Late in the 19th century,
there were several significant advancements made in improving the method of
reinforcing concrete. In 1879 G. A.
Wayss, a German civil engineer and pioneer in the construction of iron and
steel structures, brought the German rights to patents developed a few years
earlier by the Frenchman, Monier. He
went on to open the first commercial reinforced concrete business in 1884
called Wayss & Freytag. Wayss is
credited with establishing reinforced concrete as a scientific technique.
Another contributor to the developing
field of reinforced concrete was Ernest L. Ransome. He is responsible for advancing the
innovation and development of nearly all of the earlier techniques from
previously known reinforced concrete inventors.
Among Ransome’s contributions was to patent “a system of ferro-concrete
with the iron rods twisted to improve the bond, then develop a patented Ransome
system for practical reinforced concrete construction.” His reinforced concrete
structures quickly earned him a reputation and he was given the opportunity to
build two of the first reinforced concrete bridges in North America.
One of the bridges was the Alvord Lake
Bridge built in 1889. The bridge, which
crosses the pedestrian entrance to San Francisco's Golden Gate Park, was
constructed as a single arch that is 64 ft. wide with a 20-ft. span. It, along with a couple of other reinforced
concrete structures in San Francisco, survived the 1906 earthquake and fire in outstanding
shape. The bridge was designated as an American
Society of Civil Engineers civil engineering landmark in 1969.
Other first reinforced concrete
projects include the Ingalls Building, a 16-story skyscraper built in 1904 in
Cincinnati, OH, which was the first skyscraper in the world to be constructed with
reinforced concrete. Although it is
currently for sale, the building is still standing and is a designated National
Historic Civil Engineering Landmark. Furthermore,
reinforced concrete provided the strength and resistance to fracturing to allow
for the construction of 20th century projects such as the Hoover Dam
and Grand Coulee Dam built in the mid-1930s.
The Conco Companies are a leading
supplier of concrete services for the Western U.S. We got our start in the Bay Area in 1959 by
offering clients the best value on a wide range of concrete services and
products. Since that time, we have taken
a leading role as one of the top concrete contractors in the region. We have
four regional offices serving California, Nevada, Washington, Oregon and
Colorado.
Sources: en.wikipedia.org/wiki/Reinforced_concrete,
en.wikipedia.org/wiki/Alvord_Lake_Bridge
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