12x20 shed plans with garage door: a 12x20 shed with a garage door is the perfect way to increase accessibility to the shed. having a large garage door allows you to easily drive 4 wheelers or riding lawn mowers into the shed. it also makes it easy to move large tools in and out of the shed to give you more space when it comes time to work in. Wooden floor option with 2x6 treated floor joists 16' on center; concrete floor option shown with plans; how to purchase these 12x20 barn shed plans: (free cupola plans w/purchase) if you are ready to build this neat barn with lots of storage space that's easy and fun to build, especially if you get your family involved, please use the 'buy. I magine years of enjoyment from superior quality of work in zeeland and lowest prices, because the most reputable licensed plumbers in zeeland and nearby compete for your attention today, on tuesday..