Sure thing,

they also increase the torsional rigidity (shear resistance) of the structure preventing the wing from over flexing along both its length and diagonal axis. The stresses on a load bearing floor are akin to those on a wing under high acceleration along a moving axis (e.g., a snap).

In terms of design though (not necessarily engineering), the analogy between the joists and ribs and trusses and shear webs struck me as interesting. The main difference being that these floors have their trusses in between "spars" (structural beams) rather than against them.

Somehow I don't think my floor would fly very well however...unless of course I hollowed it all out and put a good engine on it.