Check the listing for details. “A Wing-Joist Frame Barn” 1917 HowTo build Plan INFO. Condition: Very Good. Listed at 10.89 USD. The truss system used permits construction without crossbeams in the barn, so that the floor is clear except for the braces, and the haymows are free from obstructions”. We do not photocopy these. They are not step-by-step instructions - hands-on experience is necessary.