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Reply With QuoteOur carport is skillion, sloping away from the house, and is attached by extenda brackets so conceptually it will work for you. You do realise you'll need a permit for this?
gable pergola - are these numbers ok? <thank god for restore autosaved content!>
Hi everyone
we have/had a flat roof pergola that was attached to the fascia that had to be torn down to fix some roof and gutter issues. And it had its own issues too (the posts were resting on the stirrups and had rotted out to the first bolt or worse + it had metal roofing and was way too hot in the summer, roofing didnt extend over the end rafter so the top of it was rotten etc)
a rental we used to say at had a really nice gable roof pergola on brackets that came up through the house roof - that really made it airy so i'm looking at putting up something similar
Ive been reading through the old forum posts about gable pergolas and just want to sanity check my design to make sure i understand everything properly
limitations/specs for my design
* suburban south adelaide. in the middle of a n1 zone
* polycarbonate sheets
* gable roof
* size is approx 10400 x 5400 including overhang
* not attached to fascia. attached to the house via extenda brackets on the 10400 end
* shallow angle - ~15 deg. Our rectangle house roof is a simple gable roof @ 15 degrees and we have solar panels. I want to minimise the shade
* budget - stick to regular treated structural pine and have joins over posts etc. the house is small and a budget/cheap 80s home, so cant we overcapitalise in this and have to put off other renos. Just some functional shade.
something that kind of looks like this but with extenda brackets -
here's an ms paint design
5 posts, 2500 apart
my rafter length is ~2800 (1400mm rlw?)
according to my reading of span tables @ 900mm centres, as a minimum i can use (mgp10 h3)
120x35 for the rafters. Same size for ties between rafters
120x45 for the beams (4x on each side joined on the posts) but i'll probably go 140x45
90x90 posts
is that right?
collar ties - top 3rd? bottom 3rd? doesn't matter? (pics online show both)
is the shallow pitch a problem? ive looked at the prepacked softwoods pergolas and they're 20 deg and up
ridge board - what purpose does it serve in this setup? its not load bearing. Is it because its easier to attach 1 rafter at a time vs putting up the whole A frame and bracing it?
What size should the ridge board be? 1 size up from the rafters? 140x35? will that be stiff enough or does it need to be x45?
will these rafters and beams support colourbond sheets or just polycarbonate?
sorry for all the questions, i've built a few smaller structures but is a bit bigger!
thanks.
Our carport is skillion, sloping away from the house, and is attached by extenda brackets so conceptually it will work for you. You do realise you'll need a permit for this?
I am not responsible for anything that Moondog says!
yeah, i assumed i would. Even though the size/building envelope is the same as the old pergola, im not just replacing the rotten parts but the whole thing with a totally different designOriginally Posted by Cecile
this was more to see whether i was selecting the correct timber sizes (and for budgeting), or whether we'd need to build something smaller to keep within our budget
If you don't know the answers to the questions being asked, it' s best to leave such a large structure to a qualified chippy or builder to do.
In NSW you cannot build a carport unless you have a license, I would check your local rules for council approval of the structure and also who is allowed to build it.
I would be surprised as a non licensed Carpenter / Builder that you would be allowed to build this for obvious safety reasons, and council would want to see some sort of plans outlining all the structural elements.
I would start here first.
https://www.sa.gov.au/__data/assets/...assessment.pdf
Mieux vaut prévenir que guérir
Be prepared to be surprised. In South Australia a land/property owner can become an “owner builder” without any qualifications at all and undertake all building work other than plumbing and electrical. I have built two houses (95% physically by me) in South Australia and have absolutely no house building qualifications or training. Both were built before the internet was available to provide information.
“What a fool believes, he sees. No wise man has the power to reason away”- The Doobie Brothers
thanks for the links metrix - ive ready through that one before and the onkaparinga council one too when putting up sheds and a few other things
everything about mine is within the 'building consent only' requirements; (under 60sqm, posts under 3m, peak of roof under 5m). bunnings here sell diy pergola kits that are a similar size (10mx5m) but these are attached to the fascia and too steep for my requirements (+ ive priced up the included materials and its bit cheaper)
the local council 'do i need approval? wizard' would let me build it without even lodging anything if i was only putting shadecloth on it
I did the 10 week home reno tafe course that runs here about 2 years ago, and while this is bigger than building door frames, hanging a few doors, windows, building a gate or attaching a deck to house im pretty sure the basics of the tools ill be using were covered. i'm ready to give it a shot and learn along the way.
are there any gotchas i havent though of?
usebydate - yes haha, my FIL gave me an old alan staines home owner builder book, and aside from the mullets i read the section on SA saying there are no requirements for any licensing or registration, only needing subcontractors that do more than 5k worth of work needing indemnity insurance. i remember as a kid a few family friends self building their own houses, having 2 storeys with no stairs etc etc
i thought surely that's changed, but no, the only thing thats changed is the limit is 12k now
the pergola im replacing had the same coverage (aside from being attached to the fascia using a90x45 instead of extenda brackets on the top plate) oregon beams (85x85) and 4.6m 135x35 rafters @ 900m with a metal roof. That was put up by the previous owner and had approval
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