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* [http://blip.tv/play/AYGf3CMC Video (English)]
[[Category:Hexayurt project]]
* [http://www.appropedia.org/images/3/39/Plywood_Hexayurt_Construction_Details.PDF Construction details]
 
* [http://www.overstream.net/view.php?oid=uzu8epmcasi5 Video (Spanish subtitles)]
'''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)
 
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.
[[File:Osb_hexayurt.jpg|thumb|upright=3|alt=Hexayurt made from OSB at Small is Festival 2010.|OSB Hexayurt.]]
 
== Plywood ==
 
[[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]]  
 
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 ===


<embed src="http://blip.tv/play/AYGf3CMC" type="application/x-shockwave-flash" width="480" height="390" allowscriptaccess="always" allowfullscreen="true"></embed> ((I don't know how to embed video in mediawiki, help appreciated))
Note: Always screw from the plywood into the block
Use 2 screws are needed for each block face that meets a board.


Subtitles (.srt file - grab and translate into other languages!)
==== Stage 1: Walls ====


1
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°.
00:00:00,000 --> 00:00:08,713
Este es el Hexayurt que construimos en la reunión anual de Ingenieros Sin Fronteras y campamento de Acción Práctica.


2
Take 6 panels
00:00:09,682 --> 00:00:14,625
Aquí ves los detalles de la construcción de un Hexayurt de conglomerado.


3
Cut off one 25cm corner of each panel.  This is called the "Sri Lankan corner" because it was invented in Sri Lanka.
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.


4
Cut a door and window(s) in one of the panels.
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.


5
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.
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.


6
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
00:00:46,787 --> 00:00:49,787
Y hay piezas de 150 grados que unen las piezas del techo entre sí.


7
Line up the corners to the hexagon you marked out.
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?


8
==== Stage 2: Roof ====
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.


9
Take 6 panels.
00:01:07,081 --> 00:01:08,249
Así que superponemos los bordes.


10
Cut each of them in half through the diagonal.
00:01:08,243 --> 00:01:11,243
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
Y superponemos este borde también.


11
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.
00:01:11,352 --> 00:01:14,352
Esto está lejos de ser una manera perfecta de lograr que sea estanco al agua.


12
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.
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.


13
Cut 12 blocks at an angle of 150º angle.  There will be 2 blocks in each corner, roughly 60cm away from the the ends.
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,


14
Join the roof pieces with the 150º blocks. Make sure that they are lapped properly. The to piece should protrude by 50mm.
00:01:23,756 --> 00:01:26,756
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.
así que éstas en lugar de tener 8 pies de largo, tienen 7 pies y 4 pulgadas,


==== Stage 3: Lifting the Roof ====


15
Split into three groups.
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


16
Have ¼ of the people inside the hexagon waiting at the wall nearest the roof cone (Group 1)
00:01:33,593 --> 00:01:39,996
Have ¼ line up at the faces near at hexagon (Group 2)
fabricas esto con 12 piezas de OSB y 4 piezas de 4x8 y un puñado de tornillos
Have the rest spread themselves evenly around the roof cone (Group 3).


17
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.
00:01:40,945 --> 00:01:42,743
volvemos al interior


18
They then carry the roof toward the hexagon slowly.
00:01:43,282 --> 00:01:46,282
When near the wall, allow Group 2 to pass the load onto Group 1 and then move out of the way.
mira lo que quiero decir ... [...] ...
Group 2 then moves around to the side with the door ready to receive the load again.  


19
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.
00:01:48,607 --> 00:01:51,607
justo en la parte más alta hay un detalle


20
00:01:53,303 --> 00:01:58,245
mira cómo hemos recortado las piezas para hacer un agujero


21
== Variants ==
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 [...]


22
=== Haiti/Hurricane Hexayurt ===
00:02:06,521 --> 00:02:09,521
A plywood hexayurt with reinforced corners and anchoring to the ground for high wind conditions.  
así que cada pieza de madera ...


23
=== [[Hexayurt_H13_Plywood|Plywood H13]]  ===
00:02:10,145 --> 00:02:13,145
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!!!!!!!!!!!!!
cruzas cada pieza de madera sobre la otra y luego las recortas para que encajen una con la otra de esta manera


24
== Additional details ==
00:02:13,404 --> 00:02:16,404
tiene un poco de truco y pensamos hacer un [...] bien hecho más tarde


25
==== Finer Points ====
00:02:16,721 --> 00:02:19,721
pero eso es lo básico de un hexayurt de conglomerado


26
===== Corner Block =====
00:02:22,653 --> 00:02:25,653
gracias


27
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.
00:02:26,307 --> 00:02:29,307
espero que puedas "figure out" los detalles por tu cuenta


28
==== Temporary Measures ====
00:02:30,936 --> 00:02:33,936
OR NAHHHHHHH
los de 150 sostienen el techo
===== Door =====


29
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
00:02:34,052 --> 00:02:37,052
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.
los de 120 unen la pared al techo
Diagrams pending


30
==== Tricks for limited tools ====
00:02:37,178 --> 00:02:44,647
puedes ver los tornillos que atraviesan el techo y se meten en esos bloques [...]


31
===== Measuring angles =====
00:02:44,647 --> 00:02:46,904
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°. 
y eso es todo lo que hay


32
00:02:47,017 --> 00:02:48,606
las paredes son paneles completos con 6 pulgadas recortadas de un lado


33
00:02:48,732 --> 00:02:50,928
las piezas del techo son medio panel superpuestas


34
== Links ==
00:02:51,463 --> 00:02:53,587
y ese es el hexayurt de conglomerado


35
'''These links need to be sorted''' [[User:LucasG|LucasG]] 14:54, 14 April 2011 (PDT)
00:02:53,720 --> 00:02:54,804
* 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].
hexayurt.com
* 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
* [http://blip.tv/play/AYGf3CMC Video (English)]
* [http://www.appropedia.org/images/3/39/Plywood_Hexayurt_Construction_Details.PDF Construction details]
* [http://www.overstream.net/view.php?oid=uzu8epmcasi5 Video (Spanish subtitles)]
* Another video, with some construction details: http://www.youtube.com/watch?v=-fwlIxWomyw
* Finished, lived in, insulated OSB hexayurt with a wood frame construction. http://yurtbuilder.blogspot.co.uk/2014/07/osb-hexayurt.html

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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