All right let's look at these models We've already talked about the Quonset house
The limitations of it It's an arch, folks, the strongest structure
It just is But there are some limitations with the, uh,
What you can do close to the side of the house Any structures, in my opinion, of less than
20 feet in diameter They're just too, um
Offer too much obstruction When you try to work close to the house
20 foot and beyond? I mean, I still like these Quonset houses
But to get a little bit more room Think about these straight wall houses
Gives you a little more shoulder room ,headroom This is the house that we mentioned earlier
-- this bowed structure The arched hoop house
It does give you alittle bit more shoulder room
You notice it bows out a little bit -- about a foot
This is a 20-foot model If you're looking for, again, heat, a way to
dissipate heat Build them tall
I think Lewis talked about that Build the houses high
And then utilize that flue effect This is on the leeward side
You always want to put that third vent on the leeward side
If you make a triple-vent house Let the wind blow in from the opposite side
of the house And ventilate that house
Ridge vent? This is the most efficient method But, again, how are you you maintain that vent?
Boy, trying to get up there and put that on and then repair it
It's a little bit difficult The Gothic ...
If you're in a snowy area, yeah, do this We don't see a lot those here, for obvious
reasons One thing about these structures, though
The film will flop and ... flap, I should say Because it's hard to get something tight against
the flat surface If it's curved you can set plastic down around
it, right? So, a lot of these guys will use the tape
Or any type of a rope or strap To keep that from flapping in the wind
These field scale tunnels... Guys, these were made originally to be taken
down They were not a full-year structure
These posts have augured tips on them They're actually augured into the ground
You hook the hoops to them and put the plastic on
After the crops finish, you take the plastic off Take the structure out of the field and move it
But, you know, it takes work So people were trying to use these as full season
structures And they're cheaper
There's not as much steel And they do blow down
This is our structure here But this one didn't last for us
And it was simply when we were trying to cut our costs
See how it worked? Well, this is not acceptable
Now, a lot of the people who make these ... Manufacture these types of houses
Have strengthened their end walls That they are attached to
And they've also increased in number of purlins they put in them
But still I think you need to be careful where you put these
Some of the portable models ... This is a lift and tote
This is actually an Ohio structure that we saw on a tour
You notice the cross members It's designed to be picked up and moved off
of the site Now, you don't do this on a windy day
But, you know, when it's still And you're growing crops in there that are
.... Like, lettuces, leafy greens, strawberries
No problem You can lift it a few feet and move it
Frontwards, backwards, sideways You just needed some help
They're not that heavy But you do need help
And he's spaced these about every 12 feet So, you know ...
One person can handle a 12-foot section on a calm day
This is a roller mounted ... This was the same house that Dr. Jett showed
This is actually the same field day There at Penn State
The ??? house ... Again,very important to have a level structure
If you wanna keep the rollers on the ground A level site ...
I've seen them pop off their pipe track Thank you, thank you very much
But, hey If you're willing to take the time to anchor
them properly And you know the restrictions, like on any
structure They can be successful
We don't have that many of them inOklahoma, as of yet, that I know of
There's a skid-mounted type This is a University of Arkansas, um, tunnel
Needs to be a little thicker steel, right? So that they don't bend on you
And, again, It's curved up like that so they don't get stuck
in the ground When you're trying to move them
Some kind of a wench ... Some type of a ...
You know People hook tractors to them -- move them
But these have their limitations too Don't try to move too fast over undulating
ground And take your time
The hybrid structures are a combination of a permanent base
With removable hoops This is our poly pipe house
Hanley...Todd Hanley Actually, this is Steve Hill's house,but it's
Hanley design This is a square tubing and it's a similar
type thing You can remove the hoops quick
You leave the ground post in the ground In this case it's just a piece of rebar that's
holding it down But, fairly easy up and easy down