One handed and two handed melee weapons clarifications

[arcador]

It might be just me, but it seems some weapons miss the info for how many hands they require for optimal operating (or are they one handed or two handed).

Specifically by the list from the draft .doc:

• Gravity hammer
  Sledgehammer (most likely 2 hands)
  Staff (most likely 2 hands)
  Static maul
  Arc-field weapon
  Assault pike (this will follow the spear)
  Chaindrive sword and axe (most likely 1 handed)
  Spear (I would say 2 hands, but then the spear can be one-handed)
  Static blade and axe (probably 1 handed)

 

[Nerhesi]

And at what point are 2 hands replaceable with 1-hand (Str 12+? 15+?)