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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: 18,072 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.
    Her courage will change the world.

    Treasure the moments that you have. Savour them for as long as you can for they will never come back again.
  • Alnat1
    Alnat1 Posts: 3,816 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. 
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