Apr 19, 2022 / Suggestions of a 16 foot span opening on pole barn #11 L lman Veteran Member Joined Oct 3, 2009 Messages 2,376 Location Indiana Tractor New Holland 3040, New Holland 1530, Oliver 1850 My 40 x 56 x14 has 2 20' doors. One at each end so you can drive through it.