|The wooden barricade is firmly set but has dried over the years. Might it burn?|
Wooden barricades sometimes bar the way into a vault. You can burn it down with an incendiary dart or Staff of Firebolt or Potion of Incineration. If you lack any of these there is often a fire trap near the entrance to the room, you can bring the flame from this trap to the barricade by throwing a Potion of Creeping Death or releasing some type of flammable gas, and then throwing a dart to set off the trap. It is also possible to destroy a wooden barricade with a Staff of Tunneling.