One person assemble is possible.  I layed it flat on the deck, used a wall for bracing and a rubber mallet.  Only needed a few taps, mainly to save on hitting with my hands.  The arch, posts and slats are hollow vinyl.  Predrilled holes made this item easy to fit together.  The ground stakes (2) are separate and made of metal.  They are L shaped wide piece that slides part way inside the support posts on each side.  A sturdy support system.  Easy instructions included.