Heavy Loading Steel Bridge Structure AISI ASTM BS Standard High Strength
| Attribute | Value |
|---|---|
| Product Name | Steel Structures |
| Loading Standard | Hl93/Ha+20hb/T44/Class a/B/MLC110/dB24 |
| Standard | AISI, ASTM, BS, DIN, GB, JIS |
| Specification | Customizable |
| Application | Roads, Railways, Highways, etc. |
Steel structures, such as those used in buildings, bridges, and industrial facilities, undergo a series of processing steps to transform raw steel materials into final assembled components.
Based on bridge floor positioning, steel truss bridges are classified as:
- Upper bearing steel truss bridge: Bridge floor located in the upper part of the main truss
- Lower bearing steel truss bridge: Bridge floor located in the lower part of the main truss
The primary load-bearing structure that supports vertical loads. Composed of:
- Upper chord
- Lower chord
- Belly rod (divided into diagonal bar and vertical bar)
Nodes are categorized as large or small nodes, with pitch referring to the distance between nodes.
Classified into longitudinal and horizontal connections that stabilize the structure against lateral loads.
- Longitudinal connection system: Includes upper and lower horizontal systems that withstand transverse loads, wind forces, and reduce chord free length
- Transverse connection: Comprising bridge frame and crosslink to enhance torsional stiffness and balance force distribution
Composed of longitudinal beams, beams, and their connections. Load transfer path:
- Load acts on longitudinal beam
- Transfers to beam
- Finally to main truss
The surface for vehicles and pedestrians, with similar forms to steel beam and combined beam bridges.
- Material selection and quality control
- Dimensional accuracy and tolerances
- Welding techniques and joint design
- Corrosion protection and maintenance
- Highway and Road Bridges: Suitable for various span lengths and terrains
- Pedestrian Bridges
- Large span capability
- Fast construction speed
- Energy efficient
- Aesthetic appearance
- Excellent seismic performance
| 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 | 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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