The concrete structure of the Royal National Theatre carries the impression of the timber shuttering Plastic concrete formwork for cross wall Coal tunnel constructed using handset aluminum concrete forms Concrete pool construction using aluminum concrete forms Soffit formwork to a flight of concrete stairs Stair formwork showing the use of strongbacks to support the riser shutters Sketch showing the use timber props for beam forms Coal silo construction using radius concrete formwork Twin steel walers and tie bolts used to secure wall forms Column poured using spiral ducting Concrete slab poured on roll formed galvanized steel with the form as a permanent part of the structure Concrete fence construction using ashlar stone aluminum concrete forms Concrete housing construction in Venezuela using aluminum concrete formwork Concrete construction in Brazil using handset aluminum concrete formwork Concrete construction in Moscow metro using special aluminum concrete formwork Engineered formwork system in Moscow metro Engineered formwork system in Moscow metro Pool construction using "Proster 21" flexible formwork.