Elastomeric Bridge Bearing Inspection Checklist for New Construction

Pre-Installation Storage and Handling Verification

Before elastomeric bearings are positioned on bridge substructures, site quality control personnel must conduct a thorough receiving inspection. Bearings should be stored off the ground in clean, dry conditions protected from direct sunlight, ozone sources, and chemical contamination. Inspectors must verify that physical dimensions, elastomer durometer hardness, and internal steel reinforcement configurations match the approved shop drawings and project specifications. Any signs of splitting, excessive bulging, oil bleeding, or mechanical damage to the elastomer or external load plates must be documented immediately. Handling equipment should be selected to prevent dropping or stressing the elastomeric units. Final acceptance during storage depends strictly on conformance with the governing contract documents and approved submittals before any installation proceeds on site.

Substructure Seat Preparation and Elevation Control

Proper preparation of the concrete pier and abutment bearing seats is vital for uniform load transfer across elastomeric bearings. The concrete surface beneath the bearing pad must be level, smooth, and free of laitance, curing compounds, or debris. Surface elevations must be verified using precision optical instruments to ensure they fall within specified engineering tolerances. If grout pads or mortar beds are required under masonry plates, they must achieve the specified compressive strength before bearing placement and superstructure loading. Contractors must confirm that anchor bolt sleeves or cast-in-place anchor locations match the precise bolt holes outlined in approved structural drawings. Any deviations from specified grade or flatness must be corrected prior to setting any elastomeric components in position.

For a related project route, review Elastomeric Bearings in the context of Highway Bridges.

Bearing Placement and Temperature Adjustments

During the actual placement of elastomeric bearings, technicians must account for ambient temperature conditions and expected thermal movements. Bridge bearing pads should be oriented correctly relative to traffic flow and expected longitudinal and transverse expansion vectors. If external steel load plates or sole plates are utilized, torque values for clamping bolts and alignment pins must adhere strictly to structural design requirements. Inspectors should verify that no foreign materials are trapped between the bearing interface surfaces. Temperature corrections must be applied when setting bearings to ensure that initial offset positions correspond precisely with neutral design thermal conditions. Final bearing orientation and positioning must be formally signed off by quality assurance inspectors before girder erection commences.

Post-Installation Verification and Superstructure Load Transfer

Following superstructure placement, engineers must perform post-installation inspections to evaluate bearing behavior under initial dead loads. Inspectors need to measure uniform elastomer deformation and verify that edge bulging remains symmetrical without localized pinching or excessive shear distortion. Final clearance gaps between adjacent structural components must be checked against structural design drawings. Any immediate anomalies, such as uneven compression across the pad or unexpected tilting of sole plates, require engineering evaluation before proceeding with subsequent construction phases. Final acceptance of the installed elastomeric bearing assembly relies entirely on approved project design actions, engineering drawings, and governing specifications. Comprehensive inspection logs must be compiled and retained in permanent project quality records.