E1/E2 Clearance Monitor

① Car Bottom Runby ▼

Run car level to CA (bottom terminal — EL. 675.16').
De-energize, engage pit stop switch, verify safe entry conditions.
From inside pit, measure from the bottom of the car platform straight down to the top of the car buffer plunger using a steel tape.
Take measurement at center of buffer plunger. Record to nearest 1/16".

⚠ ASME A17.1: Min 6" / Max 18" at 500 FPM. Design value: 6 7/16". Only 7/16" margin — monitor closely for rope stretch.

② CWT Bottom Runby ▼

Run car to TOP terminal landing (TL — EL. 1206.0'). CWT is now at its lowest point in pit.
De-energize, engage pit stop switch, verify safe entry.
Measure from the bottom of the counterweight frame down to the top of the CWT buffer plunger.
Record to nearest 1/16". Note: CWT buffer is on same platform as car buffer — top at 12'-3" from pit floor.

⚠ ASME A17.1: Min 6" / Max 18" at 500 FPM. Design value: 12". Good margin on both ends.

③ Car Top Clearance (CMT) ▼

Run car to TOP terminal landing (TL — EL. 1206.0').
Access car top via top-of-car operating station using inspection speed.
Identify the highest fixed point on top of car (crosshead, governor, any equipment).
Measure from that highest point up to the lowest overhead obstruction (beam, sheave support, conduit, etc.).
Record in inches. Design = 14'-0" (168").

⚠ Heavy loading and seasonal temperature changes cause rope stretch — reducing this clearance over time. Check under maximum load.

④ Pit Refuge Space ▼

This is a CALCULATED value — not directly field-measured each month.
Formula: Top of buffer from pit floor (12'-3" = 147") MINUS buffer stroke (18-1/4" = 18.25") = 128.75" (10'-8 3/4").
This represents how much clear space exists from pit floor to the bottom of the car when the buffer is fully compressed.
Monthly check: verify buffer platform mounting bolts are tight and platform has not shifted or settled.

⚠ ASME A17.1 Min: 24" from pit floor to car bottom at full buffer compression. This hoistway: 10'-8 3/4" — far exceeds minimum due to deep pit and elevated buffer platform.