough to get it right.
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u/throwaway098764567 2d ago
no because the store saw is always broken, but you don't find out until you've waited 20 minutes for someone to return from the netherrealms to tell you
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u/MoeGunz6 2d ago
I worked at Lowe's for a bit and the cord constantly got cut in half. They would not let us fix it. We'd have to wait a week or so for an electrician to put on a new cord.
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u/snappydamper 2d ago
Is it the pencil or the pulling technique that cuts it off so cleanly?
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u/hardrockfoo 2d ago
the squiggly lines tell the universe this part is no longer needed so it separates the wood molecules for him
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u/billybl4z3 2d ago
what if I don't have 90 degree corner behind
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u/Prestigious-Bat-574 2d ago edited 2d ago
Honest answer: One option is to just cut it roughly to start, then use the washer technique to scribe a line. For a circle (vs. a "straight" line), you'll need to then use a compass to reduce by the width of the washer or use the washer to make a series of marks that represent your cut line.
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u/Tallywort 2d ago
Which will neatly offset any curve to be wrong, unless the surface you're scribing is straight.
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u/Prestigious-Bat-574 2d ago
Which is why I added to my comment before you made your comment that you just have to use the washer to offset the line once you've marked it. I've done this dozens of times and it's easy.
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u/SIowGrowth 2d ago
Should have used this level of precision when you framed the walls
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u/SquarePegRoundWorld2 2d ago
You make your walls square and the sheetrock guy comes in and flares the mud out of every corner making them all out of square.
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u/cantuse 2d ago
This reminds me of a story. I worked in the repair department on a sub tender in the Navy. We would have subs come into port and submit jobs for repair or fabrication work a few days in advance.
There is a stereotype in the surface Navy about submariners, that they are tubers and it takes a special kind of stupid to be a submariner - hence they are called 'tubers'. However, against this are the nuclear engineering types, also called 'nukes'. Nukes are supposed to be smart, but often in an out-of-touch, idealistic sort of way.
So, per the combined stereotypes .... 'Nuke tubers' are a special crossbreed of high-intelligent people, with suspect grasp on reality and the inner workings of less intelligent people.
Anyways, one sub coming into port submits a job -- to install a sheet metal bracket in the canteen*, the bracket designed to hold a television in place. The instructions called out all the specs, including angles and lengths for everything, looking like some kind of trig-meets-geometry homework assignment.
The sheet metal shop, upon receipt of the designs, folds them up neatly and thanks the nuke tubers for their work. They they pull out their tape measures and basically work it all out much more crudely, and efficiently. Everyone in the R1 repair division gets a good laugh out of it the next day.
I'm reminded of this sort of thing when I look at videos like this.... thinking "Great, its rather serendipitous that the pipe aligned neatly in the corner, to allow this pleasingly numberless project to work out... but how practical is this?" The answer is, it isn't practical, at all.
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u/solonit 2d ago
Should still work because what he did was transferring the alignment onto the board, regardless of their angles.
Or am I /r/whoosh
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u/7StarSailor 2d ago
I will start watching these types of video again when they stop randomly tapping shit. YES WE CAN SEE WHY IT DOESN'T FIT!!
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u/Nat1OnStealthChecks 2d ago
My question with these is always the same. How does he solve for this exactly? Like what's going through their head? Is this just a specific trick passed down by craftsmen with unknown origin or is this person thinking in algebra or is it closer to an artist just "knowing" the shapes of anatomy.
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u/eddiewachowski 2d ago
My dad always said a carpenter will know how math works, but not necessarily why.
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u/drwebb 2d ago
My uncle who's a drummer and carpenter is exactly like this.
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u/Epstiendidntkillself 2d ago
How can you tell when the stage is level?
The drummer is drooling out of both sides of his mouth.
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u/OhGodImHerping 2d ago
I’m a drummer. I hate math with a burning passion. I couldn’t begin to explain how music math actually works, just that it does. It’s crazy how much of it is “feel” vs “know”. It just kinda… makes sense.
Carpentry is black magic though.
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u/iamintheforest 2d ago
I do a lot of woodworking. You just learn them - kinda like rubics cube. It seems like you lack some genius to "figure it out", but really 99.9% of the people who can do it have learned a method.
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u/Etherbeard 2d ago
I was a carpenter for many years and in my experience stuff like this was just something that was passed on from on carpenter to the next. Really, everything in the job was like that. Most of the guys definitely weren't thinking about the mathematics of it, but if you knew some real math it could open you up to doing more things like figuring out the radius of an arc of a circle or scribing a perfect eclipse that otherwise takes some guesswork and trial and error. My father was like a savant with complicated roofs. He could visualize how all the different planes would come together, but he wasn't doing any math.
I also don't think most carpenters would do this this way. It's very fussy for not much benefit. He already knows the radius of the pipe and all he's gaining is that little half inch of straight board on each side. You could eyeball that and get it in the ballpark, and if there's a little gap... well, there's a gap anyway because the pipe curves away from the cut. Besides, this room either has raw osb walls, in which case a little gap near the pipe doesn't really detract from the room's aesthetics, or something is going to cover those walls and that will also cover a little gap. But I guess this probably actually just a model set up for teaching or something.
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u/Pretend_Purchase_893 2d ago
This generational passing down of knowledge is exactly why the trades are fucked today. With the huge gap between all the old heads and the new guys much of that institutional knowledge is being lost. And this is not a shot at the system. This way if learning is how you teach the kinds of people that most likely gravitate towards these jobs.
It's honestly an amazing demonstration of alternative teaching methods for those that struggle in a classroom setting. And it's now in serious jeperady because of the huge generation gap in the trades.
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u/Ignitrum 2d ago
I am no handyman but a bit of a math and geometry nerd.
Step 1 (The diagonal lines) and 2 (parallel lines) is to mark the actual radius of the pipe so you get those two "leftover" prongs left and right. Step 1 specifically measures the length and Step 2 the width - but indirectly. It's like measuring angles. You have a straight ground line and a line in any direction from it. Measure one angle and know the other one has to be 180° minus MeasuredAngle.
Step 3 and 4 are to find the center of the circle. Step 3 marks the middle left to right, Step 4 top to bottom.
From there set the compass (? is that actually the word for that drawing instrument or is google pranking me?) From the middle point to one of the 2 proven edges of the Pipes Circle (Where 1 and 2 meet)
et voila.
Le Circle.
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u/PauseConfident997 2d ago
How are you a math and geometry nerd but don’t know what a compass is? What do you call that where your from?
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u/OskarsSurstromming 2d ago
Well if you're not English it's not called a compass... Here in Denmark a compass is the north south scout thingy, the math tool is called a "passer"
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u/Cant-Think-Of 2d ago
In Finland, that compass thing is called "harppi", while the north-south thing is "kompassi".
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u/PauseConfident997 2d ago
I’m a New Zealander, not English, and it’s called a compass where I’m from…so it’s not only English people that call it that
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u/OskarsSurstromming 2d ago
...well your native language is still English
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u/TheGreatGenghisJon 2d ago
Yeah, But Aussie English is its own special English.
Brekkie? That might as well be Greek!
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u/ninetailedoctopus 2d ago
This was actually a highschool geometry lesson in my day - construction using straightedge and compass.
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u/jwezorek 2d ago edited 2d ago
It's just geometry. There are tricks, but good carpenters tend to do stuff like this by intuition.
The real skill here is doing this in place, without literally measuring. What I mean is this guy could have simply measured the diameter of the pipe with calipers and then drawn a circle of that diameter centered on the board with a compass and cut it out. That would have probably ended up fitting less accurately: maybe the pipe is not exactly centered even though it is supposed to be, etc.
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u/Familiar-Cable-2659 2d ago
This is basic geometry
Not something I'd know how to do, but I sure as hell would get see to it if I needed it in my job
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u/RareCommonPepe 2d ago
What is the name of this skill? Does anybody know??
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u/ConstructionOwn1514 2d ago
Oof that tiny gap on the right at the end 😅
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u/JustStraightUpTired 2d ago
You can't fill that gap without two pieces or without installing the pipe though the plank. It's geometry, not magic.
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u/Lifeguard4Life 2d ago
You just know he accidentally cut off the wrong piece before when he started scribbling on the cutoff piece.
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u/Do9an 2d ago
Why are you dragging this out? Measure the radius of the pipe. It's already clear from the wood. You can measure a piece of wood that's about 0.5 cm smaller than the pipe. Just center the wood by about 10 cm and draw a line with a compass. It's simple.
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u/Affectionate-Word779 2d ago
Literally just needed the diameter of the pipe. The rest was theatre.
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u/Headless_Human 2d ago
Yes and no. If it is perfect in the middle the diameter would be enough but when the sides are not equal it might not fit.
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u/DiablosBostonTerrier 2d ago
You still just offset your center of the circle to wherever it lands on the board
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u/Bandin03 2d ago
Only having the diameter doesn't guarantee the side bits will be the correct width and length.
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u/Johan-Predator 2d ago
Okay so what was the point of the first two diagonal lines?
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u/Iconoclasm89 2d ago
I think to create the intersection with the vertical lines on each side to mark the spot where the compass starts
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u/What_a_fat_one 2d ago
There wasn't any. He could have just quickly found the center by 45'ing the peak of the triangle. But that wouldn't make very good clickbait.
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u/Jabrah21 2d ago
For this cut, it's best to use a holesaw. All of the guidelines he drew aren't necessary.
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u/Moist_gooch90 2d ago edited 2d ago
That's a sharp pen you have. Cut through the wood like butter
Edit: spelt sharp wrong.
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u/xiaopewpew 2d ago
Guy is making this so much more complicated than it needs to be.
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u/Mamuschkaa 2d ago
He starts with second 4 and ends with second 40.
This is 36 seconds of work to verify what part has to be cut.
I wouldn't call it complicated.
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u/thedudefromsweden 2d ago
All he really needed was the width of the pipe and the last step in the video.
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u/pushingdaisyadair 2d ago
He is making sure the sides of the board will be flush with the walls behind the pipe
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u/Mamuschkaa 2d ago
The width of the pipe+the position of the pipe.
If you just cut a circle of the width of the pipe anywhere in the log, it wouldn't fit.
Most important the horizontal positioning, but also the vertical positioning (how far away from the edge) is important to get the log exactly to to the corner.
Each line he draws was important to get one of the informations.
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u/crunchsmash 2d ago
This line is made with the assumption the tip of the wood is centered on the pipe, and that the angle of cut already matches the back wall. https://i.imgur.com/DGKpE0M.png
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u/Mamuschkaa 2d ago
The first two lines crossing is always centered in the pipe no matter how the pipe is positioned for the log.
So the line you shows goes to this cross and is in a 45° to the front log edge.
So the assumption are, that all angles are 45°/90°
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u/crunchsmash 2d ago
Yeah that's fine, but he's lining up the ruler with the pre-cut edge of the board, or the pointed tip that is touching the pipe. Which from measurements shown in the video, aren't guaranteed to be accurate.
You can even see how his circle isn't in the right place after he draws it with the compass. It's too far to the left, and he fudges it with the cut.
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u/oscailte 2d ago
No, that would be true if the pipe was wider than the board, you just need to know the diameter. In this case where the pipe is narrower, the position matters as it determines how long the leftover bits on the sides are.
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u/cinedavid 2d ago
There is none. This is all made up for internet points.
So many things are wrong with this. There’s no room for expansion between the floor boards. There’s no tongue and groove locking, no glue to hold it down. No underlayment that I can tell. The boards just happens to stack up perfectly for the corner one to land exactly in the corner.
To name a few…
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u/Glarnorx 2d ago
The application of this specific technique is to get views on social media. There are dozens of ways to calculate this cut, but it rarely if ever comes up in the wild, hence the artificially constructed scenario made for engagement.
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u/MainCutie18 2d ago
I like that these kinds of videos have become popular, I really enjoy watching them
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u/biplobft007 2d ago
I'm surprised by the cut. Those two sides are like 1mm thick after the cut and it didn't break while cutting that thin!
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u/saintdudegaming 2d ago
I watched this. Followed each step. Makes perfect sense. I can promise you I'd fuck this up if I tried it.
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u/clock085 2d ago
waiting for the wood to expand in the middle of summer and expand 1/2 an inch into the pipe to break it
its nice for 1 season a year
thats why u caulk these corners and cover- and not cut the exact shape
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u/ivanavich 2d ago
It's missing the rest of the video. The board slides in and out of position, with the money shot at the end showing a thick, white silicone running off the end of the board.
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u/clock085 2d ago
- NYS building code requires that for each 10 feet of room space - that a hardwood floor be offset from the walls/studs minimum of 1/4”. thats because during the changes of the seasons - materials shrink and expand. its mostly wood. walls shrink and expand, ans so do the floors. so if u have a 10x10 room, ur floor should be 9ft 11.5 inches by 9 ft 11.5 inches.
what im pointing out is that while this looks cool - they’ll be coming back to un fuck it up since theyre tight to the osb on the wall and its a pvc pipe which will crack under pressure.
geez i really went on a rant there
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u/readit347 2d ago
His skill lies in the accuracy of that Arc..
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u/this_is_my_new_acct 2d ago
Uh, by using a compass? You can literally buy one at every Walmart on the continent for like $2-3.
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u/MilosEggs 2d ago
Go ahead, show me another 100 times, I still won’t be able to do it.
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u/No_Pipe9068 2d ago
Yeah, I'd still tape those tiny pieces before even considering cutting it. They leave out that important detail
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u/voodoovan 2d ago
He didn't need to do all that geometry to get a perfect fit. Hey, it looks impressive, and that's the whole point.
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u/Mysterious_Law_7269 1d ago
I love woodworking. I cant do it, my spine is effed, but i live watching it. The precision, old school skills, geometry, watching something being created, the smell. Its just awesome.
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u/Ashewastaken 1d ago
To all of people who said stuff like "Math is useless in the real world!" (Yes I'm not kidding. People in my college said this. College.) And "I'm never gonna use a protractor in real life", this is where you use it Kyle.
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u/valcoa06 1d ago
I don't know how school works in other countries, but here in Italy this is not thought in math class. There is another subject called "disegno tecnico" where they teach you this things and it's not math related at all.
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u/GlassCharacter179 18h ago
I am a physics teacher. Somehow the kids who are all complaining about “when do I need this in the real world” all want to be pilots.
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u/Ashewastaken 10h ago
Some of them definitely believe the "Just flip a switch and the plane will fly itself" myth.
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u/CommanderOfReddit 2d ago
How do I get the right size on the compass?
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u/partial_to_fractions 2d ago
The compass is set to the distance between the center and the intersection made at the 23 second mark
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u/PSPs0 2d ago
Explain how you knew how to set up the compass!
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u/boeringuy 2d ago
He knew the diameter of the pipe already.
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u/nobanjostring 2d ago
I think that's his point. This video is dumb. All that is needed is the diameter of the pipe, which you get from the parallel pieces. Set the radius on the compass, find the center of the board and draw your arc, the rest of it is pointless theatrics.
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u/djuggler 2d ago
Wasted 1/2” of wood
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u/Agreeable_Work4668 2d ago
That is more complicated than it should be.
Find the middle of the wood, set the distance on the pencil compass. Trace and cut.
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u/sweablol 2d ago
No, he also needs the correct depth. That’s what the measure with the protractor give him- the exact place to draw the circle with the compass so that it fits snugly.
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u/Ambroser2 2d ago
Here’s the fun thing about these kinds of videos: they make perfect sense, are fairly clear, AND will result in me massively fucking up if I ever try to replicate it
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u/bluewing 2d ago
Or this should be known as "Things you should have learn in High School Math had you been awake"
Bloody basic geometry.
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u/PomegranateWooden128 2d ago
is there a complete guide on how to measure/cut for different shapes/situations?
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u/TechnologyChef 2d ago
This needs to be in geometry class for when the kids ask, "Why do I need to learn all this" . Of course they may still miss it since the next idea will be that they aren't going to get a certain type of work for something they think will pay them a lot. At which point it gets to the real lesson that the class will help them think better and deeper to help humanity in a lot more aspects than fixing up the installation of a wooden floor. Nevertheless, I do hope if any floor installer is hired that they can do this quality of work rather than just cover it over with the nearby baseboard. You can tell who actually took their time and has pride in their work as if it is their own house.
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u/Forsaken_Gate1147 2d ago
Why make all of these extra steps when you can just use boolean?
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u/-32768 2d ago
I often find myself having to fit a 45 degree board into a 90 degree corner which has a perfectly placed pipe nearly the width of the span and both sides of the midpoint are 100% symmetrical. That's how I knew this video wasn't just an elaborate setup to show geometry tricks for views.
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u/grishkaa 2d ago
Is there a law that requires any woodworker who makes short-form videos to use that editing trick when cutting wood? I mean it was only cool the first fifteen times.
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u/SilentUnicorn 2d ago
Now do it with a square end on the board, the way they come.
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u/Thefuzy 2d ago
Like this is some gotcha? He would simply just start with 2 vert side lines and then use the compass, it would be way simpler than what is shown here.
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u/penoisbongo 2d ago
Yeah nowhere in this video does the placement of the lines depend on the shape of the board
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u/_Kramerica_ 2d ago
It wouldn’t be any different except his first 2 cuts would have to be the angled pieces.
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u/Brumpl3stiltskin 2d ago
This guy cutting perfect angles and precision, meanwhile I still haven’t stopped stubbing my toe on the same table leg for 8 years.