I am a CWI currently on a project where the only thing taking place is the installation of a WT section to the bottom flange of an existing beam. While I know this is a useful form of reinforcing an existing building I was curious about one thing. Could the heat input caused by welding the web of the WT to the bottom flange induce a positve camber into the beam due to the eventual shrinkage of the bottom flange? And if so, is this one of the reasons why it is performed or is it strictly to add more dimension to the cross section of the beam. The beam is being welded by 12" long fillets at each end and staggered fillets 4" on 6" throughout.
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