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Electrical Conduit vs White PVC

Discussion in 'Greenhouse - Shade house.' started by Rob, Oct 8, 2012.

  1. Rob

    Rob Super Moderator

    Jan 3, 2010
    PM sent thanks ccbear.

  2. Walks-In-Storms

    Walks-In-Storms New Member

    Jun 17, 2011
    I'm belated here, but for what it's worth (and I was remiss in not mentioning it earlier), I, too, have used plastic pipe filled with concrete ("Sakrete" or the like) for posts and vertical support beams in my greenhouse. When I put a greenhouse over my new growbeds (as I soon will), I'll add "rebar" in the form of heavy wire - that especially for horizontal beams and the like.

    Just be careful that the cement-filled member or members doesn't become too heavy: If you observe the (mathematical engineering) rule of not exceeding four feet between support members, you won't need the cement. I've used cement mostly when I had to drive a length of pipe into the ground. Cement or concrete reinforced posts are ideal for this locale - strong, won't rot, impervious to termites, and the like.

    If I can be of assistance with any more of my experiences having to do with the matter, I hope you won't hesitate to ask (lots of experience).

    Oh, and by the way (something someone else mentioned here, I think), you can avoid trouble with pouring the cement (into smaller diameter pipe, for instance) by just making the stuff "soupier" - stand the pipe on end with a screen under it, and the excess water will drain. Concrete and cement almost literally "suck" water, you know (I use a sprinkling of concrete to deal with our Texas clay when digging: the stickiest stuff god ever made, it can be made to behave with a shovel - "scour," we say in Iowa - that way.

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