bridges

Boring bridge engineering stuff.. Compare and contrast:

false creek bridge

False Creek Bridge in Vancouver (pic by tab2space)

shelby

Shelby/Sparkman Street Bridge in Nashville

Notice the trusses look nearly identical. I researched it a bit and it looks like ther are just various kinds of truss bridges that were commonly built. This document has this to say about the Shelby street bridge here:

Significance: The bridge possesses state level engineering significance as an example of the through Parker and camelback truss types for its uncommon concrete trusses.

It doesn't seem to bear much resemblance to the example of a Parker truss on the wikipedia page, though.

Anyone know more about this type of truss, or have any other similar examples? I know I've seen examples in other cities that look nearly identical.. I'm hoping Aaron, bridge fanboy #1 will chime in.

  • Tobin

    I have been across and under that top one a more than a few times.
    There are only so many efficient ways to distribute the load to the posts, whatever the heck the supports are called.
    I am getting fond memories from that hell of a class called statics long long ago. Which pounds into your head 3 basic things. The sum of all forces at any point is zero, the sum of all moments about any point is zero, and you can’t push with a string.