Hebei Youou Bridge Materials
Support Anchor Plate
Prefabricated embedded steel plate with welded anchor bars for bridge bearings, expansion joints and structural anchorage.
Product Overview
Embedded steel anchorage for bridge load transfer
Support anchor plate, also called bearing embedded steel plate, expansion joint base plate or pier anchorage plate, is embedded before concrete pouring at cap beams, abutments, box girders and pier tops.
It is usually made from a main steel plate and welded anchor bars. After concrete curing, bearings, expansion joint steel profiles, anti-falling blocks, guardrail posts or other bridge components can be welded or fixed to the plate.
Core Functions
Why Anchor Plates Matter in Bridge Construction
Load Distribution
The steel base plate spreads concentrated bearing or expansion joint loads into a larger concrete area, reducing local cracking and crushing at pier tops and cap beams.
Permanent Anchorage
HRB400 ribbed anchor bars are welded to the back of the plate and embedded into concrete, creating strong mechanical bonding against vibration and long-term movement.
Flat Bearing Surface
Factory cutting, leveling and welding help keep the plate surface flat, so bridge bearings and joint components can sit evenly without partial suspension.
Horizontal Force Transfer
Vehicle braking force, wind load and seismic shear can be transferred through the embedded anchor plate into the bridge substructure.
Faster Site Work
Prefabricated welded plates reduce on-site cutting and welding, making installation faster and more controllable during concrete pouring.
Durable Corrosion Protection
Sand blasting, epoxy zinc-rich primer, topcoat or hot-dip galvanizing can be selected for wet, coastal or high-corrosion bridge environments.
Structure and Materials
Main plate, anchor bars and optional reinforcement ribs
The load-bearing main plate can be made from Q235B carbon steel for regular municipal bridges or Q355B high-strength low-alloy steel for heavy-load bridges and large-tonnage pot bearings.
Anchor bars are commonly HRB400 ribbed steel bars with welded joints. Plate thickness and bar diameter are selected according to drawings, bearing load and installation position.
Main Types
Customized by Bridge Position and Load Requirement
Bearing Anchor Plate
Square or rectangular plates for pot bearings, laminated rubber bearings and bridge support positions.
GPZ / QPZ pot bearings, rubber bearings, pier top bearing seatsExpansion Joint Base Plate
Embedded base plate used under expansion joint steel profiles to transfer joint load and shear force.
Bridge deck joint openings, steel profile anchorage, deck rehabilitationAnti-Falling and Seismic Plate
Thickened or special-shaped plates for anti-falling blocks, shock absorbers and seismic restraint devices.
Seismic bridge zones, beam-end restraint systems, interchange bridgesGuardrail and Sound Barrier Plate
Small customized plates used for bridge guardrail posts, anti-collision walls and sound barrier columns.
Bridge deck facilities, municipal bridges, noise barrier installationTypical Specification
Dimensions can be produced according to project drawings
Common plate sizes include 200x200, 250x250, 300x300, 400x400, 500x500 and 600x600 mm. Plate thickness can be selected from 12, 16, 20, 25 or 30 mm according to load level.
Anchor bar diameter is commonly 12-25 mm, with length and bending form customized for concrete depth and anchorage requirements.
Construction Process
Prefabricated welding for faster and more stable site installation
Anchor plates are produced according to drawings, welded with anchor bars, treated for corrosion protection and then positioned in the reinforcement cage before concrete pouring.
During pouring, concrete should be fully vibrated around the anchor bars to avoid honeycomb and voids. After curing, the plate surface is cleaned before welding or fixing bearings and expansion joint components.
Need Support Anchor Plates?
Send us drawings, plate size, thickness, anchor bar diameter, steel grade, anti-corrosion requirement and quantity. We will help confirm production details and quotation.