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developmentsproducts &
32 Tube Products International July 2009
2,000 types of welded and
seamless steel tubes
Shenyang Dongyang Special Section Tube Co, Ltd is a joint venture company
founded in 1991. The company is mainly engaged in producing more than 2,000
kinds of welded and seamless structure steel tubes with compound sections,
such as square, rectangle, ellipse, semicircle, arch, sector, triangle, hexagon
and octagon.
Materials used include carbon steel
and stainless steel, and other alloyed
material. The company passed quality
system certification of ISO9001:2000
in 2002. The company’s products can
be produced according to national
and international standards including
Chinese GB, JIS, DIN, EN and ASTM.
The products are widely used in the
manufacture of vehicles, bridges, municipal engineering construction, and
in the chemical, petroleum, food, energy, electricity, aviation and aerospace
industries.
Products include hot-finished and high strength steel tube according to
EN10210 and EN10219. The highest yield strength can reach 690MPa (100 KSI).
The company also possesses equipment for curving, straightening, cutting and
polishing, for further processing of the steel tubes.
Shenyang Dongyang Special Section Tube Co, Ltd – China
•
Products from Shenyang Dongyang S S
Special Section Tube Co
An initial study was undertaken to look
at different options for the proposed
structure at Harthill. Having considered
and evaluated several different design
options for the new 90-metre bridge, the
recommended solution incorporated a
helical truss design, similar to that used
on the Greenside Place link bridge in
Edinburgh.
Presenting many benefits when it comes
to bridge design, a helical truss is
composed of steel members connected
at their ends by hinged pin connections
to form a stable configuration. The open
framework results in elements being
primarily in tension or compression,
creating a very light but stiff form of
construction. In addition, a helical truss
is perfect for footbridge construction as
it minimises the effective construction
depth and the length of approach
embankments.
Custom-designed and factory-manu-
factured, the bridge offers a high quality
solution that can easily be delivered
to site for instant installation, and, in
the instance of the M8 footbridge, an
aesthetically impressive final structure.
The impressive structure at Harthill took
full advantage of the aesthetic properties
The use of steel for modern bridges has
grown significantly over the last twenty
years, with engineers recognising the
benefits and versatility that steel offers
as a construction material. Steve
Whitfield, technical manager at Corus
Tubes, considers how the steel industry
is leading the way when it comes to the
design and construction of footbridges.
Modern steel bridges benefit from the
latest improvements in automated
fabrication and construction techniques
to provide economic solutions to
meet the demands of safety, rapid
construction, aesthetic appearance and
minimal maintenance.
One recent project to realise the benefits
that structural steel offers is a new
£5 million footbridge in North
Lanarkshire, Scotland. Delivered
on behalf of Transport Scotland, the
new bridge spans the M8 motorway,
replacing an existing footbridge that
was originally built in 1965. Located on
one of the busiest stretches of road in
Scotland, the new footbridge
forms an essential element in
the upgrading of the transport
hub now operating on the
site.
Bridges are significant
structures that have the power
to add or detract from the
landscape. Specifying steel
at the conceptual stage of the
design is one way in which
designers can ensure that
their architectural aspirations
are realised. It is an incredibly
strong material that can be
easily shaped, which gives
the advantage of being able
to significantly improve the
aesthetic appearance of the
structure, as all of the main
structural members can form
smooth curves throughout its
entire length.
The bridge challenge
The new bridge features a
helical truss design