Does Mercy's damage boost apply to turrets? [duplicate]

Mercy's Caduceus staff has an alt-fire that increases an ally's damage while channeled.

Does this damage buff also extend to structures, such as Torbjörn's turrets or Symmetra's sentries, if their owner is currently receiving the buff? If so, is it global -- that is, is there a maximum range the structures can be from Mercy or her target to receive the buff?

No, the buff from the Caduceus does not affect structures, only the damage output from weapons on the hero you are buffing.

This means:

• Tobjorn's turrets are unaffected by the buff
• Symmetra's sentries are unaffected by the buff
• Symmetra's teleporter is unaffected by the buff
• Junkrat's rip tire is unaffected by the buff

You can buff abilities like Bastion's Sentry mode since it counts as his own weapon and not a separate entity.