COMPLEX roof - HELP! - Hip end with offset partial octagonal

Hi Chipperhead, Pawnhead is definetly putting you in the right direction. As i have done some 17 years of architectual conventional (stick) framing, my advice is to keep all hips and valleys running at half the angle of the wallplates that they are coming off. Who ever drew your architectual drawings has given you a bum steer! They are incorrect! A great book that will help you is the "Hancocks roofing manual", you should be able to purchase it from any (construction) tafe college bookshop. It will give you Rafter, Hip and valley lengths, as well as ridge heigths. A roof like this is impossible to explaine over a screen but Pawnhead sounds like he's your best bet!

Best of luck, Jason.:2tsup:

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Originally Posted by ex-chippie

Hi Chipperhead, Pawnhead is definetly putting you in the right direction. As i have done some 17 years of architectual conventional (stick) framing, my advice is to keep all hips and valleys running at half the angle of the wallplates that they are coming off. Who ever drew your architectual drawings has given you a bum steer! They are incorrect!

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Actually, I did the drawings myself. And they're not incorrect. If anything they're astonishingly accurate even if I do say so myself. In the end, I am sure I could have gotten away without them, and just used roof framing tables to pick up my plumb cut angles etc, but the drawings did help me get my head around how to set the roof out. If I HAD simply halved the angles of all my wall plates the roof wouldnt have worked. I would have had hip rafters that didn't meet. Pawnhead has definitely explained how to project the various roof planes around the place, and made it clear how well that technique works. I DID make a small mistake at the interconnection of the western broken hip and the valley, but nothing a bit of planing can't fix. I'm glad it's a tiled roof :B

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Originally Posted by ex-chippie

A great book that will help you is the "Hancocks roofing manual", you should be able to purchase it from any (construction) tafe college bookshop. It will give you Rafter, Hip and valley lengths, as well as ridge heigths. A roof like this is impossible to explaine over a screen but Pawnhead sounds like he's your best bet!

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I actually have a really neat basic roof framing book that has all that as well. I can't remember the name of it but it is a great 'join the dots' guide - to a basic hip ended roof for an L shaped building with different roof widths. Nothing this complicated. I've done all the calculations myself on this one, using a spreadsheet and some basic use of pythagoras and a little trig. It's all worked out very neatly in the end. The last two beams to put in were the eastern broken hip and its associated valley. They measured out to 15mm off what my drawings had estimated them to be. I reckon that's pretty good going. What has been a little disturbing is the depth of some of the birdsmouths, but I'll explain that in a later posting.

Anyway, all the structural elements in the roof are in. I just have about 15 rafters to go, all creepers and jacks. Monday. Photos are coming :)

Cooee fella's, daunting project, but like all things once you put your mind to it the only thing you cant do is wipe your bum with your elbow! All this talk of trig, I had to let you know about these calculators. I've had the same problem as others in that I forget all the trig stuff because I dont use it enough. This was really giving me the s%$ts, so I ordered one of these;http://www.jobbercalculator.com/tutorial.htm
No longer will you ever suffer bewilderment from trig, this thing is worth its weight in gold.

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Originally Posted by Carpenter

Cooee fella's, daunting project, but like all things once you put your mind to it the only thing you cant do is wipe your bum with your elbow! All this talk of trig, I had to let you know about these calculators. I've had the same problem as others in that I forget all the trig stuff because I dont use it enough. This was really giving me the s%$ts, so I ordered one of these;http://www.jobbercalculator.com/tutorial.htm
No longer will you ever suffer bewilderment from trig, this thing is worth its weight in gold.

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35mb :oo:

Does it give you a complete history of trig dating back to the pyramids or something?

I could explain it simply in a reasonable sized post. It's not that hard, but of course you need some intelligence and a bit of practice.

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Originally Posted by pawnhead

35mb :oo:

Does it give you a complete history of trig dating back to the pyramids or something?

I could explain it simply in a reasonable sized post. It's not that hard, but of course you need some intelligence and a bit of practice.

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For the mathematically challenged:o , its fast, accurate, eliminates human error & most of all it saves precious onsite time. If you can do all that without one (as some people can) I'm jealous.

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Originally Posted by Carpenter

For the mathematically challenged:o , its fast, accurate, eliminates human error & most of all it saves precious onsite time. If you can do all that without one (as some people can) I'm jealous.

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Oh, it's a running program is it?
That would save some time if you could just plug in your dimensions and come up with all your lengths and angles. And certainly it would eliminate a lot of potential for mistakes.

I thought it was just lessons on trig.

Its a construction calculator, but I sent you the link for the tutorial..sorry about the confusion.

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Originally Posted by Carpenter

Its a construction calculator...

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That's freaky. The irish carpenter I have (had) working for me mentioned these things. I'd never heard of them, and now two days later someone mentions them here too! Dont know where he'd seen them because all he's done before this has been fixing (or, in Ireland/UK, second fixing). He must have seen them in use in Ireland I suppose. I dont think I'd pay for the fancy 10-15 buttons, given that I could never work in imperial.

And yes, I say 'had' because he's decided to go travelling when I need him for another two weeks or so, and one of the apprentices has trade school all next week. Does anyone know a chip in Melbourne who wants a week or two's work? :)

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Originally Posted by ChipperChip

I dont think I'd pay for the fancy 10-15 buttons, given that I could never work in imperial.

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Take a closer look there Chipper, this is a fully functioning metric calculator as well as imperial. So yes, it also can convert between the two. http://www.jobbercalculator.com/metric_conversion.htm

I realise that. I'm not really interested in working in imperial at all, not even for conversions. For the VERY rare time I need to do that, I'm happy to do it long-hand. I'd rather not have to pay the extra as there are other similar devices that are cheaper.

But I can see that it's potentially a very useful piece of kit, if I did more roofs. Give me a $5 trig calculator and I'll be happy. Actually, a free software one on my iPaq will do :) Between that and my cad package at home I'm sorted for pretty much anything.

ps all, pics of finished roof by the end of the week. It has been a.... challenge :)

Yeh, that just looks like a normal calculator to me, Carpenter. Chipper's right. $5 should do it, or $0 on the web.
I thought you were talking about a 3D cad program.

And even more powerful for $0 on the web :)

Good for ordering concrete from very old concrete companies.

Even useful for the things you never knew you wanted to know, like how long it takes for sunlight to reach the earth.

Wow that's pretty cool. I didn't know you could do that.
Cheers :2tsup:

:)

And that's just BEGINNING to scratch the surface...

Yes I realise that there's lots of things you can do with Google.
On the OCAU website, there's a thread that mentions a way that you can use Google to search for web cams. You can tap in to peoples security cameras and operate them remotely. You can spy on people who are supposed to be working, or who believe that they have privacy.

I can't find the thread at the moment, but I believe that there's nothing illegal about it since the people concerned haven't looked into installing security blockers or encryption, and are thus offering the information on the web.

Cheers :o