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Wedospace Bridge Prefabricated systems are manufactured from ASTM A709-50W weathering steel and adhere to the AASHTO LRFD design specification to support HL-93 vehicle live loads. Through factory precision prefabrication, the on-site installation cycle is shortened by more than 50% compared with traditional cast-in-place, and the design service life is as long as 100 years,and supports for bulk purchases.
HL-93
Load class
100 years
Design life
± 2mm
Manufacturing tolerance
With a modular design, all components are prefabricated in an ISO 9001 certified factory. Compared with the cast-in-place concrete (CIP) method, the on-site construction time is shortened by 50-60%. Usually after the foundation is ready, the bridge with a span of 30-60 meters can be completed in 3-7 days, which significantly reduces the project time cost.
Using CNC drilling and laser cutting technology, the dimensional tolerance of component connection holes is controlled within ± 2mm, ensuring a 100% matching rate of on-site bolt connection. This high-precision processing eliminates the need for on-site reaming, ensures that the mechanical performance of the node meets the design expectations, and reduces the installation risk.
The main girder and truss components are made of ASTM A588 / A709-50W high-strength weathering steel with a yield strength of 345 MPa. The dense oxide protective layer formed on the surface can resist atmospheric corrosion. Under the C3-C4 environmental level, the maintenance cost is reduced by 70% compared with ordinary carbon steel, and the maintenance demand of the whole life cycle is very low.
The design strictly follows AASHTO LRFD Bridge Design Specifications (9th Edition) or Eurocode standards. The standard configuration supports HL-93 highway loads (or HS-25 truck loads), and the single-lane carrying capacity can reach more than 70 tons, which fully meets the standards of mine transportation, heavy machinery traffic and highways.
Offers a single-span solution from 10 m to 90 m without intermediate piers. For special terrain (such as deep valleys or rivers), cantilever assembly or jacking method can be used for construction. The bridge deck width can be customized from 3.5m to 12m (single lane or two lane), and the sidewalk and pipeline support interface are reserved.
Although the initial material cost of prefabricated steel is slightly higher than that of traditional concrete, the cost of comprehensive engineering is usually reduced by 15-20% due to the need to build full-house supports, the reduction of 40% on-site labor input and the shortening of road closure time, especially in remote or heavy traffic areas.
| Parameter categories | Technical indicators | Remarks/Standards |
| Main materials | ASTM A709 Grade 50W (Weathering Steel) | Yield strength ≥ 345 MPa |
| Design Specifications | AASHTO LRFD / Eurocode 3 / BS 5400 | Execution will be carried out according to the client’s regional requirements. |
| Live load standard | AASHTO HL-93 / HS-25 / HS-20 | Support for heavy logistics and special vehicles |
| Effective span | 10m – 90m (33ft – 295ft) | Single span, without intermediate support |
| Bridge deck width | 3.0m – 12.0m | Supports single/dual lane customization |
| Bridge deck type | Orthotropic steel bridge deck / precast concrete slab / grating | Anti-slip treatment is required. |
| Anti-corrosion treatment | Hot-dip galvanizing (ISO 1461) or three-layer epoxy zinc-rich paint | Zinc plating thickness ≥ 85μm |
| Seismic resistance level | Peak ground acceleration (PGA) > 0.4g | Suitable for high-intensity earthquake zones |
| Connection method | Grade 10.9 high-strength bolts (friction type connection) | Twist-scissor type or large hexagonal head |
| Fatigue categories | Category B or C | 2 million loop loading tests |
Suitable for projects requiring urgent replacement or expansion of bridges due to aging. Bridge Prefabricated can complete the replacement of the old bridge within 48-72 hours, minimizing the traffic interruption time on the main road, which is very suitable for busy highway overpass and urban viaduct projects.
According to the traffic demand of heavy trucks (100 tons +) in the mining area, steel structure bridge with ultra-high load is provided. The modular design allows for disassembly and off-site reuse after the end of vein mining, meeting the temporary and high-intensity requirements of resource extraction projects, with a high return on assets.
In case of bridge damage caused by floods and earthquakes, it is used as an upgraded replacement for war-ready steel bridges or Bailey beams. Using its light weight and rapid assembly characteristics, the engineering team can quickly rush through the life rescue channel through the cantilever push-out method without large lifting equipment.
For developing countries or rural areas with complex terrain. Prefabricated kits contain all connectors and installation tools, reducing the reliance on highly skilled workers on site. Standardized component design allows teams with little experience in complex bridge construction to safely complete erection in accordance with the manual.
Concrete abutments shall be placed or steel pile foundations shall be installed according to the load reaction data sheets provided. Ensure that the elevation error of the support cushion stone is controlled within ± 5mm, and the anchor bolt position is pre-buried to match the bridge support bottom plate.
Unload components on a level ground near the bridge site. The main truss pieces, beams and diagonal braces shall be pre-assembled on the ground in sections according to the numbered drawings. Check the diagonal dimension with a caliper, make sure the member is square, and initially tighten the bolts to 50% torque.
For the span <30m, it is recommended to use two truck cranes for integral hoisting in place; for the span> 30m or the bridge cannot be operated, the cantilever push-out method guided by the nose frame is adopted, and the bridge is pushed to the opposite bank with the roller group.
After the bridge is in place, use an electric torque wrench to finish all high-strength bolts according to the specified torque value (torque coefficient check is required). Finally, lay precast bridge deck or pour pavement layer, install guardrail and expansion joint, complete delivery.
certificate
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Wedospace Bridge Prefabricated systems are manufactured from ASTM A709-50W weathering steel and adhere to the AASHTO LRFD design specification to support HL-93 vehicle live loads. Through factory precision prefabrication, the on-site installation cycle is shortened by more than 50% compared with traditional cast-in-place, and the design service life is as long as 100 years,and supports for bulk purchases.
Load class
HL-93
Design life
100 years
Manufacturing tolerance
± 2mm
With a modular design, all components are prefabricated in an ISO 9001 certified factory. Compared with the cast-in-place concrete (CIP) method, the on-site construction time is shortened by 50-60%. Usually after the foundation is ready, the bridge with a span of 30-60 meters can be completed in 3-7 days, which significantly reduces the project time cost.
Using CNC drilling and laser cutting technology, the dimensional tolerance of component connection holes is controlled within ± 2mm, ensuring a 100% matching rate of on-site bolt connection. This high-precision processing eliminates the need for on-site reaming, ensures that the mechanical performance of the node meets the design expectations, and reduces the installation risk.
The main girder and truss components are made of ASTM A588 / A709-50W high-strength weathering steel with a yield strength of 345 MPa. The dense oxide protective layer formed on the surface can resist atmospheric corrosion. Under the C3-C4 environmental level, the maintenance cost is reduced by 70% compared with ordinary carbon steel, and the maintenance demand of the whole life cycle is very low.
The design strictly follows AASHTO LRFD Bridge Design Specifications (9th Edition) or Eurocode standards. The standard configuration supports HL-93 highway loads (or HS-25 truck loads), and the single-lane carrying capacity can reach more than 70 tons, which fully meets the standards of mine transportation, heavy machinery traffic and highways.
Offers a single-span solution from 10 m to 90 m without intermediate piers. For special terrain (such as deep valleys or rivers), cantilever assembly or jacking method can be used for construction. The bridge deck width can be customized from 3.5m to 12m (single lane or two lane), and the sidewalk and pipeline support interface are reserved.
Although the initial material cost of prefabricated steel is slightly higher than that of traditional concrete, the cost of comprehensive engineering is usually reduced by 15-20% due to the need to build full-house supports, the reduction of 40% on-site labor input and the shortening of road closure time, especially in remote or heavy traffic areas.
| Parameter categories | Technical indicators | Remarks/Standards |
| Main materials | ASTM A709 Grade 50W (Weathering Steel) | Yield strength ≥ 345 MPa |
| Design Specifications | AASHTO LRFD / Eurocode 3 / BS 5400 | Execution will be carried out according to the client’s regional requirements. |
| Live load standard | AASHTO HL-93 / HS-25 / HS-20 | Support for heavy logistics and special vehicles |
| Effective span | 10m – 90m (33ft – 295ft) | Single span, without intermediate support |
| Bridge deck width | 3.0m – 12.0m | Supports single/dual lane customization |
| Bridge deck type | Orthotropic steel bridge deck / precast concrete slab / grating | Anti-slip treatment is required. |
| Anti-corrosion treatment | Hot-dip galvanizing (ISO 1461) or three-layer epoxy zinc-rich paint | Zinc plating thickness ≥ 85μm |
| Seismic resistance level | Peak ground acceleration (PGA) > 0.4g | Suitable for high-intensity earthquake zones |
| Connection method | Grade 10.9 high-strength bolts (friction type connection) | Twist-scissor type or large hexagonal head |
| Fatigue categories | Category B or C | 2 million loop loading tests |
Suitable for projects requiring urgent replacement or expansion of bridges due to aging. Bridge Prefabricated can complete the replacement of the old bridge within 48-72 hours, minimizing the traffic interruption time on the main road, which is very suitable for busy highway overpass and urban viaduct projects.
According to the traffic demand of heavy trucks (100 tons +) in the mining area, steel structure bridge with ultra-high load is provided. The modular design allows for disassembly and off-site reuse after the end of vein mining, meeting the temporary and high-intensity requirements of resource extraction projects, with a high return on assets.
In case of bridge damage caused by floods and earthquakes, it is used as an upgraded replacement for war-ready steel bridges or Bailey beams. Using its light weight and rapid assembly characteristics, the engineering team can quickly rush through the life rescue channel through the cantilever push-out method without large lifting equipment.
For developing countries or rural areas with complex terrain. Prefabricated kits contain all connectors and installation tools, reducing the reliance on highly skilled workers on site. Standardized component design allows teams with little experience in complex bridge construction to safely complete erection in accordance with the manual.
Concrete abutments shall be placed or steel pile foundations shall be installed according to the load reaction data sheets provided. Ensure that the elevation error of the support cushion stone is controlled within ± 5mm, and the anchor bolt position is pre-buried to match the bridge support bottom plate.
Unload components on a level ground near the bridge site. The main truss pieces, beams and diagonal braces shall be pre-assembled on the ground in sections according to the numbered drawings. Check the diagonal dimension with a caliper, make sure the member is square, and initially tighten the bolts to 50% torque.
For the span <30m, it is recommended to use two truck cranes for integral hoisting in place; for the span> 30m or the bridge cannot be operated, the cantilever push-out method guided by the nose frame is adopted, and the bridge is pushed to the opposite bank with the roller group.
After the bridge is in place, use an electric torque wrench to finish all high-strength bolts according to the specified torque value (torque coefficient check is required). Finally, lay precast bridge deck or pour pavement layer, install guardrail and expansion joint, complete delivery.