• Post Reply Bookmark Topic Watch Topic
  • New Topic
permaculture forums growies critters building homesteading energy monies kitchen purity ungarbage community wilderness fiber arts art permaculture artisans regional education skip experiences global resources cider press projects digital market permies.com private forums all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • Anne Miller
  • Nicole Alderman
  • r ranson
  • Pearl Sutton
  • Mike Haasl
  • paul wheaton
stewards:
  • Joylynn Hardesty
  • Dave Burton
  • Joseph Lofthouse
master gardeners:
  • jordan barton
  • Greg Martin
gardeners:
  • Carla Burke
  • Ash Jackson
  • Kate Downham

!!! the first wofati greenhouse design

 
master steward
Posts: 8691
Location: Northern WI (zone 4)
2493
hunting trees books food preservation solar woodworking
  • Likes 2
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I can't really confirm or deny the math, but if it's accurate and you have 240 lbs of weight spread evenly along a 4' long 3.5" diameter pole, it'll be fine.  Take that same pole and pretend a 240 lb person is hanging from the middle and it will barely deflect.  And that's with a point load at each hand.  Spread out their load and they'd barely bend it.

I'd probably try to aim for the fat end of the poles to be under the heavier parts of the roof.  So probably all the poles would have their butt end into the depth of the wofati.

The 10' span of the purlins may be a bigger concern.  Use fat logs for those
 
Posts: 27
Location: Harrodsburg, United States
12
dog chicken pig
  • Likes 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Josiah, have you had a chance to look at the document Julie mentioned? It has some very applicable data, at least if the species are comparable to what you have there at Wheaton Lab. The Montana Fish and Wildlife website indicates the predominant species of tree is either Douglass fir or Ponderosa pine, I believe they are typically considered to be slightly stronger than the spruce listed in that document. The numbers I saw seem to confirm Mike's comment that the beams and rafters are a bigger concern than the actual 3.5" roof poles.
 
master steward
Posts: 14246
Location: Pacific Northwest
6456
hugelkultur kids cat duck forest garden foraging fiber arts sheep wood heat homestead
  • Likes 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Dez posted these great pictures of the greenhouse build in his Bootcamp thread. I don't know if anyone spotted them there, so I wanted to make sure you saw how it's coming along. It's super exciting to me!





Am I right in assuming that these are the posts surrounding the trench area, where I drew the lady standing?



 
Posts: 17
8
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Could you please point me toward the discussion on how the thermal wells were installed? I'd like to try putting in a thermal well and setting a water tank on top to prevent freezing in the winter. Thanks!
 
master steward
Posts: 32685
Location: missoula, montana (zone 4)
hugelkultur trees chicken wofati bee woodworking
  • Likes 3
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
You mean this?  https://permies.com/wiki/145105/wofati-greenhouse-design-build-raw

 
Mary Combs
Posts: 17
8
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Yes - thank you - one of the videos has an explanation that you used an excavator - dug out a platform for the excavator at the depth its arm extends to and then dug the rest of the depth from that platform. I have an excavator - though I'm not sure the maximum depth it will dig. I'm also not sure I have 30+ feet of cover - but it would be a fun fact to discover when I have the time to try out this technique. I was hoping you had some clever method of drilling a hole to set the casing into, without the expense of a well drilling company. if it is just a matter of digging it in, that's within our capabilities. Its just that disturbing that much ground will create a mess that will take at least a year to settle - and the area around a water tank is going to potentially stay sloppy for a lot longer once the ground is disturbed. I'm interested in any other thoughts you might have on this application of a thermal well.
 
Posts: 58
Location: Mid-Missouri
4
forest garden fungi tiny house
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Are the live zoom discussions being recorded?

If yes, is there a thread with a listing for them?

I'm unable to attend the live zooms but would like to follow along as I'm hoping to be able to build a similar structure this November. A single resource with all the relevant designs, plans, discussion threads, zooms, would be wonderful.
 
Posts: 92
Location: Pacific Northwest
42
hugelkultur forest garden fungi trees foraging wofati cooking building solar homestead
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
They're being recorded for the movie, not sure if they're planning on releasing them in their entirely
 
paul wheaton
master steward
Posts: 32685
Location: missoula, montana (zone 4)
hugelkultur trees chicken wofati bee woodworking
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
We do a zoom thing 3 times per week.  All 3 are recorded so taht bits might make it into the final movie.  The friday sessions are posted cuz that was what we offered to the kickstarter backers at $50 and up.
 
paul wheaton
master steward
Posts: 32685
Location: missoula, montana (zone 4)
hugelkultur trees chicken wofati bee woodworking
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator

I was hoping you had some clever method of drilling a hole to set the casing into, without the expense of a well drilling company.



We've talked about this quite a few times.  We think we can make a hole about six feet deep with our electric auger.   And there are some ways of making holes by hand that are super slow.  We are open to more ideas.  

Here's a possible idea:  https://permies.com/t/54084/permaculture-projects/Digging-extendable-post-hole-auger

So - put a tall post in the ground next to the hole, or maybe set up a tripod.  Maybe something could be dug 20 feet deep in a few hours.

 
paul wheaton
master steward
Posts: 32685
Location: missoula, montana (zone 4)
hugelkultur trees chicken wofati bee woodworking
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
From dez's thread:

gift
 
Unofficial Companion Guide to the Rocket Oven DVD
will be released to subscribers in: soon!
reply
    Bookmark Topic Watch Topic
  • New Topic