Green Acres Portable Buildings are designed to withstand the harsh environs of the cattle industry. Made from heavy duty steel. These buildings are strong. Our most common size is 12' x 36'. We pride ourselves in delivering a very usable strong building. Gates on the front flip up to allow only access to calves. We can line the building with green treat plywood for added security. Check out all the options below. Call for a price or stop by and design your next portable building with Green Acres,