Dal 1953 scale elicoidali in cemento armato.
La scala elicoidale è formata dalla sovrapposizione di gradini di conglomerato cementizio vibrato di grande solidità e facile montaggio.
Si può montare sia all’interno che all’esterno di qualsiasi costruzione.
Le sue proporzioni ben equilibrate ne fanno un’elegante spirale che si innalza con i nastri delle fasce laterali tra cui si inseriscono i gradini.
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