Wayne-

Wedge anchors are indeed tested & approved for tensile (wind / seismic)
loads

I've done cyclic testing on wedge anchors and I would never use them
for tensile loading; for shear they're fine but not tensile.

Chemical anchors (epoxy / vinyl esters) are the way to go.

With chemical anchors you drill down deep into the meat of the existing
foooting & improve their performance by de-bonding the top few inches
of the rod

cheers
Bob