I am trying to apply an average life span of structural steel columns (A500 Grade B) with a reduced capacity due to corrosion. Where can I find some good information to put some kind of calculation to this?
Background information
We design structural steel gas station canopies all over the US with all of the structural steel exposed. I understand that typically this should not be an issue because of coatings. In doing some research I have found that many of these canopies were designed with an “internal splash drain” which pretty much dumped all of the drainage into the interior of the column. The columns base plates are also below grade with concrete laid about a .25 of an inch from the edge of the column walls in order to fully enclose anchor bolts etc. this leaves and area for water to set between the columns and the concrete.
I believe three conditions apply to this.
Rain Water
Acid rain
Salt Water
Thanks in advance.
Jermey
Background information
We design structural steel gas station canopies all over the US with all of the structural steel exposed. I understand that typically this should not be an issue because of coatings. In doing some research I have found that many of these canopies were designed with an “internal splash drain” which pretty much dumped all of the drainage into the interior of the column. The columns base plates are also below grade with concrete laid about a .25 of an inch from the edge of the column walls in order to fully enclose anchor bolts etc. this leaves and area for water to set between the columns and the concrete.
I believe three conditions apply to this.
Rain Water
Acid rain
Salt Water
Thanks in advance.
Jermey
