I've already spent many hours on this problem, and I am sure if we add the hours other posters spent on it will be a pretty large number. Do people call you names if you refuse to do free work for them? That would be pretty rude in my opinion.
I assumed that [imath]45^\circ[/imath] is the pitch of the hip, not the base angle of the hip's horizontal projection. But in your drawing in #26 you show the hip's pitch as [imath]25^\circ[/imath], which I assumed to be the pitch of the gable. Looks like I misunderstood the problem from the beginning
Yes. See my post #29.
It seems that I've misunderstood the problem: I thought that the pitch of the hip is always 45 degree, but it seems more likely that the projection of the hip always has [imath]45^\circ[/imath] at the base. The corner might be mine to occupy...
That would explain why your result is close to @rooferpaul 's empirical observations.
No corner for you unless it is 45 degrees. You tried to help but got lost in the original description of the problem, which completely stumped me.
The formula is sensitive to small errors in measurement of angles. 23 degrees gives 1125 as a result.
This is exactly why I direct people (with practical problem) to face-to-face to meetings - misunderstanding "jargon" which changes from company to company. After 46 responses (thread/name-calling started Tuesday) - we have not given the op (or is it OP) a spoon-fed formula to regurgitate.
Good point. In case of someone studying math we can ask for the original statement of the problem, which in most case is pretty clearly stated. Communicating practical problems has often been a frustrating exercise in my experience ("why did not you say so from the beginning?") even in face-to-face meetings.
Which, of course, is why patience is needed ... on both sides. Even when it can't be face-to-face, it's best to have a one-on-one conversation about such a problem, in order to efficiently negotiate the details of the problem and iron out communication issues. (Lags due to moderation don't help, either.)
I agree with this. I thought it was probably worth repeating, in a large font, because it gets lost in the conversation...
My wife is a business analyst, and her work is basically full time "translation" between the people who have a business need and the people who can fulfill it (banking business speak <-> maths/ computer speak). But, we did get there in the end with this problem, I think
There's no reason to insult people who choose to only help students. These volunteers give up their free time to help people. If you were nice to them they might be more likely to help the next non-student. Anyway, I hope the expression/ calculator above are helpful to you. Please come back if you think we've made some kind of error.
NOTE: Then the calculated "rake", or cut-length, will also be from the centre of the first ridge to the centre of the last. The actual cut-length will be longer (across the whole width of the sheet)
I've used various "diy help forums" to get helpful free advice. Although with DIY it's hard to get a professional looking finish without having the experience that full-time builders have. Certainly plastering is harder than it looks, as I have found out
I did too - but those came from another homeowner - not from professionals touting free consultation (specially not roofers).I've used various "diy help forums" to get helpful free advice. Although with DIY it's hard to get a professional looking finish without having the experience that full-time builders have. Certainly plastering is harder than it looks, as I have found out