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| Hello,
I would like to build trellises from steel electrical conduit for vine-type garden vegetables (e.g. squashes, melons). Can someone give me some guidelines on the load-bearing capacity of different sizes of steel electrical conduit? For example, if I have a six foot span of conduit, how much weight could I expect it to comfortably support and how does this weight change with the diameter of the conduit? Are there some tables online where I can look up these values? (I tried a Google search but wasn't able to find anything.) Although some of the plants I'd like to grow are fairly lightweight (e.g. green beans) so load-bearing capacity won't likely be an issue, some others (e.g. watermelons) can produce fruits that weigh 30 pounds apiece. With the possibility of having a number of fruits at once being supported by a single trellis, this could be an issue. My goal is to figure out the right size of conduit to use - something that's definitely strong enough (e.g. including a margin of error) - but not unnecessarily large as the cost to buy conduit and fittings rises with diameter. Any useful guidance you could give me on this would be much appreciated. |
Follow-Up Postings:
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- Posted by grow-anything (My Page) on Wed, Mar 17, 10 at 17:34
| Sorry, I never did a stress test on conduit, but I have used it for many different projects. The 10' pieces are really cheap, but it is the fittings that are costly. If it were me then I would just buy a 10' piece of something like 1" and see if it will hold what you think will be the weight of the stuff you plan to plant on it. If you can tie, bolt, screw or weld the conduit you could save a lot in cost. Unless you plan to hang a cow on it at some time I can't see how you would need anything much bigger. I am sure 2" would hold twice as much, but that would be overkill. |
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| All metal tubing(conduit/pipe) is stronger vertically then Horizontally. Their should be 1 foot in the ground for every 3-4 feet that is out of the ground to a height of 10 feet. |
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