A support beam is required on ''every'' wall of a cave tile (both sides) to prevent the tile from collapsing. A reinforced tile can't be mined.
'''Hint:''' If making the support beams outside of the mineand using a small cart, the best approach is to leave it [[unfinished]] (e.g. requiring a shaft or a ribbon) and place them in a [[cart]] since unfinished . Completed support beams will however fit into in a large cart whereas finished ones will not.
[[Category:Carpentry items]]
[[Category:Babel/S]]