Size on 5 degree angle

[Dan]

Righto I just want someone to check my math here.
I am putting in a reverse roof, basically a roof under a deck to drain the water away and essentially make the area somewhat weather proof.
I am just using corry for it and am going off the base measurement for laser light which requires the largest pitch of the stuff available on the market of 5 degrees.

So the distance it has to cover is 3.45m roughly though a gutter means this will likely shrink to around 3.35m

So if my math is correct and it has been at least 13 years since I last calculated the size of a side on an angle but the drop from top to bottom on a 5 degree angle across 3.45m is roughly 30cm
Does that sound right to everyone else or have I got my units wrong somewhere?

This just seems like a large pitch for a smallish area. I can probably peg this bac to 3 degrees if needs be also

 

[globaleagle]

yes.*

the lack of responses made me and my friend Jim beam lol.

*I accept no liability for this answer.

In on page one!

I am thinking of deleting this.

edit, it does sound right.

 

[Boofhead]

Hi Dan, I used this calculator http://ostermiller.org/calc/triangle.html and it shows 270mm so, yeah, pretty close.

 

[Dan]

excellent thank you. I am going to buy roof sheeting that has a 2 degree angle because 30cm really kills the head room 🙂

 

[globaleagle]

you're welcome.