G. Chemolli: Die Verbreitung von Gewölbebauten aus Beton und Stahlbeton für Brücken und Decken in der österreichisch-ungarischen Monarchie
Fig. 18 Schwimmschulbrücke in Steyr, 1898 
Schwimmschulbrücke in Steyr, 1898 
Beton- und Stahlbetonbau 112 (2017), Heft 12 831
same Exhibition in Vienna. After successful loading tests,
the structure collapsed for explosion provoked with the
assistance of the k.k. Technisches Militärkomitee [38,
pp. 361–364] (Fig. 20).
In one decade, since Brausewetter’s conference in 1889,
the situation had deeply changed. Vaults with Stampfbeton
and Monier system had found official recognition
and application. Furthermore, the way was opened to the
use of a variety of different systems with concrete and reinforced
concrete. Those systems would revolutionize the
construction of vaults in the Empire, similarly to what
was happening in other countries. It was the beginning of
an extraordinary evolution, from massive structures, even
if slender than the traditional ones in brick or stone, to
thin skeletons modeled by the lines of the forces.
system, mostly with average span 10 m, were
built on the underground lines; since 1898, vaults in
Stampfbeton with span between 16 and 23 m, were constructed
over the river Wien; vaulted structures for some
sanitary sewers were also realized with concrete. Between
1892 and 1900, many Privilegium on reinforced
concrete were registered in the Empire, for vaults for
floors and bridges; not all of them found an application.
Reinforced concrete, in a variety of systems, begun to be
used for structures and bridges of great span and slender
shape, entering in competition with iron structures.
Worth mentioning are three bridges, two built by G. A.
Wayss & Co. over the Ybbs, one near Groß-Hollenstein
in 1896, with an arch spanning 40 m, one near Waidhofen,
with an arch spanning 44 m, and one built by
& Brausewetter with Melan system in 1898, the
Schwimmschulbrücke in Steyr, with 42 m span and only
2.62 m rise [55, 49] (Fig. 18).
The massive, more traditional aspect of concrete structures
sometimes helped their affirmation; this was the
case of the Sarajevo Kaiser bridge in 1897, with span
25.37 m, where a project with system Wünsch was preferred
to others with iron.
Bridges were constructed also with Stampfbeton. Between
1894 and 1897, company Rella & Neffe built a
railway viaduct with two arches near Brünn Nordbahnhof.
In 1897, Pittel & Brausewetter constructed the
Schwarzau bridge in Reichenau an der Rax, with two
arches spanning 13 m . In 1898, Eduard Ast (1868–
1945), successor of Julius Chailly, exposed a vaulted
structure with 10 m span, 2 m large, in Stampfbeton, built
with system Kralik, at the Kaiser Franz Josef Jubilee Exhibition
in Vienna  (Fig. 19).
A last trial was conducted in 1898 on the arch with 13 m
span, 2 m large, exposed by G. A. Wayss & Co. at the
Fig. 19 Ingenieur Eduard Ast, J. Chailly’s Nachfolger, structure with system
Kralik, Kaiser Franz Josef Jubilee Exhibition in Vienna, 1898 
Ingenieur Eduard Ast, J. Chailly‘s Nachfolger, Tragstruktur mit System
Kralik, Kaiser Franz Josef Jubiläumsausstellung in Wien, 1898 
Fig. 20 Test on the structure built by G. A. Wayss & Co., Kaiser Franz Josef
Jubilee Exhibition in Vienna, 1898 
Test an einem Bogen, ausgestellt von G. A. Wayss & Co. auf der Kaiser
Franz Josef Jubiläumsausstellung in Wien, 1898