Bearing Type. Only deep-groove ball bearings are used. Bearings are pre-packed/sealed type. CONTRACT 51 ECC3 COVER PAGES
Bearing Type. The fixed bearings shall be a steel bearing plate sitting on steel setting plate with a Cotton Duck Pad (CDP). The expansion bearings shall have an upper stainless steel slide plate and a Teflon slide surface bonded to the CDP. The CDP shall be designed to transfer all loads from the bridge to the foundation using AASHTO Method A Design. Size shall be per the loads and anticipated rotations at the bearings determined by the Bridge Manufacturer. The upper stainless steel plate shall be large enough to cover the lower Teflon slide surface throughout the entire design temperature range. The Teflon shall be virgin PTFE resin tested per ASTM D4894 or D4895 and reinforcing agents including milled glass fibers. The stainless steel shall be no less than 11-gage A240 Type 304 having a surface finish of less than 20 microinches RMS. PTFE size shall be per loads and anticipated movements determined by the Bridge Manufacturer. Both expansion and fixed bearing plates shall have slotted holes for ease of installation. Bottom nut on the anchor bolt shall be finger tight and top nut tight at expansion bearings and both nuts on anchor bolt tight at fixed bearings.
Bearing Type. Only deep-groove ball bearings are used. Bearings are pre-packed/sealed type.
