High Strength Segmental Box Girder Structural Formwork Bridges For
Highway And Railway Projects
Description
Box Girder Bridge is a bridge where the key beams consist of
girders shaped like a hollow box. Box girders comprise structural
steel, pre-stressed concrete, reinforced concrete or composite of
steel. Such girders are used for footbridges, railway bridges and
highway bridges. Box girders are mostly used for long span bridges
where the actual self weight of the bridges has to keep minimum.
They are also used for situations that require high torsional
stiffness of box girders.
Steel box girder bridges are commonly used for highway flyovers and
for modern elevated structures of light rail transport. Although
normally the steel box girder bridge is a form of beam bridge, box
girders may also be used on cable-stayed bridges and other forms.
| Product Name | Box girder bailey bridges |
| Width | 7.3meter, 7.6meter |
| Maximum span | 64meter single span and 200meter multi span |
| Bridge deck | Steel composit panel |
| Steel grade | Q345B (equivalent to ASTM A572) |
| Loading capacity | 20ton, 40ton truck etc, or HS20-44, HS25-44/Truck 20 |
| Corrosion | Original painted or Hot dip galvanized |
| Advantages | Price effective and technical full analysis and supports
|
Facts about box girders
A box girder comprises two concrete slabs — top and bottom. The
slabs are connected by an array of vertical bridge stems, also
known as webs. These webs can be vertical or inclined, as per your
requirement.
Box girders are formed by joining two web plates by a common flange
at both the ends. And this makes a closed cell that has enough
strength and torsional stiffness than that of an open section. And
this is the reason for choosing box girders.
Box girders are not generally used for construction of buildings.
However, they might be required in certain circumstances like when
the loads are carried eccentrically to beam axis.
Application
Generally used for urban bridges or highway viaducts and overpasses
with small spans
Reinforced concrete: medium and small span
Prestressed reinforced concrete: large span
Straight leg frame (door type) and slant leg frame: medium and
small span
T-shaped rigid frame, continuous rigid frame: large span· Road
Bridges· Pedestrian Bridges· Railway Bridges· Steel Truss Bridge·
Beam Bridges· Steel Bailey bridge· Structural Steel Box Bridge·
Highway Bridges· Composite Beam Bridge· Cable-Stayed Bridge·
Floating Bridge etc.
Advantages of box girders
Reduce the requirement for support points
Have high strength and torsional stiffness that give greater and
better suitability for horizontally curved bridges
Ensure enhanced durability
Require minimum maintenance of simple protective coatings as these
have less exposed surface and only a few edges
Our experienced team is focused on your steel bridge project's
success, from start to finish. Our proven ability to identify and
overcome design inconsistencies, potential problems with erection,
and shipping obstacles results in the fabrication of structural
steel that is right the first time, helping you avoid costly
construction delays.
Finally
The success of the Bailey bridge was due to the simplicity of the
fabrication and assembly of its modular components, combined with
the ability to erect and deploy sections with a minimum of
assistance from heavy equipment. Many previous designs for military
bridges required cranes to lift the pre-assembled bridge and lower
it into place. The Bailey parts were made of standard steel alloys,
and were simple enough that parts made at a number of different
factories could be completely interchangeable. Each individual part
could be carried by a small number of men, enabling army engineers
to move more easily and more quickly than before, in preparing the
way for troops and materiel advancing behind them. Finally, the
modular design allowed engineers to build each bridge to be as long
and as strong as needed, doubling or tripling up on the supportive
side panels, or on the roadbed sections.
