welding plate on existing wh

huangyhg

welding plate on existing wh
if i weld additional plate on the flange of existing column and i weld it all the way (not stitch weld) what are the possible disadvantage of this?
is it more recommended to stitch weld this additional plate..
that's a lot of heat.  i would think that as you weld down one side (say starting at the top), by the time you get to the bottom, the top will be cooling and starting to distort.  why would you weld all the way around?
is this plate the full height of the column?
the cost associated with the weld seems like it will be a lot higher than it needs to be.
continuous welds are often made as stitch welds and then fill in the gaps.
is the column loaded at the moment?
welding heat and distortion could make it fail if it is currently in service
how does an engineer check or make sure that the welding of additional plate on an existing column or beam wont be lower the capacity of that existing   
second time in a week i've said something along these lines, however aisc has a great deal of articles, design information, etc, on how to deal with this problem.
search for previous threads about welding to existing structures.  there's lots of information already discussed.
cheers,
ys
b.eng (carleton)
working in new zealand, thinking of my snow covered home...