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Show Huge Masonry Arch. The second largest masonry arch in the world has, according to Engineering Engineer-ing News, recently been built on a new railway In Austria. This arch is the largest span ot a bridge over 'ho Isonzo river, and is 278.9 feet, hav-tig hav-tig a riso ot 78 feet. The arch Is of oit stone founded on re-enforced concrete con-crete footings, backing Into solid rock. It is 6.6 feet thloiUgtha crown. The largest masonryflrrU the world Is at Plauen, acrmaay,lpNng a span of 295 feet, and the vjitfltherto second largest, A Luxemborg, with 277.6 feet span. |