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Första betongbron vid järnvägen (Bana)

av Sune Nylén @, Thursday, March 20, 2008, 11:18 (6111 dagar sedan) @ Anders Ö

1912 till 14 gjöt man in den gamla järnbron över Storådalen strax söder om Velanda i betong. Betongbroar hade nog funnits tidigare, men sid 164 SJ 31 ger klart besked." Den första betongbron av betydenhet kom till utförande 1912 i form av ett 35 m valv över Flåsjöån på statsbanan Ulriksfors - Volgsjön.Som emellertid i detta fall valvets fasadytor bekläddes med granit och bron i övrigt byggdes av granitmurverk ,kommer den bärande betongkonstruktionen ej till synes" I SJ 1906 band 2 framgår det att granitbroar över 9 m ej förekom .Valven brukade vara max 7 m p.g.a. hållfastheten. :-) Sune

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