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30th August 2013, 05:07 PM #1
Optimum Hip Roof Creeper Timber Lengths
If you add the shortest and longest creeper lengths in a hip roof, from the resulting length you can cut all the creepers in the roof with no waste.
For example, in the roof plan below, the longest + shortest creeper ~ 4187 + 637 = 4824
From 4824, you can cut first and last, 2nd and second last, 3rd and 3rd last and so on.
So this would be the optimum length ( plus a bit of waste ) to cut the creepers from, to have minimal waste.
You could cut all the creepers in this roof from 28 lengths of 4824.
Obviously this depends on the available timber lengths.
I've added this calculation to the hip roof calculators at blocklayer.com. Roof Framing Calculators - Hip + Gable Roof Framing - Online
Is there a better way to do this?
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31st August 2013, 01:20 AM #2Banned
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Yeah
Is there a better way to do this?
You can order it in any length, even pre cut, there's no waste, the termites don't eat it - it doesn't burn in an ash Wednesday style fire, it doesn't sag over time as green timber roofs often do...
Honestly - in this day and age i just think maybbe timber roofs have seen their time - sad as it makes me to suggest this.
Steel probably would have a better cyclone rating as well... in terms of attaching to the top plate and the tex screws holding down a corrugated metal roof... and so it goes...
As a former forester -what am seeing os the end of old growth logging - harvesting is into second rotation now, in production forests in all but maybe Tasmania so long length beams in anything but premium straight large dia logs is wasteful because so many pieces don't make the grade...for structural rating.
Sure - it can be fire treated, termite treated, laminated, made into trusses, and so on... but having had a building I built, hit by a full on winter tornado, the entire roof ripped off, and the timber trussed roof beams - not one piece of timber longer than 6 inches....left intact... you get an appreciation for what the changing weather under global warming (cooling - take your pick) it seems that we are headed for more and more 'unusual weather events'.
Heck a water spout came ashore here in Perth only a week or so back and tore thru a multi story construction site - putting about 6 workers in hospital and stripping the scaffolding off the whole building!
I'm all for steel these days... and as a former forester & carpenter of sorts, it really pains me to say that!
My 2c
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