Introduction of Angle Steel Bracket and Inspection Ladder
What is a suspended inspection platform? It is a basic element made of angle steel bracket which is installed on the outside of the bridge pier near the pier cap. It’s used as a platform facility to facilitate maintenance workers’ inspection of the bridge pier and high-speed railway T-beams.
What is an inspection ladder? It allows maintenance personnel to enter the bridge piers for inspection and maintenance. They can effectively improve the efficiency of inspection and maintenance work and also greatly enhance safety.
Functions of Suspended Inspection Platform
These angle steel brackets made inspection platforms and ladders are key safety facilities in railway and highway bridge construction and maintenance, mainly used for personnel protection at heights and for platform construction for later maintenance.
- Core Function of Suspended Inspection Platform: it can provide safety isolation, prevent workers from accidentally falling, and also prevent outsiders from accidentally entering dangerous areas, thus ensuring the safety of the construction site or specific work areas.
- Applications: Suspended inspection platforms are installed on top of bridge piers, which are connected to the pier using pre-embedded bolts. They serve as a maintenance platform in the future. The installation requirements for the suspended inspection platform also vary due to the pier heights.
Pre-fabricated Angle Steel Bracket and Inspection Ladder For Sale
AGICO supplies pre-fabricated angle steel bracket and inspection ladders for highs-peed railway bridge project, AGICO has over 5 years of experience exporting embedded steel plate and prefabricated members to other countries. Check out the specifications below, and contact us if you need to make an order, besides standard dimensions, we offer customized fabrication service to meet each project with specific requirements:
Inspection ladder for Bridge Pier
- Specifications and models: 24-meter beams, 32-meter beams, 48-meter beams (full range of specifications, custom designs available upon request).
- Steel Material: Q235B, Q345B, Q345D (various materials available, customization possible)
- Surface treatment: Multi-alloy co-infiltration + passivation
- Applications: High-speed railway bridges, viaducts, urban railways, rail transit, building components
What’s the Function of Bridge Suspended Inspection Platform
- Safety precautions: Preventing falling objects and people from heights, providing barriers and enclosures during construction and maintenance.
- Inspection platform: Replaces traditional scaffolding, provides a stable operating surface for inspecting the supports on top of bridge piers, and reduces construction costs and safety hazards.
- Durability design: Utilizing hot-dip galvanizing or multi-alloy co-diffusion processes, it enhances corrosion resistance and adapts to complex environments such as humid and mountainous areas.
How to Install Angle Steel Bracket For Bridge Pier
- Installation and Positioning for Embedded Parts: During the pier body pouring, the channel sections and sleeves should be accurately embedded according to the drawings, with a horizontal error ≤3mm15.
- Corrosion protection treatment: Multi-alloy co-permeation corrosion protection.
- Bracket Welding and Fixing
Material processing: 75×8 angle steel cut, punched, and bent into shape, weld height ≥6mm12.
Installation method: Bracket aligned with embedded parts, bolted or fully welded (welding to prevent deformation). - Walkway Pannel Plate and Railing Installation:
Walkway panel plate slots are made of 50 mm angle steel, with uniform gaps between anti-slip step plates, and anti-loosening washers are added to the bolts.
Railing verticality: Welded or bolted connection, vertical deviation ≤3mm. - Acceptance and Maintenance
Strength inspection: A shaking test confirms no looseness and no cracks in the welds.
Corrosion protection and maintenance: Regularly reapply anti-corrosion coatings, paying particular attention to inspecting rusted areas.
AGICO also supplies customized fabrication of Angle Steel Bracket for suspended inspection platforms , if you are interested in bridge pier maintenance platform solutions, don’t hesitate to send a free quote now!
Manufacturing Process of Angle Steel Brackets
The manufacturing process of angle steel brackets includes the following steps:
- Angle Section Steel Cutting and Drilling: The angle steel bracket is made of Q235 angle steel. Generally, cutting and punching equipment is used to cut the raw angle steel into sections. Drill bolt holes for the fixing side of the angle steel bracket. Our sourcing factory owns advanced laser cutting equipment, which can perform cross-cutting and cut bolt holes of various sizes. In this step, a single raw angle steel piece is processed to the required length.
- Bending: The main support part of the angle steel bracket is bent at a fixed angle by bending machine to form a main support of nearly 90 degrees.
- Welding: The fixed parts of the suspended railing are welded by a skilled welder to form a near 90-degree main support. An angle iron is added to the bottom to reinforce the railing and create a triangular force distribution at a certain angle against the bridge pier wall. Then weld the angle iron sections with the major and side supports to form a triangular force distribution.
- Shot Blasting: After welding, the welded angle steel brackets need to undergo shot blasting to remove rust and burrs, forming a smooth surface.
- Multi-alloy co-diffusion. After passing through a shot blasting process, this member is placed in a zinc diffusion furnace for sealed galvanizing or zinc diffusion spraying.
- Passivation: Finally, the product is placed in a passivation bath for chemical passivation, which makes it adhere to the surface and less likely to fall off. Zinc-plated products need to be air-dried.
Quality Assurance for Angle Steel Bracket
We primarily inspect the dimensions, thickness, material, and mechanical properties of suspended inspection platform parts, such as angle steel, steel plates, and round steel, and provide manufacturer quality assurance documents (certificates of conformity and product quality certificates).
- Pier Top Embedded Bolts: Zinc-plated treatment is required.
- U-bolts: should be made of 20mm diameter round steel (HPB300, grade 8.8), 1170mm in length, with 60mm thread.
- All angle steel should be Q235-BZ material, 75×75×8mm in size.
- Steel plates should be Q235 material, with steel pads measuring 180×180×8mm and 220×80×8mm.
- The railing is should be made of 16mm diameter round steel (HPB300).
