We know that breaking up the look of the pergola, especially on the wider versions, is a popular request. We'd like to make sure you get whatever you need to enjoy your unit. Here we sell the center beams cut for an 8' unit, 10' unit and 12' unit lengths. 

They are designed to fit in between the gutters of your pergola, so they won't be the dimension selected, but rather sized to fit the pergola of the dimension selected! (example: the 12' unit center beam is cut to 129".