It is the main horizontal support of a structure which supports smaller beams. Girders often have an I-beam cross section composed of two load-bearing flanges separated by a stabilizing web, but may also have a box shape, Z shape and other forms. A girder is commonly used to build bridges.
The H Beam is a kind of new economical structural steel. The cross-sectional part of H Beam is reasonable, causing good mechanical property. Compared with ordinary I Beam, the internal stress of H Beam is small; Section modulus is big; Weight is light, which causes structure weight reduce 30-40%. Due to its good mechanical performance, it is widely used in many constructions, especially those large-scaled constructions-workshops, bridges, ships, elevating machinery, equipment foundation, support, foundation pile and so on.
Steel Girder Bridges are deck bridges which are used for short and medium spans, for highway bridges composite deck construction is generally used unless the depth is very critical in which case half-through girders or through trusses may be necessary. The surface protection can be paint or hot-dip galvanized. Bridge load capacity, width can be designed according to user's requirements
Introduction: Bailey Bridge is a standard bridge equipment, adopted extensively and the most popular in the world Advantage: Possessing the features of simple structure, convenient transport, speedy erection easy disassembling, heavy loading capacity, great stability and long fatigue life being capable of an alternative span, loading capacity
Features: 1. High strength and big stiffness , relative to the concrete bridge can be reduced trabecular high and self-respect 2. Due to the steel isotropic, quality of a material is uniform and modulus of elasticity, that make steel bridge in the working condition and calculation compared with the assumption 3. Steel bridge generally USES factory, site splicing, the construction period is short, processing convenient and not affected by seasonal effect. 4. Steel bridge is suitable for industrialized manufacture and very convenient to transport. 5. Steel bridge is easy to repair and replace,long lifetime,material can be recycled.
Mixture form to erect all kinds of Temporary Bridges, Emergency Bridges and Fixed Bridges. Using the bridge equipment, the suspension bridges of varied span can be erected. The bridge has the advantages of few components, light weight and low cost. Bailey Bridge requires no special tools or heavy equipment for construction, the bridge elements are small enough to be carried in , and the bridge is strong enough to carry . It is considered a great example of military engineering.
The compact 200 panel bridge: The compact 200 panel bridge is similar to the compact 100 panel bridge from their appearance. The difference is its increased panel height to 2.134m. It employed the method of alternating joints between Reinforcement Chords and the joints between panels. This method can decrease inelastic deformation caused by the oversized pinholes. Pre-arch method is used to additionally cut down mid-span and vertical deflection to a larger degree. Bolt-connected components use the orienting sleeve- fixing method to increase accuracy of connections. Shear is created in orienting sleeves and tension is developed in bolts, which increase the usage life of the bolts and ensure the safety of panel bridges. Wind resistant brace is made to be composite type and is connected to transom/girders to improve overall stability of panel bridges.
Competitive Advantage: Heavy loading capacity Used as permanent bridge Good stability Simple in structure Long service life Rapid in erection No headroom limit No width limit
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