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[[Category:Hexayurt project]]
[[Category:Hexayurt project]]


'''WORKING ON THIS PAGE !!!'''
'''There's a substantial amount of text at the [[Talk:Hexayurt_Plywood|discussion page]]. It will be restored gradually as soon as the outline is clear. Use it now if you wish.''' [[User:LucasG|LucasG]] 07:49, 24 July 2011 (PDT)


I intend to clear up this page tomorrow:
Plywood hexayurt is the catch-all term being used for the family of frameless hexayurts constructed out of plywood or similar materials. The most notable alternative is OSB. They are not to be confused with the [[Timber Frame Hexayurt]]. Plywood Hexayurts lack any form internal framing.
* fix the text for this appropedia wikipage, and fix the whole page
[[File:Osb_hexayurt.jpg|thumb|upright=3|alt=Hexayurt made from OSB at Small is Festival 2010.|OSB Hexayurt.]]
* port it to universalsubs, turn it into subtitles, translate it into Spanish
* tell others so that translations to other languages are possible


[[User:LucasG|LucasG]] 14:34, 14 April 2011 (PDT)
== Plywood ==


= Current best descriptions =
[[File:Plywoodhexayurtsketchupwithmods.png|thumb|upright=2|alt=Sketch up models of Plywood Hexayurt.|Sketch up models of Plywood Hexayurt showing modifications.]]This is the primary hexayurt solution for disaster relief situations due to the materials used and ease of constructions. For disasters in extreme cold, use isulation board and the construction instruction in [[Hexayurt Playa]]


* Haiti http://vinay.howtolivewiki.com/blog/other/the-hexayurt-in-haiti-a-technical-description-1678
Hexayurts are basically made of panels and connectors. The design has been modified extensively because of issues that arise from constructing out of plywood with no frame. The concerns of Water-proofing, insect-proofing, fixing to the ground and portability are different from that of the more common polyiso hexayurt.
* http://files.howtolivewiki.com/hexayurt_in_haiti_v1.1.pdf
* Engineers Without Borders (Sheffield, UK) http://hexayurt.blip.tv/file/5012769/ + text being written at http://piratepad.net/jYVkXNdy3n


= Video and PDF =
If the panels are from wood, then:
* the connectors need to be stronger than with lighter panels.
* fixing the hexayurt to the ground is probably needed only if there's risk of earthquakes or landslides.
* water-proofing and insect-proofing need to be considered, asking the local experts.
* portability will need a group of synchronised carriers.


* [http://blip.tv/play/AYGf3CMC Video (English)]
=== Modifications ===
* [http://www.appropedia.org/images/3/39/Plywood_Hexayurt_Construction_Details.PDF Construction details]
* Screwing directly into plywood is not recommended and due the angles involved it is sometimes impossible. Therefore all joints are made using wooden blocks.
* [http://www.overstream.net/view.php?oid=uzu8epmcasi5 Video (Spanish subtitles)]
* The two side of the roof triangles overlap so that they may be screwed together. Also the roof panels are lapped so that they sit on top of one of the neighbouring pieces but under the other.  
* Because of these overlaps the tips of the triangle must be cut.
* This overlap in the roof causes the roof’s foot print to be smaller than in the basic design. Also, to water to run off the roof properly, the roof must overhang.  So the walls must be connected into a smaller hexagon to be within the radius of the roof. This is achieved by letting one wall protrude when making the joint.
* To prevent the roof clashing with the protruding wall one corner of the wall sheet is cut. This modification is called the “Sri Lankan corner”.


Another video, with some construction details: http://www.youtube.com/watch?v=-fwlIxWomyw
== How to ==
If unclear refer to the Sketchup model or videos in the links section.


= EWB Sheffield's script =
=== Requirements ===


The video is at http://hexayurt.blip.tv/file/5012769/ and the following is not meant to be a literal transcription, but a how-to text that's useful for builders. So the emphasis is not on literal but on clear, precise and concise sentences.
==== People ====


We should add metric to imperial measurement units, and maybe even euros, while we're at it. ;-)
2 all constructions stages except ‘Stage 4: lifting the roof’


This text will be ported to http://www.universalsubtitles.org so that it will become subtitles in English (for those who have trouble hearing or understanding that language, or who simply prefer to read-and-watch rather than listen-and-watch), and the basis for translated subtitles into as many languages as we cooperatively can (probably starting with Spanish, and aiming at 5 and then 40, BHAG).
≈18 for Stage 3: lifting the roof. Number depends on strength of the people and material used. Plywood is approximately 40kg a sheet and OSB is 20kg a sheet. So the roof can weigh 240kg or 120kg. You want a maximum of 15-20kg per person.  Lasts roughly 5 minutes


'''Engineers Without Borders Sheffield'''
==== Materials ====
'''Plywood Hexayurt How-to Video'''


Having 6 sides it's hard to get a sense of how big the hexayurt is.
Required:
Our eyes are used to 4-sided buildings.
Could I ask you a favour? Could you walk around the hexayurt? Thank you!
We have some camping mats inside to give a sense of scale.
How is that with 5 occupants?  Very big!
Very big for camping, not for living.  With possessions.
Fairly standard for 4 1/2 persons. One person for each wall.
Central shared space. For cooking. Stove in the center with the smoke going up.
In cold climates you'd put a layer of insulation on the inside.  Stapled, probably.


'''Parts List'''
12× 1.22m×2.44m sheets of 12mm thick plywood or similar material e.g OSB, strawboard
'''All you'll need for $100 USD'''


'''12 sheets of OSB or Plywood'''
6× 47mm×100mm lengths of 2m long carcassing timber or similar. This is approximately 2inches by 4 inches so please note that a lot of lumber called as “2 by 4” DO NOT actually measure 2”×4” for historical reasons.
'''6 for the walls, 6 for the roof'''


Check that the boards are 1.2 by 2.4, because sometimes they are 1.2 by 2.5.
220+ 50mm long self tapping woodscrews. Preferably flange head with partially unthreaded shank
Mark the diagonal.


'''(5) pieces of 2x4 8' lumber'''
Optional:
'''for (24) 120º and (12) 120º blocks'''


Template for the 150º block, using a pair of cutters as a compass.
1-2× Tarpaulin for floor and to cover the roof
150º = 60º + 60º + half of 60º.
Accurate enough. If there's some error it will be smaller than the error when using the saw.


'''(200) 2" deck screws'''
1-2× Bottle of Foaming Woodglue
'''self-taping if possible'''


Walls first. I'm liking your door, looks like two eyes and a nose.
==== Tools ====
That was not the plan; port-holes was the idea.
We love the arch.  No meassuring, just using a piece of string and a pen.


This is the profile of a block. Takes more cutting but uses less wood.
Recommended:
This is the sholanken corner I mentioned before. 6" by 6" and cut the triangle off.
So that the wall radius comes inside of the roof radius.
One block at the top and one block at the bottom.
A pile of spare blocks to hold the roof on.


These are the roof triangles.
• Pen/pencil
You screw one block on the inside of each one.
They overlap by the thickness of one block. If the block is 2" by 4", it's 1.75 inches ???.


[5:24] They all have to be oriented in the same way in terms of left over right or right over left.
• Electric screw driver


Once you have the roofs done we're going to do an awkward bit of cutting.
• Circular saw


'''Trimming fo the roof triangles'''
• Handsaw
'''(an awkward little detail)'''


[5:51][not literal]
• Protractor (angle measurer)
We need the boards to overlap on each other at the very top of the hexayurt.
So the narrowest angle of each half-panel piece has to be cut twice:
* First at the very end, to make it shorter.
* Then parallel to the edge of the other board, to make it narrower.


'''How the roof works (and the awkward detail explained)'''
• Power source


[7:34] This is how the roof pieces will go.
• String


Actually this is over like that. See how they catch?
• Tape measure
You take those corners in.
Screw the wooden blocks in the inside.


[8:19] That's the overlap of the pieces, where each roof piece rests in the one besides it. That's what forms your roof strength. Each on over the one before.
• Tent pegs x 6 (or other way to mark the ground)


'''Placing the 150º roof blocks'''
=== Construction ===


Roughly at half height, you measure the thickness of the block. and then you can screw it in a position like this.
Note: Always screw from the plywood into the block
Use 2 screws are needed for each block face that meets a board.


So the other piece of the roof wedges right into that corner. Screw from the outside, this edge parallel to that edge.
==== Stage 1: Walls ====


[9:45] And then the other board will slide up against that and into place.
Mark out a hexagon. First use the string to mark out a circle with a radius of 2.2m. Once the circle is drawn, mark one spot on the edge, put one end of the string there, and mark where the other end of the rope crosses the circle. Now start from that point, and mark the next crossing point. Continue all the way around to make the hexagon. Alternatively, hold the string in the middle and mark every 60°.


'''About to finish the roof'''
Take 6 panels


It's clearly not quite a house, but it's definitly better than a tent. The thing is if it was four times the price of a tent it really wouldn't be worth doing it. But at a quarter of the price of a tent it's actually quite a technology.
Cut off one 25cm corner of each panel. This is called the "Sri Lankan corner" because it was invented in Sri Lanka.


Did I hear some body just discovered the problem of the end?  Some one's got to go inside, that is correct. Actually for safety reasons it's actually it's best for about 4 or 5 people inside so the roof can not fall on them.
Cut a door and window(s) in one of the panels.


'''Placing the last two roof blocks'''
Cut 24 blocks at an angle of 120º angle. 18 are used for the walls. Safe the other 6 for later. There will be 3 blocks in each corner, one near the ground, one near the middle and the other near the roof.


[10:33] So for these two blocks you have to align it, so that the surface of the block aligns up smoothly with the roof. It's the opposite of insetting on that side: on one side you ???
Screw the blocks to join the walls together. The walls are not joined edge to edge, imagine a straight line down from the end of the "Sri Lankan Corner" and use this as the edge


And that way you can screw from the outside.
Line up the corners to the hexagon you marked out.


>>>>>>>>> I don't understand it (yet) <<<<<<<<<<<<
==== Stage 2: Roof ====


'''The tricky last roof triangle'''
Take 6 panels.
'''and lifting the roof on to the walls!'''


Let's drop this solar light in here. Solar panels on the back, light on the front. Now you can see what you're doing.
Cut each of them in half through the diagonal.
Note: Some materials have a water resistance coating on one side. If so you will want to make two piles of 3 cut each pile along different diagonals for each pile


Does it have a disco mode?
Trim off the point of each of the 12 triangles. First measure 15cm from the tip along the medium length side of the triangle and cut it straight off. Then measure 10cm further along the same side and cut from that point to the middle of the new tip.


Final piece: you have to slide it in on one side, gentlyIt's a job for hand power, not for leg power; it's a precision operationSlide it in!  There you go, easy.
Use 2 triangles to create each of the 6 roof-piecesThis is done by overlapping 2 triangles by the width of a block (roughly 50mm)Use 2 blocks.


Now you need to move it up, push it up some. (That side will go over rather than under, but don't worry about that side yet.) Close enough!
Cut 12 blocks at an angle of 150º angle. There will be 2 blocks in each corner, roughly 60cm away from the the ends.


Who's going to do the screws?  There's someone pressing on the other side?  Solid, nicely done!
Join the roof pieces with the 150º blocks. Make sure that they are lapped properly. The to piece should protrude by 50mm.
Use the center of the roof as guidance to how far up or down the individual roof modules should be slided before your screw in the screws.


Who's going to take a shot at the one up here?  You're pretty light.  More people, more people!
==== Stage 3: Lifting the Roof ====


Can you guys inside lift the roof up a tiny bit, a few inches?  Right!
Split into three groups.


Now we do the same thing again. Beautiful!
Have ¼ of the people inside the hexagon waiting at the wall nearest the roof cone (Group 1)
Have ¼ line up at the faces near at hexagon (Group 2)
Have the rest spread themselves evenly around the roof cone (Group 3).


Now the magic:
Group 2 and 3 lift and reposition the roof cone so that a corner of the wall is directly facing a corner of the roof.  
* 3 people on every wall.  You're each going to be lifting 10-15 pounds of weight because there are so many, so it's a very gentle lift, ok?
* Everybody inside gets ready too.  We're going to lift it up but we're not going to move around any. Ready? Lift slowly and gently.
* Lift further so it's easier.  Once you're at shoulder height it weighs less.
* Everybody who is free go inside.
* Very slowly begin to walk towards the hexayurt. Then pass the weight to the people inside. Then run down the other side of the building because you're going to take it when it comes at the back.
* Now we need more people on the outside. Lower very gently. Keep it aligned with the corners, mind your fingers.


Now we're going to add more screws to hold down the roof properly, but that's the process.
They then carry the roof toward the hexagon slowly.
When near the wall, allow Group 2 to pass the load onto Group 1 and then move out of the way.
Group 2 then moves around to the side with the door ready to receive the load again.  


'''Placing the mid-wall roof-blocks'''
Lower the roof into place and secure with the leftover blocks from Stage 1. Add additional screws at the corners, through the roof and into the top wall blocks.


[18:51] This is a 120º block and it goes right under the section where the two pieces of the roof cross.  You need to hold the block from below so that it's screwed tight.


Then from the inside you put in another screw, and that locks it into the roof.
== Variants ==


'''First footing!'''
=== Haiti/Hurricane Hexayurt ===
'''(it's a Scottish thing)'''
A plywood hexayurt with reinforced corners and anchoring to the ground for high wind conditions.


[20:08] I can even put my hands up! Quite spacious. Thanks very much!
=== [[Hexayurt_H13_Plywood|Plywood H13]]  ===
The plywood version of Scott Davis and Dylan Toymaker's [[Hexayurt H13|H13]] design. Using one more sheet of plywood and switching the arrangementof the roof panels results in a structure with a full 8′ entry-way, much more interior walkable space SUP PEPLZZZZZ!!!!!!!!!!!!!


'''20 people inside and'''
== Additional details ==
'''some additional notes'''


[20:34] For Burning Man people typically have so much equipement with them that they have to carry stuff on a truck.
==== Finer Points ====


How many people do we have in here now? 17 and we have some space in the middle. 19. Come on in, it's a hexayurt, not a clown-car.
===== Corner Block =====


A tonne of shelter for not much money.
When screwing the block at the edges with an overlap, Screw the block to the sheet that is at the edge first. Leave about 1cm between the corner of the block and the edge of the sheet. Then screw the other sheet in place. this will "pull" the sheets tighter than if done the other way.


You don't have to build them out of wood. You can use corrugated plastic, and if you work with corrugated plastic and tape it can be folding.
==== Temporary Measures ====
OR NAHHHHHHH
===== Door =====


Hexayurt experience. Half the price of a relief tent, lasts 3 times as long, about the same size. 5 years, maybe 10? It's on every continent, now; test units only, though. Antartica?  If you use a nice thick insulated panel, why not?
Screw four blocks near the corners of the door so that they overhang a little bit and give a lip for the door to rest on
On the inner side screw two block around the middle. Secure one side with two screws. For the other side use only one screw, position he block and the screw so that dependent on the orientation the block it will either hold the door in place or allow it out. This will allow the door to “locked” from the inside until more permanent measures are in place Add a last block to the door as a handle.
Diagrams pending


Mongolian yurts.  Every culture has a shack or a hut which is about this size, to live in.  The English had benders.
==== Tricks for limited tools ====


'''Gang carrying the finished hexayurt'''
===== Measuring angles =====
'''and the relocatable building idea'''
Take a sheet of paper, fold it in half and then half again. Now fold in a ‘Z’ it into thirds. Unfold and you now have a sheet that can be used to measure any multiple of 30°. 


[22:57] We need 18 folks all the way around. Don't lift before we have 3 on each side.  For the people who are at the corners, hold by the corners; everybody else hold by the middle.


We're going to go to that no-fire sign, see it?  That's 5 feet.  So at the count of 3, lift very slowly - 1, 2, 3 - and walk about 5 feet towards the no-fire sign. So this is the relocatable building thing. And stop, and down.  Clap!  Good!


So what you do is you screw some aditional bits of wood to it, to make it a frame to carry it by. Then you get 20 people to carry it on their shoulders and you just walk somebody's house to where they are going to live in next.
== Links ==


And that means you can build semipermanent structures that you can still relocate if you've got to move your camps.  For example in Haiti you could build hexayurts and if you have to relocate 5 miles to a new centre, you can do it.  It's a slow process but you have time and lots of manual labour on hand.
'''These links need to be sorted''' [[User:LucasG|LucasG]] 14:54, 14 April 2011 (PDT)
 
* 3d sketchup by [https://twitter.com/#!/jumplogic/status/115051646190485504/photo/1 Al Razi Masri] [http://sketchup.google.com/3dwarehouse/details?mid=ab1e2b545e05ba6919cdfa1d5f3e3e8a&result=4 here].
Thank you!
* Haiti http://vinay.howtolivewiki.com/blog/other/the-hexayurt-in-haiti-a-technical-description-1678 and http://files.howtolivewiki.com/hexayurt_in_haiti_v1.1.pdf
 
* Engineers Without Borders (Sheffield, UK) video shows the entire construction process https://www.youtube.com/watch?v=xLdP6Wsv0bQ and text at http://piratepad.net/jYVkXNdy3n
'''Back to parts'''
* [http://blip.tv/play/AYGf3CMC Video (English)]
 
* [http://www.appropedia.org/images/3/39/Plywood_Hexayurt_Construction_Details.PDF Construction details]
[24:41] This is just running it backwards. Beautiful work. Nice!
* [http://www.overstream.net/view.php?oid=uzu8epmcasi5 Video (Spanish subtitles)]
 
* Another video, with some construction details: http://www.youtube.com/watch?v=-fwlIxWomyw
= A written step-by-step how-to =
* Finished, lived in, insulated OSB hexayurt with a wood frame construction. http://yurtbuilder.blogspot.co.uk/2014/07/osb-hexayurt.html
 
You need:
* 12 plywood or OSB panels. Each is 4-foot by 8 foot, 0.5 inch thick.
* 4 2 inch by 4 inch.
* A tool to cut the wood with.
* Screws and something to screw them with.
 
Prepare the pieces:
* Cut off the final 4 inches of 6 panels.  These will be the walls.
* Cut the remaining 6 panels in half, diagonally.  You're left with 12 triangles.
* Trim off the narrowest corner of the triangles. Explained at 5min51 of the Engineers Without Borders (Sheffield, UK) video.
* Cut (number needed) blocks from the 2x4, (some number) in 120 degree angles and (some number) in 150 angles.
 
Build the walls:
* Have a team put the pieces in place and use the 120-degree (or is it 150-degrees?) blocks to join them together.
 
Build the roof:
* ...
 
Mount the roof:
* Is it better to mount the roof pieces as you build the roof?
* ...
 
Anything else from here?
* Make it waterproof.
* Screw to other hexayurts to make the whole group better resistent to hurricanes?  Or maybe put sand sacks around each hexayurt?  Or both?
 
Are there alternatives and extensions to all this?
* Better ways to join the walls?
* Better ways to mount the roof?
* Better ways to make this water-proof?
* Better ways to make them hurricane resistant?
* Is earthquake resistance an issue with these light structures?
* Could stuff be added to hexayurts?
* At the end of a hexaurt's life-cycle, panels can be reused, or they can be used as fuel for (good) stoves.  What's the best way to cut them into appropriate-size pieces?
* ...
 
= How you can help =
 
== Tell others ==
 
Simple!
 
== Translate into other languages ==
 
'''Looking into dotsub.com which btw is what ted.com uses.  The srt is useable anyway, and the video is public domain, if you want to give it a try.  I'll have a go at it within the next 24 hours, not sure when.'''
 
If you want to translate this video into other languages, help yourself to the subtitles you prefer (either English or Spanish):
* You should copy that to a plain text file and give it a ".srt" extension.
* Use that file as a starting point for your translation.  You only need to translate, because the timing is already there for you.  Saves a lot of work!
* Then create an account in overstream.net or other video-hosting place, and import the .srt file.  (Or I can do it for you as time allows.)
* Then add the link to your translation above, so that we'll know it's done.
* It would also be good if you could leave your new .srt file below.  This helps yet other translators, and maybe people can improve yours if they spot mistakes!
 
Automatic translation tools:
* The language would have to be simplified.  Automatic translators don't do a good job with broken sentences!  And simplifying the language means we have a better how-to anyway, so let's do that (see above).
* Some say two tools could be used, so that they will check each other out.
* It's best if humans can do the job!
* That said: http://www.microsofttranslator.com/ + any other tool that you know of?
 
== Help fix translations ==
 
The English transcription is not perfect:
* In the final third of the video, the timing is not perfect and there are words I (LucasG) can't hear too well.
* Also, the English is translated back from the Spanish (reverse engineered so to speak), so it's not exacly as the original.
 
If you can help, I'd appreciate it.  Write your comments on this page.  Thank you!
 
= Translations (.SRT files) =
 
== English ==
1
00:00:00,000 --> 00:00:02,378
http://www.appropedia.org/Hexayurt_Plywood has file to help other translators, or leave comments there!
 
2
00:00:03,121 --> 00:00:08,713
This is the Hexayurt that we built at the Engineers Without Borders annual gathering and Practical Action camp.
 
2
00:00:09,682 --> 00:00:14,625
Here you see the details of construction of a plywood hexayurt.
 
3
00:00:14,625 --> 00:00:23,353
It's a 150 degrees angle cut in a piece of 2 x 4 and screwed from the outside.
 
4
00:00:23,453 --> 00:00:33,262
Here's the other size of block which we use, look down here, it's 120 degrees.  It holds walls together.
 
5
00:00:33,726 --> 00:00:46,757
And let's go outside.  Outside there's a 120 degrees block which joins the wall with the roof.
 
6
00:00:46,787 --> 00:00:49,787
And there are 150 blocks which join the roof pieces together.
 
7
00:00:50,329 --> 00:00:59,157
And outside you can see who pieces overlap.  Can you see the overlapping?
 
8
00:00:59,157 --> 00:01:06,956
Overlapping means we use a screw through two layers of plywood and into the block.
 
9
00:01:07,081 --> 00:01:08,249
So we overlap the edges.
 
10
00:01:08,243 --> 00:01:11,243
And we overlap this edge too.
 
11
00:01:11,352 --> 00:01:14,352
This is far from being a perfect way to make it waterproof.
 
12
00:01:14,496 --> 00:01:18,266
But you can do it without adding any additional component or adding any deep complexity to the system.
 
13
00:01:18,340 --> 00:01:23,401
For this to work we must cut the wall pieces a bit shorter than we would do normally.
 
14
00:01:23,756 --> 00:01:26,756
So these instead of being 8 foot long are cut to 7 feet and 4 inches,
 
15
00:01:27,176 --> 00:01:33,092
which gives you additional space needed to make sure the roof is underneath (?) the wall
 
16
00:01:33,593 --> 00:01:39,996
you make this with 12 OSB panels and 4 pieces of 4x8 (I think it's 2x4) and a bunch of screws
 
17
00:01:40,945 --> 00:01:42,743
back inside
 
18
00:01:43,282 --> 00:01:46,282
see what I mean ... (...) ...
 
19
00:01:48,607 --> 00:01:51,607
just at the top there's a detail
 
20
00:01:53,303 --> 00:01:58,245
see how we trimmed the pieces to make a hole
 
21
00:01:58,658 --> 00:02:05,797
see this angle here? we simply trimmed a small piece off the side of the plywood, from one side and from the other so they fit together to (...)
 
22
00:02:06,521 --> 00:02:09,521
so each piece of plywood ...
 
23
00:02:10,145 --> 00:02:13,145
overlaps over the next on and then we trim them so they fit together this way
 
24
00:02:13,404 --> 00:02:16,404
it's a bit tricky and we'd like to do a (...) properly later
 
25
00:02:16,721 --> 00:02:19,721
but this is the basics of a plywood hexayurt
 
26
00:02:22,653 --> 00:02:25,653
thank you
 
27
00:02:26,307 --> 00:02:29,307
i hope you can figure out the details on your own
 
28
00:02:30,936 --> 00:02:33,936
150 to hold the roof
 
29
00:02:34,052 --> 00:02:37,052
120 to join the wall to the roof
 
30
00:02:37,178 --> 00:02:44,647
you can see the screws that go through the roof and go into those blocks (...)
 
31
00:02:44,647 --> 00:02:46,904
and that's all there is to it
 
32
00:02:47,017 --> 00:02:48,606
the walls are full panels with 6 inches cut off one side
 
33
00:02:48,732 --> 00:02:50,928
the pieces for the roof are half a panel, overlapped
 
34
00:02:51,463 --> 00:02:53,587
an that's the plywood hexayurt
 
35
00:02:53,720 --> 00:02:54,804
hexayurt.com
 
== Spanish ==
1
00:00:00,000 --> 00:00:02,378
http://www.appropedia.org/Hexayurt_Plywood has file to help other translators, or leave comments there!
 
2
00:00:03,121 --> 00:00:08,713
Este es el Hexayurt que construimos en la reunión anual de Ingenieros Sin Fronteras y campamento de Acción Práctica.
 
3
00:00:09,682 --> 00:00:14,625
Aquí ves los detalles de la construcción de un Hexayurt de conglomerado.
 
4
00:00:14,625 --> 00:00:23,353
Es un ángulo de 150 grados cortado en una pieza de 2x4 pulgadas y atornillado desde fuera.
 
5
00:00:23,453 --> 00:00:33,262
Aquí está el otro tamaño de bloque que usamos, mira ahí abajo, de 120 grados, que sostiene unas paredes con otras.
 
6
00:00:33,726 --> 00:00:46,757
Y vamos fuera. Fuera hay un bloque de 120 grados que une la pared con el techo.
 
7
00:00:46,787 --> 00:00:49,787
Y hay piezas de 150 grados que unen las piezas del techo entre sí.
 
8
00:00:50,329 --> 00:00:59,157
Y por fuera puedes ver cómo las tablas se superponen unas con otras. ¿Puedes ver la superposición?
 
9
00:00:59,157 --> 00:01:06,956
La superposición significa que ponemos un tornillo a través de dos capas de conglomerado, directamente hasta el bloque.
 
10
00:01:07,081 --> 00:01:08,249
Así que superponemos los bordes.
 
11
00:01:08,243 --> 00:01:11,243
Y superponemos este borde también.
 
12
00:01:11,352 --> 00:01:14,352
Esto está lejos de ser una manera perfecta de lograr que sea estanco al agua.
 
13
00:01:14,496 --> 00:01:18,266
Pero ocurre que puedes hacerlo sin añadir ningún componente adicional ni añadir ninguna complejidad profunda al sistema.
 
14
00:01:18,340 --> 00:01:23,401
Para que funcione, tienes que cortar las piezas de las paredes un poco más cortas que como las cortarías normalmente,
 
15
00:01:23,756 --> 00:01:26,756
así que éstas en lugar de tener 8 pies de largo, tienen 7 pies y 4 pulgadas,
 
 
16
00:01:27,176 --> 00:01:33,092
y eso te da el espacio adicional que necesitas para asegurarte de que el techo está por debajo [?] de la pared
 
17
00:01:33,593 --> 00:01:39,996
fabricas esto con 12 piezas de OSB y 4 piezas de 4x8 y un puñado de tornillos
 
18
00:01:40,945 --> 00:01:42,743
volvemos al interior
 
19
00:01:43,282 --> 00:01:46,282
mira lo que quiero decir ... [...] ...
 
20
00:01:48,607 --> 00:01:51,607
justo en la parte más alta hay un detalle
 
21
00:01:53,303 --> 00:01:58,245
mira cómo hemos recortado las piezas para hacer un agujero
 
22
00:01:58,658 --> 00:02:05,797
¿ves este ángulo de aquí? simplemente cortamos una pequeña pieza del borde del tablón, de un lado y del otro,
de manera que encajan uno con otro para [...]
 
23
00:02:06,521 --> 00:02:09,521
así que cada pieza de madera ...
 
24
00:02:10,145 --> 00:02:13,145
cruzas cada pieza de madera sobre la otra y luego las recortas para que encajen una con la otra de esta manera
 
25
00:02:13,404 --> 00:02:16,404
tiene un poco de truco y pensamos hacer un [...] bien hecho más tarde
 
26
00:02:16,721 --> 00:02:19,721
pero eso es lo básico de un hexayurt de conglomerado
 
27
00:02:22,653 --> 00:02:25,653
gracias
 
28
00:02:26,307 --> 00:02:29,307
espero que puedas "figure out" los detalles por tu cuenta
 
29
00:02:30,936 --> 00:02:33,936
los de 150 sostienen el techo
 
30
00:02:34,052 --> 00:02:37,052
los de 120 unen la pared al techo
 
31
00:02:37,178 --> 00:02:44,647
puedes ver los tornillos que atraviesan el techo y se meten en esos bloques [...]
 
32
00:02:44,647 --> 00:02:46,904
y eso es todo lo que hay
 
33
00:02:47,017 --> 00:02:48,606
las paredes son paneles completos con 6 pulgadas recortadas de un lado
 
34
00:02:48,732 --> 00:02:50,928
las piezas del techo son medio panel superpuestas
 
35
00:02:51,463 --> 00:02:53,587
y ese es el hexayurt de conglomerado
 
36
00:02:53,720 --> 00:02:54,804
hexayurt.com

Revision as of 14:58, 14 September 2018


There's a substantial amount of text at the discussion page. It will be restored gradually as soon as the outline is clear. Use it now if you wish. LucasG 07:49, 24 July 2011 (PDT)

Plywood hexayurt is the catch-all term being used for the family of frameless hexayurts constructed out of plywood or similar materials. The most notable alternative is OSB. They are not to be confused with the Timber Frame Hexayurt. Plywood Hexayurts lack any form internal framing.

Hexayurt made from OSB at Small is Festival 2010.
OSB Hexayurt.

Plywood

Sketch up models of Plywood Hexayurt.
Sketch up models of Plywood Hexayurt showing modifications.

This is the primary hexayurt solution for disaster relief situations due to the materials used and ease of constructions. For disasters in extreme cold, use isulation board and the construction instruction in Hexayurt Playa

Hexayurts are basically made of panels and connectors. The design has been modified extensively because of issues that arise from constructing out of plywood with no frame. The concerns of Water-proofing, insect-proofing, fixing to the ground and portability are different from that of the more common polyiso hexayurt.

If the panels are from wood, then:

  • the connectors need to be stronger than with lighter panels.
  • fixing the hexayurt to the ground is probably needed only if there's risk of earthquakes or landslides.
  • water-proofing and insect-proofing need to be considered, asking the local experts.
  • portability will need a group of synchronised carriers.

Modifications

  • Screwing directly into plywood is not recommended and due the angles involved it is sometimes impossible. Therefore all joints are made using wooden blocks.
  • The two side of the roof triangles overlap so that they may be screwed together. Also the roof panels are lapped so that they sit on top of one of the neighbouring pieces but under the other.
  • Because of these overlaps the tips of the triangle must be cut.
  • This overlap in the roof causes the roof’s foot print to be smaller than in the basic design. Also, to water to run off the roof properly, the roof must overhang. So the walls must be connected into a smaller hexagon to be within the radius of the roof. This is achieved by letting one wall protrude when making the joint.
  • To prevent the roof clashing with the protruding wall one corner of the wall sheet is cut. This modification is called the “Sri Lankan corner”.

How to

If unclear refer to the Sketchup model or videos in the links section.

Requirements

People

2 all constructions stages except ‘Stage 4: lifting the roof’

≈18 for Stage 3: lifting the roof. Number depends on strength of the people and material used. Plywood is approximately 40kg a sheet and OSB is 20kg a sheet. So the roof can weigh 240kg or 120kg. You want a maximum of 15-20kg per person. Lasts roughly 5 minutes

Materials

Required:

12× 1.22m×2.44m sheets of 12mm thick plywood or similar material e.g OSB, strawboard

6× 47mm×100mm lengths of 2m long carcassing timber or similar. This is approximately 2inches by 4 inches so please note that a lot of lumber called as “2 by 4” DO NOT actually measure 2”×4” for historical reasons.

220+ 50mm long self tapping woodscrews. Preferably flange head with partially unthreaded shank

Optional:

1-2× Tarpaulin for floor and to cover the roof

1-2× Bottle of Foaming Woodglue

Tools

Recommended:

• Pen/pencil

• Electric screw driver

• Circular saw

• Handsaw

• Protractor (angle measurer)

• Power source

• String

• Tape measure

• Tent pegs x 6 (or other way to mark the ground)

Construction

Note: Always screw from the plywood into the block Use 2 screws are needed for each block face that meets a board.

Stage 1: Walls

Mark out a hexagon. First use the string to mark out a circle with a radius of 2.2m. Once the circle is drawn, mark one spot on the edge, put one end of the string there, and mark where the other end of the rope crosses the circle. Now start from that point, and mark the next crossing point. Continue all the way around to make the hexagon. Alternatively, hold the string in the middle and mark every 60°.

Take 6 panels

Cut off one 25cm corner of each panel. This is called the "Sri Lankan corner" because it was invented in Sri Lanka.

Cut a door and window(s) in one of the panels.

Cut 24 blocks at an angle of 120º angle. 18 are used for the walls. Safe the other 6 for later. There will be 3 blocks in each corner, one near the ground, one near the middle and the other near the roof.

Screw the blocks to join the walls together. The walls are not joined edge to edge, imagine a straight line down from the end of the "Sri Lankan Corner" and use this as the edge

Line up the corners to the hexagon you marked out.

Stage 2: Roof

Take 6 panels.

Cut each of them in half through the diagonal. Note: Some materials have a water resistance coating on one side. If so you will want to make two piles of 3 cut each pile along different diagonals for each pile

Trim off the point of each of the 12 triangles. First measure 15cm from the tip along the medium length side of the triangle and cut it straight off. Then measure 10cm further along the same side and cut from that point to the middle of the new tip.

Use 2 triangles to create each of the 6 roof-pieces. This is done by overlapping 2 triangles by the width of a block (roughly 50mm). Use 2 blocks.

Cut 12 blocks at an angle of 150º angle. There will be 2 blocks in each corner, roughly 60cm away from the the ends.

Join the roof pieces with the 150º blocks. Make sure that they are lapped properly. The to piece should protrude by 50mm. Use the center of the roof as guidance to how far up or down the individual roof modules should be slided before your screw in the screws.

Stage 3: Lifting the Roof

Split into three groups.

Have ¼ of the people inside the hexagon waiting at the wall nearest the roof cone (Group 1) Have ¼ line up at the faces near at hexagon (Group 2) Have the rest spread themselves evenly around the roof cone (Group 3).

Group 2 and 3 lift and reposition the roof cone so that a corner of the wall is directly facing a corner of the roof.

They then carry the roof toward the hexagon slowly. When near the wall, allow Group 2 to pass the load onto Group 1 and then move out of the way. Group 2 then moves around to the side with the door ready to receive the load again.

Lower the roof into place and secure with the leftover blocks from Stage 1. Add additional screws at the corners, through the roof and into the top wall blocks.


Variants

Haiti/Hurricane Hexayurt

A plywood hexayurt with reinforced corners and anchoring to the ground for high wind conditions.

Plywood H13

The plywood version of Scott Davis and Dylan Toymaker's H13 design. Using one more sheet of plywood and switching the arrangementof the roof panels results in a structure with a full 8′ entry-way, much more interior walkable space SUP PEPLZZZZZ!!!!!!!!!!!!!

Additional details

Finer Points

Corner Block

When screwing the block at the edges with an overlap, Screw the block to the sheet that is at the edge first. Leave about 1cm between the corner of the block and the edge of the sheet. Then screw the other sheet in place. this will "pull" the sheets tighter than if done the other way.

Temporary Measures

OR NAHHHHHHH

Door

Screw four blocks near the corners of the door so that they overhang a little bit and give a lip for the door to rest on On the inner side screw two block around the middle. Secure one side with two screws. For the other side use only one screw, position he block and the screw so that dependent on the orientation the block it will either hold the door in place or allow it out. This will allow the door to “locked” from the inside until more permanent measures are in place Add a last block to the door as a handle. Diagrams pending

Tricks for limited tools

Measuring angles

Take a sheet of paper, fold it in half and then half again. Now fold in a ‘Z’ it into thirds. Unfold and you now have a sheet that can be used to measure any multiple of 30°.


Links

These links need to be sorted LucasG 14:54, 14 April 2011 (PDT)

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