Seagrass Friendly Mooring Systems

Technical Information

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Safe working load
Shaft size

Shaft length

Base Helix dia
Load spreader size
Installation Tourque
1000 kg
80nb heavy wall steel

Sand / Shale 1500mm
Mud 2000mm

250mm - 300mm
4 x 400mm x 80mm
2500 nm
1600kg
 
80nb heavy wall steel

Sand / shale 3000mm
Mud 3500mm

250mm - 320mm
4 x 400mm x 80mm
3000 nm
2500kg
114mm Heavy wall steel

 
Sand / shale 3000mm
Mud 3500mm

250mm - 320mm
4 x 400 mm x 100mm
6000 nm

The loads shown above have a safety factor built in to allow for worst case scenarios. Actual tests have proved the achievable loads to be far greater than those shown. Note one of the tests have shown that this mooring system is capable of withstanding in excess of 2.5 tonne horizontal force.

Vessel size for each mooring is determined by site specific conditions including sea bed consistancy and exposure to wind and tidal movement.

For optimal results a test drilling is recomended to identify consistancy of sea bed for a suitable screw post/load spreader.

On Water Marine Services pty ltd
ABN:36128522627
ACN:128522627
336 Cabbage Tree Rd
Williamtown, NSW, 2318
Ph 0418232854
Fax (02)49651658