The use of Plate Girders gives scope to vary the girder sections to suit the loads carried at different positions along the bridge. The designer is free to choose the thickness of the web and size of the flange to suit the internal forces at different positions along the length of the span, though it must be remembered that too many changes may not lead to economy because of the additional fabrication work. Splices are expensive, whether bolted or welded. Often, the girders have parallel flanges, that is, they have a constant depth. However, with Plate Girders, the designer can also choose to vary the depth of the girder along its length. For longer spans, it is quite common to increase the girder depth over intermediate supports. For spans below about 50m, the choice (constant or varying depth) is often governed by aesthetics. Above 50m, varied depth may offer economy because of the weight savings possible in mid-span regions. The variation in depth can be achieved either by straight launching (tapered girders) or by curving the bottom flange. The shaped web, either for a variable depth or constant depth girder with a vertical camber, is easily achieved by profile cutting during fabrication. Generally, webs have a high depth/thickness ratio, and this leads to the need for intermediate transverse web stiffeners in regions of high shear (near supports)
At Goodluck, we have fabricated over 10,000 MT of Steel Bridges using Plate Girders for the following applications:
At Goodluck, we have fabricated over 10,000 MT of Steel Bridges using Plate Girders for the following applications:
Road Over Bridges from Spans 5 mtr to 49.5 mtrs
Railway Over Bridges from Spans 5 mtr to 49 mtrs
Foot Over Bridges of Spans 30 mtrs to 40 on railway stations and road
Link Bridges for Metros
Primary Structures like Crane Beams and Buck Stays. Composite Plate Girders made of Special Steels of grade 250 and 350 C and 410 B0 with impact values of 54 Joules at Minus 20 Deg C.
Normal Plate Girders of RDSO Spans of Raw Material Grade 350 B0 are regularly
being used.
Our Supplies include topographies of altitude above 2500 mtr from
Sea level and across river Roads Over Bridges have been supplied over canals and
viaduct.
Following Open Web Through Truss Girders are designed by RDSO:
Open Web Girders (B.G)
Open Web Girders (M.G)
Open Web Girders (Welded)
OOpen Web Girders are lightweight and the latest in technology of Girders using less steel weight yet absorbing double axle loads for MBG loading.At Goodluck India, we have fabricated more than 30 spans of OWG for spans ranging from 31 mtrs to 63 mtrs.
We at Goodluck have expert manpower and machinery to achieve perfectness in the component fabrication of OWG - like Bottom Chord and Top Chord straightness and Correctly aligned Stringers and Verticals. Our Expertise is in providing the right fit and camber correct OWG. Same is verified at trial assembly at our works. A large trial assembly area makes us capable of holding spans up to 100 mtrs.
We have Orders for 10 Bow strip girders to be supplied and erected. We have the expertise to fabricate bolted and welded designs from our workshop. Our expert erection team can execute critical projects that require site welding of sections.
As a reputable steel girder manufacturer, we take pride in offering innovative solutions for bridge construction projects.
Our expertise lies in crafting bowstring steel girders, a distinct and efficient structural system that combines strength, stability, and aesthetic appeal.
Riveted Bow string Girder
Welded Bow string Girder
Uses
Our bowstring steel girders find versatile applications in bridge projects, catering to various transportation needs:
Long Span BridgesFor projects requiring long spans, our bowstring girders deliver optimal load distribution and minimize deflection, ensuring robust and stable structures.
Highway OverpassesConstructing lightweight and durable highway overpasses is made possible with our bowstring girders, providing efficient load-bearing capabilities.
Railway ViaductsWe provide the strength and reliability needed for railway viaducts crossing vast distances and challenging terrains, ensuring safe and smooth train passage.
Advantages
Challenges
Our bowstring steel girders embody a perfect blend of tradition and innovation, making them an ideal choice for your bridge construction projects. As a manufacturer committed to quality and craftsmanship, we offer reliable solutions that exemplify engineering excellence, durability, and captivating aesthetics.
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