In un edificio, il corrimano o parapetto è un elemento di protezione, che serve ad evitare la caduta nel vuoto di persone o di oggetti da un balcone o terrazza e in ogni luogo dove si presentino dislivelli tra diversi piani. A seconda della posizione che occupano, il corrimano o parapetto può assumere conformazioni particolari.
I montanti alcune volte sono formati da elementi continui per tutta l’altezza dell’edificio e spesso assume funzioni decorative; per progettarli bisogna tenere conto degli effetti della dilatazione che subiscono per le escursioni termiche.
Si possono trovare anche i parapetti misti, realizzati con parti piene e ringhiere o elementi vetrati.
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La ringhiera è un tipo di parapetto costituito da montanti metallici verticali che sorreggono elementi di chiusura, conclusi superiormente da un corrimano.
Nella loro forma attuale le ringhiere costituiscono l’evoluzione delle soluzioni tipiche applicate negli edifici popolari (le case a ringhiera o a ballatoio) dell’inizio del Novecento.
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