pollenface
Solar Addict
Don't know. I was just giving my thoughts.How many empty shipping containers are in the world right now.
I would think most wind would blow through this laterally. Uplift is what I am worried about
Don't know. I was just giving my thoughts.How many empty shipping containers are in the world right now.
I would think most wind would blow through this laterally. Uplift is what I am worried about
Depends on if you are talking about rolling it along or if the sail dragged it with brakes applied. A couple of guys can push a fairly heavy car or small truck (You see those strongman exhibitions where a big burly guy pulls a semi). I can push and pull a 1-ton pallet load around on my shops floor with a pallet jack. However lifting it is a bit more difficult for me now that I am old and feeble.2. On a movie set I have seen a 20' X 20' rag on a frame pull a truck when the wind came up suddenly.
Depends on if you are talking about rolling it along or if the sail dragged it with brakes applied. A couple of guys can push a fairly heavy car or small truck (You see those strongman exhibitions where a big burly guy pulls a semi). I can push and pull a 1-ton pallet load around on my shops floor with a pallet jack. However lifting it is a bit more difficult for me now that I am old and feebl
sorry, it was good input. you got me thinking how much wind it would take would blow over a shipping container. my initial reaction was if they are suggesting i need to secure my pergola to wind speeds equal to what would blow over a shipping container -- that it would be a mute point where i am. there are loading docks and semi trailers all around me, and if the shipping containers start flipping over.... they are going to crush my pergola anyways.Don't know. I was just giving my thoughts.
You are right, it rolled a couple of feet before we noticed. It was a stake bed parked in the grass, so at least a 1 ton truck. No idea if the brakes were set, but it must at least have been in park. We often tied rags off to whatever trucks were handy when they weren't working so we wouldn't have to take them down until we were sure they were no longer needed for the day.Depends on if you are talking about rolling it along or if the sail dragged it with brakes applied. A couple of guys can push a fairly heavy car or small truck (You see those strongman exhibitions where a big burly guy pulls a semi). I can push and pull a 1-ton pallet load around on my shops floor with a pallet jack. However lifting it is a bit more difficult for me now that I am old and feeble.
i do not own the pavement and have to leave everything as i found it. once holes are in the pavement, water get's under, and frost heaves will ruin it. A big part of this design is the ability to dismantle in several years. if this was staying long term, it would be deep concrete tubes in the ground and done but it is not on the table right now.I'm in So Cal and our top winds in this area are about 70 mph. The wind rating has to be for 110 mph to be approved/permitted. My arrays required almost 10k-12k pounds of concrete ballast at the base to meet this stress level. They are not big arrays and are comparable to what is pictured. You can fill sola tubes to meet ballast needs since you can space them every 5-8 feet, you can build 24x24x24 inch concrete cubes and have them sunk partially into the ground and the poles put into them when the pour happens. They will weight about 1k pounds each. And you can pour a concrete ground perimeter between and including your posts that would be about 18x18x12-18 to create the ballast.
To me, the problem with building with wood is either having it inserted in the concrete during the pour and not coming loose or rotting over time from water intrusion or bugs. Bolting down a wooden post to concrete may sound good, but I think it is important to know the load capacity of the threads (like Simpson strong ties) in the bolts to get the correct depth and number needed to be safe from wind damage.
Many building supply and fencing companies sell adapters so that you can sink a galvanized steel post into concrete and then place a vinyl post over the steel one using the adapter for appearances.
Just my thoughts.
Lastly, the man who uses Superstrut is a smart man IMO!
what is a 20x20 "rag"?You are right, it rolled a couple of feet before we noticed. It was a stake bed parked in the grass, so at least a 1 ton truck. No idea if the brakes were set, but it must at least have been in park. We often tied rags off to whatever trucks were handy when they weren't working so we wouldn't have to take them down until we were sure they were no longer needed for the day.
I know here in So Cal we have many businesses that specialize in water storage tanks. and water weight is about 8 pounds per gallon. So just like a patio umbrella, water storage tanks can be used as ballast in places where ground penetration is not practical. Even on craigslist there are many persons selling the used liquid transport containers that can be filled and easily drained.i do not own the pavement and have to leave everything as i found it. once holes are in the pavement, water get's under, and frost heaves will ruin it. A big part of this design is the ability to dismantle in several years. if this was staying long term, it would be deep concrete tubes in the ground and done but it is not on the table right now.
making wood forms for oversized concrete blocks on top of the pavement was my first thought, but when it's time to dismantle this later, the project is more involved getting rid of the giant blocks. restacking cinderblocks onto pallets later is clean and simple. giving the cinderblocks away for free on craigslist would be cheaper and easier than borrowing a bobcat and paying for a dumpster full of concrete waste.
thank you for the input on weight. it sound like i am halfway there to compare to your setup designed for 110mph. and yes, i have since realized i can bolt the panels to superstrut, thank you!
That would affect the diffusion. They would need solar panels with variable translucency.hmm. they should put solar panels on the other side. what a waste!
Not a bad idea. IBC totes typically hold 275 gallons. That’s 2200lbs each plus the 120lb tote.I know here in So Cal we have many businesses that specialize in water storage tanks. and water weight is about 8 pounds per gallon. So just like a patio umbrella, water storage tanks can be used as ballast in places where ground penetration is not practical. Even on craigslist there are many persons selling the used liquid transport containers that can be filled and easily drained.
I do understand your issue though.
First: In my experience with concrete slabs, they are about 4-6 inches think and may have steel rebar in them. Simpson makes a specific concrete bolt product that you first drill out the hole in the concrete say using an SDS hammer drill, then vacuum out the dust, then bolt the post holder to the slab. The Simpson bolts have special threads to bite into the concrete. You will need a ratchet to turn them or good wrench. I think they also make some bolts where you fill the hole with epoxy too.I would think you can mount hurricane ties to the post bottoms, and use 12" lags drilled into the pavement, then fill in the holes when you take it down.
It's not going to blow over, and I have mentioned: at least 4 times pentrating the pavement is not part of the solution.I would think you can mount hurricane ties to the post bottoms, and use 12" lags drilled into the pavement, then fill in the holes when you take it down.
Great suggestion, thank you. I have a few people I can ask, I see these types of things around and wish I had thought of that sooner.About 10 years ago I was able to get these for about $35 each when I was doing erosion control. No idea what they may cost in your area nowadays.
Concrete Bin Block | 48 Barriers
2'x2'x6' Concrete Bin Blocks are a generic term to describe interlocking, stackable concrete blocks.48barriers.com
They were delivered with a crane truck that lifts them off by the center cable loop. My backhoe could take them from there but it was a good grunt for the old girl (Ford 655).
Lots of weight, nicely distributed and easy to remove when no longer useful. Lawn and garden places use these to build pens for mulch etc. and may want to buy and remove them when you’re done.