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Prestressed Concrete Committee for Economic Fabrication (PCEF)

PCEF Questions about Tall Piers – BQAD Followup

Bridge Quality Assurance Division’s responses are given below and are shown in red:

In response to another question outside the region on tall pier design and tall elastomeric bearing design for a multi-span continuous welded steel girder bridge, the States were asked to provide feedback on the following questions:

a) Provide references used on tall pier design (70' minimum), particularly with regard to wind load gradients, recommendations for construction joint spacing and bracing spacing, etc.

b) Recommended height limit on laminated elastomeric bearings

c) Tallest elastomeric bearing in service

d) Problems/long-term performance associated with the tall bearings

e) Type of side retainers/restrainers for tall elastomeric bearings (on normal, skewed, curved bridges)

f) Stability problems experienced during steel erection or in-service where the abutment has a PTFE bearing and the adjacent tall pier has a laminated elastomeric bearing


g) When an inner core is used to limit PTFE pad movement

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