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We are looking at replacing the top section of a 75foot boiler stack. The stack is a self supporting stack and has a 3.5ft inner diameter at the last 50ft. This section was just replaced 12 years ago. It was 7/16" thick A285 Gr C carbon steel. It is eaten away by the flue gas from the...

CSEIIc You are correct. I apoligize for the word mix. I am calling it a footing but the correct name is pier (14"x14") which is then attached to a footing 4-feet underground that is 6'x6'x15". Again, I appreciate your responses.

Thanks again for your responses. I believe this footing was put in place in 1951. I agree that this is small for a concrete footing. The frame of the coal shaker is W10x21. The base plate is 12x12".

Thank you for your reply. The concrete footing is only 14 square inches and I will have to look at edge distances and whether there is enough to core drill. Thank you again.

I have been asked to determine a way to repair or replace the anchors on a concrete footing supporting a steel frame for a coal car shaker. The existing anchors have broken at the top of the base plate due to corrosion. I have been told that the entire concrete footing will have to be...

I work at a facility that has been in operation for over 50 years. Some steel support in our Powerhouse has become corroded. We are thinking of welding flat steel plates on the flanges of the I-beams instead of replacing the beams. I have found some documentation on reinforcement of steel...