Help nedded with angles - maths
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twentysix by twentyfive
Clinging on tightly
- Location
- Over the Hill
If that is close to a plan view then you would be wanting horizontal strips along all four sides all angled downward? Is that what you are asking?
Archie_tect
De Skieven Architek... aka Penfold + Horace
- Location
- Northumberland
Use square posts.... [or, make a paper template, or, draw on the side of the angled verticals how much fall you want on each louvre and measure. The slope angles on diverging sides makes my brain hurt.... you'd expect it to be 22.5 degrees but it probably isn't!]
twentysix by twentyfive
Clinging on tightly
- Location
- Over the Hill
[QUOTE 3318294, member: 9609"]yes, but my brains too small to work out the angles[/QUOTE]
Once upon a time I'd have had a go. But my brain has shrunk too. How patient are you? If you are very patient I could attempt to solve your problem.
One way around this is to use square posts with corners lined up with the base. Then it's just a bunch of 45 degree cuts..........
Once upon a time I'd have had a go. But my brain has shrunk too. How patient are you? If you are very patient I could attempt to solve your problem.
One way around this is to use square posts with corners lined up with the base. Then it's just a bunch of 45 degree cuts..........
Peteaud
Veteran
- Location
- South Somerset
Is a compound angle, the 2nd angle will alter the 1st.
Easy way, 3D cad., just need to find someone who has it.
Easy way, 3D cad., just need to find someone who has it.
twentysix by twentyfive
Clinging on tightly
- Location
- Over the Hill
Ooops - should've read your other post
Tigerbiten
Guru
I wouldn't bother measuring angles.
Just clamp the louver so it sits at 45 degrees. A couple of 45 degree blocks with the louver sandwiched between will work.
Now a vertical cut at 45 degrees will give you all the correct angles.
Once you've made one cut, you can use it as a template to set the saw at the correct angles both vertically and horizontally..
Just clamp the louver so it sits at 45 degrees. A couple of 45 degree blocks with the louver sandwiched between will work.
Now a vertical cut at 45 degrees will give you all the correct angles.
Once you've made one cut, you can use it as a template to set the saw at the correct angles both vertically and horizontally..
Headgardener
Armchair Cyclist
It just looks like an upside down stool to me so I'm afraid I'm no help
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vernon
Harder than Ronnie Pickering
- Location
- Meanwood, Leeds
[QUOTE 3318252, member: 9609"]I am wanting to add some louvres to the following (think of a Stevenson Screen) I am wanting the louvres to be angled downwards at 45° So each cut will need a compound cut that gives two angles, an angle across the width and one across the thickness. I had thought 45 & 45 but that is clearly wrong.
[/QUOTE]
There's some key information missing - the dimensions of the cross section of the slats.
EDIT @Tigerbiten's method seems a lot easier.
[/QUOTE]
There's some key information missing - the dimensions of the cross section of the slats.
EDIT @Tigerbiten's method seems a lot easier.
slowmotion
Quite dreadful
- Location
- lost somewhere
I think I still have my dog-eared copy of Domebook One, a manual on how to build geodesic domes and how to make the compound cuts at the end of the struts. I think it had a fairly detailed chapter on trigonometry. I'll see if I can find it. I'm not sure if the ancient grey matter is up to the task of making any sense of it.
Fnaar
Smutmaster General
- Location
- Thumberland
Get one from IKEA 
Puts hand up... 3d cad is my job... Give me the dimensions of what you have and ill knock a model and a drawing up, only take me 5 mins. . .
Archie_tect
De Skieven Architek... aka Penfold + Horace
- Location
- Northumberland
Drawn it out on Archicad as a model.
To fit a 250x250 square base with 44x19mm 45 degree splayed corner posts with 45 deg angled louvres 19mm thick, the louvres would hit the splayed posts at an angle of 35.26 degrees. The louvres themselves will be 42 mm wide which if the louvres have vertical front and back faces will be 223 wide at the front leading edge and 164 wide at the back leading edge. If the square base is bigger than 250 on each side you just need to add the additional amount to the front and rear lengths to each louvre
To fit a 250x250 square base with 44x19mm 45 degree splayed corner posts with 45 deg angled louvres 19mm thick, the louvres would hit the splayed posts at an angle of 35.26 degrees. The louvres themselves will be 42 mm wide which if the louvres have vertical front and back faces will be 223 wide at the front leading edge and 164 wide at the back leading edge. If the square base is bigger than 250 on each side you just need to add the additional amount to the front and rear lengths to each louvre
twentysix by twentyfive
Clinging on tightly
- Location
- Over the Hill
Phew - I won't bother attempting it now
irw
Quadricyclist
- Location
- Liverpool, UK
Assuming this is what you're after, AutoCad throws out these measurements-
