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DIY Pergola - 2 or 3 post?

We are thinking to build a attached lean to Pergola and the length would be 450cm and width is only 240 cm. The post I will use is 4x4 and the joist will be 2x6, can I get away with just 2 posts or I need to install 3 posts?

Your help will be appreciated.
save for the rainy days

Comments

  • FreeBear
    FreeBear Posts: 18,297 Forumite
    Tenth Anniversary 10,000 Posts Name Dropper Photogenic
    I did a (roughly) 3m by 4m with a 3x3 post at each corner and 4x1 timbers to span the gap. Yes, a bit flimsy, but it should hold up the vines I'm growing quite nicely.
    Any language construct that forces such insanity in this case should be abandoned without regrets. –
    Erik Aronesty, 2014

    Treasure the moments that you have. Savour them for as long as you can for they will never come back again.
  • Alnat1
    Alnat1 Posts: 3,897 Forumite
    1,000 Posts Third Anniversary Photogenic Name Dropper
    Look at the ones available to buy as kits online and see how many posts they have for a similar size. 
    Barnsley, South Yorkshire
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