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Design requirements

Home Forums Archive Structure Designs Design requirements

This topic contains 20 replies, has 14 voices, and was last updated by Profile photo of ellmer - http://yook3.com ellmer – http://yook3.com 4 years, 2 months ago.

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    Profile photo of Sundiver
    • Ferrocement- In my experience, ferrocement is rebar and wire cloth with concrete troweled on. Aren’t we talking about steel reinforced poured aggregate concrete here? I think that’s what existing concrete TLP’s are constructed with.
    • Here’s a link to the Floatec site where there are some good illustrations that I’m using to comment.
    • TLP- http://www.floatec.com/tlp.htm
    • I think for most of thebastige’s opening points 1 thru 7, the TLP like the Hutton or Heidrun platforms fulfill them. I agree that a spar can be made to work for a small platform. The spar has some really great advantages such as reduced heave. That’s great if you have a need to support a rigid structure to the stationary bottom, like a drill riser. Seems to me though that the TLP could provide a more suitable arrangement for a colony as Jesrad points out. The spar is vertically arranged, limiting solar area, greenhouse area, and personal space. The TLP with its more horizontal design instead of vertical, would possibly provide more usable, high value space than the spar.
    • There are already concrete TLP’s out there. The Heidrun field platform is one. http://www.km.kongsberg.com/ks/web/NOKBG0240.nsf/AllWeb/ABD72633D883B154
    • The Hutton TLP is even older.
    • A colony platform would be considerably simpler than the Hutton or Heidrum. Might be more like a parking garage with each level smaller than the one below. Spaces could be customized as needed or prefabbed modules slid in. Like a trailer park in a parking garage. (just kidding sort of).
    • I think the cost would be lower than a spar on several counts. Deployment is one. The spar has to be built in deep water doesn’t it? The TLP can be built by pouring and launching the base and columns, submerging it to the bottom in a shallow harbor, and then continuing the construction. Then deballast, tow it to the site, ballast down, connect the tension leg anchor lines, and pump it out. Studies need to be done but I just can’t see a spar being cheaper per available area. With the TLP, possibly the base and lower legs could be shipyard constructed and the rest self constructed.
    • The TLP is a very nicely stable platform too. Think of it as an upside down pendulum. Now make it a box with 4 strings instead of one, cut the sides out to let waves through, put a lot of weight in it and immerse it in a viscous fluid. The TLP is more stable in all dimensions than a floating platform.
    • The TLP configuration would allow all occupied spaces to be above the waterline. Improved safety, lower cost, and more high value space are a few advantages. Some mechanical spaces could be located in the upper legs but basically ballast tanks aren’t suitable for much else.
    • Size- bigger is better as far as seaworthy goes. Safety/longevity (because it will meet its end in a storm) is increased by increased size, all other factors equal. So, in this application, a bigger cheaper structure is better than a smaller more expensive one.
    • I think durability would be measured in decades not years. Regular maintenance like biofouling removal and anchor replacement would be rather easy.
    • Periodic inpections post- any structure would require inspection and maintenance. Concrete cracking is less of a problem because the temperatures don’t vary much like they do on land. Repairs to concrete structures underwater are a mature technology. Steel reinforced concrete can be self repairing with the marine accretion process. The steel is electrically charged and if there is a crack, accretion occurs that mends it. You can also just send a diver down to inject epoxy for repairs that are permanent. No problem.
    • Economics matter. indubitably. While no structure lasts forever, a big, overbuilt concrete one, maintained, would have a lifespan measured in decades by depreciation/amortization accounting methods and maybe even centuries in real terms if the interest remains.
    • Carbon fiber? or titianium? The least cost material to satisfy the engineering requirements is the best choice. Weight is not a determining factor here but cost is.
    • Maintainablility- External hull maintenance would consist of pressure washing the growth off to inspect the hull, and repairing cracks. Leg maintenance would require periodic cleaning and inspection, and scheduled replacement. This is normal idustry standard stuff.
    • can’t believe I’ve been here this long with an exam this week! DOH!

    Profile photo of vincecate

    I think getting high level goals and requirements for the structure could be best organized on a wiki. So I started a page at:


    Have link to this on the main page under “Structure Designs”.

    — Vince

    Profile photo of lord_leapord

    Make hydrogen through electrolysis, sea water is pumped in to Processing tank, electrolysis breaks is down to Hydrogen and Oxigen. the hydrogen Is then use to power genatarors, cooking and such. Oxigen would be piped through ventalation systems, and stogage refill sights for Dive Tanks and such.

    all Genarators Should have Stanless Steel Exhaust and the by product of burning hydrogen is water. which is recollected.

    Distilling of Sea Water, set up a boiler system Useing hydrogen Burner, the Steam would be used to Power other Food Processing systems ( such has Gran processing Mills ) to make Flour, or corn meal.

    By Product of the Water Distilling would be Sea Salt

    Which could be exported if not used for other process , such as Curing of meat or Turned in to Clorine

    ok so where Does the Electricty come from for the electrolysis, in the First place solar panels on deack for shade or roofs on barns for Farm animals

    The First Thing to Build is The Floating Farm out of a Old Tanker of some sort above deck is coverd with irragation system concisting of Farming tiles and Gravel covered with Top soil,


    Corn grown for feed of livestock, cooking oil , processed in to ethonal or yes moonshine.

    Grapes for juice and wine.

    Rice for food and sakie

    patatos food and vodka

    soybeans cooking oil, tofu

    and other comon veg.

    Live stock

    cows for meat milk and cheese

    rabbits for meat

    chickens eggs and meat

    pigs for meat

    Bees for Pollination of crops and Honey and meade

    Freash water Fish Farming Catfish, Cropie, Trout, Bass

    earth worms

    so basically what we need is to get a small Labratory the can Process the Sea Salt, Make Cooking oils, and other items that can be made from crops and animals

    small dairy processing faclity

    Meat Processing Faclity

    hello after looking at seveal options and yet have not seen any real,

    proposals. Todays socities is base on a Instant Youth,

    Instant meals, and such with no thought on how things are made or where they come from.

    In order to have a total self suficiant Socities on must go back to the basics

    Total use of Resorces, and yes it won’t be easy, No simple fixes.

    Ok food storage options

    Old Fashond Canning usiing Glass Jars

    dehydrated food storage

    Cold Storage


    Cooling systems should be powered by Electricy/Gas

    Gas meaning Hydrogen


    Profile photo of Todesking

    Has anyone looked at Earthships for inspiration. They are homes designed to sustain its inhabitants providing them with power, water, food, and protection from the elements. I am not saying we should build an earthship on the seastead but they do have a lot of good ideas that could be used with a seastead project.They use solar and wind power, collects rain water for use, have living spaces with built in greenhouses, they resuse grey water, and is built from concrete and recycled products.






    Profile photo of shredder7753

    uh hey guys, yea lets all go get an earthship. then we can unhelp spread life throughout the universe. :-(


    My Work II

    “Leadership and do-ership are not the same thing”


    I like the idea of the earthship (a house that contains and produces all a family needs with local resources) – lets get a “Oceanship” – i propose the captain nemo float out…to colonize the ocean….

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