Calculate slanted angle of stud

[Mjärn]

protractor: [media][link]

In the video, you get one degree for free, which allows you to calculate the rest. But what if I don't have any degree at all then?

 

[FredrikR]

In the video, you get one angle for free, which allows you to calculate the rest. But what if I don't have any angle at all then?

Then you have to decide the first angle, meaning how much the support should tilt.

 

[Mjärn]

Then you have to determine the first angle, that is, how much the support should tilt.

Okay! But how should I determine that? It's hard to know how to do it.

 

[Workingclasshero]

Hold up the board where it should be and trace it, sometimes you have to rough-cut the piece first to get it in place. How do you determine the angle? Either you line up the board so it looks good, or you line it up between the corners, or you aim at another board or just gamble on a 45-degree angle. Sometimes you don't know how far apart to place screws or how wide or long you want a specific measurement to be; I usually stick to the number 16—if that measurement seems reasonable, I go with it, and it works surprisingly well

 

[PatrikJo]

In the video, you get a degree for free, which allows you to calculate the rest. But what if I don't have any degree at all then?

Then you'll have to make an educated guess.
45-degree angles are (after 90-degree) the most common. If you have the option to use a 45-degree angle, you do so. Otherwise, maybe 60 degrees is suitable? Or 30? And if all the "standard angles" fit poorly, then you have to choose a different angle.
But measuring tends to be difficult. That's why so many recommend that you trace instead. Like in your example in the thread start: Rough cut a piece to an appropriate length. Place it against your build, and draw where you think it looks nice. If the angles then become 45 or 41, it usually doesn't matter.

 

[Öckeröhus]

Sliding bevel is a must-have in the toolbox! Smygvinkel | Clas Ohlson Very easy to use.

 

[FredrikR]

Okay! But how should I decide that? Difficult to know what to do

Have someone close to you decide for you?

 

[Workingclasshero]

Ask someone close to you to decide for you?
Which isn't a bad idea, sometimes you need help to get over the threshold -)

 

[Mjärn]

Ask someone around you to decide for you?

What do you mean decide? You can't just make up an angle, can you? Then it'll be wrong if you don't guess correctly?

 

[FredrikR]

What do you mean by decide? You can't just make up an angle, can you? It would be wrong if you don't guess right.

Of course you... you can, ask us when the saw is bought and we will help you.

Something or someone must decide how, for example, a support should lean, which means the first angle/cutting is self-evident, the second you get when you buy.

 

[[SKPG]Zamora]

What do you mean decide? You can't just make up an angle, right? Then it would be wrong if your guess isn't correct?

Yes, you decide yourself the slope the rule should have. Then you get the first angle 'for free'
Edit: says I, who always cut wrongly.......

 

[Workingclasshero]

What do you mean decide? You can't just make up an angle? Then it would be wrong if you don't guess correctly?

Depends on the initial values, should it be aesthetically pleasing or durable, often aesthetic is durable. Sturdy braces, solid fastenings do wonders, you'll guess correctly, go for it, dare to do it right ;-)

 

[droopy]

I am a complete beginner at carpentry. One thing I would like to learn to do quickly and easily is to calculate angles so that you get a batten to fit at an angle between two other battens.

I'm watching a video where a guy is building a bench, and as you can see in the picture, he has cut a batten at an angle that fits nicely there. How does he know what angle to cut the slanted batten at? Is there a simple way to do this?

There are several ways; on a 90-degree angle, you can calculate the hypotenuse (side A x side A + side B x side B and take the square root of this).

The carpenter's version is that a triangle always has a total of 180 degrees. If you have a 90-degree angle, the "middle part's" angles are 90 degrees divided by 2 cuts, i.e., 45 degrees.
For the carpenter's version, no calculator or direct math knowledge is needed; it's enough to know that a triangle's angle sums always are 180 degrees.

In the picture, it doesn't look like 2x 45 degrees; it could be 60+30 degrees (which is also the 90 degrees missing in a triangle.)

Maybe a poorly explained?

 

[maah]

There are several ways to calculate the Hypotenuse in a 90-degree angle (Side A x Side A + Side B x Side B and take the square root of this).

The carpenter’s method is that a triangle always has a sum of 180 degrees, if you have a 90-degree angle, the "middle angles" are 90 degrees divided by 2, thus 45 degrees.
For the carpenter’s method, no calculator or direct math knowledge is needed, it is enough to know that the sum of a triangle's angles is always 180 degrees.

In the picture, it doesn't look like two 45-degree angles; it might be 60+30 degrees (which are also the 90 degrees missing in a triangle).

Maybe poorly explained?

Well explained, I think.
As someone untrained in both mathematics, geometry, and carpentry, I usually try things out. Eventually, you learn and make fewer cutting mistakes (but you will always make some mistakes sometimes)