'll agree with cole that the Perlin clamps, aka cross- Connectors, will make a strong connection and the source cited is about double the price you need to pay. Depending on where you are there are 3 sources in PA that can provide them at half that price. One source just sent me 30 - 2 3/8"x 1 3/8 ( I'm still looking for more of that size). However for your size pipe you also might want to consider hose clamps. You can open and intersect the hose clamps and they are quick and easy to use if you have a drill driver. SS- 1.5" hose clamps cost ~$.70 each(you'll need 2/connection) but I just bought a bag of 100 (non-SS) for $10 at a flea market. I used them to install a new electric line in my oldest greenhouse. I wanted the lines to run parallel so I unserted a standard washer between the hose clamps. It looks good IMO and is sturdy. Stainless is good but if you are concerned about price I would go with galvanized. How often are you going to need to move it? If concerned about strength I'd use a 3/8" or even 5/16" diameter bolts but only to hold one of many types of clamps. They aren't that much different in price. If you don't want the clamp to slide, such as for a hip board, then a 1/4" tech screw would be adequate.

'Nuther Californian here. Northern Cal. San Jose to be precise! I was far more "Active" on GW last year, while we were constructing my 6x8 HFGH. Been too busy with "other stuff" to post much lately (My apologies!!!). I'm on my 2nd winter with my GH and... So far, So good! My GH is primarily for overwintering "marginals." I've got a Tropical Resort Yard in a Not-So-Tropical climate. Last winter, I had great success w/my marginals in the GH - and I'm expecting the same this winter! This year, I also experimented a bit w/Hydroponics. DH bought me a HydroFarm MegaGarden System for Christmas last year, and I had WONDERFUL success w/tomatoes grown in the GH - even thru summer (although whiteflies got to be a real PITA by the end of the growing season!) (To say nothing of the veritable Rube Goldberg arrangement of pantyhose and assorted ties used to "trellis" the vines all over the GH! I wished I'd snapped some pictures of THAT!!!) (Although, truthfully, the Toms grown "in the ground" had better flavor - IMHO. But the Hydro-Toms were amazingly productive!) ...Now NEXT WINTER: My Big Challenge is gonna be "How the heck am I gonna fit these Plumies in here?!!" In fact, that's kinda/almost a fear for *this* year b/c if they grow AT ALL while they're in the GH - I have no clue how I'm gonna get 'em OUT! (If need be, I'll partially de-construct the GH to extricate them!!!). Yeah, Poor Me! My Plumerias are turning into trees! Oh, and like agardenstateofmind, I had to forego the chair in the GH :::sigh::: Actually, I don't think I'm EVER gonna be able to fit it back in there!!! Take heed, Newbies: When they say you'll outgrown your GH in no-time, they're not kidding!!! :-) -Nancy (aka IMQTPI)

I'm so sorry to read about this...I can only imagine how upset you are, especially watching it happen. I'm glad it was empty (small comfort I know.) It's good you had the panels screwed down, at least they didn't end up in neighboring counties... I agree with foxesearth, a sturdy foundation and anchoring system is going to be critical when you rebuild. Here's my link too, so you can see how we anchored our foundation to the ground, and then anchored the GH to the foundation. Compared to some foundations you'll find in the archives, ours is very simple. (Do a search for HFGH 10x12 and you'll have tons of reading.) We feel confident we had quite a few 50mph wind gusts this spring, right on the doors of my GH (tightly clamped shut of course) and no problems at all. my HFGH blog I think you'll find Harbor Freight will order almost any part for you, but the problem is their awful record on shipping time. In spite of what they tell you when you order, many members here have had to wait a year (no kidding) for promised replacement parts to arrive. I've emailed Harbor Freight about this terrible record on shipping times, but did not receive much encouragement that they plan to do much about it. So, I'm guessing that might be a bit of a challenge, unfortunately. :-(

Nathan: Yes, that is what we were told, more or less. If memory serves, it goes back to a time long ago, before we replaced all of our windows with thermopanes and needed replacement screws to hold the aluminum frames of storm windows. The man at our local hardware store (Oh, for the days of real hardware stores!) told us not to use anything but aluminum or SS, or the screws and/or aluminum frames would corrode. He didn't explain WHY though, or I've forgotten, but your explaination would make sense, especially in a GH that uses water that has been treated for hardness. But why is SS exempt? Or is it simply LESS prone to the reaction? I think I understand why BC supplies only SS fasteners with their GH's instead of aluminum though: it's simply too soft for such use. Thinking back; that was why we needed new screws. We had removed the storm windows to paint the window frames and the aluminum screws furnished with them had stripped out in the process.