Cambering

from The Collaborative International Dictionary of English v.0.48

Camber \Cam"ber\, v. t. [imp. & p. p. {Cambered}; p. pr. & vb.
   n. {Cambering}.]
   To cut bend to an upward curve; to construct, as a deck, with
   an upward curve.
   [1913 Webster]