Start with use, layout, and clear space
List what the building must do before settling on dimensions: storage, a vehicle or equipment workshop, agricultural use, a home-and-work combination, or another purpose. A clear-span layout can keep the interior free of columns, while a frame with interior supports may suit some wide spaces; neither is universally best. MBMA notes that metal building systems are custom designed around use, applicable codes, loading, and serviceability. Think through vehicle turning and door clearance, work zones, storage, future expansion, and desired interior height. For a barndominium, distinguish living areas from shop or storage space early. 14B can help organize these priorities and discuss options, while the specific frame, loads, and dimensions require project-specific design review.

