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Mon, Nov 5, 12 at 14:32
| I plan to biuld a 2-post arbor like this. I will be training a bougainvillea on it. If I set the 4x4s 2 feet deep in concrete, do you think it will be strong enough? I hate to use larger posts, because I have a small yard, and I don't want it to be overwhelming. |
Follow-Up Postings:
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- Posted by Cole_Robbie none (My Page) on Mon, Nov 5, 12 at 18:58
| What's your soil like? You're probably ok as long as your ground isn't pure sand. Quikrete says to dig the hole 1/3 as deep as the post is tall. Mine are usually about 1/4, but my clay soil holds well. |
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- Posted by tomatotomata 10 (My Page) on Mon, Nov 5, 12 at 22:42
| Cole- no, it's not sand. I'm mostly concerned about the weight of the vine. If I have to put in 4 posts, I will, but I prefer the look (and the ease) of only 2. |
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- Posted by squirrellypete z7b GA (My Page) on Wed, Nov 7, 12 at 18:06
| I think 4x4s would definitely be strong enough, however from our experience they are prone to warping & bowing more than a 6x6 or larger. We encountered this when building our made-from-scratch greenhouse and in hindsight I wish we had gone with thicker posts. Some bowed and twisted quite wildly after a while and made it tricky to work around. Ours were typical treated lumber yard 4x4s. Maybe if you are able to locate some that are older and have a good bit of drying time you will avoid potential problems. |
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