Bridge Bearing Pads: PTFE_SLIDING
Elastomeric and other bridge bearing pad design properties per AASHTO LRFD Section 14.7 — plain elastomeric, steel-reinforced, PTFE sliding, disc, and pot bearings with shear modulus, compressive stress limits, and creep factors
| bearing type | durometer | bulk modulus ksi (ksi) | compressive stress limit ksi (ksi) | creep factor (dimensionless) | design method | max total compressive stress ksi (ksi) | notes | shear modulus MPa (MPa) | shear modulus ksi (ksi) | temp range F |
|---|---|---|---|---|---|---|---|---|---|---|
| PTFE_SLIDING | 60 | 290 | 4.5 | 0.35 | Method B | 4.5 | PTFE/stainless sliding surface over steel-reinforced pad; used when shear deformation exceeds 2.5 in; PTFE stress limit per Table 14.7.2.4-1 for dimpled filled PTFE | 0.896 | 0.13 | -20 to 130 |
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