An Evaluation of MoDOT's Current Coatings Programs Final ... - TSP2

"Wehrle, Craig"
11/14/2007 12:26 PM
To "'Leonard.Foster@modot.mo.gov'"
cc
Subject
RE: Survey of your state's
coatings program and systems for
both new & existing steel bridges.
For new structures we use zinc, epoxy, urethane and are reviewing polysiloxane.
For existing we use mainly total removal/recoat and some overcoating. We contract the work. We
like our present system. Problems occur when shops circumvent SSPC rules. Getting the primer
coat right is key. The blasting needs to be done with non uniform shot. Mixing a little Black
Beauty helps though it is tough on the machinery.
-----Original Message-----
From: Leonard.Foster@modot.mo.gov [mailto:Leonard.Foster@modot.mo.gov]
Sent: Wednesday, November 14, 2007 11:15 AM
To: craig.wehrle@dot.state.wi.us
Subject: Survey of your state's coatings program and systems for both new & existing steel
bridges.
We are evaluating our current coatings program and systems used for our steel bridges,
both new & existing structures. We are interested in learning what coatings program and
systems your state uses for both new & existing steel bridges. How do you prioritize the
structures for over-coating or recoating? How do you evaluate the steel bridge coatings
used in your program?
New structures:
1) What coating system(s) are used & how are they performing?
2) What new technologies are you reviewing or trying (coatings, materials, inspection, etc.)
Existing structures:
3) Do you use over-coating systems or paint removal and recoating?
4) Do you use internal personnel or contract the work?
5) What coating system(s) are used & how are they performing?
6) What new technologies are you reviewing or trying (coatings, materials, inspection,
etc.)?
7) What problems have you experienced with the new or existing coatings?
We thank you for your assistance and information. Have a good day!
Leonard Foster
Fabrication Technician- Bridge Division
Phone: 573-751-3853
Fax: 573-526-5488
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