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Need advise on adding tension rod to wood beam to control deflection

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A client built a custom home about ten years ago. He installed a 6x14" DF#1
beam through the livingroom to span 27 feet. The beam was supported at each
end and with a column in the center - 13'-6" each clear span.
A new homeowner wants to remove the center column. The original builder is
on the scene and wants to consider an alternative to replacing the beam or
adding a beam below the existing.
He suggested the installation of a tension rod at the bottom of the beam to
pull the beam up level. I've done similar in truss repairs, but don't feel
comfortable with this since it would either rely up lag bolt connections at
the angled plates on each end or require the contractor to plate the top and
bottom of the beam and drill through the 14" member. The top is probably
already solid blocked which would make the installation of the top plate
difficult.
Any suggestions.
Has anyone tried using 1/4" steel plates on both faces of the beam and
stitching through with machine bolts (similar to a flitch plate design)?
I could use some advise on this one.
Dennis Wish PE