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Webster 1913 Edition

(hā′răkˊ)

Noun.

A frame mounted on the running gear of a wagon, and used in hauling hay, straw, sheaves, etc.; – called also

hay rigging

and

hay rig

A hayrack.

hayrack ‎(plural hayracks)

A freestanding vertical drying-rack for animal fodder.
- 2007 July 3, Verlyn Klinkenborg, “Barn Cleaning”, in New York Times:
  The books flutter down from the bucket on high onto an old hayrack on the floor of the Dumpster.

vertical drying-rack