As an important connecting device between ships and docks, the installation quality of rubber gangways directly affects their operational safety and durability. During the installation process, multiple details need to be taken into account to ensure that the gangway can operate stably and safely. The following are the key details to be noted during the installation of rubber gangways:
1. Preparations before installation
- Site inspection: Before installation, a comprehensive inspection of the installation site is required to ensure that the ground is flat, solid, and capable of withstanding the weight and dynamic load of the gangway. If the ground is uneven, necessary repairs or reinforcement are required.
- Equipment inspection: Inspect the gangway and its accessories for intactness, confirm that all components are complete, especially check the rubber pads, fasteners, connecting bolts, etc. for intactness, and ensure there is no rust, crack, or other defects.
- Drawing verification: Verify the dimensions, model, and installation position of the gangway based on the design drawings to ensure they align with actual requirements.
2. Determination of installation location
- Horizontal alignment: The installation position of the gangway must be horizontal to ensure that the gangway does not tilt or sway during use. A level meter can be used for alignment to ensure that the support points of the gangway are on the same horizontal plane.
- Spacing control: The spacing between the gangway and the edge of the dock should be moderate, neither too close causing excessive pressure on the gangway nor too far causing the gangway to hang in the air. Generally, the spacing between the gangway and the edge of the dock should be controlled between 5-10 centimeters.
- Safety distance: The installation position of the gangway should ensure a sufficient safety distance between the ship and the dock to prevent the ship from colliding with the gangway during berthing or unberthing.
3. Fixing and connecting of the gangway
- Bolt tightening: The fixing bolts of the gangway must be tightened according to design requirements to ensure that each bolt is securely tightened in place and avoid loosening. A torque wrench should be used during tightening to ensure that the tightening force of the bolts meets the standard.
- Installation of rubber pads: Rubber pads serve as cushioning components between the gangway and the dock. During installation, it is essential to ensure that the rubber pads are flat, free from twists, and tightly fitted to both the gangway and the dock. The thickness of the rubber pads should be selected based on the load and usage environment of the gangway.
- Anti-slip measures: The surface of the gangway should be equipped with anti-slip strips or mats to ensure that personnel do not slip when climbing up and down the gangway. The spacing between anti-slip strips should be uniform to ensure effective anti-slip performance.
4. Adjustment and testing of the gangway
- Angle adjustment: The inclination angle of the gangway should be adjusted according to the height difference between the ship and the dock, ensuring that the slope of the gangway is moderate and avoiding being too steep or too gentle. Generally, the inclination angle of the gangway should be controlled between 20-30 degrees.
- Telescoping test: If the gangway has a telescoping function, a telescoping test is required after installation to ensure that the gangway can extend and retract smoothly, without any jamming or abnormal noise during the process.
- Load test: After installation, a load test is required for the gangway to ensure that it can withstand the design load. Sandbags or other heavy objects can be used for simulation testing to check the deformation and stability of the gangway.
5. Safety protection measures
- Guardrail installation: Guardrails should be installed on both sides of the gangway to ensure adequate protection for personnel when ascending or descending the gangway. The height of the guardrail should comply with safety standards, typically not less than 1 meter.
- Warning signs: Clear warning signs should be set up at the entrance and exit of the gangway to remind personnel to pay attention to safety. Especially at night or in low visibility conditions, reflective signs or lighting equipment should be installed.
- Anti-collision device: An anti-collision device should be installed at the end of the gangway to prevent the ship from directly colliding with the gangway when berthing. The anti-collision device can be made of rubber fenders or other cushioning materials.
6. Consideration of environmental factors
- Tidal influence: In ports with significant tidal variations, the installation location of the gangway should take into account the influence of tides to ensure that the gangway can be used normally at different tidal levels. If necessary, an adjustable height gangway can be installed.
- Weather conditions: During the installation process, it is necessary to consider weather conditions and avoid installation under adverse weather conditions. Especially during high winds, rainstorms, or thunderstorms, installation work should be suspended to ensure personnel safety.
- Corrosion protection: The gangway ladder, when exposed to the marine environment for a long time, is prone to corrosion from seawater. Therefore, during installation, it is essential to ensure that the surface of the gangway ladder is properly treated, and anti-corrosion coating treatment can be applied if necessary.
7. Maintenance and upkeep
- Regular inspection: After the installation of the gangway, regular inspections are required to ensure that all components of the gangway are not loose, worn, or corroded. Especially for vulnerable parts such as rubber pads, bolts, and anti-slip strips, they need to be replaced regularly.
- Cleaning and maintenance: The surface of the gangway should be cleaned regularly to avoid dust, oil stains, or other debris affecting its use. When cleaning, use clean water or a neutral detergent, and avoid using strong acid or alkali cleaners.
- Lubrication maintenance: If the gangway has moving parts (such as telescopic mechanisms or hinges), regular lubrication is required to ensure smooth operation of the moving parts. Appropriate lubricants should be used during lubrication to avoid excessive use that may lead to dust accumulation.
8. Personnel training and operational standards
- Operational training: After the installation of the gangway, relevant operators should be trained to ensure they are familiar with the usage and safety precautions of the gangway. Especially for the operation of telescopic gangways, strict adherence to operating procedures is required.
- Emergency plan: An emergency plan for the use of the gangway should be established to ensure that timely measures can be taken in case of malfunctions or unexpected situations with the gangway, thereby preventing accidents.
summary
The installation of rubber gangways is a complex process involving multiple steps and details. Only by strictly following the design requirements during installation can the safety and stability of the gangway be ensured. Through meticulous preparation, precise installation adjustments, effective safety precautions, and regular maintenance, the service life of the gangway can be extended, ensuring a safe connection between the ship and the dock.
