Acadia Post & Beam Share: Services Acadia Post & Beam Visit Website 2379 US HWY 1 Sullivan, ME 04664 (207) 422-4700 About Map About Acadia Post & Beam uses rigid, self-supporting structures where the timbers come together with rugged mortise and tenon joinery. Characterized by large open spaces and catherdral ceilings. What's Nearby? Distance: 5 10 15 20 25 50 mi.