'(= (Counterweight_Overtravel ?X)
(- (Hoistway_Top_Landing_To_Underside_Machine_Beam ?X)
(+ (Deflector_Sheave_Protrusion ?X)
(+ (Counterweight_Buffer_Footing_Channel_Height ?X)
(+ (Counterweight_Buffer_Blocking_Height ?X)
(+ (Counterweight_Buffer_Height
(Elevator.Counterwtbuffer ?X))
(+ (Counterweight_Runby ?X)
(- (Counterweight_Frame_Height ?X)
(Hoistway_Pit_Depth ?X)))))))))