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Archive for November 22nd, 2012

Electrical Grounding: Not Like This

 Corroded Grounding Strap - Walkway Over the Hudson

Corroded Grounding Strap – Walkway Over the Hudson

Spotted this through the railing on the north side of the Walkway Over the Hudson:

I’m not sure what it’s bonding to the bridge structure, but the corrosion where the braid touches the I-beam suggests an electrical potential drives the reaction. There’s stout bonding braid connecting all the railing sections together, but this braid wanders off below the decking and seems too casual / flimsy for lightning protection.

The rivets date back to the late 1800s. I suspect that bolt won’t last nearly as long…

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