1 00:00:00,008 --> 00:00:00,985 Engineers Without Borders Sheffield 2 00:00:00,985 --> 00:00:02,154 Plywood Hexayurt How-to Video 3 00:00:02,154 --> 00:00:11,997 Having 6 sides it's hard to get a sense of how big the hexayurt is. 4 00:00:11,997 --> 00:00:22,782 Our eyes are used to 4-sided buildings. 5 00:00:22,782 --> 00:00:41,736 Could I ask you a favour? Could you walk around the hexayurt? ... Thank you! 6 00:00:41,736 --> 00:00:51,715 We have some camping mats inside to give a sense of scale. 7 00:00:51,715 --> 00:00:56,783 How is that with 5 occupants? Very big! 8 00:00:56,783 --> 00:01:05,102 Very big for camping, not for living. 9 00:01:05,102 --> 00:01:12,970 With possessions. 10 00:01:12,970 --> 00:01:21,639 Fairly standard for 4 1/2 persons. One person for each wall. 11 00:01:21,639 --> 00:01:34,708 Central shared space. For cooking. 12 00:01:34,708 --> 00:01:46,623 Stove in the center with the smoke going up. 13 00:01:46,623 --> 00:01:59,305 In cold climates you'd put a layer of insulation on the inside. Stapled, probably. 14 00:01:59,305 --> 00:01:59,882 Parts List 15 00:01:59,897 --> 00:02:00,655 All you'll need for $100 USD 16 00:02:00,655 --> 00:02:01,878 12 sheets of OSB or Plywood 17 00:02:01,878 --> 00:02:03,170 6 for the walls, 6 for the roof 18 00:02:03,202 --> 00:02:19,330 Check that the boards are 1.2 by 2.4, because sometimes they are 1.2 by 2.5. 19 00:02:19,330 --> 00:02:38,730 Mark the diagonal. 20 00:02:38,764 --> 00:02:39,679 (5) pieces of 2x4 8' lumber 21 00:02:39,679 --> 00:02:40,802 for (24) 120º and (12) 120º blocks 22 00:02:40,808 --> 00:03:13,885 Template for the 150º block, using a pair of cutters as a compass. 23 00:03:13,885 --> 00:03:54,504 150º = 60º + 60º + half of 60º. 24 00:03:54,504 --> 00:04:04,643 Accurate enough. If there's some error it will be smaller than the error when using the saw. 25 00:04:04,647 --> 00:04:05,547 (200) 2" deck screws 26 00:04:05,547 --> 00:04:06,562 self-taping if possible 27 00:04:06,574 --> 00:04:24,641 Walls first. I'm liking your door, looks like two eyes and a nose. 28 00:04:24,641 --> 00:04:27,473 That was not the plan; port-holes was the idea. 29 00:04:27,473 --> 00:04:39,280 We love the arch. No meassuring, just using a piece of string and a pen. 30 00:04:39,280 --> 00:04:49,061 This is the profile of a block. Takes more cutting but uses less wood. 31 00:04:49,061 --> 00:04:59,450 This is the sholanken corner I mentioned before. 6" by 6" and cut the triangle off. 32 00:04:59,450 --> 00:05:02,111 So that the wall radius comes inside of the roof radius. 33 00:05:02,111 --> 00:05:06,800 One block at the top and one block at the bottom. 34 00:05:06,800 --> 00:05:09,958 A pile of spare blocks to hold the roof on. 35 00:05:09,958 --> 00:05:13,124 These are the roof triangles. 36 00:05:13,124 --> 00:05:17,149 You screw one block on the inside of each one. 37 00:05:17,149 --> 00:05:25,066 They overlap by the thickness of one block. If the block is 2" by 4", it's 1.75 inches [?]. 38 00:05:25,066 --> 00:05:44,700 They all have to be oriented in the same way in terms of left over right or right over left. 39 00:05:44,700 --> 00:05:50,807 Once you have the roofs done we're going to do an awkward bit of cutting. 40 00:05:50,807 --> 00:05:51,732 Trimming fo the roof triangles 41 00:05:51,732 --> 00:05:52,875 (an awkward little detail) 42 00:05:52,891 --> 00:06:04,304 We need the boards to overlap on each other at the very top of the hexayurt. 43 00:06:04,304 --> 00:06:11,272 So the narrowest angle of each half-panel piece has to be cut twice: 44 00:06:11,272 --> 00:06:25,910 - First at the very end, to make it shorter. 45 00:06:25,910 --> 00:06:40,901 - Then parallel to the edge of the other board, to make it narrower. 46 00:06:40,901 --> 00:06:45,385 How the roof works (and the awkward detail explained) 47 00:06:45,385 --> 00:07:39,964 This is how the roof pieces will go. 48 00:07:39,964 --> 00:07:44,702 Actually this is over like that. See how they catch? 49 00:07:44,702 --> 00:07:48,036 You tack those corners in. 50 00:07:48,036 --> 00:07:58,748 Screw the wooden blocks on the inside. 51 00:08:19,025 --> 00:08:24,386 That's the overlap of the pieces, where each roof piece rests in the one besides it. 52 00:08:24,386 --> 00:08:43,225 That's what forms your roof strength. Each on over the one before. 53 00:08:43,225 --> 00:08:45,802 Placing the 150º roof blocks 54 00:08:45,802 --> 00:09:05,390 Roughly at half height, you measure the thickness of the block, 55 00:09:05,390 --> 00:09:10,034 and then you can screw it in a position like this. 56 00:09:10,034 --> 00:09:18,742 So the other piece of the roof wedges right into that corner. 57 00:09:18,742 --> 00:09:45,694 Screw from the outside, this edge parallel to that edge. 58 00:09:45,694 --> 00:09:50,832 And then the other board will slide up against that and into place. 59 00:09:50,832 --> 00:09:52,713 About to finish the roof 60 00:09:52,713 --> 00:10:02,070 It's clearly not quite a house, but it's definitly better than a tent. 61 00:10:02,070 --> 00:10:06,180 If it was four times the price of a tent it really wouldn't be worth doing it. 62 00:10:06,180 --> 00:10:16,188 But at a quarter of the price of a tent it's actually quite a technology. 63 00:10:16,188 --> 00:10:19,903 Did I hear somebody just discovered the problem of the end? 64 00:10:19,903 --> 00:10:23,688 Someone's got to go inside, that is correct. 65 00:10:23,688 --> 00:10:27,473 Actually for safety reasons it's best for about 4 or 5 people inside 66 00:10:27,473 --> 00:10:33,231 so the roof can not fall on them. 67 00:10:33,231 --> 00:10:35,066 Placing the last two roof blocks 68 00:10:35,066 --> 00:10:50,809 The surface of the block aligns up smoothly with the roof. 69 00:10:50,809 --> 00:10:54,269 On one side you inset on the other side you outset. 70 00:10:54,269 --> 00:11:02,117 The surface of the block is aligned with this surface smoothly 71 00:11:02,117 --> 00:11:08,561 so the roof pieces fit right over them and you can screw from the outside. 72 00:11:08,561 --> 00:11:09,524 The tricky last roof triangle 73 00:11:09,526 --> 00:11:10,580 and lifting the roof on to the walls! 74 00:11:10,580 --> 00:11:13,425 Let's drop this solar light in here. 75 00:11:13,425 --> 00:11:18,975 Solar panels on the back, light on the front. 76 00:11:18,975 --> 00:11:23,874 Now you can see what you're doing. 77 00:11:23,874 --> 00:11:31,839 Does it have a disco mode? 78 00:11:31,839 --> 00:11:49,880 So we want to slide it on those blocks that come right under the other side. 79 00:11:49,880 --> 00:12:09,176 Final piece: you have to slide it in on one side, gently. 80 00:12:09,176 --> 00:12:28,681 It's a job for hand power, not for leg power. A precision operation. 81 00:12:28,681 --> 00:12:41,591 Slide it in! There you go, easy. 82 00:12:41,591 --> 00:12:56,255 Now you need to move it up, push it up some. 83 00:12:56,255 --> 00:13:07,087 (That side will go over rather than under, but don't worry about that side yet.) 84 00:13:07,087 --> 00:13:09,734 Close enough! 85 00:13:09,734 --> 00:13:36,793 Who's going to do the screws? 86 00:13:36,793 --> 00:13:54,966 There's someone pressing on the other side? 87 00:13:54,966 --> 00:13:57,428 Solid, nicely done! 88 00:13:57,428 --> 00:14:00,957 Who's going to take a shot at the one up here? 89 00:14:00,957 --> 00:14:03,395 You're pretty light. 90 00:14:03,395 --> 00:15:09,154 More people, more people! 91 00:15:09,154 --> 00:15:46,074 Can you guys inside lift the roof up a tiny bit, a few inches? Right! 92 00:15:46,074 --> 00:16:01,771 Now we do the same thing again. 93 00:16:01,771 --> 00:16:12,080 (holding the person who is tightning the screw by the waist 94 00:16:12,080 --> 00:16:28,891 so he can work without leaning on the roof) 95 00:16:28,891 --> 00:16:34,069 Beautiful! 96 00:16:34,069 --> 00:16:36,554 Now the magic: 97 00:16:36,554 --> 00:16:56,175 3 people on every wall. 98 00:16:56,175 --> 00:17:05,022 Each lifting 10-15 pounds of weight because there are so many. Very gentle lift. 99 00:17:05,022 --> 00:17:09,317 Everybody inside gets ready too. 100 00:17:09,317 --> 00:17:13,892 We're going to lift it up and then we are going to hold it right where we are. 101 00:17:13,892 --> 00:17:17,955 Lift it to full height but we're not going to move around any. 102 00:17:17,955 --> 00:17:30,100 Ready? Lift slowly and gently. 103 00:17:30,100 --> 00:17:35,951 Lift further so it's easier. Once you're at shoulder height it weighs less. 104 00:17:35,951 --> 00:17:41,616 Everybody who is free go inside. 105 00:17:41,616 --> 00:17:51,554 Very slowly begin to walk towards the hexayurt. 106 00:17:51,554 --> 00:17:55,827 Pass the weight to the people inside. 107 00:17:55,827 --> 00:18:09,898 Run to the other side of the building to take it when it comes at the back. 108 00:18:09,898 --> 00:18:23,807 Now we need more people on the outside. 109 00:18:23,807 --> 00:18:26,965 Lower very gently. 110 00:18:26,965 --> 00:18:42,987 Keep it aligned with the corners, mind your fingers. 111 00:18:42,987 --> 00:18:51,996 Add more screws to hold down the roof properly. 112 00:18:51,996 --> 00:18:59,125 Placing the mid-wall roof-blocks 113 00:18:59,125 --> 00:19:03,072 This is a 120º block and it goes right under the section -- 114 00:19:03,072 --> 00:19:18,351 where the two pieces of the roof cross. 115 00:19:18,351 --> 00:19:55,503 Hold the block from below so that it's screwed tight. 116 00:19:55,503 --> 00:19:58,359 Then from the inside you put in another screw -- 117 00:19:58,359 --> 00:20:07,600 and that locks it onto the roof. 118 00:20:07,600 --> 00:20:08,462 First footing! 119 00:20:08,462 --> 00:20:09,887 (it's a Scottish thing) 120 00:20:10,895 --> 00:20:33,734 I can even put my hands up! Quite spacious. Thanks very much! 121 00:20:33,734 --> 00:20:35,345 20 people inside and 122 00:20:35,345 --> 00:20:36,712 some additional notes 123 00:20:36,712 --> 00:20:40,767 For Burning Man people typically have so much equipment with them -- 124 00:20:40,781 --> 00:20:46,035 that they have to gang-carry stuff on a truck. 125 00:20:46,035 --> 00:20:50,859 How many people do we have in here now? 126 00:20:50,859 --> 00:21:04,652 17 and we have some space in the middle ... 19. 127 00:21:04,652 --> 00:21:14,845 Come on in, it's a hexayurt, not a clown-car. 128 00:21:14,845 --> 00:21:46,169 A tonne of shelter for not much money. 129 00:21:46,169 --> 00:21:47,818 You don't have to build them out of wood. 130 00:21:47,818 --> 00:21:55,341 You can use corrugated plastic and tape and then it can be folding. 131 00:21:55,341 --> 00:22:03,932 Hexayurt experience. 132 00:22:03,932 --> 00:22:09,319 Half the price of a relief tent, lasts 3 times as long, about the same size. 133 00:22:09,319 --> 00:22:16,099 5 years, maybe 10? 134 00:22:16,099 --> 00:22:20,929 It's on every continent, now -- test units only, though. 135 00:22:20,929 --> 00:22:31,796 Antartica? If you use a nice thick structural insulated panel, why not? 136 00:22:31,796 --> 00:22:42,361 Mongolian yurts. Every culture has a shack or a hut which is about this size. 137 00:22:42,361 --> 00:22:57,593 The English had benders. 138 00:22:57,593 --> 00:22:58,917 Gang carrying the finished hexayurt 139 00:22:58,917 --> 00:23:01,285 and the relocatable building idea 140 00:23:01,285 --> 00:23:11,340 We need 18 folks all the way around. 141 00:23:11,340 --> 00:23:18,445 Don't lift before we have 3 on each side. 142 00:23:18,445 --> 00:23:24,459 Focus your lift right at the corners where the hexayurt is screwed down to the wall. 143 00:23:24,459 --> 00:23:30,380 Put your hand close to the corners. 144 00:23:30,380 --> 00:23:32,609 For the people who are at the corners, hold by the corners -- 145 00:23:32,609 --> 00:23:36,905 everybody else hold by the middle. 146 00:23:36,905 --> 00:23:44,080 We're going to go to that no-fire sign, see it? That's 5 feet. 147 00:23:44,080 --> 00:23:54,738 So at the count of 3, lift very slowly - 1, 2, 3 - and walk. 148 00:23:54,738 --> 00:23:59,451 So this is the relocatable building thing. 149 00:23:59,451 --> 00:24:11,061 And stop, and down. Clap! Good! 150 00:24:11,061 --> 00:24:13,894 What you do is you screw some aditional bits of wood to it -- 151 00:24:13,894 --> 00:24:15,891 to make it a frame to carry it by. 152 00:24:15,891 --> 00:24:18,863 Then you get 20 people to carry it on their shoulders -- 153 00:24:18,863 --> 00:24:21,580 and you just walk somebody's house to where they are going to live in next. 154 00:24:21,580 --> 00:24:23,670 That means you can build semipermanent structures -- 155 00:24:23,670 --> 00:24:26,526 that you can still relocate if you've got to move your camps. 156 00:24:26,526 --> 00:24:28,987 For example in Haiti you could build hexayurts -- 157 00:24:28,987 --> 00:24:33,004 and if you have to relocate 5 miles to a new centre, you can do it. 158 00:24:33,004 --> 00:24:40,179 It's a slow process but you have time and lots of manual labour on hand. 159 00:24:40,179 --> 00:24:43,360 Thank you! 160 00:24:43,360 --> 00:24:46,333 Back to parts 161 00:24:46,333 --> 00:25:14,296 This is just running it backwards. Nice work folks. Nice!