Thursday, February 8, 2007

An Experiment

I was out of my favorite tea and decided to walk to Harvest Market which requires crossing the Highway One / Noyo River Bridge. This bridge was recently rebuilt to the tune of around $30,000,000.00.

While walking the pedestrian walk way on the east side I noticed expansion joints in the guard rail separating us walker/bicyclers from the car/trucks. Expansion joints allow for the expansion and contraction of large object due to temperature changes. I discovered there were two of these joints located about equal distance from the north and south ends of the bridge.

After buying my tea I headed home and decided to stop and measure the “gaps”. Not having a tape measure with me I decided to use the change in my pocket.
South expansion joint
North expansion joint

As you can see, both gaps are just over .75 cents wide.

When I got home I checked the outside temperature. 47 degrees.

So, 47 degrees equals a little more than .75 cents.

As warmer weather arrives I will revisit the expansion joints and see how much they close as the bridge warms up.

And here I was thinking I was going to run out of things to do in this small town!!

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