Corroded Rivet - Which ones do I replace
Corroded Rivet - Which ones do I replace
(OP)
I'm working on a pedestrian bridge that have some 20,000 rivets of which 10% are corroded. The corroded rivets range from no head left to only a small amount of head missing. It is easy to decide what to do with those both ends of the spectrum, but how do I decided when where is the point where to much corrosion has occurred.
Does anyone have any guidelines on determining when a rivet should be replaced?
The next issue is a quick method to determine if a rivet passes or fails the guideline. I was thinking of some type of templates that you place over the rivet but as there are so many different possibility I not sure this would work. Anyone got any bright ideas on how this could be done?
Does anyone have any guidelines on determining when a rivet should be replaced?
The next issue is a quick method to determine if a rivet passes or fails the guideline. I was thinking of some type of templates that you place over the rivet but as there are so many different possibility I not sure this would work. Anyone got any bright ideas on how this could be done?





RE: Corroded Rivet - Which ones do I replace
To answer your first question we need to know the answer to the above question or you can't pin point where to look or investigate.
ANY FOOL CAN DESIGN A STRUCTURE. IT TAKES AN ENGINEER TO DESIGN A CONNECTION."
RE: Corroded Rivet - Which ones do I replace
Most of the rivets that are corroded have been in locations where they is higher humidity / moisture and the painting system has failed.
Aluminum or stainless is not a option due to galvanic corrosion.
RE: Corroded Rivet - Which ones do I replace
You can also download a report from the US Army COE. It's a finite element analysis method to determine when rivets need to be replaced.
Technical Report ITL-99-5
December 1999
Rivet Replacement Analysis
RE: Corroded Rivet - Which ones do I replace
One thing to keep in mind - I'm sure you know this - particularly if you're working in a heavily traveled area: Watch out for flying rivet heads and shanks. Depending on your situation, you need to have the contractor put two people on the work: One busting the heads and shanks and one catching them.
RE: Corroded Rivet - Which ones do I replace