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Step-by-Step Installation Guide for DD Hollow Rubber Fender | D Shaped Dock Bumper

Installing a DD Hollow Rubber Fender correctly ensures maximum impact absorption, long service life, and reliable protection for ports, jetties, boats, trucks, and warehouses across Sabah, Sarawak, and Brunei. Below is a comprehensive step-by-step guide:

 

🔹 Step 1: Site Preparation

1. Inspect the Installation Surface
   • Ensure the dock wall, jetty, or vessel surface is clean, flat, and free of rust, debris, oil, or marine growth.
   • For concrete structures (e.g., Kota Kinabalu Port, Kuching Wharf, Muara Jetty), check for cracks and repair before installation.
   • For steel structures (e.g., tugboats, workboats, pontoons), remove rust and apply anti-corrosion coating.
2. Mark the Fender Position
   • Using chalk or markers, outline the exact alignment where the fender will be bolted.
   • Ensure correct spacing and alignment so the fender covers the main impact zones.

 

🔹 Step 2: Drill Mounting Holes

1. Positioning Holes
   • The DD Hollow Fender has a D-shaped hollow core, allowing bolts to pass through its internal cavity.
   • Mark drill points along the fender length, typically 500mm – 1,000mm intervals depending on size.
2. Drill Anchors
   • Use a hammer drill for concrete or a magnetic drill for steel surfaces.
   • Drill holes that match the bolt diameter (e.g., M16, M20, M24 depending on fender size).

 

🔹 Step 3: Insert Bolts & Anchors

1. Anchor Installation
   • For concrete docks (e.g., Sandakan Port, Sibu Jetty, Kuala Belait Wharf), use expansion anchors or chemical anchors.
   • For steel vessels (e.g., tugboats in Miri, ferries in Tawau, offshore supply boats in Brunei), weld steel backing plates and align bolt holes.
2. Corrosion Protection
   • Use galvanized steel bolts or stainless steel bolts (AISI 316) for marine applications.
   • Apply marine-grade grease or anti-seize coating to extend bolt life.

 

🔹 Step 4: Fender Positioning

1. Align the Fender
   • Place the DD Hollow Fender against the marked surface.
   • Ensure the outer D-shape faces outward to absorb vessel or vehicle impact.
   • Adjust position to maintain straight alignment.
2. Insert Bolts Through the Hollow Core
   • Pass bolts through the internal D-shaped cavity and tighten gradually.
   • Use washers and backing plates for even load distribution.

 

🔹 Step 5: Tightening & Securing

1. Tighten Bolts Evenly
   • Use a torque wrench to tighten bolts gradually, avoiding overtightening.
   • Start from the center bolts and move outward for uniform clamping.
2. Check Alignment
   • Ensure the fender is firmly pressed against the wall/vessel surface with no gaps.
   • The hollow core should remain free of deformation for proper compression.

 

🔹 Step 6: Final Inspection

1. Visual Check
   • Inspect bolts, anchors, and fender alignment.
   • Verify that all bolts are secured and no part of the fender is loose.
2. Impact Test
   • For marine installations, perform a low-speed vessel contact test (if possible).
   • For loading bays, test with a truck reversing into the dock.

 

🔹 Step 7: Maintenance After Installation

1. Routine Checks
   • Inspect fenders every 3–6 months in heavy-use ports like Sepanggar, Bintulu, Muara.
   • Check for wear, cracks, or loose bolts.
2. Cleaning
   • Remove barnacles, algae, and dirt buildup in marine areas (e.g., Tawau, Semporna, Limbang).
3. Bolt Re-Tightening
   • Re-check torque levels periodically, especially after high-impact events.

 

✅ Summary

The DD Hollow Rubber Fender is easy to install using bolt-through mounting and requires minimal maintenanceonce secured. With correct installation, it provides long-lasting protection for ports, boats, warehouses, bridges, and terminals across Sabah, Sarawak, and Brunei.