The Collaborative International Dictionary of English v.0.48:

Hogging \Hog"ging\, n. (Naut.)
   Drooping at the ends; arching;-in distinction from sagging.
   [1913 Webster]

   Hogging frame. See Hogframe.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Hogframe \Hog"frame`\, n. (Steam Vessels)
   A trussed frame extending fore and aft, usually above deck,
   and intended to increase the longitudinal strength and
   stiffness. Used chiefly in American river and lake steamers.
   Called also hogging frame, and hogback.
   [1913 Webster]