Donut Fender

 

Donut foam fenders are a type of marine fender that are designed to absorb and dissipate the kinetic energy caused by the impact or collision of a vessel with another object, such as another vessel or a quay wall. They are called "donut" fenders because of their cylindrical shape with a hole in the middle, similar to a donut.

 

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Donut Fenders are made of a high-density closed-cell foam core, which gives them their excellent shock-absorbing properties, and a tough, outer layer made of reinforced polyurethane. This outer layer helps to protect the fender from the harsh marine environment and extend its lifespan.

 

The donut shape of the foam fenders allows for a larger contact area and a more gradual deflection of the impact force. This reduces the risk of damage to both the fender and the protected vessel or structure, making them ideal for use in areas with high traffic or where vessels frequently berth and unberth.

 

Donut Fenders are easy to install and require little maintenance, which makes them a popular choice for many marine applications.

 

 

Characteristics

 

► Freely rotates around a pile

► Rises and falls with water level

► Low maintenance

► High performance 

► Low hull pressures

► Non-marking Polyurethane skin

 

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Applications

 

► Corner protection

► Turning structures

► Lead-in jetties

► Simple breasting dolphins

► Bridge protection

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Structure

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Dimensions

 

Donut Size D Maximum Pile ØP Energy* Reaction* Energy Reaction
mm ft mm ft kNm kN ft-kip kip
1270 4.2 610 2.0 7.2 116 1.6 7.9
1450 4.8 710 2.3 9.2 131 2.1 9.0
1520 5.0 762 2.5 10.5 140 2.4 9.6
1780 5.8 914 3.0 14.1 162 3.2 11.1
1910 6.3 995 3.3 16.4 175 3.7 12.0
2030 6.7 1067 3.5 18.6 186 4.2 12.8
2210 7.3 1185 3.9 22.3 204 5.0 14.0
2290 7.5 1219 4.0 23.6 210 5.3 14.4
2490 8.2 1345 4.4 28.0 229 6.3 15.7
2540 8.3 1372 4.5 29.3 234 6.6 16.0
2790 9.2 1524 5.0 35.3 256 7.9 17.6
2970 9.7 1636 5.4 40.1 273 9.0 18.7
3050 10.0 1676 5.5 42.1 280 9.5 19.2
3300 10.8 1829 6.0 49.5 304 11.1 20.8
3450 11.3 1933 6.3 54.6 319 12.3 21.9
3530 11.6 1981 6.5 57.2 327 12.9 22.4
3810 12.5 2134 7.0 65.9 350 14.8 24.0
3960 13.0 2241 7.4 72.1 366 16.2 25.1
4060 13.3 2286 7.5 75.1 374 16.9 25.6
4220 13.8 2388 7.8 81.3 389 18.3 26.7

 

 

Generic Performance Curve

 

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Detailed Photos

 

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