Ponttonisilta

Porin vuonna 1855 valmistunut Charlotta-silta kuvattuna vuonna 1926 Porin sillan työmaalta.

Ponttonisilta on kelluva silta, jota kannattavat proomun tai veneen kaltaiset ponttonit. Ponttonisillat ovat yleensä väliaikaisia, mutta joskus niitä voidaan käyttää pysyvästikin. Pysyvä ponttonisilta on tarkoituksenmukainen suojaisessa paikassa, johon ei ole taloudellisesti järkevää rakentaa kiinteää siltaa. Siitä voidaan myös poistaa tai siirtää osa, jotta laivat pääsevät kulkemaan ohi.

Sotilaskäytössä ponttonisillat ovat yleisiä. Vesistön ylityksen jälkeen ponttonisilta voidaan tuhota, jottei vihollinen saisi sitä käyttöönsä, tai purkaa ja kuljettaa uuteen ylityspaikkaan.

Ponttonisiltoja on käytetty antiikin ajoista lähtien.

Aiheesta muualla

Ponttonisiltoja Structurae-sivustolla en.structurae.de. Viitattu 29.3.2009.

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