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In 1853 Coignet built the first iron reinforced concrete structure, a four-storey house in the suburbs of Paris. [7] A further important step forward was the invention of the safety elevator by Elisha Otis, first demonstrated at the New York Crystal Palace exposition in 1854, which made tall office and apartment buildings practical. [8]
Arophobia; Anti-albinism; Acephobia; Adultism; Anti-altruistic; Anti-autism; Anti-homelessness; Anti-drug addicts; Anti-intellectualism; Anti-intersex; Anti-left ...