Common port walls are like the side top and bottom of the box itself. This way you only need 1 piece to make the port. If the port is not as tall as the box you can still have 2 common walls and will need to make two port pieces. If you place the port in the middle of a box face you will need to make 4 port walls. By using common walls you reduce the port material displacement. I hope this helps
Common port walls are like the side top and bottom of the box itself. This way you only need 1 piece to make the port. If the port is not as tall as the box you can still have 2 common walls and will need to make two port pieces. If you place the port in the middle of a box face you will need to make 4 port walls. By using common walls you reduce the port material displacement. I hope this helps
My port is on the drivers side & isn't long enough to need to make an L just goes straight back 19" against the top/bottom pieces so would that be 2 or 3?