'(= (Counterweight_Runby ?X) (- (Counterweight_Bottom_Reference ?X) (- (Hoistway_Pit_Depth ?X) (+ (Counterweight_Buffer_Footing_Channel_Height ?X) (+ (Counterweight_Buffer_Blocking_Height ?X) (Counterweight_Buffer_Height (Elevator.Counterwtbuffer ?X)))))))