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Preloaded Spring Damper (PSD) - Jarret

Supplier: Spiers Engineering

A Preloaded Spring Damper (PSD) is a unit designed to dissipate seismic energy on structures such as bridges. The PSD reduces longitudinal and transverse displacement of the deck. JARRET can provide two types of PSDs: working in tension/compression, or acting only in compression.

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Price Guide: POA

JARRET can install the PSD compression type longitudinaly between the deck and the abutment, or install a PSD tension/compression unit in transverse between the deck and the pier structure. The Preloaded Spring Damper (PSD) - Jarret acts as a shear key which has the possibility to regenerate itself automatically after a dynamic event. The seismic energy is dissipated in the PSD unit instead of being dissipated in a steel or concrete structure.

JARRET can accommodate transverse and longitudinal seismic displacement, and at the same time take into account longitudinal displacement such as creep shrinkage and thermal expansion or contraction.

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