3m Geodesic Dome Greenhouse

  • View
    28

  • Download
    3

Embed Size (px)

DESCRIPTION

downloaded from instructables

Text of 3m Geodesic Dome Greenhouse

  • http://www.instructables.com/id/3m-Geodesic-Dome-Greenhouse/

    technology workshop living food play outside

    3m Geodesic Dome Greenhouseby dragonator on February 22, 2015

    Table of Contents

    3m Geodesic Dome Greenhouse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

    Intro: 3m Geodesic Dome Greenhouse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

    Step 1: Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

    Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

    construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

    Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

    Step 2: Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

    Step 3: A Strong Foundation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

    Step 4: The First Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

    Step 5: The second Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

    Step 6: Adding the Dome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

    Corner connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

    Struts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

    Building it up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

    Frame for the door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

    Step 7: A Nice Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

    Step 8: Windows that Open . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

    Step 9: Preserving the frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

    Step 10: Wraping the Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

    Step 11: Finishing the greenhouse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

    Step 12: Whats next . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

    Related Instructables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

    Advertisements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

    Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

  • http://www.instructables.com/id/3m-Geodesic-Dome-Greenhouse/

    Intro: 3m Geodesic Dome GreenhouseAt home, we have a roughly 3m wide, semi-circular piece of land. We also want a small greenhouse. Putting one and one together, it made sense to make a smallgreenhouse on the small piece of land. It is not perfect for a greenhouse (only receiving 4-5 hours of full daylight a day), but it is the best we have.The shape of the ground makes an ordinary greenhouse difficult. Also, I have a love for Geodesic domes. Since the piece of land is already round, it made sense tomake a Geodesic dome. I love domes because they are ridiculously strong and efficient. All struts are only every pushed or pulled on. No bending load ever goes througha strut. Also, the structure of a geodesic dome looks very complicated, but is actually easier to build, because it is massively over-defined. You only need to cut the strutsto length and remember the pattern to completely build it. No tape measure is ever needed during construction.

  • http://www.instructables.com/id/3m-Geodesic-Dome-Greenhouse/

    Step 1: DesignFirst some theory and material choices. A geodesic dome is not difficult to make, but a few things need to be understood before making one.

    Materials

    Lets start with the foundation. The dome needs to be anchored to the ground in a proper way. It is easy to skimp out on this part, since you will not see it later, but astrong foundation is what makes something last. How you do it depends on how long you want your greenhouse to last. Here in the Netherlands, concrete gravel tiles areeasily obtainable for free. They were popular once, but not any more, and when people get them out of their garden, you can usually pick them up for free. This is a win-win, you get free tiles, and they don't have to take their tiles anywhere (weighing 30kg each).The frame is the part you will see, so aside from just strength, aesthetics may also be a consideration. The beauty of the dome is its strength, so you will quickly picksomething too strong. Bear in mind that what you pick will need to be: A. easy to work with, and B. cheap. You are going to need a lot of it. My choice was simple pinewood, 28mm by 44mm. It costs around 1 Euro per meter and is more than strong enough.

    The covering for the greenhouse is the last material being discussed here. There are 3 paths you can take here: Glass, polycarbonate and foil. In decreasing order, theylast, centuries, decades and years. I would love to pick glass, but it is also the most expensive. Polycarbonate you pick if you want to make a well insulated greenhouse,but the cheapest by far is the foil. It is easy to work with and is relatively cheap. When picking foil, do pick greenhouse foil. It is made to withstand UV radiation.

    construction

    Two compromises need to be made in the construction. The first is the bottom spacer. The radius of the dome is roughly 1,5m. This would also have been the height. Iam 1,95m and I want to be able to stand in the greenhouse. With no other solutions, a 0,6m spaces is needed at the bottom. This raises the start of the dome, but is alsoa structural weakness. The dome itself is very rigid, but the spaces, consisting mostly of squares, is kinda wobbly.

    The second compromise is the door. In an ideal situation, there are no interruptions in the frame of the dome. The door is a giant gaping hole. Extra wood was addedaround this area, but even then, it is still the weakest point.

    The corner block are the most varied part of the dome. Everyone has a different system, and all of the different systems have their own drawbacks. My choice as 2 1cmthick plywood disks, one 15cm and one 8cm. When these are stacked, they give a roughly 17 degree angle. The 2V dome that is being built here needs either 15.86degrees or 18 degrees, so it is perfect. The struts are attached from the back with screws.

    Making a window in a geodesic dome is fairly straight forward. Ma