M mathepac Registered User Messages 8,611 1 Feb 2010 #21 seantheman said: It's a concrete or steel beam that straddles your window or doorway to help support building work above this level Click to expand... , by transferring the load of the wall away from the door frame or window frame to the wall on either side of the opening.
seantheman said: It's a concrete or steel beam that straddles your window or doorway to help support building work above this level Click to expand... , by transferring the load of the wall away from the door frame or window frame to the wall on either side of the opening.