Weekly Photo Challenge: Layers

“…Seismic Isolators are devices that allow the bridge to move in an earthquake; this  movement reduces the forces that the bridge experiences during the earthquake.” —excerpted from a Golden Gate Bridge exhibit.

This Seismic Isolator has been cut in half to illustrate how layers of steel and rubber are bonded together to form a three-foot diameter cylinder that supports the structure at key points. These isolators can reduce the seismic forces by as much as two-thirds when compared to a non-isolated bridge.

Seismic Isolator Photo © Allan G. Smorra, All Rights Reserved

Seismic Isolator
Photo © Allan G. Smorra, All Rights Reserved

Photo Notes: iPhone 5 camera, shot with Camera+ app, edited in Snapseed.

Weekly Photo Challenge: Layers


  14 comments for “Weekly Photo Challenge: Layers

  1. vastlycurious.com
    November 19, 2013 at 4:49 PM

    THIS is amazing! The technology was eventually applied to new construction wasn’t it Allan?


    • November 19, 2013 at 9:25 PM

      It is holding up the bridge as we speak.

      Sent from my iPhone



      • vastlycurious.com
        November 20, 2013 at 5:54 AM

        I know, I read about your beloved bridge through your Blog and I also googled it when we first started writing. It’s a wonderful thing PLUS that Video : ))))


  2. November 17, 2013 at 10:06 AM

    Shockingly good photo. 🙂


  3. November 17, 2013 at 5:56 AM

    Great photo – is that slight wavy compression in the core from previous earthquakes?


  4. November 15, 2013 at 11:06 AM

    I’m intrigued by the image–reminds me of an abstract sculpture rather than a utilitarian object.


  5. November 15, 2013 at 10:48 AM

    Bloggers blog to connect and communicate and are presumed to be creative people. I prefer text with my images so thanks for including a quote and some explanatory text above. Granted that pictures are worth thousands of words and the layers are, of course, visible in the image, but I have grown tired of visiting blogs of those who are too lazy to post text with their images.


    • November 15, 2013 at 11:14 AM

      Thank you for your comment. I started out in the “less is more” school of accompanying text with photos and over time I have embraced text as necessary background information/explanation.


    • November 15, 2013 at 1:07 PM

      I’d like to second this thought. I would have thought the picture was an accordion.


      • November 15, 2013 at 6:03 PM


        Thanks for taking the time to comment. This challenge was fun.


    • November 17, 2013 at 5:55 AM

      “Lazy”? Not everyone is eloquent nor chooses/feels able to provide text with their images – it is the blogger’s prerogative to do as they feel and not as their readers desire….


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