Sinusoidal Door

By John Farrier in Architecture, Pictures on Nov 30, 2009 at 3:35 pm

This door by the architectural firm Matharaoo Associates is designed to resemble a sine wave. Now in the home of a diamond merchant in Surat, India, the door measures 5.2m high and 1.7m wide and is made from 40 blocks of teak. Thanks to 160 pulleys and 80 ball bearings, it pushes open easily, despite its weight. More pictures at the link.

Link via Fast Company | Photo: Dinesh Mehta


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  1. Skipweasel
    Nov 30th, 2009 at 4:24 pm

    160 pulleys? I wonder how long it’ll be before it gets sand in its work and grinds to an embarassing halt.

    It’s neat though – wish I’d thought of it.

  2. Ros
    Nov 30th, 2009 at 5:34 pm

    Even neater if it doubled as a spiral staircase. That is, so long as no one ‘closes’ the door while you’re coming d-… Oh crap. Never mind.

  3. Gauldar
    Nov 30th, 2009 at 7:47 pm

    Looks expensive. If I wanted something like this installed in my house, I would have to cosine for it.

  4. pwscott
    Nov 30th, 2009 at 8:26 pm

    Why did they build this instead of installing an automatic door? Artsy yes. Leave art to the galleries and museums. :p

  5. Skipweasel
    Dec 1st, 2009 at 4:06 am

    Nah – art is to be lived with. Possibly the last place it should be in in a gallery or a museum.

  6. Jynxerz
    Dec 1st, 2009 at 6:32 am

    Lol @ Gauldar! Cosine!

  7. ryan_sc
    Dec 1st, 2009 at 6:42 am

    C’mon Gauldar and Jynxerz, we’re getting off on a tangent here.

  8. BikerRay
    Dec 1st, 2009 at 7:58 am

    Diamond merchants are doing all right in the recession, then. Priced teak lately?

  9. Skipweasel
    Dec 1st, 2009 at 12:21 pm

    I don’t really understand using teak for furniture. It’s OK for a door or something, but you often see it used for things like chairs – it’s too brittle and weak across the grain for that – you can only use it in very dull designs where the grain is always long and in compression. No good at all for chairs that kids lean back on. I know, I’ve had to put ‘em back together. Its oiliness makes it hard to make glued repairs.

  10. Noelegy
    Dec 1st, 2009 at 7:11 pm

    That’s quite beautiful.


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