what is the degradation of structural steel after a fire
 

what is the degradation of structural steel after a fire?
i have to determine the structural integraty of one of our buildings that sustained a fire last week. what is the reduction for allowable stress, if any, after the material has been subjected to a fire?
henri st. denis
project engineering
solutia chemical

this is too broad a question to give you a meaningful answer;
what code do you want to check this against?
how long was the fire?
of what intensity?
what protection was present to reduce the possible effects on the steel?
what are: the building layout, the length of the columns, the type of floor system, the actual sizes and connections of
you should hire someone experienced for this. there is a lot of liability involved in ssaying a structure is acceptable.
here is a generalization of the assessment of steel for reuse.
this is for british steel but is applicable to the us variety.
the article is form a book from corous publications, which might be a good investment.