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  1. 7th September 2006, 12:56 PM #1
    Lbudgie
    Lbudgie is offline Novice
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    Default pitched pergola roof

    howdy blokes
    im having a bit of a problem at the moment.
    i am going to build a pergola out back. its going to have a thatched roof.:eek:
    therefor requires a piched roof. im planing on 35 deg. its 7.7m long by 5.4m wide. i have that decks and pergolas by that stain bloke but it does not mention pitched roofs so i thought i would ask the experts.

    # 1.. what size beams at the sides would i need? they will be suported by a pole at each end and one in the middle(3 total)at a total length of 7.7m
    #2.. what size rafters? i calculate that they woud be 3.3m long each side. for a span of 5.4m

    i have spent hours doing serches of the forum, its full of good info but did not find anything that covered what i needed.
    Im thinking of doing it in hardwood that would be stained or varnished.
    im 42 years old so i figer its got to last 30 years max, after that i dont care cos i'll be giving the nurses hell in a home(if i make it!)

    thanks for your help
    Paul
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  3. 7th September 2006, 01:05 PM #2
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    Bluegum
    Bluegum is offline GOLD MEMBER
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    Lbudgie,

    After reading thorugh your post i reckon that you might want to get hold of a copy of Alan Staines book. Building decks and pergolas. It will have all the spaning tables that your looking for. I think bunnings have them for about $25 give or take. As well as that I reckon there are a a few members that may be able to give you a fair bit of advice here as well.
    Dave,
    hug the tree before you start the chainsaw.
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  4. 7th September 2006, 01:15 PM #3
    Lbudgie
    Lbudgie is offline Novice
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    thanks for that bluegum, but i have the book, its great but does not answer what i want. it does not talk about pitched roofs.
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  5. 7th September 2006, 04:43 PM #4
    leeton
    leeton is offline Senior Member
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    G'day Budgie,
    Sounds pretty similar to the size of my roof, I am pretty sure I used 250 x 50 for the side beams and 200 x 50 (or maybe 150) for the rafters...all in pine...not absolute sure though...not at home to check at the moment...but if you are using hardwood I wouldn't think they need to be as big as that...
    mine has a colourbond roof...but I am not an expert, I am sure others would have different opinions.
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  6. 7th September 2006, 08:51 PM #5
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    Barry_White
    Barry_White is offline Deceased
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    Hi Paul

    Have a look here and you will find various span tables for timber. Just click on the link you require e.g. Roof Span tables.

    http://www.fordtimbers.com.au/dpr_span_tables.htm
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