• ASME A17.1 compliance: The replacement jack unit and all associated work must conform to the latest revision of the ASME A17.1 safety code for elevators. • Jack assembly: The scope includes the complete removal and disposal of the existing inground jack assembly, cylinder, and piston. A new, double-bottom jack assembly must be installed to prevent catastrophic failure from corrosion. • Bore hole: If the existing hole collapses or is unsuitable, the contractor is responsible for redrilling the hole. • Corrosion protection: The new cylinder must be installed within a sealed PVC liner to prevent corrosion from groundwater. An electronic leak monitoring system is required to detect liquid in the casing and shut down the elevator if oil is detected. • Piston: The new plunger/piston must be machined from seamless steel tubing, ground and polished to a specific smoothness, and feature a stop ring to prevent it from leaving the cylinder. • Cylinder: The cylinder must be manufactured from steel pipe and pressure-tested at the factory. It should feature a double-bottom design with a welded, forged steel dish cap. • Piping: All hydraulic oil lines connecting the machine room to the jack assembly must be replaced. An approved pipe rupture valve (overspeed valve) must be installed in the pit, along with other necessary shutoff valves. • Fluid: The existing hydraulic fluid must be properly contained, removed, and recycled. New, recommended hydraulic fluid, such as ISO VG 32 turbine oil, must be provided. • Associated work: The bid should include all necessary demolition, excavation, backfilling, and patching. The contractor must also install new pit equipment, such as pit channels and buffers, and adjust the elevator valve for proper operation.
