Zuaro & Torroja,  sports hall, Madrid, Spain - shells beam
 shell beam - cylindrical shells diagram
 Felix Candela, Seguro Social Shell, Santa Fe, New Mexico
 Alloz Aqueduct, Spain - shells beam - cross section
 Alloz Aqueduct, Spain - shells beam 
 Britania Bridge, Wales - section
 beam - poor detail of bolted connections
 
 steel reinforced beam - section
 fitness center, Wolfsberg, Switzerland - beam structure example
 plate girders - intermediate flow chart
 web buckling in W38 steel beams - bearing sections
 skeleton frame - reinforced concrete with steel flanges
 Sears Tower, Chicago, IL - skeleton frame construction
 Borden Building, Columbus, OH - skeleton frame construction
 skeleton frame construction - W14 steel column 
 skeleton frame - reinforced bar unit
 Hennebique system [1892] - skeleton frame/reinforced concrete
 principle of reinforced concrete - beam diagram
 reinforced concrete continuous member - beam diagram
 Louis Kahn, Kimball Art Museum, Fort Worth, TX - post-tension deep beams 
 Louis Kahn, Kimball Art Museum, Forth Worth, TX [1972] - barrel vaults
 Louis Kahn, Kimball Art Museum, Forth Worth, TX [1972] - roof section
 Louis Kahn, Kimball Art Museum, Forth Worth, TX [1972] - exterior
 Madrid Hippodrome, Madrid, Spain - freehand section drawing