Quarter ramp/door consists of three parts – main section, folding section, and flap. The cylinder installed between the main and folding sections adjusts the ramp tilt angle according to the quay height. This has designed in a structure to fully satisfy heavy loading strength and accommodate the balance and slope of the vessel. They are not limited in terms of the quay wall strength conditions by reducing the pressure on the pier through an auto tension function. In general, system is operated and controlled through the PLC program, but variety of operation methods are available according to customer request.
Stern ramp/door consists of two parts – main ramp and flap. Main ramp/door in closed position is fixed firmly by cleats and locking devices to ensure water-tightness, and the flap is designed as folding type as necessary. The auto-rail system can be applied in order to eliminate inconvenience to installation and disassembly of the handrail when opening/closing the stern ramp/door.
The Bow door is divided into Bow visor type and Bow shell door type. The Bow ramp connects the deck and land through the Bow door in the open position, and acts as a watertight door in the closed position.
PCTC uses Side Ramp/Door and Stern Ramp/Door simultaneously or alternately for fast loading/ unloading of thousands of vehicles. The side ramps of the level 2 or level 3 enable easy loading regardless of draft of ship or harbor condition. And level of use can be adjusted by the jigger winch for smooth and accurate operation. Generally, Side Ramp/Door is operated by a hydraulic winch, but the direct cylinder type is applied when used as level 1.