ASTM Truss Steel Bridge Flexible Design Railway Railroad Truss Bridge
| Product Name | Steel Truss Bridge |
|---|---|
| Material | Prefabricate Steel |
| Spans | Short And Medium Spans |
| Bridge Deck | Composite Deck |
| Surface Protection | Painted |
| Standard | AISI, ASTM, BS, DIN, GB, JIS |
| Surface Finish | Painted or Galvanized |
| Size | Customized Size |
Characterized by vertical members and diagonal members that slope towards the center of the span. The vertical members provide a regular appearance while diagonal members are typically in tension and vertical members in compression.
Consists of a series of equilateral triangles, offering simpler member arrangement compared to Pratt truss designs.
The primary load-bearing structure composed of upper chord, lower chord and belly rod (diagonal and vertical bars). Nodes are categorized as large or small with pitch referring to the distance between nodes.
- Classification: Longitudinal connection and horizontal connection
- Function: Connects main trusses to form stable space structure capable of withstanding lateral loads
- Longitudinal system handles transverse horizontal loads including wind and centrifugal forces
- Transverse connection increases torsional stiffness and adjusts force distribution
Composed of longitudinal beams and cross beams with load transfer path: deck → longitudinal beams → cross beams → main truss.
Simple structure with fixed design, easy to install and manufacture.
Features multiple bar specifications with large internal forces in vertical rods and all large nodes.
Shear force distributed to two diagonal rods with short sections. Complex structure suitable for mounting/dismounting bridges.
Features two diagonal rods per node with small sections, ideal for large spans with favorable buckling stability.
Steel truss bridges are widely used for highway, railway, and pedestrian crossings over rivers, valleys, and urban areas. Their modular nature allows customization for various site requirements and traffic volumes.
Regular inspections for corrosion, fatigue, or damage are essential. Corrosion prevention through painting, galvanization, or cathodic protection ensures longevity. Damaged members must be repaired promptly.
- High Strength: Efficient load distribution through truss structure
- Durability: Withstands environmental conditions with proper maintenance
- Design Flexibility: Multiple configurations (Pratt, Warren, K-truss) for various requirements
- Long Service Life: Properly maintained bridges last decades
| Bridge Types | Bailey bridge (Compact-200, Compact-100, LSB, PB100, China-321, BSB), Modular bridge (GWD, Delta, 450-type), Truss Bridge, Warren bridge, Arch bridge, Plate bridge, Beam bridge, Box girder bridge, Suspension bridge, Cable-stayed bridge, Floating bridge |
| Design Spans | 10M to 300M Single span |
| Carriage Way | Single lane, Double lanes, Multilane, Walkway |
| Loading Capacity | AASHTO HL93.HS15-44, HS20-44, HS25-44, BS5400 HA+20HB, HA+30HB, AS5100 Truck-T44, IRC 70R Class A/B, NATO STANAG MLC80/MLC110, Truck-60T, Trailer-80/100Ton |
| Steel Grade | EN10025 S355JR S355J0/EN10219 S460J0/EN10113 S460N/BS4360 Grade 55C, AS/NZS3678/3679/1163/Grade 350, ASTM A572/A572M GR50/GR65, GB1591 GB355B/C/D/460C |
| Certificates | ISO9001, ISO14001, ISO45001, EN1090, CIDB, COC, PVOC, SONCAP |
| Welding Standards | AWS D1.1/AWS D1.5, AS/NZS 1554 or equivalent |
| Bolts | ISO898, AS/NZS1252, BS3692 or equivalent |
| Galvanization Code | ISO1461, AS/NZS 4680, ASTM-A123, BS1706 or equivalent |
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