Long piece of wood (4)
(Other definitions for beam that I've seen before include "Smile, transmit (radio signal)" , "Smile brightly - supporting timber" , "Horizontal structural member" , "Ship's width; ray" , "Smile widely; ray" .)
(Other definitions for pole that I've seen before include "Long, round rod" , "Limit" , "Rod, perch" , "Magnet end" , "Chopin, for example" .)