{"version":"1.0","type":"link","title":"Reciprocal frame - Newikis","description":"A reciprocal frame is a class of self-supporting structure made of three or more beams and which requires no center support to create roofs, bridges or similar structures.","provider_name":"Newikis","provider_url":"https://newikis.com","cache_age":86400,"thumbnail_url":"https://thumb.wikimedia.org/wikipedia/commons/thumb/5/5b/Three_stick_reciprocal_frame.JPG/1280px-Three_stick_reciprocal_frame.JPG","thumbnail_width":1280,"thumbnail_height":960}