Cover plate beam where shoring is not feasible 2

[Dennis59]

Hello,
I have a situation where I need to install bottom cover plates on steel beams over an area where it would be extremely difficult/expensive to install shoring under the beams. The undersides of the ends of the beam are accessible, but not the main 30-ft span.
My understanding is that it is best practice to shore a beam before coverplating to relieve the dead load stresses in the existing beam.
I am thinking of calling for a W8 section for the "cover plate", and requiring that the W8 be cambered upward. One end of the W8 would be placed tight up to the bottom flange of existing beam. Then the other end would be jacked up until it also comes in contact with the existing beam. The upward camber in the new W8 cover plate would serve as "shoring" under the existing beam, thus relieving at least most of the dead load stress before the new W8 is welded on.
Does this sound conceptually feasible? Have any of you done something like this successfully?
Thank you.

 

[BAretired]

I don't believe the proposal of cambering a W8 will provide enough stress reduction in the W16.

The detail below shows the live end of a W8 which reduces the over-stress in the W16 by a desired amount by stretching the W8 and compressing the bottom of the W16. The opposite end would be similar, but without any gap. Bolts would be fully tightened at each end and the gap would be closed (the initial gap size would be calculated).